JUNIPER NETWORKS INC, 10-K filed on 2/24/2012
Annual Report
Document and Entity Information (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Feb. 17, 2012
Jun. 30, 2011
Document Information [Line Items]
 
 
 
Entity Registrant Name
JUNIPER NETWORKS INC 
 
 
Entity Central Index Key
0001043604 
 
 
Document Type
10-K 
 
 
Document Period End Date
Dec. 31, 2011 
 
 
Amendment Flag
false 
 
 
Document Fiscal Year Focus
2011 
 
 
Document Fiscal Period Focus
FY 
 
 
Current Fiscal Year End Date
--12-31 
 
 
Entity Well-known Seasoned Issuer
Yes 
 
 
Entity Voluntary Filers
No 
 
 
Entity Current Reporting Status
Yes 
 
 
Entity Filer Category
Large Accelerated Filer 
 
 
Entity Common Stock, Shares Outstanding
 
526,371 
 
Entity Public Float
 
 
$ 10,841 
Consolidated Statements of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Net revenues:
 
 
 
Product
$ 3,478,264 
$ 3,258,651 
$ 2,567,992 
Service
970,445 
834,615 
747,920 
Total net revenues
4,448,709 
4,093,266 
3,315,912 
Cost of revenues:
 
 
 
Product
1,155,283 
1,000,865 
841,722 
Service
424,836 
350,654 
290,987 
Total cost of revenues
1,580,119 
1,351,519 
1,132,709 
Gross margin
2,868,590 
2,741,747 
2,183,203 
Operating expenses:
 
 
 
Research and development
1,026,790 
917,855 
741,708 
Sales and marketing
1,001,060 
857,072 
759,131 
General and administrative
179,132 
177,859 
159,459 
Amortization of purchased intangible assets
5,366 
4,230 
10,416 
Litigation settlement charges
0 
0 
182,331 
Restructuring and other charges
30,564 
10,805 
19,463 
Acquisition-related and other charges
7,154 
6,342 
0 
Total operating expenses
2,250,066 
1,974,163 
1,872,508 
Operating income
618,524 
767,584 
310,695 
Other (expense) income, net
(46,808)
10,570 
1,366 
Income before income taxes and noncontrolling interest
571,716 
778,154 
312,061 
Income tax provision
146,704 
158,781 
196,833 
Consolidated net income
425,012 
619,373 
115,228 
Adjust for net (income) loss attributable to noncontrolling interest
124 
(971)
1,771 
Net income attributable to Juniper Networks
$ 425,136 
$ 618,402 
$ 116,999 
Net income per share attributable to Juniper Networks common stockholders:
 
 
 
Basic
$ 0.80 
$ 1.18 
$ 0.22 
Diluted
$ 0.79 
$ 1.15 
$ 0.22 
Shares used in computing net income per share:
 
 
 
Basic
529,768 
522,444 
523,603 
Diluted
541,417 
538,790 
534,015 
Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Current assets:
 
 
Cash and cash equivalents
$ 2,910,420 
$ 1,811,887 
Short-term investments
641,323 
474,514 
Accounts receivable, net of allowances
577,386 
596,622 
Deferred tax assets, net
154,310 
161,535 
Prepaid expenses and other current assets
156,222 
169,812 
Total current assets
4,439,661 
3,214,370 
Property and equipment, net
598,581 
493,881 
Long-term investments
740,659 
535,178 
Restricted cash and investments
78,307 
119,346 
Purchased intangible assets, net
123,114 
121,803 
Goodwill
3,928,144 
3,927,807 
Other long-term assets
75,354 
55,466 
Total assets
9,983,820 
8,467,851 
Current liabilities:
 
 
Accounts payable
324,843 
292,270 
Accrued compensation
223,018 
256,746 
Deferred revenue
712,663 
660,264 
Income taxes payable
12,545 
25,000 
Other accrued liabilities
193,634 
237,696 
Total current liabilities
1,466,703 
1,471,976 
Long-term debt
999,034 
0 
Long-term deferred revenue
254,364 
224,165 
Long-term income taxes payable
108,471 
103,823 
Other long-term liabilities
65,590 
59,087 
Commitments and Contingencies
   
   
Juniper Networks stockholders' equity:
 
 
Convertible preferred stock, $0.00001 par value; 10,000 shares authorized; none issued and outstanding
0 
0 
Common stock, $0.00001 par value; 1,000,000 shares authorized; 526,409 shares and 525,378 shares issued and outstanding at December 31, 2011, and 2010, respectively
5 
5 
Additional paid-in capital
10,079,169 
9,717,783 
Accumulated other comprehensive loss
(17,590)
(1,251)
Accumulated deficit
(2,972,402)
(3,108,337)
Total Juniper Networks stockholders' equity
7,089,182 
6,608,200 
Noncontrolling interest
476 
600 
Total equity
7,089,658 
6,608,800 
Total liabilities and equity
$ 9,983,820 
$ 8,467,851 
Consolidated Balance Sheets (Parentheticals) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Allowance for Doubtful Accounts
$ 9,523 
$ 10,110 
Convertible preferred stock, par value
$ 0.00001 
$ 0.00001 
Convertible preferred stock, shares authorized
10,000,000 
10,000,000 
Convertible preferred stock, shares issued
0 
0 
Convertible preferred stock, shares outstanding
0 
0 
Common stock, par value
$ 0.00001 
$ 0.00001 
Common stock, shares authorized
1,000,000,000 
1,000,000,000 
Common stock, shares issued
526,409,000 
525,378,000 
Common stock, shares outstanding
526,409,000 
525,378,000 
Consolidated Statements of Cash Flows (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash flows from operating activities:
 
 
 
Consolidated net income
$ 425,012 
$ 619,373 
$ 115,228 
Adjustments to reconcile consolidated net income to net cash from operating activities:
 
 
 
Amortization
27,878 
8,531 
15,427 
Depreciation
142,160 
146,757 
132,946 
Non-cash portion of share-based compensation
217,761 
177,825 
139,659 
Deferred income taxes
7,225 
64,035 
9,436 
Loss (gain) on equity investments
326 
(8,653)
5,562 
Excess tax benefits from share-based compensation
(44,961)
(48,500)
(3,510)
Other charges
13,462 
0 
0 
Changes in operating assets and liabilities, net of effects from acquisitions:
 
 
 
Accounts receivable, net
18,633 
(129,199)
(28,682)
Prepaid expenses and other assets
28,488 
(129,292)
(8,520)
Accounts payable
33,871 
48,217 
(2,422)
Accrued compensation
(32,228)
78,071 
16,079 
Accrued litigation settlements
0 
(169,330)
169,330 
Income tax payable
53,213 
25,193 
43,672 
Other accrued liabilities
13,639 
1,413 
28,566 
Deferred revenue
82,247 
127,894 
163,326 
Net cash provided by operating activities
986,726 
812,335 
796,097 
Cash flows from investing activities:
 
 
 
Purchases of property and equipment
(266,314)
(185,291)
(153,101)
Purchases of trading investments
(5,214)
(2,754)
0 
Purchases of available-for-sale investments
(2,297,363)
(1,577,758)
(1,461,532)
Proceeds from sales of available-for-sale investments
1,281,236 
537,916 
285,379 
Proceeds from maturities of available-for-sale investments
645,362 
1,086,514 
398,435 
Payment for business acquisition, net of cash and cash equivalents acquired
(30,720)
(374,765)
0 
Changes in restricted cash
(1,174)
(12,424)
(11,276)
Purchases of privately-held and other equity investments, net
(33,051)
(4,188)
(6,205)
Net cash used in investing activities
(707,238)
(532,750)
(948,300)
Cash flows from financing activities:
 
 
 
Proceeds from issuance of common stock
346,951 
451,039 
164,207 
Purchases and retirement of common stock
(548,590)
(565,473)
(453,888)
Issuance of long-term debt, net
991,556 
0 
0 
Change in customer financing arrangements
(15,833)
(3,487)
19,613 
Excess tax benefit from share-based compensation
44,961 
48,500 
3,510 
Return of capital to noncontrolling interest
0 
(3,000)
4,400 
Net cash provided by (used in) financing activities
819,045 
(72,421)
(262,158)
Net increase (decrease) in cash and cash equivalents
1,098,533 
207,164 
(414,361)
Cash and cash equivalents at beginning of period
1,811,887 
1,604,723 
2,019,084 
Cash and cash equivalents at end of period
2,910,420 
1,811,887 
1,604,723 
Cash paid for interest
35,655 
8,799 
5,417 
Cash (received) paid for taxes
(2,080)
155,700 
139,969 
Capitalized interest
$ 1,230 
$ 0 
$ 0 
Consolidated Statements of Changes in Equity (USD $)
In Thousands, unless otherwise specified
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Retained Earnings [Member]
Noncontrolling Interest [Member]
Parent [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, beginning of period at Dec. 31, 2008
 
$ 5 
$ 8,811,497 
$ (4,245)
$ (2,905,852)
$ 0 
$ 5,901,405 
Shares, Issued at Dec. 31, 2008
 
526,752 
 
 
 
 
 
Increase (Decrease) in Stockholders' Equity [Roll Forward]
 
 
 
 
 
 
 
Consolidated net income
115,228 
 
 
 
116,999 
(1,771)
115,228 
Change in net unrealized (loss) gain on investments, net
(2,800)
 
 
(2,757)
 
 
(2,757)
Change in foreign currency translation adjustment, net
5,600 
 
 
5,569 
 
 
5,569 
Consolidated comprehensive income
118,000 
 
 
 
 
 
118,040 
Purchase Of Subsidiary Shares By Noncontrolling Interest
 
 
 
 
 
4,400 
4,400 
Stock Issued During Period, Shares, Employee Stock Purchase Plans
3,200 
3,221 
 
 
 
 
 
Stock Issued During Period, Value, Employee Stock Purchase Plan
 
 
39,164 
 
 
 
39,164 
Stock Issued During Period, Shares, Restricted Stock Award, Gross
 
1,432 
 
 
 
 
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
8,600 
8,651 
 
 
 
 
 
Stock Issued During Period, Value, Stock Options Exercised
 
 
126,284 
 
 
 
126,284 
Stock Repurchased and Retired During Period, Shares
 
(20,715)
 
 
 
 
 
Stock Repurchased and Retired During Period, Value
 
 
(6,216)
 
(447,672)
 
(453,888)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Value
 
 
139,659 
 
 
 
139,659 
Adjustments to Additional Paid in Capital, Tax Effect from Share-based Compensation
 
 
(50,299)
 
 
 
(50,299)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, end of period at Dec. 31, 2009
 
5 
9,060,089 
(1,433)
(3,236,525)
2,629 
5,824,765 
Shares, Issued at Dec. 31, 2009
 
519,341 
 
 
 
 
 
Increase (Decrease) in Stockholders' Equity [Roll Forward]
 
 
 
 
 
 
 
Consolidated net income
619,373 
 
 
 
618,402 
(971)
619,373 
Change in net unrealized (loss) gain on investments, net
(300)
 
 
(317)
 
 
(317)
Change in foreign currency translation adjustment, net
500 
 
 
499 
 
 
499 
Consolidated comprehensive income
619,600 
 
 
 
 
 
619,555 
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders
 
 
 
 
 
(3,000)
(3,000)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
2,000 
1,974 
 
 
 
 
 
Stock Issued During Period, Value, Employee Stock Purchase Plan
 
 
41,829 
 
 
 
41,829 
Stock Issued During Period, Shares, Restricted Stock Award, Gross
 
2,224 
 
 
 
 
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
21,600 
21,568 
 
 
 
 
 
Stock Issued During Period, Value, Stock Options Exercised
 
 
409,395 
 
 
 
409,395 
Value Shares Assumed In Connection With Business Acquisition
 
 
2,355 
 
 
 
2,355 
Stock Repurchased and Retired During Period, Shares
(19,700)
(19,654)
 
 
 
 
 
Stock Repurchased and Retired During Period, Value
(563,500)
 
(75,242)
 
(488,284)
 
(563,526)
Stock Repurchased and Retired During Period Net of Issuances Shares
 
(75)
 
 
 
 
 
Shares Repuchased And Retired Related To Net Issuances
(1,900)
 
(17)
 
(1,930)
 
(1,947)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Value
 
 
177,825 
 
 
 
177,825 
Adjustments to Additional Paid in Capital, Tax Effect from Share-based Compensation
 
 
101,549 
 
 
 
101,549 
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, end of period at Dec. 31, 2010
6,608,800 
5 
9,717,783 
(1,251)
(3,108,337)
600 
6,608,800 
Shares, Issued at Dec. 31, 2010
 
525,378 
 
 
 
 
 
Increase (Decrease) in Stockholders' Equity [Roll Forward]
 
 
 
 
 
 
 
Consolidated net income
425,012 
 
 
 
425,136 
(124)
425,012 
Change in net unrealized (loss) gain on investments, net
(9,900)
 
 
(9,980)
 
 
(9,980)
Change in foreign currency translation adjustment, net
(6,400)
 
 
(6,359)
 
 
(6,359)
Consolidated comprehensive income
408,700 
 
 
 
 
 
408,673 
Stock Issued During Period, Shares, Employee Stock Purchase Plans
2,400 
2,400 
 
 
 
 
 
Stock Issued During Period, Value, Employee Stock Purchase Plan
 
 
51,687 
 
 
 
51,687 
Stock Issued During Period, Shares, Restricted Stock Award, Gross
 
2,431 
 
 
 
 
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period
13,900 
13,904 
 
 
 
 
 
Stock Issued During Period, Value, Stock Options Exercised
 
 
293,856 
 
 
 
293,856 
Stock Repurchased and Retired During Period, Shares
(17,500)
(17,500)
 
 
 
 
 
Stock Repurchased and Retired During Period, Value
(541,200)
 
(256,372)
 
(284,866)
 
(541,238)
Stock Repurchased and Retired During Period Net of Issuances Shares
 
(204)
 
 
 
 
 
Shares Repuchased And Retired Related To Net Issuances
(7,400)
 
(3,017)
 
(4,335)
 
(7,352)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Value
 
 
217,761 
 
 
 
217,761 
Adjustments to Additional Paid in Capital, Tax Effect from Share-based Compensation
 
 
57,471 
 
 
 
57,471 
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, end of period at Dec. 31, 2011
$ 7,089,658 
$ 5 
$ 10,079,169 
$ (17,590)
$ (2,972,402)
$ 476 
$ 7,089,658 
Shares, Issued at Dec. 31, 2011
 
526,409 
 
 
 
 
 
Basis of Presentation (Notes)
Basis of Presentation [Text Block]
Description of Business and Basis of Presentation

Description of Business

Juniper Networks, Inc (the “Company” or “Juniper”) designs, develops, and sells products and services that together provide customers with a high-performance network infrastructure built on simplicity, security, openness, and scale. The Company serves the high-performance networking requirements of global service providers, enterprises, governments, and research and public sector organizations that view the network as critical to their success.

Basis of Presentation

The consolidated financial statements, which include the Company and its wholly-owned subsidiaries are prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). All inter-company balances and transactions have been eliminated.

As of December 31, 2011, the Company owned a 60 percent interest in a joint venture with Nokia Siemens Networks B.V. (“NSN”). Given the Company's majority ownership interest in the joint venture, the accounts of the joint venture have been consolidated with the accounts of the Company, and a noncontrolling interest has been recorded for the noncontrolling investor's interests in the net assets and operations of the joint venture. In July 2011, NSN and the Company entered into an agreement to cease operation of and terminate the joint venture and subsequently NSN has assumed the activities of the joint venture. The Company is in the process of winding down this joint venture and the termination of this joint venture is not expected to have a material effect on the Company's financial position or results of operations.

Foreign Currency Translations
 
Assets and liabilities of foreign operations with non-U.S. Dollar functional currency are translated to U.S. Dollars using exchange rates in effect at the end of the period. Revenue and expenses are translated to U.S. Dollars using average exchange rates for the period. Foreign currency translation gains and losses were not material for the years ended December 31, 2011, 2010 and 2009.

Reclassifications

In the first quarter of 2010, the Company reclassified certain selling and marketing costs that were previously reported as cost of service revenues as sales and marketing expense. Accordingly, $25.1 million of costs reported in the year ended December 31, 2009, have been reclassified from cost of service revenues to sales and marketing expense to conform to the current period's presentation. The reclassification did not impact the Company's previously reported net revenues, segment results, operating income, net income, or earnings per share.
Summary of Significant Accounting Policies (Notes)
Summary of Significant Accounting Policies [Text Block]
Summary of Significant Accounting Policies
 
Use of Estimates
 
The preparation of the financial statements and related disclosures in conformity with U.S. GAAP requires the Company to make judgments, assumptions, and estimates that affect the amounts reported in the consolidated financial statements and the accompanying notes. The Company bases its estimates and assumptions on current facts, historical experience, and various other factors that it believes are reasonable under the circumstances, to determine the carrying values of assets and liabilities that are not readily apparent from other sources. To the extent there are material differences between our estimates and the actual results, our future consolidated results of operation may be affected.
 
Fair Value

Fair value is defined as the price that would be received upon sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining fair value, the Company considers the principal or most advantageous market in which it transacts, and considers assumptions that market participants would use when pricing the asset or liability. The Company applies the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:

Level 1 – Quoted prices in active markets for identical assets or liabilities.

Level 2 – Quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. These inputs are valued using market based approaches.

Level 3 – Inputs are unobservable inputs based on the Company’s assumptions. These inputs, if any, are valued using internal financial models.

Cash, Cash Equivalents and Investments
 
Cash and Cash Equivalents

All highly liquid investments purchased with an original maturity of three months or less are classified as cash and cash equivalents. Cash and cash equivalents consist of cash on hand, demand deposits with banks, highly liquid investments in money market funds, commercial paper, government securities, certificates of deposit, and corporate debt securities, which are readily convertible into cash.

Investments in Available-for-Sale and Trading Securities
 
Investments with stated maturities of greater than three months are classified as short-term or long-term investments. Management determines the appropriate classification of securities at the time of purchase and re-evaluates such classification as of each balance sheet date.

The Company's investments in publicly-traded debt securities are classified as available-for-sale. Available-for-sale investments are initially recorded at cost and periodically adjusted to fair value in the consolidated balance sheets. Unrealized gains and losses on these investments are reported as a separate component of accumulated other comprehensive income (loss). Realized gains and losses are determined based on the specific identification method and are reported in the consolidated statements of operations.

The Company recognizes an impairment charge for available-for-sale investments when a decline in the fair value of its investments below the cost basis is determined to be other than temporary. The Company considers various factors in determining whether to recognize an impairment charge, including the length of time the investment has been in a loss position, the extent to which the fair value has been less than the Company's cost basis, the investment's financial condition, and near-term prospects of the investee. If the Company determines that the decline in an investment's fair value is other than temporary, the difference is recognized as an impairment loss in its consolidated statements of operations.

The Company's non-qualified compensation plan, which invests in mutual funds are classified as trading securities and reported at fair value in the consolidated balance sheets. The realized and unrealized holding gains and losses are reported in the consolidated statements of operations.
 
Privately-Held Investments
 
The Company has investments in privately-held companies. These investments are included in other long-term assets in the consolidated balance sheets and are carried at cost, adjusted for any impairment, as the Company does not have a controlling interest and does not have the ability to exercise significant influence over these companies. These investments are inherently high risk as the market for technologies or products manufactured by these companies are usually early stage at the time of the investment by the Company and such markets may never be significant. The Company measures the fair value of privately-held investments using an analysis of the financial conditions and near term prospects of the investees, including recent financing activities and their capital structure. Realized gains and losses, if any, are reported in the consolidated statements of operations.

Derivatives
 
The Company uses derivatives to partially offset its market exposure to fluctuations in certain foreign currencies. The Company does not enter into derivatives for speculative or trading purposes.
 
The Company uses foreign currency forward contracts to mitigate variability in gains and losses generated from the re-measurement of certain monetary assets and liabilities denominated in non-functional currencies. These derivatives are carried at fair value with changes recorded in other (expense) income, net. Changes in the fair value of these derivatives are largely offset by re-measurement of the underlying assets and liabilities. Cash flows from such derivatives are classified as operating activities. These foreign exchange forward contracts have maturities of one year or less.
 
The Company also uses foreign currency forward or option contracts to hedge certain forecasted foreign currency transactions relating to operating expenses. These derivatives are designated as cash flow hedges and have maturities of less than one year. These derivatives are carried at fair value and the effective portion of the derivative's gain or loss is initially reported as a component of accumulated other comprehensive income (loss), and upon occurrence of the forecasted transaction, is subsequently reclassified into the operating expense line item to which the hedged transaction relates. The Company records any ineffectiveness of the hedging instruments, which was immaterial during 2011, 2010, and 2009, in other (expense) income, net, on its consolidated statements of operations. Cash flows from such hedges are classified as operating activities.

Concentrations
 
Financial instruments that subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, investments, and accounts receivable. The Company invests only in high-quality credit instruments and maintains its cash, cash equivalents, available-for-sale investments in fixed income securities, and money market funds with several high-quality institutions. Deposits held with banks, including those held in foreign branches of global banks, may exceed the amount of insurance provided on such deposits. These deposits may be redeemed upon demand and, therefore, bear minimal risk.
 
Generally, credit risk with respect to accounts receivable is diversified due to the number of entities comprising the Company's customer base and their dispersion across different geographic locations throughout the world. The Company performs ongoing credit evaluations of its customers and generally does not require collateral on accounts receivable. The Company maintains reserves for potential bad debt and historically such losses have been within management's expectations. No single customer accounted for more than 10% of the Company's total net revenues for 2011. Verizon Communications, Inc., and AT&T, Inc., accounted for 10.6%, and 10.4% of the Company's total net revenues for 2010 and 2009, respectively.
 
The Company relies on sole suppliers for certain of its components such as ASICs and custom sheet metal. Additionally, the Company relies primarily on a limited number of significant independent contract manufacturers for the production of all of its products. The inability of any supplier or manufacturer to fulfill supply requirements of the Company could negatively impact future operating results.
 
Property and Equipment
 
Property and equipment are recorded at cost less accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets of one and half years to five years for computers, equipment and software, five years for furniture and fixtures, seven to forty years for building and building improvements, and ten to forty years for land improvements. Leasehold improvements are amortized using the straight-line method over lease term, for a maximum of ten years. Construction in progress is related to the construction or development of property and equipment that have not yet been placed in service for their intended use. Depreciation for equipment commences once it is placed in service and depreciation for buildings and leasehold improvements commences once they are ready for their intended use.
 
Goodwill and Other Long-Lived Assets
 
Goodwill represents the purchase price over estimated fair value of net assets of businesses acquired in a business combination. Goodwill and other intangible assets acquired in a business combination and determined to have an indefinite useful life are not amortized, but instead tested for impairment at least annually during the fourth quarter. Such goodwill and other intangible assets may also be tested for impairment between annual tests in the presence of impairment indicators such as, but not limited to: (a) a significant adverse change in legal factors or in the business climate; (b) a substantial decline in our market capitalization, (c) an adverse action or assessment by a regulator; (d) unanticipated competition; (e) loss of key personnel; (f) a more likely-than-not expectation of sale or disposal of a reporting unit or a significant portion thereof; (g) a realignment of our resources or restructuring of our existing businesses in response to changes to industry and market conditions; (h) testing for recoverability of a significant asset group within a reporting unit; or (i) higher discount rate used in the impairment analysis as impacted by an increase in interest rates.

The Company performs its annual goodwill impairment analysis at its reporting unit level, which is one level below its operating segment level during the fourth quarter of each year. The fair value of the Company's reporting units is determined using both the income and market valuation approaches. Under the income approach, the fair value of the reporting unit is based on the present value of estimated future cash flows that the reporting unit is expected to generate over its remaining life. Under the market approach, the value of the reporting unit is based on an analysis that compares the value of the reporting unit to values of publicly traded companies in similar lines of business. In the application of the income and market valuation approaches, the Company is required to make estimates of future operating trends and judgments on discount rates and other variables. Actual future results related to assumed variables could differ from these estimates.

Long-lived assets, such as property, plant, and equipment, and purchased intangible assets subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Such events or circumstances include, but are not limited to, a significant decrease in the fair value of the underlying business, a significant decrease in the benefits realized from an acquired business, difficulties or delays in integrating the business or a significant change in the operations of an acquired business. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset, or asset group, to estimated undiscounted future cash flows expected to be generated by the asset, or asset group. An impairment charge is recognized by the amount by which the carrying amount of the asset exceeds its fair value.

The Company amortizes intangible assets with estimable useful lives on a straight-line basis over their useful lives.

Revenue Recognition
 
Revenue is recognized when all of the following criteria have been met:

•
Persuasive evidence of an arrangement exists.  The Company generally relies upon sales contracts or agreements, and customer purchase orders to determine the existence of an arrangement.

•
Delivery has occurred.  The Company uses shipping terms and related documents, or written evidence of customer acceptance, when applicable, to verify delivery or performance.

•
Sales price is fixed or determinable.  The Company assesses whether the sales price is fixed or determinable based on the payment terms and whether the sales price is subject to refund or adjustment.

•
Collectability is reasonably assured.  The Company assesses collectability based on creditworthiness of customers as determined by our credit checks and their payment histories. The Company records accounts receivable net of allowance for doubtful accounts, estimated customer returns, and pricing credits.
 
In 2010, the Company adopted, on a prospective basis, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2009-13, Topic 605 - Multiple-Deliverable Revenue Arrangements (“ASU 2009-13”). ASU 2009-13 changes the requirements for establishing separate units of accounting in a multiple element arrangement and requires the allocation of arrangement consideration to each deliverable to be based on the relative selling price. Concurrently with issuing ASU 2009-13, the FASB also issued ASU No. 2009-14, Topic 985 - Certain Revenue Arrangements That Include Software Elements (“ASU 2009-14”). ASU 2009-14 excludes software that is contained on a tangible product from the scope of software revenue guidance if the software component and the non-software component function together to deliver the tangible products' essential functionality. The Company applied these two standards for new and materially modified arrangements originating after December 31, 2009.

When a sales arrangement contains multiple elements and software and non-software components function together to deliver the tangible products' essential functionality, the Company allocates revenue to each element based on a selling price hierarchy. The selling price for a deliverable is based on its vendor-specific objective evidence (“VSOE”) if available, third-party evidence (“TPE”) if VSOE is not available, or estimated selling price (“ESP”) if neither VSOE nor TPE is available. The Company then recognizes revenue on each deliverable in accordance with its policies for product and service revenue recognition. VSOE of selling price is based on the price charged when the element is sold separately. In determining VSOE, the Company requires that a substantial majority of the selling prices fall within a reasonable range based on historical discounting trends for specific products and services. TPE of selling price is established by evaluating largely interchangeable competitor products or services in stand-alone sales to similarly situated customers. However, as the Company's products contain a significant element of proprietary technology and its solutions offer substantially different features and functionality, the comparable pricing of products with similar functionality typically cannot be obtained. Additionally, as the Company is unable to reliably determine what competitors products' selling prices are on a stand-alone basis, the Company is not typically able to determine TPE. The ESP is established considering multiple factors including, but not limited to pricing practices in different geographies and through different sales channels, gross margin objectives, internal costs, competitor pricing strategies, and industry technology lifecycles.

In multiple element arrangements where software deliverables are included, revenue is allocated to each separate unit of accounting for each of the non-software deliverables and to the software deliverables as a group using the relative selling prices of each of the deliverables in the arrangement based on the aforementioned selling price hierarchy. If the arrangement contains more than one software deliverable, the arrangement consideration allocated to the software deliverables as a group is then allocated to each software deliverable using the guidance for recognizing software revenue.

The Company limits the amount of revenue recognition for delivered elements to the amount that is not contingent on the future delivery of products or services or subject to customer-specific return or refund privileges. The Company evaluates each deliverable in an arrangement to determine whether they represent separate units of accounting. A deliverable constitutes a separate unit of accounting when it has stand-alone value and there are no customer-negotiated refunds or return rights for the delivered elements. If the arrangement includes a customer-negotiated refund or return right relative to the delivered item, and the delivery and performance of the undelivered item is considered probable and substantially in the Company's control, the delivered element constitutes a separate unit of accounting. In circumstances when the aforementioned criteria are not met, the deliverable is combined with the undelivered elements, and the allocation of the arrangement consideration and revenue recognition is determined for the combined unit as a single unit. Allocation of the consideration is determined at arrangement inception on the basis of each unit's relative selling price. The new standards do not generally change the units of accounting for the Company's revenue transactions.

Prior to 2010, and for current software sales, the Company allocated revenue to each element using the residual method when the VSOE of fair value of the undelivered items for arrangements with multiple elements, such as sales of products that include services and software, exists. Under the residual method, the amount of revenue allocated to delivered elements equals the total arrangement consideration less the aggregate fair value of any undelivered elements. If VSOE of one or more undelivered items does not exist, revenue from the entire arrangement is deferred and recognized at the earlier of: (i) delivery of those elements or (ii) when fair value can be established unless maintenance is the only undelivered element, in which case, the entire arrangement fee is recognized ratably over the contractual support period.

The Company accounts for multiple agreements with a single customer as one arrangement if the contractual terms and/or substance of those agreements indicate that they may be so closely related that they are, in effect, parts of a single arrangement. For sales to direct end-users, value-added resellers, and original equipment manufacturer ("OEM") partners, the Company recognizes product revenue upon transfer of title and risk of loss, which is generally upon shipment. It is the Company's practice to identify an end-user prior to shipment to a value-added reseller. For the Company's end-users and value-added resellers, there are no significant obligations for future performance such as rights of return. The Company's agreements with its OEM partners may allow future rights of returns or pricing credits. A portion of the Company's sales is made through distributors under agreements allowing for pricing credits or rights of return. Product revenue on sales made through these distributors is recognized upon sell-through as reported by the distributors to the Company. Deferred revenue on shipments to distributors reflects the effects of distributor pricing credits and the amount of gross margin expected to be realized upon sell-through. Deferred revenue is recorded net of the related product costs of revenue.
 
The Company records reductions to revenue for estimated product returns and pricing adjustments, such as rebates and price protection, in the same period that the related revenue is recorded. The amount of these reductions is based on historical sales returns and price protection credits, specific criteria outlined in rebate agreements, and other factors known at the time.
 
Service revenues include revenue from maintenance, training, and professional services. Maintenance is offered under renewable contracts. Revenue from maintenance service contracts is deferred and recognized ratably over the contractual support period, which is generally one to three years. Revenue from training and professional services is recognized as services are completed or ratably over the contractual period, which is generally one year or less.
 
The Company sells certain interests in accounts receivable on a non-recourse basis as part of customer financing arrangements primarily with one major financing company. Cash received under this arrangement in advance of revenue recognition is recorded as a secured borrowing within other current liabilities.
 
Allowance for Doubtful Accounts
 
The allowance for doubtful accounts is based on the Company's assessment of the collectability of customer accounts. The Company regularly reviews its receivables that remain outstanding past their applicable payment terms and establishes allowance and potential write-offs by considering factors such as historical experience, credit quality, age of the accounts receivable balances, and current economic conditions that may affect a customer's ability to pay.
 
Warranty Reserves
 
The Company generally offers a one-year warranty on all of its hardware products and a 90-day warranty on the media that contains the software embedded in the products. Warranty costs are accrued as part of the Company's cost of sales based on associated material costs, labor costs, and overhead at the time revenue is recognized. Material costs are estimated primarily based upon the historical costs to repair or replace product returns within the warranty period. Labor and overhead costs are estimated primarily based upon historical trends in the cost to support customer cases within the warranty period.
 
Contract Manufacturer Liabilities
 
The Company outsources most of its manufacturing, repair, and supply chain management operations to its independent contract manufacturers, and a significant portion of its cost of revenues consists of payments to them. The independent contract manufacturers produce the Company's products using design specifications, quality assurance programs, and standards established by the Company, and they procure components and manufacture the products based on the Company's demand forecasts. These forecasts are the Company's estimates of future demand for its products, based upon historical trends and analysis from the Company's sales and marketing organizations, adjusted for overall market conditions. The Company establishes a provision for inventory, carrying costs, and obsolete material exposures for excess components purchased based on historical trends.

Research and Development
 
Costs to research, design, and develop the Company's products are expensed as incurred. Software development costs are capitalized beginning when a product's technological feasibility has been established and ending when a product is available for general release to customers. Generally, the Company's products are released soon after technological feasibility has been established. As a result, costs incurred between achieving technological feasibility and product general availability have not been significant, and all software development costs have been expensed as incurred.
 
Advertising
 
Advertising costs are charged to sales and marketing expense as incurred. Advertising expense was $17.2 million, $17.1 million, and $11.4 million, for 2011, 2010, and 2009, respectively.
 
Loss Contingencies
 
The Company is subject to the possibility of various loss contingencies arising in the ordinary course of business. Management considers the likelihood of loss related to an asset, or the incurrence of a liability, as well as its ability to reasonably estimate the amount of loss, in determining loss contingencies. An estimated loss contingency is accrued when it is probable that an asset has been impaired or a liability has been incurred and the amount of loss can be reasonably estimated. The Company records a charge equal to the minimum estimated liability or a loss contingency only when both of the following conditions are met: (i) information available prior to issuance of the consolidated financial statements indicates that it is probable that an asset had been impaired or a liability had been incurred at the date of the financial statements, and (ii) the range of loss can be reasonably estimated. The Company regularly evaluates current information available to determine whether such accruals should be adjusted and whether new accruals are required.
  
Share-Based Compensation

The Company utilizes the Black-Scholes-Merton (“BSM”) option-pricing model in order to estimate the fair value of its share-based payment awards on the date of grant. Share-base compensation expense for expected-to-vest share-based awards is valued under the single-option approach and and amortized on a straight-line basis, net of estimated forfeitures, and RSUs and PSAs are amortized on a ratable basis, net of estimated forfeitures. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service period.

The BSM model requires various highly subjective assumptions that represents management's best estimates of volatility, expected option life, and risk-free interest rate. The expected volatility is based on the implied volatility of market traded options on our common stock, adjusted for other relevant factors including historical volatility of our common stock over the most recent period commensurate with the estimated expected life of our stock options. The expected life of an award is based on historical experience, the terms and conditions of the stock awards granted to employees, as well as the potential effect from options that have not been exercised at the time.

Provision for Income Taxes
 
Deferred tax assets and liabilities are measured using the currently enacted tax rates that apply to taxable income in effect for the years in which those tax assets are expected to be realized or settled. The Company regularly assesses the likelihood that its deferred tax assets will be realized from recoverable income taxes or recovered from future taxable income. To the extent that the Company believes any amounts are not more likely than not to be realized through the reversal of the deferred tax liabilities and future income, the Company records a valuation allowance to reduce its deferred tax assets. In the event the Company determines that all or part of the net deferred tax assets are not realizable in the future, an adjustment to the valuation allowance would be charged to earnings in the period such determination is made. Similarly, if the Company subsequently realizes deferred tax assets that were previously determined to be unrealizable, the respective valuation allowance would be reversed, resulting in an adjustment to earnings in the period such determination is made. In addition, the calculation of tax liabilities involves dealing with uncertainties in the application of complex tax regulations. The Company recognizes and measures potential liabilities based on its estimate of whether, and the extent to which, additional taxes will be due.
Comprehensive Income (Loss)
 
Comprehensive income (loss) is defined as the change in equity during a period from transactions and other events and circumstances from non-owner sources. The Company includes the components of comprehensive income (loss) as part of its consolidated statements of changes in equity. Accumulated other comprehensive income (loss) includes net unrealized gains (losses) on available-for-sale securities and on derivatives designated as cash flow hedges that are excluded from net income, and net foreign currency translations.
 
Recent Accounting Pronouncements

In May 2011, the Financial Accounting Standards Board ("FASB") issued ASU No. 2011-04, Topic 820 - Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs (“ASU 2011-04”), which amends current fair value measurement and disclosure guidance to converge with International Financial Reporting Standards ("IFRS") and provides increased transparency around valuation inputs and investment categorization. This guidance is effective for fiscal years and interim periods, beginning after December 15, 2011. Early application by public companies is not permitted. The Company's adoption of ASU 2011-04 will not have an impact on its consolidated results of operations or financial condition.

In June 2011, the FASB issued ASU No. 2011-05, Topic 220 - Presentation of Comprehensive Income (“ASU 2011-05”), which requires an entity to present total comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements and eliminates the option to present the components of other comprehensive income as part of the statement of changes in stockholders' equity. This guidance is effective for fiscal years and interim periods, beginning after December 15, 2011. The Company's adoption of ASU 2011-05 will not have an impact on its consolidated results of operations or financial condition.

In September 2011, the FASB issued ASU No. 2011-08, Topic 350 - Intangibles - Goodwill and Other ("ASU 2011-08"), which amends Topic 350 to allow an entity to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. An entity would not be required to calculate the fair value of a reporting unit unless the entity determines, based the qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount. This guidance is effective for annual and interim goodwill tests performed for years beginning after December 15, 2011. Early adoption is permitted. The Company's adoption of ASU 2011-08 is not expected to have an impact on its consolidated results of operations or financial condition.

In December 2011, the FASB issued Accounting Standards Update ("ASU") No. 2011-12, Topic 220 - Comprehensive Income ("ASU 2011-12"), which indefinitely deferred certain provisions of ASU 2011-05, including the requirement to present reclassification adjustments out of accumulated other comprehensive income by component in both the statement in which net income is presented and the statement in which other comprehensive income is presented. This amendment is effective for both annual and interim financial statements beginning after December 15, 2011. The Company's adoption of ASU 2011-12 will not have an impact on its consolidated results of operations or financial condition.

In December 2011, the FASB issued ASU No. 2011-11, Topic 2010 - Balance Sheet ("ASU 2011-11"), which contains new disclosure requirements regarding the nature of an entity's rights of set off and related arrangements associated with its financial instruments and derivative instruments. Under U.S. GAAP, certain derivative and repurchase agreement arrangements are granted exceptions from the general off-setting model. To facilitate comparison between financial statements prepared under U.S. GAAP and IFRS, the new disclosure requirement will provide financial statement users information regarding both gross and net exposures. This guidance is effective for annual and interim financial statements beginning on or after January 1, 2013. Retrospective application is required. The Company does not set off related arrangements associated with its financial instruments and derivative instruments. Its adoption of ASU 2011-11 is not expected to have an impact on its consolidated results of operations or financial condition.
Net Income per Share (Notes)
Earnings Per Share [Text Block]
Net Income per Share

The Company computed basic and diluted net income per share attributable to Juniper Networks common stockholders as follows (in millions, except per share amounts):

 
Years Ended December 31,
 
2011
 
2010
 
2009
Numerator:
 
 
 
 
 
Net income attributable to Juniper Networks
$
425.1

 
$
618.4

 
$
117.0

Denominator:
 
 
 
 
 
Weighted-average shares used to compute basic net income per share
529.8

 
522.4

 
523.6

Dilutive effect of employee stock awards
11.6

 
16.4

 
10.4

Weighted-average shares used to compute diluted net income per share
541.4

 
538.8

 
534.0

Net income per share attributable to Juniper Networks common stockholders:
 
 
 
 
 
Basic
$
0.80

 
$
1.18

 
$
0.22

Diluted
$
0.79

 
$
1.15

 
$
0.22



Basic net income per share is computed using net income available to common stockholders and the weighted-average number of common shares outstanding for the period. Diluted net income per share is computed using net income available to common stockholders and the weighted-average number of common shares outstanding plus potentially dilutive common shares outstanding during the period. Dilutive potential common shares consist of common shares issuable upon exercise of stock options, employee stock purchase plan, vesting of restricted stock units ("RSUs"), and vesting of performance share awards ("PSAs").

The Company excludes both outstanding stock options with exercise prices that are greater than the average market price and RSUs with grant date fair market value that are greater than the average market price from the calculation of diluted net income per share because their effect would be anti-dilutive. The Company includes the common shares underlying PSAs in the calculation of diluted net income per share when they become contingently issuable and excludes such shares when they are not contingently issuable. Potentially dilutive common shares of approximately 17.4 million, 14.0 million, and 38.9 million shares were outstanding but were not included in the computation of diluted earnings per share for the years ended December 31, 2011, 2010, and 2009, respectively.
Cash, Cash Equivalents and Investments (Notes)
Cash, Cash Equivalents, and Marketable Securities [Text Block]
Cash, Cash Equivalents, and Investments

Cash and Cash Equivalents

The following table summarizes the Company's cash and cash equivalents (in millions):

 
As of December 31,
 
2011
 
2010
Cash:
 
 
 
Demand deposits
$
633.7

 
$
413.0

Time deposits
926.0

 
273.3

Total cash
1,559.7

 
686.3

Cash equivalents:
 
 
 
U.S. government securities
—

 
76.7

Government-sponsored enterprise obligations
24.5

 
5.0

Commercial paper
10.0

 
4.0

Money market funds
1,316.2

 
1,039.9

Total cash equivalents
1,350.7

 
1,125.6

Total cash and cash equivalents
$
2,910.4

 
$
1,811.9


Investments in Available-for-Sale and Trading Securities

The following table summarizes unrealized gains and losses related to the Company's investments with stated maturities of greater than three months designated as available-for-sale and trading securities, as of December 31, 2011, and 2010 (in millions):

 
Amortized Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Estimated Fair Value
As of December 31, 2011:
 
 
 
 
 
 
 
Fixed income securities:
 
 
 
 
 
 
 
U.S. government securities
$
301.1

 
$
—

 
$
(0.1
)
 
$
301.0

Government-sponsored enterprise obligations
406.3

 
0.3

 
(0.1
)
 
406.5

Foreign government debt securities
—

 
—

 
—

 
—

Certificates of deposit
31.8

 
—

 
—

 
31.8

Asset-backed securities
124.7

 
0.1

 
(0.1
)
 
124.7

Corporate debt securities
508.2

 
1.0

 
(0.5
)
 
508.7

Total fixed income securities
1,372.1

 
1.4

 
(0.8
)
 
1,372.7

Total available-for-sale securities
1,372.1

 
1.4

 
(0.8
)
 
1,372.7

Trading securities:
 
 
 
 
 
 
 
Mutual funds (1)
9.3

 
—

 
—

 
9.3

Total trading securities
9.3

 
—

 
—

 
9.3

Total
$
1,381.4

 
$
1.4

 
$
(0.8
)
 
$
1,382.0

 
 
 
 
 
 
 
 
Reported as:
 
 
 
 
 
 
 
Short-term investments
$
640.9

 
$
0.4

 
$
—

 
$
641.3

Long-term investments
740.5

 
1.0

 
(0.8
)
 
740.7

Total
$
1,381.4

 
$
1.4

 
$
(0.8
)
 
$
1,382.0

________________________________
(1)
Balance includes the Company's non-qualified deferred compensation plan assets. For additional information, see Note 12, Employee Benefits Plans, under the section Deferred Compensation Plan.

 
Amortized Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Estimated Fair Value
As of December 31, 2010:
 
 
 
 
 
 
 
Fixed income securities:
 
 
 
 
 
 
 
U.S. government securities
$
158.2

 
$
0.2

 
$
—

 
$
158.4

Government-sponsored enterprise obligations
213.8

 
0.4

 
(0.2
)
 
214.0

Foreign government debt securities
46.8

 
0.2

 
—

 
47.0

Certificates of deposit
20.9

 
0.1

 
—

 
21.0

Commercial paper
9.5

 
—

 
—

 
9.5

Asset-backed securities
90.1

 
—

 
(0.1
)
 
90.0

Corporate debt securities
459.7

 
2.2

 
(0.2
)
 
461.7

Total fixed income securities
999.0

 
3.1

 
(0.5
)
 
1,001.6

Total available-for-sale securities
999.0

 
3.1

 
(0.5
)
 
1,001.6

Trading securities:
 
 
 
 
 
 
 
Mutual funds (1)
8.1

 
—

 
—

 
8.1

Total trading securities
8.1

 
—

 
—

 
8.1

Total
$
1,007.1

 
$
3.1

 
$
(0.5
)
 
$
1,009.7

 
 
 
 
 
 
 
 
Reported as:
 
 
 
 
 
 
 
Short-term investments
$
473.6

 
$
0.9

 
$
—

 
$
474.5

Long-term investments
533.5

 
2.2

 
(0.5
)
 
535.2

Total
$
1,007.1

 
$
3.1

 
$
(0.5
)
 
$
1,009.7


 
________________________________
(1)
Balance includes the Company's non-qualified deferred compensation plan assets. For additional information, see Note 12, Employee Benefits Plans, under the section Deferred Compensation Plan.

The following table presents the maturities of the Company's available-for-sale securities, as of December 31, 2011 (in millions):
 
Amortized Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Estimated Fair Value
Due within one year
$
631.6

 
$
0.4

 
$
—

 
$
632.0

Due between one and five years
740.5

 
1.0

 
(0.8
)
 
740.7

Total
$
1,372.1

 
$
1.4

 
$
(0.8
)
 
$
1,372.7



The following tables present the Company's available-for-sale investments that are in an unrealized loss position as of December 31, 2011, and December 31, 2010 (in millions):
 
Less than 12 Months
 
12 Months or Greater
 
Total
 
Fair Value
 
Unrealized Loss
 
Fair Value
 
Unrealized Loss
 
Fair Value
 
Unrealized Loss
As of December 31, 2011
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
$
189.9

 
$
(0.5
)
 
$
—

 
$
—

 
$
189.9

 
$
(0.5
)
U.S. government securities
186.7

 
(0.1
)
 
—

 
—

 
186.7

 
(0.1
)
Government-sponsored enterprise obligations
146.0

 
(0.1
)
 
—

 
—

 
146.0

 
(0.1
)
Asset-backed securities
76.8

 
(0.1
)
 
0.3

*
—

 
77.1

*
(0.1
)
Total
$
599.4

 
$
(0.8
)
 
$
0.3

 
$
—

 
$
599.7

 
$
(0.8
)
________________________________
* Balance includes investments that were in an immaterial unrealized loss position as of December 31, 2011.
 
Less than 12 Months 
 
12 Months or Greater 
 
Total 
 
Fair Value 
 
Unrealized Loss 
 
Fair Value 
 
Unrealized Loss 
 
Fair Value 
 
Unrealized Loss 
As of December 31, 2010
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
$
104.3

 
$
(0.2
)
 
$
28.8

*
$
—

 
$
133.1

*
$
(0.2
)
Government-sponsored enterprise obligations
57.8

 
(0.2
)
 
—

 
—

 
57.8

 
(0.2
)
Foreign government debt securities
—

 
—

 
6.2

*
—

 
6.2

*
—

Commercial paper
5.0

*
—

 
—

 
—

 
5.0

*
—

Asset-backed securities
54.7

 
(0.1
)
 
—

 
—

 
54.7

 
(0.1
)
Total
$
221.8

 
$
(0.5
)
 
$
35.0

 
$
—

 
$
256.8

 
$
(0.5
)
 ________________________________
* Balance includes investments that were in an immaterial unrealized loss position as of December 31, 2010.

There were no material realized gains or losses from the sale of available-for-sale and trading securities in 2011, 2010, and 2009. The Company generated cash proceeds of $1,926.6 million, $1,624.4 million, and $683.8 million from maturities and sales of our available-for-sale investments during 2011, 2010, and 2009, respectively.

The Company had 135 and 73 investments in unrealized loss positions as of December 31, 2011, and December 31, 2010, respectively. The gross unrealized losses related to these investments were primarily due to changes in market interest rates. For the fixed income securities that have unrealized losses, the Company determined that (i) it does not have the intent to sell any of these investments and (ii) it is not more likely than not that it will be required to sell any of these investments before recovery of the entire amortized cost basis. The Company did not consider these investments to be other-than-temporarily impaired as of December 31, 2011, and December 31, 2010. The Company reviews its investments to identify and evaluate investments that have an indication of possible impairment. The Company aggregates its investments by category and length of time the securities have been in a continuous unrealized loss position to facilitate its evaluation.

Restricted Cash and Investments

The Company classifies cash and investments as restricted cash and investments on its consolidated balance sheet for: (i) amounts held in escrow accounts, as required by certain acquisitions; (ii) the India Gratuity Trust and Israel Retirement Trust, which cover statutory severance obligations in the event of termination of the Company's India and Israel employees, respectively; and (iii) the Directors and Officers ("D&O") indemnification trust. During the year ended December 31, 2011, the Company distributed approximately $42.0 million of restricted cash, mainly related to the 2010 acquisitions.
In 2010, the Company increased its restricted cash and cash investments by $261.9 million, primarily for the escrow accounts required by the acquisitions completed in 2010, and to a lesser extent for the Israel Retirement Trust established in the first quarter of 2010. The increases in restricted cash were partially offset by distributions of approximately $196.5 million, mainly related to the 2010 acquisitions.

In connection with the 2010 acquisition of Ankeena Networks, Inc. ("Ankeena"), the Company agreed to pay from escrow a total amount of $10.7 million, representing the cash value of unvested restricted shares of Ankeena common stock as of April 8, 2010, held by certain former Ankeena employees. Through December 31, 2011, the Company has released $9.8 million from escrow and expects to release the remaining $0.9 million from escrow over the next nine months.

The following table summarizes the Company's cash and investments that are classified as restricted cash and investments in the consolidated balance sheets (in millions):
 
As of December 31,
 
2011
 
2010
Restricted cash:
 
 
 
Demand deposits
$
0.6

 
$
1.7

Total restricted cash
0.6

 
1.7

Restricted investments:
 
 
 
U.S. government securities
—

 
0.6

Corporate debt securities
1.6

 
2.7

Mutual funds
1.0

 
—

Money market funds
75.1

 
114.3

Total restricted investments
77.7

 
117.6

Total restricted cash and investments
$
78.3

 
$
119.3



As of December 31, 2011, and 2010, the unrealized gains and losses related to restricted investments were immaterial.

Privately-Held Investments

The Company reviews its investments to identify and evaluate investments that have an indication of possible impairment. The Company adjusts its privately-held equity investments for any impairment if the fair value is less than the carrying value of the respective assets on an other-than-temporary basis.

As of December 31, 2011, and December 31, 2010, the carrying values of the Company’s privately-held and other equity investments of $51.8 million and $22.1 million, respectively, were included in other long-term assets in the consolidated balance sheets. In 2011, 2010, and 2009, the Company invested a total of $33.1 million, $13.3 million, and $7.2 million, respectively, in privately-held equity investments. In 2010, as a result of the acquisitions of Ankeena and Altor Networks, Inc ("Altor"), the Company recognized a gain of $3.2 million and $2.1 million, respectively, from its minority equity investments in those companies.

In the year ended December 31, 2011, the Company recognized a loss of $1.8 million from the impairment of a privately-held investment that the Company judged to be other than temporary, partially offset by gains on other privately-held investments. In 2010, the Company determined there were no impairments to its privately-held equity investments During the year ended December 31, 2009, the Company recognized an impairment loss of $5.5 million on its investments in privately-held companies determined to be other than temporary.
Fair Value Measurements (Notes)
Fair Value Disclosures [Text Block]
Fair Value Measurements

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables provide a summary of assets measured at fair value on a recurring basis and as reported in the consolidated balance sheets (in millions):

 
Fair Value Measurements at December 31, 2011 Using:
 
 
 
Quoted Prices in Active Markets For Identical Assets
 
Significant Other Observable Remaining Inputs
 
Significant Other Unobservable Remaining Inputs
 
 
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Total
Assets measured at fair value:
 
 
 
 
 
 
 
Available-for-sale debt securities:
 
 
 
 
 
 
 
U.S. government securities
$
149.3

 
$
151.7

 
$
—

 
$
301.0

Government-sponsored enterprise obligations
314.2

 
116.8

 
—

 
431.0

Commercial paper
—

 
10.0

 
—

 
10.0

Corporate debt securities (1)
—

 
510.3

 
—

 
510.3

Certificate of deposit
—

 
31.8

 
—

 
31.8

Asset-backed securities
—

 
124.7

 
—

 
124.7

Money market funds (2)
1,391.3

 
—

 
—

 
1,391.3

Total available-for-sale debt securities
1,854.8

 
945.3

 
—

 
2,800.1

Total available-for-sale securities
1,854.8

 
945.3

 
—

 
2,800.1

Trading securities:
 
 
 
 
 
 
 
Mutual funds (3)
10.3

 
—

 
—

 
10.3

Total trading securities
10.3

 
—

 
—

 
10.3

Derivative assets:
 
 
 
 
 
 
 
Foreign exchange contracts
—

 
0.4

 
—

 
0.4

Total derivative assets
—

 
0.4

 
—

 
0.4

Total assets measured at fair value
$
1,865.1

 
$
945.7

 
$
—

 
$
2,810.8

 
 
 
 
 
 
 
 
Liabilities measured at fair value:
 
 
 
 
 
 
 
Derivative liabilities:
 
 
 
 
 
 
 
Foreign exchange contracts
$
—

 
$
(9.6
)
 
$
—

 
$
(9.6
)
Total derivative liabilities
—

 
(9.6
)
 
—

 
(9.6
)
Total liabilities measured at fair value
$
—

 
$
(9.6
)
 
$
—

 
$
(9.6
)
________________________________
(1)
Balance includes $1.6 million of restricted investments measured at fair market value, related to the Company's India Gratuity Trust.
(2)
Balance includes $75.1 million of restricted investments measured at fair market value, related to the Company's D&O trust and acquisition related escrows.
(3)
Balance includes $9.3 million of the Company's non-qualified deferred compensation plan assets and $1.0 million of restricted investments measured at fair market value, related to the Company's India Gratuity Trust.

 
Fair Value Measurements at December 31, 2011 Using:
 
 
 
Quoted Prices in Active Markets For Identical Assets
 
Significant Other Observable Remaining Inputs
 
Significant Other Unobservable Remaining Inputs
 
 
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Total
Total assets measured at fair value, reported as:
 
 
 
 
 
 
 
Cash equivalents
$
1,316.2

 
$
34.5

 
$
—

 
$
1,350.7

Short-term investments
168.9

 
472.4

 
—

 
641.3

Long-term investments
303.9

 
436.8

 
—

 
740.7

Restricted cash and investments
76.1

 
1.6

 
—

 
77.7

Prepaid expenses and other current assets
—

 
0.4

 
—

 
0.4

Total assets measured at fair value
$
1,865.1

 
$
945.7

 
$
—

 
$
2,810.8

Total liabilities measured at fair value, reported as:
 
 
 
 
 
 
 
Other accrued liabilities
$
—

 
$
(9.6
)
 
$
—

 
$
(9.6
)
Total liabilities measured at fair value
$
—

 
$
(9.6
)
 
$
—

 
$
(9.6
)


 
Fair Value Measurements at December 31, 2010 Using:
 
 
 
Quoted Prices in Active Markets For Identical Assets
 
Significant Other Observable Remaining Inputs
 
Significant Other Unobservable Remaining Inputs
 
 
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Total
Assets measured at fair value:
 
 
 
 
 
 
 
Available-for-sale debt securities:
 
 
 
 
 
 
 
U.S. government securities (1)
$
54.9

 
$
180.8

 
$
—

 
$
235.7

Government-sponsored enterprise obligations
208.9

 
10.1

 
—

 
219.0

Foreign government debt securities
21.0

 
26.0

 
—

 
47.0

Commercial paper
—

 
13.5

 
—

 
13.5

Corporate debt securities (2)
2.7

 
461.7

 
—

 
464.4

Certificate of deposit
—

 
21.0

 
—

 
21.0

Asset-backed securities
—

 
90.0

 
—

 
90.0

Money market funds (3)
1,154.2

 
—

 
—

 
1,154.2

Total available-for-sale debt securities
1,441.7

 
803.1

 
—

 
2,244.8

Total available-for-sale securities
1,441.7

 
803.1

 
—

 
2,244.8

Trading securities:
 
 
 
 
 
 
 
Mutual funds
8.1

 
—

 
—

 
8.1

Total trading securities
8.1

 
—

 
—

 
8.1

Derivative assets:
 
 
 
 
 
 
 
Foreign exchange contracts
—

 
0.4

 
—

 
0.4

Total derivative assets
—

 
0.4

 
—

 
0.4

Total assets measured at fair value
$
1,449.8

 
$
803.5

 
$
—

 
$
2,253.3

 
 
 
 
 
 
 
 
Liabilities measured at fair value:
 
 
 
 
 
 
 
Derivative liabilities:
 
 
 
 
 
 
 
Foreign exchange contracts
$
—

 
$
(2.6
)
 
$
—

 
$
(2.6
)
Total derivative liabilities
—

 
(2.6
)
 
—

 
(2.6
)
Total liabilities measured at fair value
$
—

 
$
(2.6
)
 
$
—

 
$
(2.6
)
________________________________
(1)
Balance includes $0.6 million of restricted investments measured at fair market value, related to an acquisition completed in 2005. For additional information regarding the Company's restricted investments, see Note 4, Cash, Cash Equivalents, and Investments, under the heading “Restricted Cash and Investments.” Restricted investments are included in the restricted cash balance in the consolidated balance sheet.
(2)
Balance includes $2.7 million of restricted investments measured at fair market value, related to the Company's India Gratuity Trust.
(3)
Balance includes $114.3 million of restricted investments measured at fair market value, related to the Company's D&O trust and acquisition related escrows.

 
Fair Value Measurements at December 31, 2010 Using:
 
 
 
Quoted Prices in Active Markets For Identical Assets
 
Significant Other Observable Remaining Inputs
 
Significant Other Unobservable Remaining Inputs
 
 
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Total
Total assets measured at fair value, reported as:
 
 
 
 
 
 
 
Cash equivalents
$
1,039.9

 
$
85.7

 
$
—

 
$
1,125.6

Short-term investments
150.7

 
323.8

 
—

 
474.5

Long-term investments
142.2

 
393.0

 
—

 
535.2

Restricted cash
117.0

 
0.6

 
—

 
117.6

Prepaid expenses and other current assets
—

 
0.4

 
—

 
0.4

Total assets measured at fair value
$
1,449.8

 
$
803.5

 
$
—

 
$
2,253.3

Total liabilities measured at fair value, reported as:
 
 
 
 
 
 
 
Other accrued liabilities
$
—

 
$
(2.6
)
 
$
—

 
$
(2.6
)
Total liabilities measured at fair value
$
—

 
$
(2.6
)
 
$
—

 
$
(2.6
)



The Company's policy is to recognize asset or liability transfers among Level 1, Level 2, and Level 3 as of the actual date of the events or change in circumstances that caused the transfer. During the years ended December 31, 2011, and 2010, the Company had no transfers between levels of the fair value hierarchy of its assets or liabilities measured at fair value.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

As of December 31, 2011, and December 31, 2010, the carrying value of privately-held equity investments measured at fair value on a nonrecurring basis was $0.4 million and $0.8 million, respectively. These privately-held equity investments, which are normally carried at cost, were measured at fair value due to events and circumstances that the Company identified as significantly impacting the fair value of the investments. The Company measured the fair value of its privately held equity investments using an analysis of the financial condition and near-term prospects of the investee, including recent financing activities and their capital structure. As a result, the Company recognized an impairment loss of $1.8 million and $5.5 million, in years ended December 31, 2011 and 2009, respectively, and classified the investment as Level 3 assets due to the absence of quoted market prices and inherent lack of liquidity. There were no such charges in the year ended December 31, 2010.

The Company had no liabilities measured at fair value on a nonrecurring basis as of December 31, 2011 and December 31, 2010.

Assets and Liabilities Not Measured at Fair Value

The carrying amounts of the Company's accounts receivable, financing receivables, accounts payable, and other accrued liabilities approximate fair value due to their short maturities. The fair value of the Company’s long-term debt is disclosed in Note 10, Financing, and was determined using quoted market prices (Level 1).
Derivative Instruments (Notes)
Derivative Instruments [Text Block]
Derivative Instruments

The Company uses derivatives to partially offset its market exposure to fluctuations in certain foreign currencies and does not enter into derivatives for speculative or trading purposes.

The notional amount of Company's foreign currency derivatives are summarized as follows (in millions):
 
As of December 31,
 
2011
 
2010
Cash flow hedges
$
184.3

 
$
110.4

Non-designated hedges
122.7

 
74.4

     Total
$
307.0

 
$
184.8



Cash Flow Hedges

The Company uses foreign currency forward contracts to hedge certain forecasted foreign currency transactions relating to cost of services and operating expenses. The derivatives are intended to protect the U.S. Dollar equivalent of the Company's planned cost of services and operating expenses denominated in foreign currencies. These derivatives are designated as cash flow hedges. Execution of these cash flow hedge derivatives typically occurs every month with maturities of one year or less. The effective portion of the derivative's gain or loss is initially reported as a component of accumulated other comprehensive income (loss), and upon occurrence of the forecasted transaction, is subsequently reclassified into the cost of services or operating expense line item to which the hedged transaction relates. The Company records any ineffectiveness of the hedging instruments in other (expense) income, net in its consolidated statements of operations. Cash flows from such hedges are classified as operating activities. All amounts within other comprehensive income (loss) are expected to be reclassified into earnings within the next 12 months.

The total fair value of the Company’s derivative assets located in other current assets on the consolidated balance sheet as of December 31, 2011 and December 31, 2010, was $0.4 million and $0.4 million, respectively. The total fair value of the Company’s derivative liabilities located in other accrued liabilities on the consolidated balance sheet as of December 31, 2011 and December 31, 2010, was $9.6 million and $2.6 million, respectively.

During the year ended December 31, 2011, the Company recognized a loss of $7.9 million in accumulated other comprehensive income for the effective portion of its derivative instruments and reclassified a gain of $0.7 million from other comprehensive income to operating expense in the consolidated statements of operations. During the year ended December 31, 2010, the Company recognized a loss of $3.0 million in accumulated other comprehensive income for the effective portion of its derivative instruments and reclassified a loss of $2.1 million from other comprehensive income to operating expense in the consolidated statements of operations. During the year ended December 31, 2009, the Company recognized a gain of $0.6 million in accumulated other comprehensive income for the effective portion of its derivative instruments and reclassified a gain of $4.2 million from other comprehensive income to operating expense in the consolidated statements of operations.

The ineffective portion of the Company's derivative instruments recognized in its consolidated statements of operations was immaterial during the years ended December 31, 2011, 2010 and 2009.

Non-Designated Hedges

The Company also uses foreign currency forward contracts to mitigate variability in gains and losses generated from the re-measurement of certain monetary assets and liabilities denominated in foreign currencies. These hedges do not qualify for special hedge accounting treatment. These derivatives are carried at fair value with changes recorded in other income and expense, net. Changes in the fair value of these derivatives are largely offset within the consolidated statement of operations by re-measurement of the underlying assets and liabilities. Cash flows from such derivatives are classified as operating activities. The derivatives have maturities of one year or less.

The Company recognized a gain of $1.5 million, a loss of $0.3 million, and a gain of $4.9 million on non-designated derivative instruments within other (expense) income, net, in its consolidated statements of operations during the years ended December 31, 2011, 2010, and 2009, respectively.
Business Combination (Notes)
Business Combination [Text Block]
Business Combinations

The Company's consolidated financial statements include the operating results of acquired businesses from the date of each acquisition. Pro forma results of operations for these acquisitions have not been presented as the financial impact to the Company's consolidated results of operations, both individually and in aggregate, is not material. Additional information existing as of the acquisition dates but unknown to the Company may become known during the remainder of the measurement period, not to exceed 12 months from the acquisition date, which may result in changes to the amounts and allocations recorded.

The Company completed two business combinations in 2011 and four business combinations in 2010 for either cash consideration or cash consideration along with vested share-based awards assumed of approximately $30.5 million and $394.5 million, respectively. There were no acquisitions in 2009. Total purchase consideration for these acquisitions at the acquisition dates was allocated as follows (in millions):
 
Allocation of purchase consideration:
2011 Acquisitions
 
2010 Acquisitions
Net tangible assets acquired
$
1.7

 
$
8.8

Intangible assets acquired
28.4

 
116.5

Goodwill
0.4

 
269.2

    Total
$
30.5

 
$
394.5



The Company recognized $9.6 million and $6.3 million of acquisition-related costs in the years ended December 31, 2011 and 2010, respectively. These acquisition related charges were expensed in the period incurred and reported in the Company's consolidated statement of operations within cost of revenues and operating expense.

The goodwill recognized for the 2011 acquisitions is attributable primarily to expected synergies. None of the goodwill is deductible for U.S. federal income tax purposes for acquisitions completed in 2011. Approximately $88.9 million of the acquired goodwill from a 2010 acquisition is deductible for income tax purposes.

Fiscal 2011 Acquisitions
On February 9, 2011, the Company acquired certain IP assets of OpNext for $26.0 million in cash, which was accounted for as a business combination. The acquisition of OpNext's ASIC technology is expected to help further Juniper's next-generation development of converged packet optical solutions for the Company's service provider customers. In connection with this acquisition, the Company acquired net assets of $25.7 million, and recognized goodwill of $0.3 million, which was assigned to the Company's Infrastructure segment.
On February 18, 2011, the Company acquired certain assets, including all the intellectual property ("IP"), of Brilliant, a supplier of next-generation packet-based, network synchronization equipment and monitoring solutions, for $4.5 million in cash. This IP is expected to assist the Company in extending its market position by delivering solutions that offer greater flexibility for service providers as they continue to deploy 3G and 4G networks. In connection with this acquisition, the Company acquired net assets of $4.4 million, and recognized goodwill of $0.1 million, which was assigned to the Company's Infrastructure segment.
Fiscal 2010 Acquisitions

In 2010, the Company completed the acquisitions of Ankeena, SMobile Systems, Inc. (“SMobile”), Altor, and Trapeze Networks ("Trapeze").

Total purchase consideration for these acquisitions is summarized as follows (in millions):
 
Ankeena
 
SMobile
 
Altor
 
Trapeze
 
Total
Net cash
$
66.5

 
$
69.5

 
$
104.0

 
$
152.1

 
$
392.1

Assumed stock option and RSU awards allocated to purchase price (1)
2.4

 
—

 
—

 
—

 
2.4

Total
$
68.9

 
$
69.5

 
$
104.0

 
$
152.1

 
$
394.5

________________________________

(1)
The fair value of the stock option and RSU awards assumed was based on the acquired company's determined value on the acquisition date.

Ankeena Acquisition

On April 19, 2010, the Company acquired 100% of the equity securities of Ankeena, a privately-held provider of new media infrastructure technology. In connection with the acquisition of Ankeena, the Company acquired net assets of $3.6 million, including cash and cash equivalents of $2.3 million, and recognized goodwill of $53.1 million, which was assigned to the Company's Infrastructure segment.

Prior to the acquisition, the Company had a $2.0 million, or a 7.7% ownership interest in Ankeena, and accounted for it as a privately-held equity investment. As of the acquisition-date, the fair value of the equity interest in Ankeena was $5.2 million based on a noncontrolling interest fair value and was included in the purchase price. The Company recognized a $3.2 million gain, which was reported within gain (loss) on equity investments in its consolidated statement of operations.

SMobile Acquisition

On July 30, 2010, the Company acquired 100% of the equity securities of SMobile, a privately-held software company focused solely on smartphone and tablet security solutions for the enterprise, service provider, and consumer markets. In connection with the acquisition of SMobile, the Company assumed net liabilities of $5.2 million, including cash and cash equivalents of $0.4 million, and recognized goodwill of $48.1 million, which was assigned to the Company's Service Layer Technology ("SLT") segment.

Altor Acquisition

On December 6, 2010, the Company acquired 100% of the equity securities of Altor, a privately-held provider of virtualization security. In connection with the acquisition of Altor, the Company acquired net assets of $4.5 million, including cash and cash equivalents of $6.4 million, and recognized goodwill of $78.2 million, which was assigned to the Company's SLT segment.

Prior to the acquisition, the Company had a $2.0 million, or a 5.0% ownership interest in Altor, accounted for as a privately-held equity investment. As of the acquisition-date, the fair value of the equity interest in Altor was $4.1 million based on a noncontrolling interest fair value and was included in the purchase price. The Company recognized a $2.1 million gain, which was reported within gain (loss) on equity investments in its consolidated statement of operations.

Trapeze Acquisition

On December 16, 2010, the Company acquired 100% of the equity securities of Trapeze, a subsidiary of Belden Inc. and a provider of enterprise wireless local area network ("WLAN") solutions. In connection with the acquisition of Trapeze, the Company acquired net assets of $5.9 million, including cash and cash equivalents of $0.8 million, and recognized goodwill of $89.8 million, which was assigned to the Company's Infrastructure segment.

Intangible Assets Acquired

The following table presents details of the intangible assets acquired through the business combinations completed in 2011, as of December 31, 2011 (in millions, except years):  
 
2011 Acquisitions
 
Estimated Useful Life (In Years)
Amount
Existing or Core technology
10
$
21.9

Support agreements and related relationships
4
5.1

Patents
5
1.4

Total
 
$
28.4


The following table presents details of the intangible assets acquired through the business combinations completed during 2010, as of December 31, 2011 (in millions, except years):
 
2010 Acquisitions
 
Ankeena
 
SMobile
 
Altor
 
Trapeze
 
 
 
Estimated Useful Life (In Years)
 
Amount
 
Estimated Useful Life (In Years)
 
Amount
 
Estimated Useful Life (In Years)
 
Amount
 
Estimated Useful Life (In Years)
 
Amount
 
Total Amount
Existing technology
4.0

 
$
9.0

 
5.0

 
$
24.3

 
6.0

 
$
13.9

 
5.0

 
$
45.0

 
$
92.2

In-process research and development
—

 
—

 
—

 
—

 
—

 
2.8

 
—

 
—

 
2.8

Core technology
4.0

 
3.2

 
—

 
—

 
6.0

 
4.6

 
—

 
—

 
7.8

Customer contracts and related relationships
—

 
—

 
6.0

 
2.1

 
—

 
—

 
7.0

 
8.6

 
10.7

Support agreements and related relationships
—

 
—

 
6.0

 
0.1

 
—

 
—

 
7.0

 
2.6

 
2.7

Non-compete agreements
—

 
—

 
2.0

 
0.1

 
—

 
—

 
—

 
—

 
0.1

OEM customer contracts
—

 
—

 
—

 
—

 
—

 
—

 
2.0

 
0.2

 
0.2

Total
 
 
$
12.2

 
 
 
$
26.6

 
 
 
$
21.3

 
 
 
$
56.4

 
$
116.5



Acquired in-process research and development (“IPR&D”) consists of existing research and development projects at the time of the acquisition. Projects that qualify as IPR&D assets represent those that have not yet reached technological feasibility and have no alternative future use. After initial recognition, acquired IPR&D assets are accounted for as indefinite-lived intangible assets. Development costs incurred after acquisition on acquired development projects are expensed as incurred. Upon completion of development, acquired IPR&D assets are considered amortizable intangible assets. If the IPR&D project is abandoned, the Company writes off the related purchased intangible asset in the period it is abandoned.
Goodwill and Purchased Intangible Assets (Notes)
Goodwill and purchased intangible assets [Text Block]
Goodwill and Purchased Intangible Assets

Goodwill

The following table summarizes the Company's goodwill activities by segment (in millions):

 
Infrastructure
 
SLT
 
Total
December 31, 2009
$
1,500.5

 
$
2,158.1

 
$
3,658.6

Adjustment to goodwill
—

 
0.2

 
0.2

Additions due to business combinations
142.9

 
126.1

 
269.0

December 31, 2010
1,643.4

 
2,284.4

 
3,927.8

Adjustments to goodwill
1.7

 
(1.8
)
 
(0.1
)
Additions due to business combinations
0.4

 
—

 
0.4

December 31, 2011
$
1,645.5

 
$
2,282.6

 
$
3,928.1



The adjustments to goodwill during the year ended December 31, 2011, were related to adjustments in net tangible assets assumed from certain businesses acquired in 2010 and 2011. There were no impairments to goodwill during the years ended December 31, 2011, 2010 and 2009. As of December 31, 2011, accumulated impairment losses were $1,280.0 million, all of which were associated with the SLT segment.
 
Purchased Intangible Assets

Changes to the Company’s purchased intangible assets were as follows (in millions):
 
Gross
 
Accumulated Amortization
 
Net
As of December 31, 2011:
 
 
 
 
 
Intangible assets with finite lives:
 
 
 
 
 
Technologies and patents
$
499.5

 
$
(404.2
)
 
$
95.3

Other
91.5

 
(66.5
)
 
25.0

Total intangible assets with finite lives
591.0

 
(470.7
)
 
120.3

IPR&D with indefinite lives
2.8

 
—

 
2.8

Total purchased intangible assets
$
593.8

 
$
(470.7
)
 
$
123.1

 
 
 
 
 
 
As of December 31, 2010:
 
 
 
 
 
Intangible assets with finite lives:
 
 
 
 
 
Technologies and patents
$
471.1

 
$
(381.4
)
 
$
89.7

Other
86.4

 
(62.2
)
 
24.2

Total intangible assets with finite lives
557.5

 
(443.6
)
 
113.9

IPR&D with indefinite lives
7.9

 
—

 
7.9

Total purchased intangible assets
$
565.4

 
$
(443.6
)
 
$
121.8



During the year ended December 31, 2011, the Company added $28.4 million of purchased intangible assets as a result of acquisitions completed during 2011. During the year ended December 31, 2010, the Company added $116.5 million, of purchased intangible assets as a result of acquisitions completed during 2010. Amortization of purchased intangible assets included in operating expenses and cost of product revenues totaled $27.1 million, $8.6 million and $15.4 million for the years ended December 31, 2011, 2010 and 2009, respectively.

The estimated future amortization expense of purchased intangible assets with finite lives is as follows (in millions):
Years Ending December 31,
 
Amount
2012
 
$
27.4

2013
 
27.2

2014
 
25.3

2015
 
20.4

2016
 
7.7

Thereafter
 
12.3

Total
 
$
120.3

Other Financial Information (Notes)
Other Financial Information [Text Block]
Other Financial Information

Inventories, net

The Company's inventories are stated at the lower of standard cost or market, which approximates actual cost. Inventories, net are reported within prepaid expenses and other current assets on the consolidated balance sheet and consist of the following (in millions):
 
As of December 31,
 
2011
 
2010
Inventories, net
 
 
 
Production materials
$
52.4

 
$
5.8

Finished goods
16.7

 
15.8

Total inventories, net
$
69.1

 
$
21.6



Property and Equipment
 
Property and equipment consist of the following (in millions):
 
As of December 31,
 
2011
 
2010
Computers and equipment
$
604.6

 
$
514.3

Software
110.2

 
101.6

Leasehold improvements
204.1

 
179.0

Furniture and fixtures
27.4

 
24.9

Building and building improvements
6.2

 
—

Land and land improvements
208.2

 
203.7

Construction-in-process
99.7

 
41.9

Property and equipment, gross
1,260.4

 
1,065.4

Accumulated depreciation
(661.8
)
 
(571.5
)
Property and equipment, net
$
598.6

 
$
493.9


 
Depreciation expense was $142.2 million, $146.8 million, and $133.0 million in 2011, 2010, and 2009, respectively. In 2011, the Company recorded a $13.5 million asset impairment charge in restructuring and other charges on the consolidated statement of operations related to an abandoned in-process internal use software project.

Deferred Revenue

Details of the Company's deferred revenue were as follows (in millions):
 
As of December 31,
 
2011
 
2010
Deferred product revenue:
 
 
 
Undelivered product commitments and other product deferrals
$
288.1

 
$
294.1

Distributor inventory and other sell-through items
134.0

 
143.4

Deferred gross product revenue
422.1

 
437.5

Deferred cost of product revenue
(136.9
)
 
(148.8
)
Deferred product revenue, net
285.2

 
288.7

Deferred service revenue
681.8

 
595.7

Total
$
967.0

 
$
884.4

Reported as:
 
 
 
Current
$
712.6

 
$
660.2

Long-term
254.4

 
224.2

Total deferred revenue
$
967.0

 
$
884.4



Deferred product revenue primarily represents unrecognized revenue related to shipments to distributors that have not sold through to end-users, undelivered product commitments, and other shipments that have not met all revenue recognition criteria. Deferred product revenue is recorded net of the related costs of product revenue. Deferred service revenue represents customer payments made in advance for services, which include technical support, hardware and software maintenance, professional services, and training.

Warranties

The Company accrues for warranty costs as part of its cost of sales based on associated material costs, labor costs for customer support, and overhead at the time revenue is recognized. This provision is reported as accrued warranty within other current liabilities on the consolidated balance sheets. Changes in the Company’s warranty reserve were as follows (in millions):
 
As of December 31,
 
2011
 
2010
Beginning balance
$
35.9

 
$
38.2

Provisions made during the period, net
52.5

 
49.9

Change in estimate
(12.6
)
 
(3.0
)
Actual costs incurred during the period
(47.5
)
 
(49.2
)
Ending balance
$
28.3

 
$
35.9



Restructuring Liabilities

In the third quarter of 2011, the Company implemented a restructuring plan (the "2011 Restructuring Plan") in an effort to better align its business operations with the current market and macroeconomic conditions. The 2011 Restructuring Plan primarily consisted of certain workforce reductions, and to a lesser extent, contract terminations.

During 2009, the Company implemented a restructuring plan (the "2009 Restructuring Plan") in an effort to better align its business operations with the market and macroeconomic conditions. The 2009 Restructuring Plan included restructuring of certain business functions that resulted in reductions of workforce and facilities. The Company recorded the majority of the restructuring charges associated with this plan during the years ended 2010 and 2009.

The Company recorded net restructuring charges of $17.1 million in the year ended December 31, 2011, primarily due to the implementation of its 2011 Restructuring Plan, and recorded $10.8 million and $19.5 million in restructuring charges during the years ended December 31, 2010, and 2009, respectively, associated with the 2009 Restructuring Plan. As of December 31, 2011, remaining restructuring liability under the 2011 Restructuring Plan was related to severance costs to be paid out in the first half of 2012, as well as facilities related charges under the 2009 Restructuring Plan, which is expected to be completed through February 2015.

Restructuring charges were based on the Company's restructuring plans that were committed by management. Any changes in the estimates of executing the approved plans will be reflected in the Company's results of operations. The following tables provide a summary of changes in the Company’s restructuring liability, which is reported in current and long-term liabilities on its consolidated balance sheets, for 2011 and 2010 (in millions):
 
Remaining Liability as of
December 31, 2010
 
Charges
 
Cash payments
 
Non-cash Settlements and Other Adjustments
 
Remaining Liability as of
December 31, 2011
Facilities
$
7.7

 
$
0.2

 
$
(5.3
)
 
$
(1.6
)
 
$
1.0

Severance, contractual commitments, and other charges
0.2

 
16.9

 
(13.3
)
 
(0.7
)
 
3.1

Total
$
7.9

 
$
17.1

 
$
(18.6
)
 
$
(2.3
)
 
$
4.1



 
Remaining Liability as of
December 31, 2009
 
Charges
 
Cash payments
 
Non-cash Settlements and Other Adjustments
 
Remaining Liability as of
December 31, 2010
Facilities
$
4.9

 
$
6.9

 
$
(2.5
)
 
$
(1.6
)
 
$
7.7

Severance, contractual commitments, and other charges
4.5

 
3.9

 
(5.5
)
 
(2.7
)
 
0.2

Total
$
9.4

 
$
10.8

 
$
(8.0
)
 
$
(4.3
)
 
$
7.9



Other Expense and Income, Net

Other expense and income, net consists of the following (in millions):
 
Years Ended December 31,
 
2011
 
2010
 
2009
Interest income
$
9.7

 
$
10.5

 
$
11.8

Interest expense
(49.5
)
 
(8.7
)
 
(6.0
)
Other income and expense, net
(7.0
)
 
8.8

 
(4.6
)
Other (expense) income, net
$
(46.8
)
 
$
10.6

 
$
1.4



Interest income primarily includes interest earned on the Company’s cash, cash equivalents, and investments. Interest expense primarily includes interest expense from long-term debt and customer financing arrangements. Other income and expense typically consists of investment and foreign exchange gains and losses and other non-operational income and expense items.

In 2011, the Company recognized $37.7 million in interest expense in connection with its long-term debt issued in March 2011. In 2011, other income and expense, net, included certain legal expenses unrelated to current or recent operations of approximately $7.0 million. In 2010, the Company recognized a total gain of $8.7 million, primarily due to acquisitions of its privately-held equity investments in Ankeena and Altor. During 2009, the Company recognized an impairment loss of $5.6 million on its equity investments for changes in fair value that the Company believed were other-than-temporary.
Financing (Notes)
Debt Disclosure [Text Block]
Financing

Long-Term Debt

In March 2011, the Company issued $300.0 million aggregate principal amount of 3.10% senior notes due 2016 ("2016 Notes"), $300.0 million aggregate principal amount of 4.60% senior notes due 2021 ("2021 Notes"), and $400.0 million aggregate principal amount of 5.95% senior notes due 2041 ("2041 Notes" and, together with the 2016 Notes and the 2021 Notes, the "Notes"). Interest on the Notes is payable in cash semiannually. The Company may redeem the Notes, at any time in whole or from time to time in part, subject to a make-whole premium, and, in the event of a change in control, the holders of the Notes may require the Company to repurchase for cash all or part of the Notes at a purchase price equal to 101% of the aggregate principle amount, plus accrued and unpaid interest, if any. The indenture that governs the Notes also contains various covenants, including limitations on the Company's ability to incur liens or enter into sale-leaseback transactions over certain dollar thresholds.

The following table summarizes the Company's long-term debt entered into in 2011 (in millions, except percentages):
 
As of
 
December 31, 2011
 
Amount
 
Effective Interest Rate
3.10% fixed-rate Notes, due 2016
$
300.0

 
3.12
%
4.60% fixed-rate Notes, due 2021
300.0

 
4.63
%
5.95% fixed-rate Notes, due 2041
400.0

 
6.01
%
Total Notes
1,000.0

 
 
Unaccreted discount
(1.0
)
 
 
Total long-term debt
$
999.0

 
 


The effective rates for the Notes include the interest on the Notes, accretion of the discount, and amortization of issuance costs. At December 31, 2011, the estimated fair value of the Notes included in long-term debt was approximately $1,069.8 million based on quoted market prices (Level 1).
 
Customer Financing Arrangements

The Company has customer financing arrangements to sell its accounts receivable to a major third-party financing provider. The program does not and is not intended to affect the timing of revenue recognition because the Company only recognizes revenue upon sell-through. Under the financing arrangements, proceeds from the financing provider are due to the Company 30 days from the sale of the receivable. In these transactions with the financing provider, the Company surrendered control over the transferred assets. The accounts receivable were isolated from the Company and put beyond the reach of creditors, even in the event of bankruptcy. The Company does not maintain effective control over the transferred assets through obligations or rights to redeem, transfer, or repurchase the receivables after they have been transferred.

Pursuant to the financing arrangements for the sale of receivables, the Company sold net receivables of $738.2 million, $637.5 million and $449.8 million during the years ended December 31, 2011, 2010 and 2009, respectively. The Company received cash proceeds from the financing provider of $686.5 million, $595.7 million and $426.3 million during the years ended December 31, 2011, 2010 and 2009, respectively. The amounts owed by the financing provider recorded as accounts receivable on the Company’s consolidated balance sheets as of December 31, 2011, and December 31, 2010, were $162.9 million and $127.4 million, respectively.

The portion of the receivable financed that has not been recognized as revenue is accounted for as a financing arrangement and is included in other accrued liabilities and other long-term liabilities in the consolidated balance sheet. As of December 31, 2011 and December 31, 2010, the estimated cash received from the financing provider not recognized as revenue from distributors was $33.3 million and $49.1 million, respectively.
Equity (Notes)
Equity [Text Block]
Equity

Stock Repurchase Activities

In February 2010, the Company’s Board of Directors (the “Board”) approved a stock repurchase program (the “2010 Stock Repurchase Program”) which authorized the Company to repurchase up to $1.0 billion of its common stock. This authorization was in addition to the stock repurchase program approved by the Board in March 2008 (the “2008 Stock Repurchase Program”), which also enabled the Company to repurchase up to $1.0 billion of the Company’s common stock.

The Company repurchased and retired approximately 17.5 million shares of its common stock at an average price of $30.93 per share for an aggregate purchase price of $541.2 million during year ended December 31, 2011 under its 2010 Stock Repurchase Program. The Company repurchased approximately 19.7 million shares of its common stock at an average price of $28.67 per share for a total purchase price of $563.5 million in the year ended December 31, 2010 under the two stock repurchase programs. There are no remaining authorized funds under the 2008 Stock Repurchase Program and $213.8 million remaining authorized funds under the 2010 Stock Repurchase Program as of December 31, 2011.

In addition to repurchases under the Company’s stock repurchase programs, there were also broker-transacted repurchases of common stock from the Company's employees in connection with net issuance of shares to satisfy tax withholding obligations for the vesting of certain RSUs and PSAs. There were broker-transacted repurchases of approximately 0.2 million shares of common stock at an average price of $35.98 per share for an aggregate purchase price of $7.4 million in connection with the net issuances during the year ended December 31, 2011. There were broker-transacted repurchases of approximately 0.1 million shares of common stock at an average price of $25.75 per share for an aggregate purchase price of $1.9 million in connection with the net issuances during the year ended December 31, 2010.
 
All shares of common stock repurchased under the Company’s 2008 and 2010 stock repurchase programs and from its employees in connection with net issuances have been retired. Future share repurchases under the Company’s 2010 Stock Repurchase Program will be subject to a review of the circumstances in place at that time and will be made from time to time in private transactions or open market purchases as permitted by securities laws and other legal requirements. This program may be discontinued at any time. See Note 17, Subsequent Events, for discussion of the Company's stock repurchase activity in 2012.


Comprehensive Income Attributable to Juniper Networks

Comprehensive income attributable to Juniper Networks consists of the following (in millions):

 
Years Ended December 31,
 
2011
 
2010
 
2009
Consolidated net income
$
425.0

 
$
619.4

 
$
115.2

Other comprehensive income (loss), net:
 
 
 
 
 
Change in unrealized gain (loss) on investments, net
(9.9
)
 
(0.3
)
 
(2.8
)
Change in foreign currency translation adjustment, net
(6.4
)
 
0.5

 
5.6

Total other comprehensive income (loss), net
(16.3
)
 
0.2

 
2.8

Consolidated comprehensive income
408.7

 
619.6

 
118.0

Adjust for comprehensive loss (income) attributable to noncontrolling interest, net
0.1

 
(1.0
)
 
1.8

Comprehensive income attributable to Juniper Networks
$
408.8

 
$
618.6

 
$
119.8

Employee Benefit Plans (Notes)
Employee Benefit Plans [Text Block]
Employee Benefit Plans

Share-Based Compensation Plans

The Company’s share-based compensation plans include the 2006 Equity Incentive Plan (the “2006 Plan”), the 2000 Nonstatutory Stock Option Plan (the “2000 Plan”), the Amended and Restated 1996 Stock Plan (the “1996 Plan”), various equity incentive plans assumed through acquisitions, the 2008 Employee Stock Purchase Plan (the “2008 Purchase Plan”), and the 1999 Employee Stock Purchase Plan ("1999 Purchase Plan"). Under these plans, the Company has granted (or in the case of acquired plans, assumed) stock options, RSUs, and PSAs.

As of December 31, 2011, a total of approximately 105.2 million shares of common stock were reserved for future issuance upon exercise of stock options and for the future grant of share-based compensation awards under the Company's equity incentive plans and the 2008 Purchase Plan.

The 2006 Plan, adopted and approved by the Company’s stockholders in May 2006, had an initial authorized share reserve of 64.5 million shares of common stock plus the addition of any shares subject to options under the 2000 Plan and the 1996 Plan that were outstanding as of May 18, 2006, and that subsequently expire unexercised, up to a maximum of an additional 75.0 million shares. In the second quarters of 2011 and 2010, the Company’s stockholders’ approved amendments to the 2006 Plan that increased the number of shares reserved for issuance thereby increasing the authorized share reserve by 30.0 million shares in May 2011 and 2010. As of December 31, 2011, the 2006 Plan had 58.2 million shares subject to currently outstanding equity awards and 41.1 million shares available for future issuance. Options granted under the 2006 Plan have a maximum term of seven years from the grant date, and generally vest and become exercisable over a four-year period. Subject to the terms of change of control severance agreements, and except for a limited number of shares allowed under the 2006 Plan, RSUs or PSAs that vest solely based on continuing employment or provision of services will vest in full no earlier than three years from the grant date, or in the event vesting is based on factors other than continued future provision of services, such awards will vest in full no earlier than one year from the grant date.

In connection with past acquisitions, the Company assumed stock option and RSU awards under the stock plans of the acquired companies. The Company exchanged those awards for Juniper Networks' stock options and RSUs. As of December 31, 2011, stock options and RSUs covering approximately 1.4 million shares of common stock were outstanding under awards assumed through the Company's past acquisitions.

The Company adopted the 2008 Purchase Plan, in May 2008, which replaced the 1999 Purchase Plan. The Board reserves an aggregate of 12.0 million shares of the Company's common stock for issuance under this plan. The 2008 Purchase Plan is generally similar to the 1999 Purchase Plan, except that under the 2008 Purchase Plan, any increases to the number of shares reserved for issuance must be approved by the Company's stockholders. The 2008 Purchase Plan permits eligible employees to acquire shares of the Company’s common stock at a 15% discount to the offering price (as determined in the 2008 Purchase Plan) through periodic payroll deductions of up to 10% of base compensation, subject to individual purchase limits of 6,000 shares in any twelve-month period or $25,000 worth of stock, determined at the fair market value of the shares at the time the stock purchase option is granted, in one calendar year.

In December 2005, the Board amended the Juniper Networks 1999 Employee Stock Purchase Plan that was approved by the Board in April 1999. Under the 1999 Purchase Plan, the Board authorized a maximum number of 12.0 million shares, plus an annual increase to be added on the first day of the Company's fiscal year beginning in 2000 equal to the lesser of (1) 3.0 million shares or (2) 1% of the outstanding shares on such date or (3) a lesser amount determined by the Board. The 1999 Purchase Plan permits eligible employees to acquire shares of the Company's common stock through periodic payroll deductions of up to 10% of base compensation.


Stock Option Activities

Since 2006, the Company has granted stock option awards that have a maximum contractual life of seven years from the date of grant. Prior to 2006, stock option awards generally had a ten-year contractual life from the date of grant. The following table summarizes the Company’s stock option activity and related information as of and for the three years ended December 31, 2011 (in millions, except for per share amounts and years):

 
Outstanding Options
 
Number of Shares
 
Weighted Average
Exercise Price per Share
 
Weighted Average Remaining Contractual Term (In Years)
 
Aggregate Intrinsic Value
Balance at December 31, 2008
73.6

 
$
21.24

 
 
 
 
Options granted
9.9

 
17.86

 
 
 
 
Options canceled
(2.3
)
 
21.57

 
 
 
 
Options exercised
(8.6
)
 
14.59

 
 
 
 
Options expired
(5.2
)
 
34.91

 
 
 
 
Balance at December 31, 2009
67.4

 
20.84

 
4.6

 
$
451.2

Options granted
6.2

 
29.15

 
 
 
 
Options assumed (1)
0.5

 
31.65

 
 
 
 
Options canceled
(2.3
)
 
22.03

 
 
 
 
Options exercised
(21.6
)
 
18.99

 
 
 
 
Options expired
(0.8
)
 
61.48

 
 
 
 
Balance at December 31, 2010
49.4

 
21.90

 
4.1

 
$
744.5

Options granted
5.6

 
37.17

 
 
 
 
Options canceled
(1.9
)
 
26.76

 
 
 
 
Options exercised
(13.9
)
 
21.13

 
 
 
 
Options expired
(0.6
)
 
34.32

 
 
 
 
Balance at December 31, 2011
38.6

 
$
23.98

 
3.7

 
$
75.3

 
 
 
 
 
 
 
 
As of December 31, 2011:
 
 
 
 
 
 
 
Vested or expected-to-vest options
36.9

 
$
23.66

 
3.7

 
$
74.2

Exercisable options
26.1

 
$
21.51

 
3.0

 
$
61.7


(1)
Stock options assumed in connection with the acquisition of Ankeena and Altor.

Aggregate intrinsic value represents the difference between the Company’s closing stock price on the last trading day of the period, which was $20.41 per share as of December 31, 2011 and the exercise price multiplied by the number of related options. The pre-tax intrinsic value of options exercised, representing the difference between the fair market value of the Company’s common stock on the date of the exercise and the exercise price of each option, was $249.8 million, $260.3 million, and $83.6 million for 2011, 2010, and 2009, respectively. Total fair value of options vested during 2011, 2010, and 2009 was $80.7 million, $83.2 million, and $88.9 million, respectively.

The following table summarizes information about stock options outstanding under all option plans as of December 31, 2011:
 
 
 
Options Outstanding 
 
Options Exercisable 
Range of Exercise Price 
 
Number Outstanding 
 
Weighted-Average Remaining Contractual Life 
 
Weighted-Average Exercise Price 
 
Number Exercisable 
 
Weighted-Average Exercise Price 
 
 
(In millions) 
 
(In years) 
 
(In dollars) 
 
(In millions) 
 
(In dollars) 
$0.33 - $14.91
 
4.3

 
2.2

 
$
10.84

 
3.7

 
$
10.45

$15.00 - $15.09
 
4.0

 
3.5

 
15.07

 
2.7

 
15.06

$15.32 - $18.96
 
4.4

 
2.5

 
17.69

 
3.9

 
17.78

$19.45 - $22.74
 
4.0

 
3.8

 
21.27

 
2.7

 
21.36

$22.97 - $25.16
 
5.7

 
3.1

 
24.47

 
5.3

 
24.44

$25.19 - $26.90
 
4.6

 
3.9

 
26.33

 
3.2

 
26.35

$26.97 - $29.89
 
4.9

 
4.8

 
28.58

 
2.5

 
28.46

$29.93 - $38.93
 
3.2

 
4.3

 
33.35

 
2.1

 
32.77

$40.26 - $44.00
 
3.5

 
6.2

 
41.87

 
—

 
—


 
38.6

 
3.7

 
$
23.98

 
26.1

 
$
21.51


 
As of December 31, 2011, approximately 26.1 million shares of common stock were exercisable at an average exercise price of $21.51 per share. As of December 31, 2010, approximately 32.1 million shares of common stock were exercisable at a weighted-average exercise price of $20.96 per share.

Restricted Stock Units and Performance Share Awards Activities

RSUs generally vest over a period of three to four years from the date of grant, and PSAs generally vest over three years provided that certain annual performance targets and other vesting criteria are met. Until vested, RSUs and PSAs do not have the voting and dividend participation rights of common stock and the shares underlying the awards are not considered issued and outstanding.

The following table summarizes the Company’s RSU and PSA activity and related information as of and for the three years ended December 31, 2011 (in millions, except per share amounts and years):

 
Outstanding RSUs and PSAs
 
Number of Shares
 
Weighted Average Grant-Date Fair Value per Share
 
Weighted Average Remaining Contractual Term (In Years)
 
Aggregate Intrinsic Value
Balance at January 1, 2009
6.7

 
$
24.59

 
 
 
 
RSUs granted
1.8

 
$
17.87

 
 
 
 
PSAs granted
2.9

 
$
18.05

 
 
 
 
RSUs vested
(1.3
)
 
$
21.05

 
 
 
 
PSAs vested
(0.1
)
 
$
26.90

 
 
 
 
RSUs canceled
(0.7
)
 
$
24.67

 
 
 
 
     PSAs canceled
(0.2
)
 
$
19.12

 
 
 
 
Balance at December 31, 2009
9.1

 
$
21.76

 
1.6

 
$
243.3

RSUs granted
4.0

 
$
30.19

 
 
 
 
RSUs assumed (1)
0.5

 
$
32.09

 
 
 
 
PSAs granted
3.8

 
$
29.25

 
 
 
 
RSUs vested
(1.8
)
 
$
25.30

 
 
 
 
PSAs vested
(0.4
)
 
$
20.64

 
 
 
 
RSUs canceled
(0.6
)
 
$
24.87

 
 
 
 
     PSAs canceled
(0.4
)
 
$
22.57

 
 
 
 
Balance at December 31, 2010
14.2

 
$
25.94

 
1.7

 
$
522.9

RSUs granted
7.3

 
$
31.75

 
 
 
 
PSAs granted (2)
4.5

 
$
38.64

 
 
 
 
RSUs vested
(1.7
)
 
$
23.26

 
 
 
 
PSAs vested
(0.8
)
 
$
24.76

 
 
 
 
RSUs canceled
(1.0
)
 
$
31.57

 
 
 
 
     PSAs canceled
(2.9
)
 
$
30.72

 
 
 
 
Balance at December 31, 2011
19.6

 
$
30.27

 
1.5

 
$
400.5

 
 
 
 
 
 
 
 
As of December 31, 2011:
 
 
 
 
 
 
 
Vested and expected-to-vest RSUs and PSAs
16.7

 
$
29.97

 
1.3

 
$
341.0

________________________________
(1)
RSUs assumed in connection with the acquisitions of Ankeena and Altor.
(2)
The number of shares subject to PSAs granted represents the aggregate maximum number of shares that may be issued pursuant to the award over its full term. The aggregate number of shares subject to these PSAs that would be issued if performance goals determined by the Compensation Committee are achieved is estimated at 1.9 million shares. Depending on achievement of such performance goals, the range of shares that could be issued under these awards is 0 to 4.5 million shares.

Shares Available for Grant

The following table presents the stock grant activity and the total number of shares available for grant under the 2006 Plan as of December 31, 2011 (in millions):
 
Number of Shares
Balance at January 1, 2011
30.7

Additional authorized share reserve approved by stockholders
30.0

RSUs and PSAs granted (1)
(24.6
)
Options granted
(5.6
)
RSUs and PSAs canceled (1)
8.1

Options canceled (2)
1.9

Options expired (2)
0.6

Balance at December 31, 2011
41.1

________________________________
(1)
RSUs and PSAs with a per share or unit purchase price lower than 100% of the fair market value of the Company's common stock on the day of the grant under the 2006 Plan are counted against shares authorized under the plan as two and one-tenth shares of common stock for each share subject to such award. The number of shares subject to PSAs granted represents the maximum number of shares that may be issued pursuant to the award over its full term.
(2)
Includes canceled or expired options under the 1996 Plan and the 2000 Plan that expired unexercised after May 18, 2006, which become available for grant under the 2006 Plan according to its terms.

Employee Stock Purchase Plan

The Company's 2008 Purchase Plan is implemented in a series of offering periods, each six months in duration, or a shorter period as determined by the Board. Employees purchased approximately 2.4 million, 2.0 million, and 3.2 million shares of common stock through the 2008 Purchase Plan and 1999 Purchase Plan at an average exercise price of $21.53, $21.20, and $12.16 per share during fiscal years 2011, 2010, and 2009, respectively.

As of December 31, 2011, approximately 6.0 million shares had been issued and 6.0 million shares remained available for future issuance under the 2008 Purchase Plan.

Share-Based Compensation Expense

The weighted-average assumptions used and the resulting estimates of fair value for employee stock options and the employee stock purchase plan during the three years ended December 31, 2011 were:
 
Years Ended December 31,
 
2011
 
2010
 
2009
Employee Stock Options:
 
 
 
 
 
Volatility factor
43%
 
38%
 
50%
Risk-free interest rate
1.5%
 
2.0%
 
1.6%
Expected life (years)
4.1
 
4.3
 
4.2
Dividend yield
—
 
—
 
—
Weighted-average fair value per share
$13.17
 
$9.77
 
$7.41
 
 
 
 
 
 
Employee Stock Purchase Plan:
 
 
 
 
 
Volatility factor
41%
 
35%
 
54%
Risk-free interest rate
0.2%
 
0.2%
 
0.4%
Expected life (years)
0.5
 
0.5
 
0.5
Dividend yield
—
 
—
 
—
Weighted-average fair value per share
$7.48
 
$6.55
 
$5.54


The Company’s share-based compensation expense associated with stock options, employee stock purchases, RSUs, and PSAs is recorded in the following cost and expense categories for the three years ended December 31, 2011 (in millions):

 
Years Ended December 31,
 
2011
 
2010
 
2009
Cost of revenues - Product
$
4.6

 
$
4.4

 
$
3.9

Cost of revenues - Service
15.7

 
13.5

 
10.5

Research and development
97.7

 
78.5

 
59.3

Sales and marketing
70.9

 
54.9

 
43.1

General and administrative
33.3

 
30.7

 
22.9

Total
$
222.2

 
$
182.0

 
$
139.7



The following table summarizes share-based compensation expense by award type (in millions):

 
Years Ended December 31,
 
2011
 
2010
 
2009
Options
$
76.2

 
$
81.5

 
$
81.2

Assumed options
—

 
0.8

 
—

RSUs and PSAs
123.1

 
81.8

 
44.1

Assumed RSUs
—

 
0.6

 
—

Employee stock purchase plan
18.5

 
13.1

 
14.4

Other acquisition-related compensation
4.4

 
4.2

 
—

Total
$
222.2

 
$
182.0

 
$
139.7



As of December 31, 2011, approximately $94.8 million of unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested stock options will be recognized over a weighted-average period of approximately 2.3 years while approximately $247.4 million of unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested RSUs and PSAs will be recognized over a weighted-average period of approximately 2.1 years.

401(k) Plan

The Company maintains a savings and retirement plan qualified under Section 401(k) of the Internal Revenue Code of 1986, as amended. Employees meeting the eligibility requirements, as defined, may contribute up to the statutory limits of the year. The Company has matched employee contributions since January 1, 2001, currently matching 25% of all eligible employee contributions. All matching contributions vest immediately. The Company’s matching contributions to the plan totaled $16.3 million, $13.2 million, and $11.9 million in the years ended December 31, 2011, 2010 and 2009, respectively.

Deferred Compensation Plan

The Company’s non-qualified deferred compensation (“NQDC”) plan is an unfunded and unsecured deferred compensation arrangement. Under the NQDC plan, officers and other senior employees may elect to defer a portion of their compensation and contribute such amounts to one or more investment funds. The NQDC plan assets are included within short-term investments, and offsetting obligations are included within accrued compensation on the consolidated balance sheet. The investments are considered trading securities and are reported at fair value. The realized and unrealized holding gains and losses related to these investments are recorded in other (expense) income, net, and the offsetting compensation expense are recorded as operating expenses in the consolidated results of operations. The deferred compensation liability under the NQDC plan was approximately $9.3 million and $8.1 million as of December 31, 2011, and December 31, 2010, respectively. For additional information regarding the Company's NQDC, see Note 4, Cash, Cash Equivalents, and Investments.
Segments (Notes)
Segments [Text Block]
Segments

The Company’s chief operating decision maker (“CODM”) allocates resources and assesses performance based on financial information by the Company’s business groups. The Company’s operations are organized into two reportable segments: Infrastructure and Service Layer Technology ("SLT"). The Infrastructure segment consists of routing and switching products and services. Routing includes products and services from the E, M, MX, PTX, and T Series router families, and the network application platform, Junos Space. Switching primarily consists of products and services for EX Series and wireless local area network solutions, as well as, QFabric. The SLT segment includes SRX services and vGW virtual gateways, Firewall virtual private network systems and appliances, secure socket layer virtual private network appliances, the J Series router product family, intrusion detection and prevention appliances, wide area network optimization platforms, and Junos Pulse.

The primary financial measure used by the CODM in assessing performance of the segments is segment operating income, which includes certain cost of revenues, research and development (“R&D”) expenses, sales and marketing expenses, and general and administrative (“G&A”) expenses. The CODM does not allocate certain miscellaneous expenses to its segments even though such expenses are included in the Company’s management operating income.

For arrangements with both Infrastructure and SLT products and services, revenue is attributed to the segment based on the underlying purchase order, contract, or sell-through report. Direct costs and operating expenses, such as standard costs, R&D, and product marketing expenses, are generally applied to each segment. Indirect costs, such as manufacturing overhead and other cost of revenues, are allocated based on standard costs. Indirect operating expenses, such as sales, marketing, business development, and G&A expenses are generally allocated to each segment based on factors including headcount, usage, and revenue. The CODM does not allocate share-based compensation, amortization of purchased intangible assets, restructuring and impairment charges, gains or losses on equity investments, other net income and expense, income taxes, or certain other charges to the segments.

The following table summarizes financial information for each segment used by the CODM for the three years ended December 31, 2011 (in millions):
 
Years Ended December 31,
 
2011
 
2010
 
2009
Net revenues:
 
 
 
 
 
Infrastructure:
 
 
 
 
 
Routers
$
2,894.4

 
$
2,655.7

 
$
2,244.2

Switches
528.2

 
394.6

 
197.4

Total Infrastructure
3,422.6

 
3,050.3

 
2,441.6

SLT
1,026.1

 
1,043.0

 
874.3

Total net revenues
$
4,448.7

 
$
4,093.3

 
$
3,315.9

Segment operating income:
 
 
 
 
 
Infrastructure
$
718.3

 
$
773.7

 
$
541.4

SLT
199.0

 
208.0

 
127.0

Total segment operating income
917.3

 
981.7

 
668.4

Amortization of purchased intangible assets (1)
(27.1
)
 
(8.6
)
 
(15.4
)
Share-based compensation expense
(222.2
)
 
(182.0
)
 
(139.7
)
Share-based payroll tax expense
(9.3
)
 
(6.4
)
 
(0.8
)
Restructuring and other charges
(30.6
)
 
(10.8
)
 
(19.5
)
Acquisition-related and other charges (2)
(9.6
)
 
(6.3
)
 
(182.3
)
Total operating income
618.5

 
767.6

 
310.7

Other (expense) income, net
(46.8
)
 
10.6

 
1.4

Income before income taxes and noncontrolling interest
$
571.7

 
$
778.2

 
$
312.1

________________________________
(1)
Amount includes amortization expense of purchased intangible assets in operating expenses and in cost of revenues.
(2)
Amount includes acquisition-related costs in operating expenses and in cost of revenues.

Depreciation expense allocated to the Infrastructure segment was $110.0 million, $108.9 million, and $94.0 million in the years ended December 31, 2011, 2010, and 2009, respectively. The depreciation expense allocated to the SLT segment was $32.2 million, $37.9 million, and $39.0 million in the years ended December 31, 2011, 2010, and 2009, respectively.

The Company attributes revenues to geographic region based on the customer’s ship-to location. The following table shows net revenues by geographic region (in millions):
 
Years Ended December 31,
 
2011
 
2010
 
2009
Americas:
 
 
 
 
 
United States
$
2,015.8

 
$
1,890.1

 
$
1,515.1

Other
222.2

 
205.5

 
172.8

Total Americas
2,238.0

 
2,095.6

 
1,687.9

Europe, Middle East, and Africa
1,339.8

 
1,189.3

 
953.2

Asia Pacific
870.9

 
808.4

 
674.8

Total
$
4,448.7

 
$
4,093.3

 
$
3,315.9


During the year ended December 31, 2011, no single customer accounted for 10% or more of net revenues. Verizon Communications, Inc. accounted for 10.6% of the Company's total net revenues for 2010 and AT&T, Inc. accounted for 10.4% of the Company's total net revenues for 2009.

The majority of the Company’s assets, excluding cash and cash equivalents and investments, as of December 31, 2011, and December 31, 2010, were attributable to U.S. operations. For both of the years ended December 31, 2011, and December 31, 2010, gross property and equipment held in the U.S., as a percentage of total property and equipment, was approximately 80%. Although management reviews asset information on a corporate level and allocates depreciation expense by segment, the CODM does not review asset information on a segment basis.
Income Taxes (Notes)
Income Tax [Text Block]
Income Taxes
 
The components of income before the provision for income taxes and noncontrolling interest are summarized as follows (in millions):  
 
Years Ended December 31, 
 
2011
 
2010
 
2009
Domestic
$
218.4

 
$
370.6

 
$
50.1

Foreign
353.3

 
407.6

 
262.0

Total income before provision for income taxes and noncontrolling interest
$
571.7

 
$
778.2

 
$
312.1



The provision for income taxes is summarized as follows (in millions):  
 
Years Ended December 31, 
 
2011
 
2010
 
2009
Current provision (benefit):
 

 
 

 
 

Federal
$
19.5

 
$
(8.4
)
 
$
123.8

State
0.9

 
1.0

 
21.4

Foreign
47.8

 
44.2

 
43.5

Total current provision
68.2

 
36.8

 
188.7

Deferred provision (benefit):
 
 
 
 
 
Federal
23.0

 
57.5

 
(42.7
)
State
0.6

 
14.0

 
55.7

Foreign
(3.6
)
 
(7.5
)
 
(5.9
)
Total deferred provision
20.0

 
64.0

 
7.1

Income tax benefits attributable to employee stock plan activity
58.5

 
58.0

 
1.0

Total provision for income taxes
$
146.7

 
$
158.8

 
$
196.8



The provision for income taxes differs from the amount computed by applying the federal statutory rate to income before provision for income taxes as follows (in millions):  
 
Years Ended December 31, 
 
2011
 
2010
 
2009
Expected provision at 35% rate
$
200.1

 
$
272.4

 
$
109.2

State taxes, net of federal benefit
2.0

 
6.2

 
(1.6
)
Foreign income at different tax rates
(50.4
)
 
(71.5
)
 
(33.8
)
R&D credits
(21.3
)
 
(18.6
)
 
(14.4
)
Stock-based compensation
16.7

 
(40.2
)
 
62.1

Temporary differences not currently benefited
—

 
10.2

 
72.8

Other
(0.4
)
 
0.3

 
2.5

Total provision for income taxes
$
146.7

 
$
158.8

 
$
196.8



Deferred income taxes reflect the net tax effects of tax carry-forward items and temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company's deferred tax assets and liabilities are as follows (in millions):
 
As of December 31, 
 
2011
 
2010
Deferred tax assets:
 

 
 

Net operating loss carry-forwards
$
4.4

 
$
14.1

Foreign tax credit carry-forwards
48.7

 
40.3

Research and other credit carry-forwards
86.3

 
68.2

Deferred revenue
94.0

 
86.1

Stock-based compensation
91.2

 
75.6

Reserves and accruals not currently deductible
255.9

 
227.6

Other
31.0

 
26.8

Total deferred tax assets
611.5

 
538.7

Valuation allowance
(145.2
)
 
(122.2
)
Deferred tax assets, net of valuation allowance
466.3

 
416.5

Deferred tax liabilities:
 
 
 
Property and equipment basis differences
(87.0
)
 
(47.1
)
Purchased intangibles
(53.2
)
 
(58.5
)
Unremitted foreign earnings
(210.5
)
 
(175.1
)
Other
—

 
(0.1
)
Total deferred tax liabilities
(350.7
)
 
(280.8
)
Net deferred tax assets
$
115.6

 
$
135.7


 
As of December 31, 2011, and 2010, the Company had a valuation allowance on its U.S. domestic deferred tax assets of approximately $145.2 million and $122.2 million, respectively. The balance at December 31, 2011 consisted of approximately $94.3 million and $9.7 million against the Company's California and Massachusetts deferred tax assets, respectively, which will not be utilized in the future years, and approximately $41.2 million related to losses that are capital in nature and may carry forward to offset future capital gains. The valuation allowance increased $23.0 million and $9.4 million in the years ended December 31, 2011, and 2010, respectively. Approximately $13.7 million and $9.7 million of the 2011 increase was due to changes in income apportioned to California and Massachusetts, respectively, and approximately $9.4 million of the 2010 increase relates to the income apportioned to California. The income apportioned to Massachusetts and California impacts the future taxable income within these states for the years in which the deferred tax assets are expected to be realized or settled.
 
As of December 31, 2011, the Company had federal and California net operating loss carry-forwards of approximately $9.6 million and $39.6 million, respectively. The Company also had California tax credit carry-forwards of approximately $159.8 million. Approximately $21.3 million of the benefit from the California tax credit carry-forwards will be credited to additional paid-in capital when realized on the Company's income tax returns. Unused net operating loss carry-forwards will expire at various dates beginning in the year 2012. The California tax credit carry-forwards will carry forward indefinitely.
 
The Company provides U.S. income taxes on the earnings of foreign subsidiaries unless the subsidiaries' earnings are considered indefinitely reinvested outside of the United States. The Company has made no provision for U.S. income taxes on approximately $1,462.6 million of cumulative undistributed earnings of certain foreign subsidiaries through December 31, 2011, because it is the Company's intention to permanently reinvest such earnings. If such earnings were distributed, the Company would accrue additional income tax expense of approximately $447.3 million. These earnings are considered indefinitely invested in operations outside of the U.S., as we intend to utilize these amounts to fund future expansion of our international operations.

As of December 31, 2011, 2010, and 2009 the total amount of gross unrecognized tax benefits was $132.2 million, $116.4 million, and $183.6 million, respectively. As of December 31, 2011, approximately $117.2 million of the $132.2 million gross unrecognized tax benefits, if recognized, would affect the effective tax rate.
 
A reconciliation of the beginning and ending amount of the Company's total gross unrecognized tax benefits for the years ended December 31, 2011, 2010, and 2009 was as follows (in millions):
 
 
As of December 31,
 
2011
 
2010
 
2009
Balance beginning of the year
$
116.4

 
$
183.6

 
$
113.5

Tax positions related to current year:
 
 
 
 
 
Additions
17.6

 
13.9

 
12.7

Tax positions related to prior years:
 
 
 
 
 
Additions
6.4

 
—

 
73.5

Reductions
—

 
(73.8
)
 
(1.0
)
Settlements
(5.4
)
 
(1.6
)
 
(12.8
)
Lapses in statutes of limitations
(2.8
)
 
(5.7
)
 
(2.3
)
Balance end of the year
$
132.2

 
$
116.4

 
$
183.6


 
As of December 31, 2011, 2010, and 2009 the Company had accrued interest and penalties related to unrecognized tax benefits of $17.3 million, $18.9 million, and $23.5 million, respectively, within other long-term liabilities in the consolidated balance sheets. In accordance with the Company's accounting policy, accrued interest and penalties related to unrecognized tax benefits are recognized as a component of tax expense in the consolidated statements of operations. The Company recognized a benefit for net interest and penalties of $1.6 million, and $4.6 million, and an expense of $14.8 million in its consolidated statements of operations during the years ended December 31, 2011, 2010, and 2009, respectively.
 
The Company engages in continuous discussions and negotiations with tax authorities regarding tax matters in various jurisdictions. It is reasonably possible that the balance of the gross unrecognized tax benefits will decrease by approximately
$3.5 million within the next twelve months due to lapses of applicable statutes of limitation in multiple jurisdictions that the Company operated in. However, at this time, the Company is unable to make a reasonably reliable estimate of the timing of payments related to the remaining unrecognized tax liabilities due to uncertainties in the timing of tax audit outcomes.

During the fourth quarter of 2011, the Company resolved an audit by a state tax authority for the years from 2002 through 2004. As the result of the settlement, the Company recorded a tax benefit of approximately $7.0 million including interest and penalties.
 
During 2010, the Company recognized approximately $73.4 million of tax benefits related to share based compensation, which the Company had previously recorded as unrecognized tax benefits in 2009. On March 22, 2010, the Court overturned its May 27, 2009 decision in Xilinx v. Commissioner and affirmed the original U.S. Tax Court decision, which held in favor of the taxpayer. While Juniper Networks was not a named party to the case, the Court's decision eliminates the uncertainty regarding the benefit of the tax position taken by the Company in certain years prior to fiscal 2004 relative to the allocable transfer price of share-based compensation related to the Company's intangible development costs. The Court's decision affirms that the value of share-based compensation related to share-based compensation grants made prior to 2004 is not required to be included in cost sharing agreements between related parties. In light of the Court's decision, the Company has determined that the tax benefit recognized under its prior tax position is more likely than not to be sustained.

The Company conducts business globally and, as a result, Juniper Networks or one or more of its subsidiaries files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business the Company is subject to examination by taxing authorities throughout the world, including such major jurisdictions as Ireland, Hong Kong, U.K., France, Germany, The Netherlands, Japan, China, Australia, India, and the U.S. With few exceptions, the Company is no longer subject to U.S. federal, state and local, and non-U.S. income tax examinations for years before 2004, although carry-forward attributes that were generated prior to 2004 may still be adjusted upon examination by the Internal Revenue Service ("IRS") if the attributes either have been or will be used in a future period.
 
The Company is currently under examination by the IRS for the 2004 through 2009 tax years. The Company is also subject to two separate ongoing examinations by the India tax authorities for the 2004 tax year and 2004 through 2009 tax years, respectively. Additionally, the Company has not reached a final resolution with the IRS on an adjustment it proposed for the 1999 and 2000 tax years. The Company is not aware of any other examination by taxing authorities in any other major jurisdictions in which it files income tax returns as of December 31, 2011.
 
In May 2011, as part of the 2005 and 2006 IRS audit, the Company received a proposed adjustment related to its intercompany R&D cost sharing arrangement for the license of intangibles acquired in 2005. In 2009, as part of the 2004 IRS audit, the Company received a similar proposed adjustment related to the license of intangibles acquired in 2004. In December 2008, the Company received a proposed adjustment from the India tax authorities related to the 2004 tax year.

In 2009, the India tax authorities commenced a separate investigation of our 2004 through 2008 tax returns and are disputing the Company's determination of taxable income due to the cost basis of certain fixed assets. The Company accrued $4.6 million in penalties and interest in 2009 related to this matter. The Company understands that the India tax authorities may issue an initial assessment that is substantially higher than this amount. As a result, in accordance with the administrative and judicial process in India, the Company may be required to make payments that are substantially higher than the amount accrued in order to ultimately settle this issue. The Company strongly believes that any assessment it may receive in excess of the amount accrued would be inconsistent with applicable India tax laws and intends to defend this position vigorously.
 
The Company is pursuing all available administrative procedures relative to the matters referenced above. The Company believes that it has adequately provided for any reasonably foreseeable outcomes related to these proposed adjustments and the ultimate resolution of these matters is unlikely to have a material effect on its consolidated financial condition or results of operations; however there is still a possibility that an adverse outcome of these matters could have a material effect on its consolidated financial condition and results of operations. For more information, please see Note 15, Commitments and Contingencies, under the heading “IRS Notices of Proposed Adjustments.”
Commitments and Contingencies (Notes)
Commitments and Contingencies [Text Block]
Commitments and Contingencies

Commitments

The following table summarizes the Company’s future principal contractual obligations as of December 31, 2011 (in millions):
 
 
 
Years Ending December 31,
 
 
 
Total
 
2012
 
2013
 
2014
 
2015
 
2016
 
Thereafter
 
Other
Operating leases
$
352.7

 
$
57.9

 
$
50.8

 
$
63.8

 
$
53.4

 
$
26.6

 
$
100.2

 
$
—

Purchase commitments
150.6

 
150.6

 
—

 
—

 
—

 
—

 
—

 
—

Tax liabilities
108.5

 
—

 
—

 
—

 
—

 
—

 
—

 
108.5

Long-term debt
1,000.0

 
—

 
—

 
—

 
—

 
300.0

 
700.0

 
—

Interest payment on long-term debt
873.1

 
46.9

 
46.9

 
46.9

 
46.9

 
41.9

 
643.6

 
—

Other contractual obligations
73.1

 
63.3

 
4.8

 
3.0

 
2.0

 
—

 
—

 
—

Total
$
2,558.0

 
$
318.7

 
$
102.5

 
$
113.7

 
$
102.3

 
$
368.5

 
$
1,443.8

 
$
108.5



Operating Leases

The Company leases its facilities under operating leases that expire at various times, the longest of which expires on November 30, 2022. Future minimum payments under the non-cancelable operating leases totaled $352.7 million as of December 31, 2011. Rent expense for 2011, 2010, and 2009 was approximately $65.7 million, $55.9 million, and $56.5 million, respectively.

Purchase Commitments

In order to reduce manufacturing lead times and ensure adequate component supply, contract manufacturers utilized by the Company place non-cancelable, non-returnable (“NCNR”) orders for components based on the Company’s build forecasts. As of December 31, 2011, there were NCNR component orders placed by the contract manufacturers with a value of $150.6 million. The contract manufacturers use the components to build products based on the Company’s forecasts and customer purchase orders received by the Company. Generally, the Company does not own the components and title to the products transfers from the contract manufacturers to the Company and immediately to the Company’s customers upon delivery at a designated shipment location. If the components remain unused or the products remain unsold for specified periods, the Company may incur carrying charges or obsolete materials charges for components that the contract manufacturers purchased to build products to meet the Company’s forecast or customer orders. As of December 31, 2011, the Company had accrued $14.8 million based on its estimate of such charges.

Tax Liabilities

As of December 31, 2011, the Company had $108.5 million included in long-term liabilities in the consolidated balance sheet for unrecognized tax positions. At this time, the Company is unable to make a reasonably reliable estimate of the timing of payments related to the $108.5 million due to uncertainties in the timing of tax audit outcomes.

Long-Term Debt and Interest Payment on Long-Term Debt

As of December 31, 2011, the Company held long-term debt with a carrying value of $999.0 million. Of these Notes, $300.0 million will mature in 2016 and bears interest at a fixed rate of 3.10%, $300.0 million will mature in 2021 and bears interest at a fixed rate of 4.60%, and $400.0 million will mature in 2041 and bears interest at 5.95%. Interest on the Notes is payable semiannually. See Note 10, Financing, for further discussion of the Company's long-term debt.

Other Contractual Obligations

As of December 31, 2011, other contractual obligations primarily consisted of $25.1 million in indemnity-related and service related escrows, required by certain acquisitions completed in 2005, 2010 and 2011, $30.7 million in obligations related to a office campus build-out adjacent to the Company's headquarters, and other miscellaneous commitments.

Guarantees

The Company enters into agreements with customers that contain indemnification provisions relating to potential situations where claims could be alleged that the Company’s products infringe the intellectual property rights of a third-party. The Company also has financial guarantees consisting of guarantees of product and service performance, guarantees related to third-party customer-financing arrangements, customs and duties guarantees, and standby letters of credit for certain lease facilities. As of December 31, 2011, and 2010, the Company had $19.9 million and $21.6 million, respectively, in bank guarantees and standby letters of credit related to these financial guarantees.

Legal Proceedings

The Company is involved in disputes, litigation, and other legal actions, including, but not limited to, the matters described below. The Company is aggressively defending its current litigation matters, and while the Company currently believes that there are no existing claims or proceedings that are likely to have a material adverse effect on its financial position, the outcome of these matters is currently not determinable. There are many uncertainties associated with any litigation, and these actions or other third-party claims against the Company may cause the Company to incur costly litigation and/or substantial settlement charges. In addition, the resolution of any intellectual property litigation may require the Company to make royalty payments, which could adversely affect gross margins in future periods. If any of those events were to occur, the Company's business, financial condition, results of operations, and cash flows could be adversely affected. The actual liability in any such matters may be materially different from the Company's estimates, which could result in the need to adjust the liability and record additional expenses.

IPO Allocation Case

In December 2001, a class action complaint was filed in the United States District Court for the Southern District of New York against the Goldman Sachs Group, Inc., Credit Suisse First Boston Corporation, FleetBoston Robertson Stephens, Inc., Royal Bank of Canada (Dain Rauscher Wessels), SG Cowen Securities Corporation, UBS Warburg LLC (Warburg Dillon Read LLC), Chase (Hambrecht & Quist LLC), J.P. Morgan Chase & Co., Lehman Brothers, Inc., Salomon Smith Barney, Inc., Merrill Lynch, Pierce, Fenner & Smith, Incorporated (collectively, the “Underwriters”), Juniper Networks and certain of Juniper Networks' officers. This action was brought on behalf of purchasers of the Company's common stock in its initial public offering in June 1999 and the Company's secondary offering in September 1999. Specifically, among other things, this complaint alleged that the prospectus pursuant to which shares of common stock were sold in the Company's initial public offering and the Company's subsequent secondary offering contained certain false and misleading statements or omissions regarding the practices of the Underwriters with respect to their allocation of shares of common stock in these offerings and their receipt of commissions from customers related to such allocations. Various plaintiffs have filed actions asserting similar allegations concerning the initial public offerings of approximately 300 other issuers. These various cases pending in the Southern District of New York have been coordinated for pretrial proceedings as In re Initial Public Offering Securities Litigation, 21 MC 92. In April 2002, the plaintiffs filed a consolidated amended complaint in the action against the Company, alleging violations of the Securities Act of 1933 and the Securities Exchange Act of 1934. The defendants in the coordinated proceeding filed motions to dismiss. On February 19, 2003, the Court granted in part and denied in part the motion to dismiss, but declined to dismiss the claims against the Company.
 
The parties have reached a global settlement of the litigation. Under the settlement, the insurers are to pay the full amount of settlement share allocated to the Company, and the Company will bear no financial liability. The Company and other defendants will receive complete dismissals from the case. In October 2009, the Court entered an Opinion and Order granting final approval of the settlement. Certain objectors appealed; these appeals have now been dismissed or withdrawn. As a result, the case is now settled.
 
2011 Federal Securities Class Action

On August 15, 2011, a purported securities class action lawsuit, captioned City of Royal Oak Retirement System v. Juniper Networks, Inc., et al., Case No. 11-cv-04003-LHK, was filed in the United States District Court for the Northern District of California naming the Company and certain of its officers and directors as defendants. The complaint alleges that the defendants made false and misleading statements regarding the Company's business and prospects. On January 9, 2012 the Court appointed City of Omaha Police and Fire Retirement System and City of Bristol Pension Fund as lead plaintiff. Lead plaintiff filed an amended complaint on February 13, 2012. The amended complaint alleges that defendants made false and misleading statements about Juniper's business and future prospects, and failed to adequately disclose the impact of certain changes in accounting rules. The amended complaint purports to assert claims for violations of Sections 10(b), 20(a) and 20A of the Securities Exchange Act of 1934 and SEC Rule 10b-5 on behalf of those who purchased or otherwise acquired Juniper's common stock between July 20, 2010 and July 26, 2011, inclusive.

2011 California State Derivative Lawsuits

Between August 22 and September 9, 2011, four purported shareholder derivative actions were filed in the Superior Court of the State of California, County of Santa Clara, naming certain of the Company's officers and directors as defendants. The Company is named only as a nominal defendant in the actions. The actions were consolidated as In re Juniper Networks, Inc. Shareholder Litigation, Case No. 1-11-CV-207701 (Lead Case), by order dated September 12, 2011. The complaints are generally based upon the disclosures and alleged omissions challenged in the securities class action. The complaints purport to assert claims against the defendants for breach of fiduciary duties, unjust enrichment, abuse of control, gross mismanagement, and waste of corporate assets. The complaints seek, among other relief, damages in an unspecified amount, restitution, and attorneys' fees and costs.
2011 Federal Derivative Lawsuit
On September 27, 2011 and December 28, 2011, two purported shareholder derivative actions, captioned Ratinova v. Johnson, et al., Case No. 11-cv-04792 and Lisa E. Coppola, ERA v. Johnson, et al., Case No. 11-cv-06667, respectively, were filed in the United States District Court for the Northern District of California naming certain of the Company's officers and directors as defendants. The Company is named only as a nominal defendant in the action. Like the state derivative actions, the federal derivative lawsuits are generally based upon the disclosures and alleged omissions challenged in the securities class action. The complaints purport to assert claims against the defendants for breach of fiduciary duties and unjust enrichment. The complaints seek, among other relief, damages in an unspecified amount, restitution, and attorneys' fees and costs. By order dated January 30, 2012, the Court consolidated the actions as In re Juniper Networks, Inc. Shareholder Derivative Litigation, Master File No. 11-cv-04792-LHK. On February 3, 2012, the parties filed a stipulation in which the parties requested that the Court stay the action until such time as the Court entered an order denying a motion to dismiss in the related federal securities class action described above. On February 6, 2012, the Court granted the parties' stipulation.
IRS Notices of Proposed Adjustments

In May 2011, as a result of its audit of the Company's U.S. federal income tax returns for the 2005 and 2006 fiscal years, the IRS issued a Preliminary Notice of Deficiency (“PNOD”) regarding the Company's transfer pricing transactions under its intercompany R&D cost sharing arrangement related to the license of intangibles acquired in 2005. The asserted changes would affect the Company's income tax liabilities for tax years subsequent to 2004. Because of the PNOD, the estimated incremental tax liabilities for all relative tax years would be approximately $92.0 million, excluding interest and penalties. The Company has filed a protest to the proposed deficiency with the IRS, which is under review by the Appeals Division of the IRS.

In 2009, the Company received a PNOD from the IRS claiming that the Company owes additional taxes, plus interest and possible penalties, for the 2004 tax year based on a transfer pricing transaction related to the license of acquired intangibles under an intercompany R&D cost sharing arrangement. The asserted changes to the Company's 2004 tax year would affect the Company's income tax liabilities in tax years subsequent to 2003. In addition, the Company has not reached a final resolution with the IRS on an adjustment the IRS proposed for the 1999 and 2000 tax years. Because of the PNOD, the estimated incremental tax liability would be approximately $807.0 million, excluding interest and penalties. The Company has filed a protest to the proposed deficiency with the IRS, which is under review by the Appeals Division of the IRS.
 
The Company strongly believes the IRS' position with regard to transfer pricing transactions for the Company's 2004 through 2006 fiscal years are inconsistent with applicable tax laws, judicial precedent and existing Treasury regulations, and that the Company's previously reported income tax provisions for the years in question are appropriate. However, there can be no assurance that these matters will be resolved in the Company's favor. Regardless of whether these matters are resolved in the Company's favor, the final resolution of these matters could be expensive and time-consuming to defend and/or settle. While the Company believes it has provided adequately for these matters, there is still a possibility that an adverse outcome from these matters could have a material effect on its results of operations and financial condition.
 
In September 2008, as part of its ongoing audit of the U.S. federal income tax return for the 2004 fiscal year, the IRS issued a Notice of Proposed Adjustment (“NOPA”) regarding the Company's business credits. The Company believes that it has adequately provided for any reasonable foreseeable outcome related to this proposed adjustment.
 
The Company is also under routine examination by certain state and non-U.S. tax authorities. The Company believes that it has adequately provided for any reasonably foreseeable outcome related to these audits.
Selected Quarterly Financial Information (Notes)
Quarterly Financial Information [Text Block]
Selected Quarterly Financial Data (Unaudited)
 

The table below sets forth selected unaudited financial data for each quarter of the two years ended December 31, 2011 (in millions, except per share amounts):

 
Year Ended December 31, 2011
First Quarter
 
Second Quarter
 
Third Quarter
 
Fourth Quarter
Net revenues:
 

 
 

 
 

 
 

Product
$
877.4

 
$
891.4

 
$
861.9

 
$
847.5

Service
224.2

 
229.1

 
243.9

 
273.3

Total net revenues
1,101.6

 
1,120.5

 
1,105.8

 
1,120.8

Cost of revenues:
 
 
 
 
 
 
 
Product (2)
265.7

 
292.4

 
286.6

 
310.6

Service
100.0

 
105.9

 
107.6

 
111.3

Total cost of revenues
365.7

 
398.3

 
394.2

 
421.9

Gross margin
735.9

 
722.2

 
711.6

 
698.9

Operating expenses:
 
 
 
 
 
 
 
Research and development
262.0

 
257.3

 
257.1

 
250.5

Sales and marketing
246.3

 
246.6

 
254.9

 
253.2

General and administrative
44.9

 
44.3

 
44.5

 
45.5

Amortization of purchased intangibles
1.5

 
1.3

 
1.3

 
1.2

Restructuring and other charges (1)
(0.3
)
 
(0.9
)
 
16.8

 
15.0

Acquisition-related and other charges (2)
4.1

 
2.7

 
—

 
0.3

Total operating expenses
558.5

 
551.3

 
574.6

 
565.7

Operating income
177.4

 
170.9

 
137.0

 
133.2

Interest and other income (expense), net
(6.5
)
 
(13.7
)
 
(15.9
)
 
(10.7
)
Income before income taxes and noncontrolling interest
170.9

 
157.2

 
121.1

 
122.5

Income tax provision
41.3

 
41.7

 
37.4

 
26.3

Consolidated net income
129.6

 
115.5

 
83.7

 
96.2

Adjust for net loss attributable to noncontrolling interest
0.1

 
—

 
—

 
—

Net income attributable to Juniper Networks
$
129.7

 
$
115.5

 
$
83.7

 
$
96.2

Net income per share attributable to Juniper Networks common stockholders: (3)
 
 
 
 
 
 
 
Basic
$
0.24

 
$
0.22

 
$
0.16

 
$
0.18

Diluted
$
0.24

 
$
0.21

 
$
0.16

 
$
0.18


(1) Restructuring and other charges consisted of restructuring charges and asset impairment charges. In the third quarter of 2011, the Company implemented the 2011 Restructuring Plan for workforce reduction and recorded restructuring charges of $16.8 million. In the fourth quarter of 2011, the Company recorded a charge of $13.5 million associated with an abandoned in-process internal used software project.
(2) Acquisition-related and other charges comprised of direct and indirect costs such as financial advisory, legal, and due diligence, as well as integration costs related to the acquisitions completed in 2010 and 2011.
(3) Net income per share attributable to Juniper Network stockholders is computed independently. Therefore, the sum of the quarterly net income per share may not equal the total computed for the fiscal year or any cumulative interim period.




 
Year Ended December 31, 2010
First Quarter
 
Second Quarter
 
Third Quarter
 
Fourth Quarter
Net revenues:
 

 
 

 
 

 
 

Product
$
721.2

 
$
774.1

 
$
801.2

 
$
962.2

Service
191.4

 
204.2

 
211.2

 
227.8

Total net revenues
912.6

 
978.3

 
1,012.4

 
1,190.0

Cost of revenues:
 
 
 
 
 
 
 
Product
222.4

 
231.8

 
247.0

 
299.7

Service
78.2

 
86.6

 
87.6

 
98.3

Total cost of revenues
300.6

 
318.4

 
334.6

 
398.0

Gross margin
612.0

 
659.9

 
677.8

 
792.0

Operating expenses:
 
 
 
 
 
 
 
Research and development
207.0

 
224.8

 
231.2

 
254.9

Sales and marketing
192.4

 
202.3

 
204.7

 
257.7

General and administrative
43.1

 
45.9

 
43.8

 
45.1

Amortization of purchased intangibles
1.1

 
1.2

 
0.9

 
0.9

Restructuring charges (1)
8.1

 
0.2

 
0.2

 
2.3

Acquisition-related charges (2)
—

 
0.5

 
1.5

 
4.3

Total operating expenses
451.7

 
474.9

 
482.3

 
565.2

Operating income
160.3

 
185.0

 
195.5

 
226.8

Other income (expense), net
1.4

 
4.0

 
0.2

 
4.8

Income before income taxes and noncontrolling interest
161.7

 
189.0

 
195.7

 
231.6

Income tax (benefit) provision
(2.9
)
 
58.7

 
61.4

 
41.5

Consolidated net income
164.6

 
130.3

 
134.3

 
190.1

Adjust for net (income) loss attributable to noncontrolling interest
(1.5
)
 
0.2

 
0.2

 
0.1

Net income attributable to Juniper Networks
$
163.1

 
$
130.5

 
$
134.5

 
$
190.2

Net income per share attributable to Juniper Networks common stockholders: (3)
 
 
 
 
 
 
 
Basic
$
0.31

 
$
0.25

 
$
0.26

 
$
0.36

Diluted
$
0.30

 
$
0.24

 
$
0.25

 
$
0.35


(1) Restructuring costs are typically comprised of employee severance costs, costs of consolidating duplicate facilities and contract termination costs. In the first quarter of 2010, the Company implemented a plan that resulted in reduction in workforce and facilities in certain business operations.
(2) Acquisition-related and other charges comprised of direct and indirect costs such as financial advisory, legal, due diligence, and integration costs from the four acquisitions completed in 2010.
(3) Net income per share attributable to Juniper Network stockholders is computed independently. Therefore, the sum of the quarterly net income per share may not equal the total computed for the fiscal year or any cumulative interim period.
Subsequent Events (Notes)
Subsequent Events [Text Block]
Subsequent Event

Stock Repurchases
 
Subsequent to December 31, 2011, through the filing of this report, the Company repurchased 2.4 million shares of its common stock, for $51.6 million at an average purchase price of $21.75 per share, under its 2010 Stock Repurchase Program. As of the filing of this Annual Report on Form 10-K, the Company's 2010 Stock Repurchase Program had remaining authorized funds of $162.2 million. Purchases under the Company's 2010 Stock Repurchase Program are subject to a review of the circumstances in place at the time and will be made from time to time as permitted by securities laws and other legal requirements. This program may be discontinued at any time.

Business Acquisition
 
On February 13, 2012, the Company acquired Mykonos Software, a provider of Intrusion Deception Systems that protect websites and web applications, for cash consideration of approximately $80.0 million. This acquisition enables the Company to extend its security portfolio with the intrusion deception system that is capable of detecting an attacker before an attack is in progress. The Company is in the process of determining the net assets acquired and goodwill associated with this acquisition.

Segment Changes
 
In the first quarter of 2012, the Company has aligned its organization structure to focus on its platform and software strategy. Beginning 2012, the Company will conform its reportable segments to this new business structure.
Valuation and Qualifying Accounts
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Valuation and Qualifying Account
Years Ended December 31, 2011, 2010, and 2009
 
 
Balance at Beginning of Year
 
Charged to (Reversed from) Costs and Expenses
 
Recoveries (Deductions), Net
 
Balance at End of Year
 
(In millions)
Year ended December 31, 2011
 

 
 

 
 

 
 

Allowance for doubtful accounts
$
10.1

 
$
(0.2
)
 
$
(0.4
)
 
$
9.5

Sales returns reserve
$
52.8

 
$
108.8

 
$
(109.6
)
 
$
52.0

Year ended December 31, 2010
 

 
 

 
 

 
 

Allowance for doubtful accounts
$
9.1

 
$
1.2

 
$
(0.2
)
 
$
10.1

Sales returns reserve
$
45.6

 
$
104.4

 
$
(97.2
)
 
$
52.8

Year ended December 31, 2009
 

 
 

 
 

 
 

Allowance for doubtful accounts
$
9.7

 
$
(0.6
)
 
$
—

 
$
9.1

Sales returns reserve
$
36.8

 
$
84.1

 
$
(75.3
)
 
$
45.6

Summary of Significant Accounting Policies (Policies)
Use of Estimates, Policy [Policy Text Block] 
Use of Estimates
 
The preparation of the financial statements and related disclosures in conformity with U.S. GAAP requires the Company to make judgments, assumptions, and estimates that affect the amounts reported in the consolidated financial statements and the accompanying notes. The Company bases its estimates and assumptions on current facts, historical experience, and various other factors that it believes are reasonable under the circumstances, to determine the carrying values of assets and liabilities that are not readily apparent from other sources. To the extent there are material differences between our estimates and the actual results, our future consolidated results of operation may be affected.
Fair Value of Financial Instruments, Policy [Policy Text Block] 
Fair Value

Fair value is defined as the price that would be received upon sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining fair value, the Company considers the principal or most advantageous market in which it transacts, and considers assumptions that market participants would use when pricing the asset or liability. The Company applies the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:

Level 1 – Quoted prices in active markets for identical assets or liabilities.

Level 2 – Quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. These inputs are valued using market based approaches.

Level 3 – Inputs are unobservable inputs based on the Company’s assumptions. These inputs, if any, are valued using internal financial models.
Cash and Cash Equivalents, Policy [Policy Text Block] 
Cash and Cash Equivalents

All highly liquid investments purchased with an original maturity of three months or less are classified as cash and cash equivalents. Cash and cash equivalents consist of cash on hand, demand deposits with banks, highly liquid investments in money market funds, commercial paper, government securities, certificates of deposit, and corporate debt securities, which are readily convertible into cash.

Investment, Policy [Policy Text Block] 
Investments in Available-for-Sale and Trading Securities
 
Investments with stated maturities of greater than three months are classified as short-term or long-term investments. Management determines the appropriate classification of securities at the time of purchase and re-evaluates such classification as of each balance sheet date.

The Company's investments in publicly-traded debt securities are classified as available-for-sale. Available-for-sale investments are initially recorded at cost and periodically adjusted to fair value in the consolidated balance sheets. Unrealized gains and losses on these investments are reported as a separate component of accumulated other comprehensive income (loss). Realized gains and losses are determined based on the specific identification method and are reported in the consolidated statements of operations.

The Company recognizes an impairment charge for available-for-sale investments when a decline in the fair value of its investments below the cost basis is determined to be other than temporary. The Company considers various factors in determining whether to recognize an impairment charge, including the length of time the investment has been in a loss position, the extent to which the fair value has been less than the Company's cost basis, the investment's financial condition, and near-term prospects of the investee. If the Company determines that the decline in an investment's fair value is other than temporary, the difference is recognized as an impairment loss in its consolidated statements of operations.

The Company's non-qualified compensation plan, which invests in mutual funds are classified as trading securities and reported at fair value in the consolidated balance sheets. The realized and unrealized holding gains and losses are reported in the consolidated statements of operations.
Derivatives, Policy [Policy Text Block] 

Derivatives
 
The Company uses derivatives to partially offset its market exposure to fluctuations in certain foreign currencies. The Company does not enter into derivatives for speculative or trading purposes.
 
The Company uses foreign currency forward contracts to mitigate variability in gains and losses generated from the re-measurement of certain monetary assets and liabilities denominated in non-functional currencies. These derivatives are carried at fair value with changes recorded in other (expense) income, net. Changes in the fair value of these derivatives are largely offset by re-measurement of the underlying assets and liabilities. Cash flows from such derivatives are classified as operating activities. These foreign exchange forward contracts have maturities of one year or less.
 
The Company also uses foreign currency forward or option contracts to hedge certain forecasted foreign currency transactions relating to operating expenses. These derivatives are designated as cash flow hedges and have maturities of less than one year. These derivatives are carried at fair value and the effective portion of the derivative's gain or loss is initially reported as a component of accumulated other comprehensive income (loss), and upon occurrence of the forecasted transaction, is subsequently reclassified into the operating expense line item to which the hedged transaction relates. The Company records any ineffectiveness of the hedging instruments, which was immaterial during 2011, 2010, and 2009, in other (expense) income, net, on its consolidated statements of operations. Cash flows from such hedges are classified as operating activities.
Cost Method Investments, Policy [Policy Text Block] 
Privately-Held Investments
 
The Company has investments in privately-held companies. These investments are included in other long-term assets in the consolidated balance sheets and are carried at cost, adjusted for any impairment, as the Company does not have a controlling interest and does not have the ability to exercise significant influence over these companies. These investments are inherently high risk as the market for technologies or products manufactured by these companies are usually early stage at the time of the investment by the Company and such markets may never be significant. The Company measures the fair value of privately-held investments using an analysis of the financial conditions and near term prospects of the investees, including recent financing activities and their capital structure. Realized gains and losses, if any, are reported in the consolidated statements of operations.
Concentration Risk Disclosure [Text Block] 
Concentrations
 
Financial instruments that subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, investments, and accounts receivable. The Company invests only in high-quality credit instruments and maintains its cash, cash equivalents, available-for-sale investments in fixed income securities, and money market funds with several high-quality institutions. Deposits held with banks, including those held in foreign branches of global banks, may exceed the amount of insurance provided on such deposits. These deposits may be redeemed upon demand and, therefore, bear minimal risk.
 
Generally, credit risk with respect to accounts receivable is diversified due to the number of entities comprising the Company's customer base and their dispersion across different geographic locations throughout the world. The Company performs ongoing credit evaluations of its customers and generally does not require collateral on accounts receivable. The Company maintains reserves for potential bad debt and historically such losses have been within management's expectations. No single customer accounted for more than 10% of the Company's total net revenues for 2011. Verizon Communications, Inc., and AT&T, Inc., accounted for 10.6%, and 10.4% of the Company's total net revenues for 2010 and 2009, respectively.
 
The Company relies on sole suppliers for certain of its components such as ASICs and custom sheet metal. Additionally, the Company relies primarily on a limited number of significant independent contract manufacturers for the production of all of its products. The inability of any supplier or manufacturer to fulfill supply requirements of the Company could negatively impact future operating results.
Property, Plant and Equipment, Policy [Policy Text Block] 
Property and Equipment
 
Property and equipment are recorded at cost less accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets of one and half years to five years for computers, equipment and software, five years for furniture and fixtures, seven to forty years for building and building improvements, and ten to forty years for land improvements. Leasehold improvements are amortized using the straight-line method over lease term, for a maximum of ten years. Construction in progress is related to the construction or development of property and equipment that have not yet been placed in service for their intended use. Depreciation for equipment commences once it is placed in service and depreciation for buildings and leasehold improvements commences once they are ready for their intended use.
Goodwill and Intangible Assets, Policy [Policy Text Block] 
Goodwill and Other Long-Lived Assets
 
Goodwill represents the purchase price over estimated fair value of net assets of businesses acquired in a business combination. Goodwill and other intangible assets acquired in a business combination and determined to have an indefinite useful life are not amortized, but instead tested for impairment at least annually during the fourth quarter. Such goodwill and other intangible assets may also be tested for impairment between annual tests in the presence of impairment indicators such as, but not limited to: (a) a significant adverse change in legal factors or in the business climate; (b) a substantial decline in our market capitalization, (c) an adverse action or assessment by a regulator; (d) unanticipated competition; (e) loss of key personnel; (f) a more likely-than-not expectation of sale or disposal of a reporting unit or a significant portion thereof; (g) a realignment of our resources or restructuring of our existing businesses in response to changes to industry and market conditions; (h) testing for recoverability of a significant asset group within a reporting unit; or (i) higher discount rate used in the impairment analysis as impacted by an increase in interest rates.

The Company performs its annual goodwill impairment analysis at its reporting unit level, which is one level below its operating segment level during the fourth quarter of each year. The fair value of the Company's reporting units is determined using both the income and market valuation approaches. Under the income approach, the fair value of the reporting unit is based on the present value of estimated future cash flows that the reporting unit is expected to generate over its remaining life. Under the market approach, the value of the reporting unit is based on an analysis that compares the value of the reporting unit to values of publicly traded companies in similar lines of business. In the application of the income and market valuation approaches, the Company is required to make estimates of future operating trends and judgments on discount rates and other variables. Actual future results related to assumed variables could differ from these estimates.

Long-lived assets, such as property, plant, and equipment, and purchased intangible assets subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Such events or circumstances include, but are not limited to, a significant decrease in the fair value of the underlying business, a significant decrease in the benefits realized from an acquired business, difficulties or delays in integrating the business or a significant change in the operations of an acquired business. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset, or asset group, to estimated undiscounted future cash flows expected to be generated by the asset, or asset group. An impairment charge is recognized by the amount by which the carrying amount of the asset exceeds its fair value.

The Company amortizes intangible assets with estimable useful lives on a straight-line basis over their useful lives.
Revenue Recognition, Policy [Policy Text Block] 
Revenue Recognition
 
Revenue is recognized when all of the following criteria have been met:

•
Persuasive evidence of an arrangement exists.  The Company generally relies upon sales contracts or agreements, and customer purchase orders to determine the existence of an arrangement.

•
Delivery has occurred.  The Company uses shipping terms and related documents, or written evidence of customer acceptance, when applicable, to verify delivery or performance.

•
Sales price is fixed or determinable.  The Company assesses whether the sales price is fixed or determinable based on the payment terms and whether the sales price is subject to refund or adjustment.

•
Collectability is reasonably assured.  The Company assesses collectability based on creditworthiness of customers as determined by our credit checks and their payment histories. The Company records accounts receivable net of allowance for doubtful accounts, estimated customer returns, and pricing credits.
 
In 2010, the Company adopted, on a prospective basis, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2009-13, Topic 605 - Multiple-Deliverable Revenue Arrangements (“ASU 2009-13”). ASU 2009-13 changes the requirements for establishing separate units of accounting in a multiple element arrangement and requires the allocation of arrangement consideration to each deliverable to be based on the relative selling price. Concurrently with issuing ASU 2009-13, the FASB also issued ASU No. 2009-14, Topic 985 - Certain Revenue Arrangements That Include Software Elements (“ASU 2009-14”). ASU 2009-14 excludes software that is contained on a tangible product from the scope of software revenue guidance if the software component and the non-software component function together to deliver the tangible products' essential functionality. The Company applied these two standards for new and materially modified arrangements originating after December 31, 2009.

When a sales arrangement contains multiple elements and software and non-software components function together to deliver the tangible products' essential functionality, the Company allocates revenue to each element based on a selling price hierarchy. The selling price for a deliverable is based on its vendor-specific objective evidence (“VSOE”) if available, third-party evidence (“TPE”) if VSOE is not available, or estimated selling price (“ESP”) if neither VSOE nor TPE is available. The Company then recognizes revenue on each deliverable in accordance with its policies for product and service revenue recognition. VSOE of selling price is based on the price charged when the element is sold separately. In determining VSOE, the Company requires that a substantial majority of the selling prices fall within a reasonable range based on historical discounting trends for specific products and services. TPE of selling price is established by evaluating largely interchangeable competitor products or services in stand-alone sales to similarly situated customers. However, as the Company's products contain a significant element of proprietary technology and its solutions offer substantially different features and functionality, the comparable pricing of products with similar functionality typically cannot be obtained. Additionally, as the Company is unable to reliably determine what competitors products' selling prices are on a stand-alone basis, the Company is not typically able to determine TPE. The ESP is established considering multiple factors including, but not limited to pricing practices in different geographies and through different sales channels, gross margin objectives, internal costs, competitor pricing strategies, and industry technology lifecycles.

In multiple element arrangements where software deliverables are included, revenue is allocated to each separate unit of accounting for each of the non-software deliverables and to the software deliverables as a group using the relative selling prices of each of the deliverables in the arrangement based on the aforementioned selling price hierarchy. If the arrangement contains more than one software deliverable, the arrangement consideration allocated to the software deliverables as a group is then allocated to each software deliverable using the guidance for recognizing software revenue.

The Company limits the amount of revenue recognition for delivered elements to the amount that is not contingent on the future delivery of products or services or subject to customer-specific return or refund privileges. The Company evaluates each deliverable in an arrangement to determine whether they represent separate units of accounting. A deliverable constitutes a separate unit of accounting when it has stand-alone value and there are no customer-negotiated refunds or return rights for the delivered elements. If the arrangement includes a customer-negotiated refund or return right relative to the delivered item, and the delivery and performance of the undelivered item is considered probable and substantially in the Company's control, the delivered element constitutes a separate unit of accounting. In circumstances when the aforementioned criteria are not met, the deliverable is combined with the undelivered elements, and the allocation of the arrangement consideration and revenue recognition is determined for the combined unit as a single unit. Allocation of the consideration is determined at arrangement inception on the basis of each unit's relative selling price. The new standards do not generally change the units of accounting for the Company's revenue transactions.

Prior to 2010, and for current software sales, the Company allocated revenue to each element using the residual method when the VSOE of fair value of the undelivered items for arrangements with multiple elements, such as sales of products that include services and software, exists. Under the residual method, the amount of revenue allocated to delivered elements equals the total arrangement consideration less the aggregate fair value of any undelivered elements. If VSOE of one or more undelivered items does not exist, revenue from the entire arrangement is deferred and recognized at the earlier of: (i) delivery of those elements or (ii) when fair value can be established unless maintenance is the only undelivered element, in which case, the entire arrangement fee is recognized ratably over the contractual support period.

The Company accounts for multiple agreements with a single customer as one arrangement if the contractual terms and/or substance of those agreements indicate that they may be so closely related that they are, in effect, parts of a single arrangement. For sales to direct end-users, value-added resellers, and original equipment manufacturer ("OEM") partners, the Company recognizes product revenue upon transfer of title and risk of loss, which is generally upon shipment. It is the Company's practice to identify an end-user prior to shipment to a value-added reseller. For the Company's end-users and value-added resellers, there are no significant obligations for future performance such as rights of return. The Company's agreements with its OEM partners may allow future rights of returns or pricing credits. A portion of the Company's sales is made through distributors under agreements allowing for pricing credits or rights of return. Product revenue on sales made through these distributors is recognized upon sell-through as reported by the distributors to the Company. Deferred revenue on shipments to distributors reflects the effects of distributor pricing credits and the amount of gross margin expected to be realized upon sell-through. Deferred revenue is recorded net of the related product costs of revenue.
 
The Company records reductions to revenue for estimated product returns and pricing adjustments, such as rebates and price protection, in the same period that the related revenue is recorded. The amount of these reductions is based on historical sales returns and price protection credits, specific criteria outlined in rebate agreements, and other factors known at the time.
 
Service revenues include revenue from maintenance, training, and professional services. Maintenance is offered under renewable contracts. Revenue from maintenance service contracts is deferred and recognized ratably over the contractual support period, which is generally one to three years. Revenue from training and professional services is recognized as services are completed or ratably over the contractual period, which is generally one year or less.
 
The Company sells certain interests in accounts receivable on a non-recourse basis as part of customer financing arrangements primarily with one major financing company. Cash received under this arrangement in advance of revenue recognition is recorded as a secured borrowing within other current liabilities.
Allowance For Doubtful Accounts [Policy Text Block] 
Allowance for Doubtful Accounts
 
The allowance for doubtful accounts is based on the Company's assessment of the collectability of customer accounts. The Company regularly reviews its receivables that remain outstanding past their applicable payment terms and establishes allowance and potential write-offs by considering factors such as historical experience, credit quality, age of the accounts receivable balances, and current economic conditions that may affect a customer's ability to pay.
Standard Product Warranty, Policy [Policy Text Block] 
Warranty Reserves
 
The Company generally offers a one-year warranty on all of its hardware products and a 90-day warranty on the media that contains the software embedded in the products. Warranty costs are accrued as part of the Company's cost of sales based on associated material costs, labor costs, and overhead at the time revenue is recognized. Material costs are estimated primarily based upon the historical costs to repair or replace product returns within the warranty period. Labor and overhead costs are estimated primarily based upon historical trends in the cost to support customer cases within the warranty period.
Contract Manufacturer Liabilities Policy Text Block [Policy Text Block] 
Contract Manufacturer Liabilities
 
The Company outsources most of its manufacturing, repair, and supply chain management operations to its independent contract manufacturers, and a significant portion of its cost of revenues consists of payments to them. The independent contract manufacturers produce the Company's products using design specifications, quality assurance programs, and standards established by the Company, and they procure components and manufacture the products based on the Company's demand forecasts. These forecasts are the Company's estimates of future demand for its products, based upon historical trends and analysis from the Company's sales and marketing organizations, adjusted for overall market conditions. The Company establishes a provision for inventory, carrying costs, and obsolete material exposures for excess components purchased based on historical trends.
Research and Development Expense, Policy [Policy Text Block] 
Research and Development
 
Costs to research, design, and develop the Company's products are expensed as incurred. Software development costs are capitalized beginning when a product's technological feasibility has been established and ending when a product is available for general release to customers. Generally, the Company's products are released soon after technological feasibility has been established. As a result, costs incurred between achieving technological feasibility and product general availability have not been significant, and all software development costs have been expensed as incurred.
Advertising Costs, Policy [Policy Text Block] 
Advertising
 
Advertising costs are charged to sales and marketing expense as incurred. Advertising expense was $17.2 million, $17.1 million, and $11.4 million, for 2011, 2010, and 2009, respectively.
Commitments and Contingencies, Policy [Policy Text Block] 
Loss Contingencies
 
The Company is subject to the possibility of various loss contingencies arising in the ordinary course of business. Management considers the likelihood of loss related to an asset, or the incurrence of a liability, as well as its ability to reasonably estimate the amount of loss, in determining loss contingencies. An estimated loss contingency is accrued when it is probable that an asset has been impaired or a liability has been incurred and the amount of loss can be reasonably estimated. The Company records a charge equal to the minimum estimated liability or a loss contingency only when both of the following conditions are met: (i) information available prior to issuance of the consolidated financial statements indicates that it is probable that an asset had been impaired or a liability had been incurred at the date of the financial statements, and (ii) the range of loss can be reasonably estimated. The Company regularly evaluates current information available to determine whether such accruals should be adjusted and whether new accruals are required.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] 
Share-Based Compensation

The Company utilizes the Black-Scholes-Merton (“BSM”) option-pricing model in order to estimate the fair value of its share-based payment awards on the date of grant. Share-base compensation expense for expected-to-vest share-based awards is valued under the single-option approach and and amortized on a straight-line basis, net of estimated forfeitures, and RSUs and PSAs are amortized on a ratable basis, net of estimated forfeitures. The value of the portion of the award that is ultimately expected to vest is recognized as expense over the requisite service period.

The BSM model requires various highly subjective assumptions that represents management's best estimates of volatility, expected option life, and risk-free interest rate. The expected volatility is based on the implied volatility of market traded options on our common stock, adjusted for other relevant factors including historical volatility of our common stock over the most recent period commensurate with the estimated expected life of our stock options. The expected life of an award is based on historical experience, the terms and conditions of the stock awards granted to employees, as well as the potential effect from options that have not been exercised at the time.
Income Tax, Policy [Policy Text Block] 
Provision for Income Taxes
 
Deferred tax assets and liabilities are measured using the currently enacted tax rates that apply to taxable income in effect for the years in which those tax assets are expected to be realized or settled. The Company regularly assesses the likelihood that its deferred tax assets will be realized from recoverable income taxes or recovered from future taxable income. To the extent that the Company believes any amounts are not more likely than not to be realized through the reversal of the deferred tax liabilities and future income, the Company records a valuation allowance to reduce its deferred tax assets. In the event the Company determines that all or part of the net deferred tax assets are not realizable in the future, an adjustment to the valuation allowance would be charged to earnings in the period such determination is made. Similarly, if the Company subsequently realizes deferred tax assets that were previously determined to be unrealizable, the respective valuation allowance would be reversed, resulting in an adjustment to earnings in the period such determination is made. In addition, the calculation of tax liabilities involves dealing with uncertainties in the application of complex tax regulations. The Company recognizes and measures potential liabilities based on its estimate of whether, and the extent to which, additional taxes will be due.
Stockholders' Equity, Policy [Policy Text Block] 
Comprehensive Income (Loss)
 
Comprehensive income (loss) is defined as the change in equity during a period from transactions and other events and circumstances from non-owner sources. The Company includes the components of comprehensive income (loss) as part of its consolidated statements of changes in equity. Accumulated other comprehensive income (loss) includes net unrealized gains (losses) on available-for-sale securities and on derivatives designated as cash flow hedges that are excluded from net income, and net foreign currency translations.
Recent Accounting Pronouncements 
Recent Accounting Pronouncements

In May 2011, the Financial Accounting Standards Board ("FASB") issued ASU No. 2011-04, Topic 820 - Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs (“ASU 2011-04”), which amends current fair value measurement and disclosure guidance to converge with International Financial Reporting Standards ("IFRS") and provides increased transparency around valuation inputs and investment categorization. This guidance is effective for fiscal years and interim periods, beginning after December 15, 2011. Early application by public companies is not permitted. The Company's adoption of ASU 2011-04 will not have an impact on its consolidated results of operations or financial condition.

In June 2011, the FASB issued ASU No. 2011-05, Topic 220 - Presentation of Comprehensive Income (“ASU 2011-05”), which requires an entity to present total comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements and eliminates the option to present the components of other comprehensive income as part of the statement of changes in stockholders' equity. This guidance is effective for fiscal years and interim periods, beginning after December 15, 2011. The Company's adoption of ASU 2011-05 will not have an impact on its consolidated results of operations or financial condition.

In September 2011, the FASB issued ASU No. 2011-08, Topic 350 - Intangibles - Goodwill and Other ("ASU 2011-08"), which amends Topic 350 to allow an entity to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. An entity would not be required to calculate the fair value of a reporting unit unless the entity determines, based the qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount. This guidance is effective for annual and interim goodwill tests performed for years beginning after December 15, 2011. Early adoption is permitted. The Company's adoption of ASU 2011-08 is not expected to have an impact on its consolidated results of operations or financial condition.

In December 2011, the FASB issued Accounting Standards Update ("ASU") No. 2011-12, Topic 220 - Comprehensive Income ("ASU 2011-12"), which indefinitely deferred certain provisions of ASU 2011-05, including the requirement to present reclassification adjustments out of accumulated other comprehensive income by component in both the statement in which net income is presented and the statement in which other comprehensive income is presented. This amendment is effective for both annual and interim financial statements beginning after December 15, 2011. The Company's adoption of ASU 2011-12 will not have an impact on its consolidated results of operations or financial condition.

In December 2011, the FASB issued ASU No. 2011-11, Topic 2010 - Balance Sheet ("ASU 2011-11"), which contains new disclosure requirements regarding the nature of an entity's rights of set off and related arrangements associated with its financial instruments and derivative instruments. Under U.S. GAAP, certain derivative and repurchase agreement arrangements are granted exceptions from the general off-setting model. To facilitate comparison between financial statements prepared under U.S. GAAP and IFRS, the new disclosure requirement will provide financial statement users information regarding both gross and net exposures. This guidance is effective for annual and interim financial statements beginning on or after January 1, 2013. Retrospective application is required. The Company does not set off related arrangements associated with its financial instruments and derivative instruments. Its adoption of ASU 2011-11 is not expected to have an impact on its consolidated results of operations or financial condition.
Description of New Accounting Pronouncements Not yet Adopted [Text Block] 
Recent Accounting Pronouncements

In May 2011, the Financial Accounting Standards Board ("FASB") issued ASU No. 2011-04, Topic 820 - Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs (“ASU 2011-04”), which amends current fair value measurement and disclosure guidance to converge with International Financial Reporting Standards ("IFRS") and provides increased transparency around valuation inputs and investment categorization. This guidance is effective for fiscal years and interim periods, beginning after December 15, 2011. Early application by public companies is not permitted. The Company's adoption of ASU 2011-04 will not have an impact on its consolidated results of operations or financial condition.

In June 2011, the FASB issued ASU No. 2011-05, Topic 220 - Presentation of Comprehensive Income (“ASU 2011-05”), which requires an entity to present total comprehensive income, the components of net income, and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements and eliminates the option to present the components of other comprehensive income as part of the statement of changes in stockholders' equity. This guidance is effective for fiscal years and interim periods, beginning after December 15, 2011. The Company's adoption of ASU 2011-05 will not have an impact on its consolidated results of operations or financial condition.

In September 2011, the FASB issued ASU No. 2011-08, Topic 350 - Intangibles - Goodwill and Other ("ASU 2011-08"), which amends Topic 350 to allow an entity to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. An entity would not be required to calculate the fair value of a reporting unit unless the entity determines, based the qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount. This guidance is effective for annual and interim goodwill tests performed for years beginning after December 15, 2011. Early adoption is permitted. The Company's adoption of ASU 2011-08 is not expected to have an impact on its consolidated results of operations or financial condition.

In December 2011, the FASB issued Accounting Standards Update ("ASU") No. 2011-12, Topic 220 - Comprehensive Income ("ASU 2011-12"), which indefinitely deferred certain provisions of ASU 2011-05, including the requirement to present reclassification adjustments out of accumulated other comprehensive income by component in both the statement in which net income is presented and the statement in which other comprehensive income is presented. This amendment is effective for both annual and interim financial statements beginning after December 15, 2011. The Company's adoption of ASU 2011-12 will not have an impact on its consolidated results of operations or financial condition.

In December 2011, the FASB issued ASU No. 2011-11, Topic 2010 - Balance Sheet ("ASU 2011-11"), which contains new disclosure requirements regarding the nature of an entity's rights of set off and related arrangements associated with its financial instruments and derivative instruments. Under U.S. GAAP, certain derivative and repurchase agreement arrangements are granted exceptions from the general off-setting model. To facilitate comparison between financial statements prepared under U.S. GAAP and IFRS, the new disclosure requirement will provide financial statement users information regarding both gross and net exposures. This guidance is effective for annual and interim financial statements beginning on or after January 1, 2013. Retrospective application is required. The Company does not set off related arrangements associated with its financial instruments and derivative instruments. Its adoption of ASU 2011-11 is not expected to have an impact on its consolidated results of operations or financial condition.
Net Income per Share (Tables)
Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]
The Company computed basic and diluted net income per share attributable to Juniper Networks common stockholders as follows (in millions, except per share amounts):

 
Years Ended December 31,
 
2011
 
2010
 
2009
Numerator:
 
 
 
 
 
Net income attributable to Juniper Networks
$
425.1

 
$
618.4

 
$
117.0

Denominator:
 
 
 
 
 
Weighted-average shares used to compute basic net income per share
529.8

 
522.4

 
523.6

Dilutive effect of employee stock awards
11.6

 
16.4

 
10.4

Weighted-average shares used to compute diluted net income per share
541.4

 
538.8

 
534.0

Net income per share attributable to Juniper Networks common stockholders:
 
 
 
 
 
Basic
$
0.80

 
$
1.18

 
$
0.22

Diluted
$
0.79

 
$
1.15

 
$
0.22

Cash, Cash Equivalents and Investments (Tables)
Cash and cash equivalents [Table Text Block] 
The following table summarizes the Company's cash and cash equivalents (in millions):

 
As of December 31,
 
2011
 
2010
Cash:
 
 
 
Demand deposits
$
633.7

 
$
413.0

Time deposits
926.0

 
273.3

Total cash
1,559.7

 
686.3

Cash equivalents:
 
 
 
U.S. government securities
—

 
76.7

Government-sponsored enterprise obligations
24.5

 
5.0

Commercial paper
10.0

 
4.0

Money market funds
1,316.2

 
1,039.9

Total cash equivalents
1,350.7

 
1,125.6

Total cash and cash equivalents
$
2,910.4

 
$
1,811.9

Unrealized gains and losses, and fair value of available-for-sale and trading securities [Text Block] 
The following table summarizes unrealized gains and losses related to the Company's investments with stated maturities of greater than three months designated as available-for-sale and trading securities, as of December 31, 2011, and 2010 (in millions):

 
Amortized Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Estimated Fair Value
As of December 31, 2011:
 
 
 
 
 
 
 
Fixed income securities:
 
 
 
 
 
 
 
U.S. government securities
$
301.1

 
$
—

 
$
(0.1
)
 
$
301.0

Government-sponsored enterprise obligations
406.3

 
0.3

 
(0.1
)
 
406.5

Foreign government debt securities
—

 
—

 
—

 
—

Certificates of deposit
31.8

 
—

 
—

 
31.8

Asset-backed securities
124.7

 
0.1

 
(0.1
)
 
124.7

Corporate debt securities
508.2

 
1.0

 
(0.5
)
 
508.7

Total fixed income securities
1,372.1

 
1.4

 
(0.8
)
 
1,372.7

Total available-for-sale securities
1,372.1

 
1.4

 
(0.8
)
 
1,372.7

Trading securities:
 
 
 
 
 
 
 
Mutual funds (1)
9.3

 
—

 
—

 
9.3

Total trading securities
9.3

 
—

 
—

 
9.3

Total
$
1,381.4

 
$
1.4

 
$
(0.8
)
 
$
1,382.0

 
 
 
 
 
 
 
 
Reported as:
 
 
 
 
 
 
 
Short-term investments
$
640.9

 
$
0.4

 
$
—

 
$
641.3

Long-term investments
740.5

 
1.0

 
(0.8
)
 
740.7

Total
$
1,381.4

 
$
1.4

 
$
(0.8
)
 
$
1,382.0

________________________________
(1)
Balance includes the Company's non-qualified deferred compensation plan assets. For additional information, see Note 12, Employee Benefits Plans, under the section Deferred Compensation Plan.

 
Amortized Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Estimated Fair Value
As of December 31, 2010:
 
 
 
 
 
 
 
Fixed income securities:
 
 
 
 
 
 
 
U.S. government securities
$
158.2

 
$
0.2

 
$
—

 
$
158.4

Government-sponsored enterprise obligations
213.8

 
0.4

 
(0.2
)
 
214.0

Foreign government debt securities
46.8

 
0.2

 
—

 
47.0

Certificates of deposit
20.9

 
0.1

 
—

 
21.0

Commercial paper
9.5

 
—

 
—

 
9.5

Asset-backed securities
90.1

 
—

 
(0.1
)
 
90.0

Corporate debt securities
459.7

 
2.2

 
(0.2
)
 
461.7

Total fixed income securities
999.0

 
3.1

 
(0.5
)
 
1,001.6

Total available-for-sale securities
999.0

 
3.1

 
(0.5
)
 
1,001.6

Trading securities:
 
 
 
 
 
 
 
Mutual funds (1)
8.1

 
—

 
—

 
8.1

Total trading securities
8.1

 
—

 
—

 
8.1

Total
$
1,007.1

 
$
3.1

 
$
(0.5
)
 
$
1,009.7

 
 
 
 
 
 
 
 
Reported as:
 
 
 
 
 
 
 
Short-term investments
$
473.6

 
$
0.9

 
$
—

 
$
474.5

Long-term investments
533.5

 
2.2

 
(0.5
)
 
535.2

Total
$
1,007.1

 
$
3.1

 
$
(0.5
)
 
$
1,009.7


 
________________________________
(1)
Balance includes the Company's non-qualified deferred compensation plan assets. For additional information, see Note 12, Employee Benefits Plans, under the section Deferred Compensation Plan.
Maturities of available-for-sale investments and publicly-traded securities [Text Block] 
The following table presents the maturities of the Company's available-for-sale securities, as of December 31, 2011 (in millions):
 
Amortized Cost
 
Gross Unrealized Gains
 
Gross Unrealized Losses
 
Estimated Fair Value
Due within one year
$
631.6

 
$
0.4

 
$
—

 
$
632.0

Due between one and five years
740.5

 
1.0

 
(0.8
)
 
740.7

Total
$
1,372.1

 
$
1.4

 
$
(0.8
)
 
$
1,372.7

Trading and available-for-sale investments in an unrealized loss position [Text Block] 
The following tables present the Company's available-for-sale investments that are in an unrealized loss position as of December 31, 2011, and December 31, 2010 (in millions):
 
Less than 12 Months
 
12 Months or Greater
 
Total
 
Fair Value
 
Unrealized Loss
 
Fair Value
 
Unrealized Loss
 
Fair Value
 
Unrealized Loss
As of December 31, 2011
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
$
189.9

 
$
(0.5
)
 
$
—

 
$
—

 
$
189.9

 
$
(0.5
)
U.S. government securities
186.7

 
(0.1
)
 
—

 
—

 
186.7

 
(0.1
)
Government-sponsored enterprise obligations
146.0

 
(0.1
)
 
—

 
—

 
146.0

 
(0.1
)
Asset-backed securities
76.8

 
(0.1
)
 
0.3

*
—

 
77.1

*
(0.1
)
Total
$
599.4

 
$
(0.8
)
 
$
0.3

 
$
—

 
$
599.7

 
$
(0.8
)
________________________________
* Balance includes investments that were in an immaterial unrealized loss position as of December 31, 2011.
 
Less than 12 Months 
 
12 Months or Greater 
 
Total 
 
Fair Value 
 
Unrealized Loss 
 
Fair Value 
 
Unrealized Loss 
 
Fair Value 
 
Unrealized Loss 
As of December 31, 2010
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
$
104.3

 
$
(0.2
)
 
$
28.8

*
$
—

 
$
133.1

*
$
(0.2
)
Government-sponsored enterprise obligations
57.8

 
(0.2
)
 
—

 
—

 
57.8

 
(0.2
)
Foreign government debt securities
—

 
—

 
6.2

*
—

 
6.2

*
—

Commercial paper
5.0

*
—

 
—

 
—

 
5.0

*
—

Asset-backed securities
54.7

 
(0.1
)
 
—

 
—

 
54.7

 
(0.1
)
Total
$
221.8

 
$
(0.5
)
 
$
35.0

 
$
—

 
$
256.8

 
$
(0.5
)
 ________________________________
* Balance includes investments that were in an immaterial unrealized loss position as of December 31, 2010.
Restricted cash and investments [Text Block] 
The following table summarizes the Company's cash and investments that are classified as restricted cash and investments in the consolidated balance sheets (in millions):
 
As of December 31,
 
2011
 
2010
Restricted cash:
 
 
 
Demand deposits
$
0.6

 
$
1.7

Total restricted cash
0.6

 
1.7

Restricted investments:
 
 
 
U.S. government securities
—

 
0.6

Corporate debt securities
1.6

 
2.7

Mutual funds
1.0

 
—

Money market funds
75.1

 
114.3

Total restricted investments
77.7

 
117.6

Total restricted cash and investments
$
78.3

 
$
119.3

Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Assets measured at fair value on a recurring basis [Text Block] 
The following tables provide a summary of assets measured at fair value on a recurring basis and as reported in the consolidated balance sheets (in millions):

 
Fair Value Measurements at December 31, 2011 Using:
 
 
 
Quoted Prices in Active Markets For Identical Assets
 
Significant Other Observable Remaining Inputs
 
Significant Other Unobservable Remaining Inputs
 
 
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Total
Assets measured at fair value:
 
 
 
 
 
 
 
Available-for-sale debt securities:
 
 
 
 
 
 
 
U.S. government securities
$
149.3

 
$
151.7

 
$
—

 
$
301.0

Government-sponsored enterprise obligations
314.2

 
116.8

 
—

 
431.0

Commercial paper
—

 
10.0

 
—

 
10.0

Corporate debt securities (1)
—

 
510.3

 
—

 
510.3

Certificate of deposit
—

 
31.8

 
—

 
31.8

Asset-backed securities
—

 
124.7

 
—

 
124.7

Money market funds (2)
1,391.3

 
—

 
—

 
1,391.3

Total available-for-sale debt securities
1,854.8

 
945.3

 
—

 
2,800.1

Total available-for-sale securities
1,854.8

 
945.3

 
—

 
2,800.1

Trading securities:
 
 
 
 
 
 
 
Mutual funds (3)
10.3

 
—

 
—

 
10.3

Total trading securities
10.3

 
—

 
—

 
10.3

Derivative assets:
 
 
 
 
 
 
 
Foreign exchange contracts
—

 
0.4

 
—

 
0.4

Total derivative assets
—

 
0.4

 
—

 
0.4

Total assets measured at fair value
$
1,865.1

 
$
945.7

 
$
—

 
$
2,810.8

 
 
 
 
 
 
 
 
Liabilities measured at fair value:
 
 
 
 
 
 
 
Derivative liabilities:
 
 
 
 
 
 
 
Foreign exchange contracts
$
—

 
$
(9.6
)
 
$
—

 
$
(9.6
)
Total derivative liabilities
—

 
(9.6
)
 
—

 
(9.6
)
Total liabilities measured at fair value
$
—

 
$
(9.6
)
 
$
—

 
$
(9.6
)
________________________________
(1)
Balance includes $1.6 million of restricted investments measured at fair market value, related to the Company's India Gratuity Trust.
(2)
Balance includes $75.1 million of restricted investments measured at fair market value, related to the Company's D&O trust and acquisition related escrows.
(3)
Balance includes $9.3 million of the Company's non-qualified deferred compensation plan assets and $1.0 million of restricted investments measured at fair market value, related to the Company's India Gratuity Trust.

Assets measured at fair value on a recurring basis [Text Block] 
 
Fair Value Measurements at December 31, 2010 Using:
 
 
 
Quoted Prices in Active Markets For Identical Assets
 
Significant Other Observable Remaining Inputs
 
Significant Other Unobservable Remaining Inputs
 
 
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Total
Assets measured at fair value:
 
 
 
 
 
 
 
Available-for-sale debt securities:
 
 
 
 
 
 
 
U.S. government securities (1)
$
54.9

 
$
180.8

 
$
—

 
$
235.7

Government-sponsored enterprise obligations
208.9

 
10.1

 
—

 
219.0

Foreign government debt securities
21.0

 
26.0

 
—

 
47.0

Commercial paper
—

 
13.5

 
—

 
13.5

Corporate debt securities (2)
2.7

 
461.7

 
—

 
464.4

Certificate of deposit
—

 
21.0

 
—

 
21.0

Asset-backed securities
—

 
90.0

 
—

 
90.0

Money market funds (3)
1,154.2

 
—

 
—

 
1,154.2

Total available-for-sale debt securities
1,441.7

 
803.1

 
—

 
2,244.8

Total available-for-sale securities
1,441.7

 
803.1

 
—

 
2,244.8

Trading securities:
 
 
 
 
 
 
 
Mutual funds
8.1

 
—

 
—

 
8.1

Total trading securities
8.1

 
—

 
—

 
8.1

Derivative assets:
 
 
 
 
 
 
 
Foreign exchange contracts
—

 
0.4

 
—

 
0.4

Total derivative assets
—

 
0.4

 
—

 
0.4

Total assets measured at fair value
$
1,449.8

 
$
803.5

 
$
—

 
$
2,253.3

 
 
 
 
 
 
 
 
Liabilities measured at fair value:
 
 
 
 
 
 
 
Derivative liabilities:
 
 
 
 
 
 
 
Foreign exchange contracts
$
—

 
$
(2.6
)
 
$
—

 
$
(2.6
)
Total derivative liabilities
—

 
(2.6
)
 
—

 
(2.6
)
Total liabilities measured at fair value
$
—

 
$
(2.6
)
 
$
—

 
$
(2.6
)
________________________________
(1)
Balance includes $0.6 million of restricted investments measured at fair market value, related to an acquisition completed in 2005. For additional information regarding the Company's restricted investments, see Note 4, Cash, Cash Equivalents, and Investments, under the heading “Restricted Cash and Investments.” Restricted investments are included in the restricted cash balance in the consolidated balance sheet.
(2)
Balance includes $2.7 million of restricted investments measured at fair market value, related to the Company's India Gratuity Trust.
(3)
Balance includes $114.3 million of restricted investments measured at fair market value, related to the Company's D&O trust and acquisition related escrows.
Fair Value, by Balance Sheet Grouping [Text Block] 
 
Fair Value Measurements at December 31, 2011 Using:
 
 
 
Quoted Prices in Active Markets For Identical Assets
 
Significant Other Observable Remaining Inputs
 
Significant Other Unobservable Remaining Inputs
 
 
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Total
Total assets measured at fair value, reported as:
 
 
 
 
 
 
 
Cash equivalents
$
1,316.2

 
$
34.5

 
$
—

 
$
1,350.7

Short-term investments
168.9

 
472.4

 
—

 
641.3

Long-term investments
303.9

 
436.8

 
—

 
740.7

Restricted cash and investments
76.1

 
1.6

 
—

 
77.7

Prepaid expenses and other current assets
—

 
0.4

 
—

 
0.4

Total assets measured at fair value
$
1,865.1

 
$
945.7

 
$
—

 
$
2,810.8

Total liabilities measured at fair value, reported as:
 
 
 
 
 
 
 
Other accrued liabilities
$
—

 
$
(9.6
)
 
$
—

 
$
(9.6
)
Total liabilities measured at fair value
$
—

 
$
(9.6
)
 
$
—

 
$
(9.6
)
Fair Value, by Balance Sheet Grouping [Text Block] 
 
Fair Value Measurements at December 31, 2010 Using:
 
 
 
Quoted Prices in Active Markets For Identical Assets
 
Significant Other Observable Remaining Inputs
 
Significant Other Unobservable Remaining Inputs
 
 
 
(Level 1)
 
(Level 2)
 
(Level 3)
 
Total
Total assets measured at fair value, reported as:
 
 
 
 
 
 
 
Cash equivalents
$
1,039.9

 
$
85.7

 
$
—

 
$
1,125.6

Short-term investments
150.7

 
323.8

 
—

 
474.5

Long-term investments
142.2

 
393.0

 
—

 
535.2

Restricted cash
117.0

 
0.6

 
—

 
117.6

Prepaid expenses and other current assets
—

 
0.4

 
—

 
0.4

Total assets measured at fair value
$
1,449.8

 
$
803.5

 
$
—

 
$
2,253.3

Total liabilities measured at fair value, reported as:
 
 
 
 
 
 
 
Other accrued liabilities
$
—

 
$
(2.6
)
 
$
—

 
$
(2.6
)
Total liabilities measured at fair value
$
—

 
$
(2.6
)
 
$
—

 
$
(2.6
)
Derivative Instruments (Tables)
Schedule of Derivative Instruments [Table Text Block]
The notional amount of Company's foreign currency derivatives are summarized as follows (in millions):
 
As of December 31,
 
2011
 
2010
Cash flow hedges
$
184.3

 
$
110.4

Non-designated hedges
122.7

 
74.4

     Total
$
307.0

 
$
184.8

Business Combination (Tables)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Business Combinations [Abstract]
 
 
Schedule of Purchase Price Allocation [Table Text Block]
Text Block 
 
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
 
Text Block 
Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block]
Text Block 
 
Schedule of Purchase Price Allocation [Table Text Block] 
Total purchase consideration for these acquisitions at the acquisition dates was allocated as follows (in millions):
 
Allocation of purchase consideration:
2011 Acquisitions
 
2010 Acquisitions
Net tangible assets acquired
$
1.7

 
$
8.8

Intangible assets acquired
28.4

 
116.5

Goodwill
0.4

 
269.2

    Total
$
30.5

 
$
394.5

Schedule of Business Acquisitions, by Acquisition [Table Text Block] 
Total purchase consideration for these acquisitions is summarized as follows (in millions):
 
Ankeena
 
SMobile
 
Altor
 
Trapeze
 
Total
Net cash
$
66.5

 
$
69.5

 
$
104.0

 
$
152.1

 
$
392.1

Assumed stock option and RSU awards allocated to purchase price (1)
2.4

 
—

 
—

 
—

 
2.4

Total
$
68.9

 
$
69.5

 
$
104.0

 
$
152.1

 
$
394.5

________________________________

(1)
The fair value of the stock option and RSU awards assumed was based on the acquired company's determined value on the acquisition date.
Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block] 
The following table presents details of the intangible assets acquired through the business combinations completed in 2011, as of December 31, 2011 (in millions, except years):  
 
2011 Acquisitions
 
Estimated Useful Life (In Years)
Amount
Existing or Core technology
10
$
21.9

Support agreements and related relationships
4
5.1

Patents
5
1.4

Total
 
$
28.4


The following table presents details of the intangible assets acquired through the business combinations completed during 2010, as of December 31, 2011 (in millions, except years):
 
2010 Acquisitions
 
Ankeena
 
SMobile
 
Altor
 
Trapeze
 
 
 
Estimated Useful Life (In Years)
 
Amount
 
Estimated Useful Life (In Years)
 
Amount
 
Estimated Useful Life (In Years)
 
Amount
 
Estimated Useful Life (In Years)
 
Amount
 
Total Amount
Existing technology
4.0

 
$
9.0

 
5.0

 
$
24.3

 
6.0

 
$
13.9

 
5.0

 
$
45.0

 
$
92.2

In-process research and development
—

 
—

 
—

 
—

 
—

 
2.8

 
—

 
—

 
2.8

Core technology
4.0

 
3.2

 
—

 
—

 
6.0

 
4.6

 
—

 
—

 
7.8

Customer contracts and related relationships
—

 
—

 
6.0

 
2.1

 
—

 
—

 
7.0

 
8.6

 
10.7

Support agreements and related relationships
—

 
—

 
6.0

 
0.1

 
—

 
—

 
7.0

 
2.6

 
2.7

Non-compete agreements
—

 
—

 
2.0

 
0.1

 
—

 
—

 
—

 
—

 
0.1

OEM customer contracts
—

 
—

 
—

 
—

 
—

 
—

 
2.0

 
0.2

 
0.2

Total
 
 
$
12.2

 
 
 
$
26.6

 
 
 
$
21.3

 
 
 
$
56.4

 
$
116.5

Goodwill and Purchased Intangible Assets (Tables)
Goodwill by segment [Text Block] 
The following table summarizes the Company's goodwill activities by segment (in millions):

 
Infrastructure
 
SLT
 
Total
December 31, 2009
$
1,500.5

 
$
2,158.1

 
$
3,658.6

Adjustment to goodwill
—

 
0.2

 
0.2

Additions due to business combinations
142.9

 
126.1

 
269.0

December 31, 2010
1,643.4

 
2,284.4

 
3,927.8

Adjustments to goodwill
1.7

 
(1.8
)
 
(0.1
)
Additions due to business combinations
0.4

 
—

 
0.4

December 31, 2011
$
1,645.5

 
$
2,282.6

 
$
3,928.1

Schedule of finite-lived and indefinite-lived intangible assets by major class [Text Block] 
Changes to the Company’s purchased intangible assets were as follows (in millions):
 
Gross
 
Accumulated Amortization
 
Net
As of December 31, 2011:
 
 
 
 
 
Intangible assets with finite lives:
 
 
 
 
 
Technologies and patents
$
499.5

 
$
(404.2
)
 
$
95.3

Other
91.5

 
(66.5
)
 
25.0

Total intangible assets with finite lives
591.0

 
(470.7
)
 
120.3

IPR&D with indefinite lives
2.8

 
—

 
2.8

Total purchased intangible assets
$
593.8

 
$
(470.7
)
 
$
123.1

 
 
 
 
 
 
As of December 31, 2010:
 
 
 
 
 
Intangible assets with finite lives:
 
 
 
 
 
Technologies and patents
$
471.1

 
$
(381.4
)
 
$
89.7

Other
86.4

 
(62.2
)
 
24.2

Total intangible assets with finite lives
557.5

 
(443.6
)
 
113.9

IPR&D with indefinite lives
7.9

 
—

 
7.9

Total purchased intangible assets
$
565.4

 
$
(443.6
)
 
$
121.8

Estimated future amortization expense of purchased intangible assets with definite lives [Text Block] 
The estimated future amortization expense of purchased intangible assets with finite lives is as follows (in millions):
Years Ending December 31,
 
Amount
2012
 
$
27.4

2013
 
27.2

2014
 
25.3

2015
 
20.4

2016
 
7.7

Thereafter
 
12.3

Total
 
$
120.3

Other Financial Information (Tables)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Other Financial Information [Abstract]
 
 
Inventory, Current [Table Text Block]
Text Block 
 
Property, Plant and Equipment [Table Text Block]
Text Block 
 
Deferred revenue [Table Text Block]
Text Block 
 
Warranties [Table Text Block]
Text Block 
 
Changes in restructuring liability [Table Text Block]
Text Block 
Text Block 
Interest and other income, net [Table Text Block]
Text Block 
 
Inventory, Current [Table Text Block] 
Inventories, net

The Company's inventories are stated at the lower of standard cost or market, which approximates actual cost. Inventories, net are reported within prepaid expenses and other current assets on the consolidated balance sheet and consist of the following (in millions):
 
As of December 31,
 
2011
 
2010
Inventories, net
 
 
 
Production materials
$
52.4

 
$
5.8

Finished goods
16.7

 
15.8

Total inventories, net
$
69.1

 
$
21.6


Property, Plant and Equipment [Table Text Block] 
Property and equipment consist of the following (in millions):
 
As of December 31,
 
2011
 
2010
Computers and equipment
$
604.6

 
$
514.3

Software
110.2

 
101.6

Leasehold improvements
204.1

 
179.0

Furniture and fixtures
27.4

 
24.9

Building and building improvements
6.2

 
—

Land and land improvements
208.2

 
203.7

Construction-in-process
99.7

 
41.9

Property and equipment, gross
1,260.4

 
1,065.4

Accumulated depreciation
(661.8
)
 
(571.5
)
Property and equipment, net
$
598.6

 
$
493.9

Deferred revenue [Table Text Block] 
Details of the Company's deferred revenue were as follows (in millions):
 
As of December 31,
 
2011
 
2010
Deferred product revenue:
 
 
 
Undelivered product commitments and other product deferrals
$
288.1

 
$
294.1

Distributor inventory and other sell-through items
134.0

 
143.4

Deferred gross product revenue
422.1

 
437.5

Deferred cost of product revenue
(136.9
)
 
(148.8
)
Deferred product revenue, net
285.2

 
288.7

Deferred service revenue
681.8

 
595.7

Total
$
967.0

 
$
884.4

Reported as:
 
 
 
Current
$
712.6

 
$
660.2

Long-term
254.4

 
224.2

Total deferred revenue
$
967.0

 
$
884.4

Warranties [Table Text Block] 
Changes in the Company’s warranty reserve were as follows (in millions):
 
As of December 31,
 
2011
 
2010
Beginning balance
$
35.9

 
$
38.2

Provisions made during the period, net
52.5

 
49.9

Change in estimate
(12.6
)
 
(3.0
)
Actual costs incurred during the period
(47.5
)
 
(49.2
)
Ending balance
$
28.3

 
$
35.9

Changes in restructuring liability [Table Text Block] 
 
Remaining Liability as of
December 31, 2010
 
Charges
 
Cash payments
 
Non-cash Settlements and Other Adjustments
 
Remaining Liability as of
December 31, 2011
Facilities
$
7.7

 
$
0.2

 
$
(5.3
)
 
$
(1.6
)
 
$
1.0

Severance, contractual commitments, and other charges
0.2

 
16.9

 
(13.3
)
 
(0.7
)
 
3.1

Total
$
7.9

 
$
17.1

 
$
(18.6
)
 
$
(2.3
)
 
$
4.1

Changes in restructuring liability [Table Text Block] 
 
Remaining Liability as of
December 31, 2009
 
Charges
 
Cash payments
 
Non-cash Settlements and Other Adjustments
 
Remaining Liability as of
December 31, 2010
Facilities
$
4.9

 
$
6.9

 
$
(2.5
)
 
$
(1.6
)
 
$
7.7

Severance, contractual commitments, and other charges
4.5

 
3.9

 
(5.5
)
 
(2.7
)
 
0.2

Total
$
9.4

 
$
10.8

 
$
(8.0
)
 
$
(4.3
)
 
$
7.9

Interest and other income, net [Table Text Block] 
Other expense and income, net consists of the following (in millions):
 
Years Ended December 31,
 
2011
 
2010
 
2009
Interest income
$
9.7

 
$
10.5

 
$
11.8

Interest expense
(49.5
)
 
(8.7
)
 
(6.0
)
Other income and expense, net
(7.0
)
 
8.8

 
(4.6
)
Other (expense) income, net
$
(46.8
)
 
$
10.6

 
$
1.4

Financing (Tables)
Long-term Debt [Table Text Block]
The following table summarizes the Company's long-term debt entered into in 2011 (in millions, except percentages):
 
As of
 
December 31, 2011
 
Amount
 
Effective Interest Rate
3.10% fixed-rate Notes, due 2016
$
300.0

 
3.12
%
4.60% fixed-rate Notes, due 2021
300.0

 
4.63
%
5.95% fixed-rate Notes, due 2041
400.0

 
6.01
%
Total Notes
1,000.0

 
 
Unaccreted discount
(1.0
)
 
 
Total long-term debt
$
999.0

 
 
Equity (Tables)
Comprehensive Income (Loss) Note [Table Text Block]
Comprehensive income attributable to Juniper Networks consists of the following (in millions):

 
Years Ended December 31,
 
2011
 
2010
 
2009
Consolidated net income
$
425.0

 
$
619.4

 
$
115.2

Other comprehensive income (loss), net:
 
 
 
 
 
Change in unrealized gain (loss) on investments, net
(9.9
)
 
(0.3
)
 
(2.8
)
Change in foreign currency translation adjustment, net
(6.4
)
 
0.5

 
5.6

Total other comprehensive income (loss), net
(16.3
)
 
0.2

 
2.8

Consolidated comprehensive income
408.7

 
619.6

 
118.0

Adjust for comprehensive loss (income) attributable to noncontrolling interest, net
0.1

 
(1.0
)
 
1.8

Comprehensive income attributable to Juniper Networks
$
408.8

 
$
618.6

 
$
119.8

Employee Benefit Plans (Tables)
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] 
The following table summarizes the Company’s stock option activity and related information as of and for the three years ended December 31, 2011 (in millions, except for per share amounts and years):

 
Outstanding Options
 
Number of Shares
 
Weighted Average
Exercise Price per Share
 
Weighted Average Remaining Contractual Term (In Years)
 
Aggregate Intrinsic Value
Balance at December 31, 2008
73.6

 
$
21.24

 
 
 
 
Options granted
9.9

 
17.86

 
 
 
 
Options canceled
(2.3
)
 
21.57

 
 
 
 
Options exercised
(8.6
)
 
14.59

 
 
 
 
Options expired
(5.2
)
 
34.91

 
 
 
 
Balance at December 31, 2009
67.4

 
20.84

 
4.6

 
$
451.2

Options granted
6.2

 
29.15

 
 
 
 
Options assumed (1)
0.5

 
31.65

 
 
 
 
Options canceled
(2.3
)
 
22.03

 
 
 
 
Options exercised
(21.6
)
 
18.99

 
 
 
 
Options expired
(0.8
)
 
61.48

 
 
 
 
Balance at December 31, 2010
49.4

 
21.90

 
4.1

 
$
744.5

Options granted
5.6

 
37.17

 
 
 
 
Options canceled
(1.9
)
 
26.76

 
 
 
 
Options exercised
(13.9
)
 
21.13

 
 
 
 
Options expired
(0.6
)
 
34.32

 
 
 
 
Balance at December 31, 2011
38.6

 
$
23.98

 
3.7

 
$
75.3

 
 
 
 
 
 
 
 
As of December 31, 2011:
 
 
 
 
 
 
 
Vested or expected-to-vest options
36.9

 
$
23.66

 
3.7

 
$
74.2

Exercisable options
26.1

 
$
21.51

 
3.0

 
$
61.7


(1)
Stock options assumed in connection with the acquisition of Ankeena and Altor.

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] 
The following table summarizes information about stock options outstanding under all option plans as of December 31, 2011:
 
 
 
Options Outstanding 
 
Options Exercisable 
Range of Exercise Price 
 
Number Outstanding 
 
Weighted-Average Remaining Contractual Life 
 
Weighted-Average Exercise Price 
 
Number Exercisable 
 
Weighted-Average Exercise Price 
 
 
(In millions) 
 
(In years) 
 
(In dollars) 
 
(In millions) 
 
(In dollars) 
$0.33 - $14.91
 
4.3

 
2.2

 
$
10.84

 
3.7

 
$
10.45

$15.00 - $15.09
 
4.0

 
3.5

 
15.07

 
2.7

 
15.06

$15.32 - $18.96
 
4.4

 
2.5

 
17.69

 
3.9

 
17.78

$19.45 - $22.74
 
4.0

 
3.8

 
21.27

 
2.7

 
21.36

$22.97 - $25.16
 
5.7

 
3.1

 
24.47

 
5.3

 
24.44

$25.19 - $26.90
 
4.6

 
3.9

 
26.33

 
3.2

 
26.35

$26.97 - $29.89
 
4.9

 
4.8

 
28.58

 
2.5

 
28.46

$29.93 - $38.93
 
3.2

 
4.3

 
33.35

 
2.1

 
32.77

$40.26 - $44.00
 
3.5

 
6.2

 
41.87

 
—

 
—


 
38.6

 
3.7

 
$
23.98

 
26.1

 
$
21.51

Schedule of Nonvested Share Activity [Table Text Block] 
The following table summarizes the Company’s RSU and PSA activity and related information as of and for the three years ended December 31, 2011 (in millions, except per share amounts and years):

 
Outstanding RSUs and PSAs
 
Number of Shares
 
Weighted Average Grant-Date Fair Value per Share
 
Weighted Average Remaining Contractual Term (In Years)
 
Aggregate Intrinsic Value
Balance at January 1, 2009
6.7

 
$
24.59

 
 
 
 
RSUs granted
1.8

 
$
17.87

 
 
 
 
PSAs granted
2.9

 
$
18.05

 
 
 
 
RSUs vested
(1.3
)
 
$
21.05

 
 
 
 
PSAs vested
(0.1
)
 
$
26.90

 
 
 
 
RSUs canceled
(0.7
)
 
$
24.67

 
 
 
 
     PSAs canceled
(0.2
)
 
$
19.12

 
 
 
 
Balance at December 31, 2009
9.1

 
$
21.76

 
1.6

 
$
243.3

RSUs granted
4.0

 
$
30.19

 
 
 
 
RSUs assumed (1)
0.5

 
$
32.09

 
 
 
 
PSAs granted
3.8

 
$
29.25

 
 
 
 
RSUs vested
(1.8
)
 
$
25.30

 
 
 
 
PSAs vested
(0.4
)
 
$
20.64

 
 
 
 
RSUs canceled
(0.6
)
 
$
24.87

 
 
 
 
     PSAs canceled
(0.4
)
 
$
22.57

 
 
 
 
Balance at December 31, 2010
14.2

 
$
25.94

 
1.7

 
$
522.9

RSUs granted
7.3

 
$
31.75

 
 
 
 
PSAs granted (2)
4.5

 
$
38.64

 
 
 
 
RSUs vested
(1.7
)
 
$
23.26

 
 
 
 
PSAs vested
(0.8
)
 
$
24.76

 
 
 
 
RSUs canceled
(1.0
)
 
$
31.57

 
 
 
 
     PSAs canceled
(2.9
)
 
$
30.72

 
 
 
 
Balance at December 31, 2011
19.6

 
$
30.27

 
1.5

 
$
400.5

 
 
 
 
 
 
 
 
As of December 31, 2011:
 
 
 
 
 
 
 
Vested and expected-to-vest RSUs and PSAs
16.7

 
$
29.97

 
1.3

 
$
341.0

________________________________
(1)
RSUs assumed in connection with the acquisitions of Ankeena and Altor.
(2)
The number of shares subject to PSAs granted represents the aggregate maximum number of shares that may be issued pursuant to the award over its full term. The aggregate number of shares subject to these PSAs that would be issued if performance goals determined by the Compensation Committee are achieved is estimated at 1.9 million shares. Depending on achievement of such performance goals, the range of shares that could be issued under these awards is 0 to 4.5 million shares.
Shares available for grant [Table Text Block] 
The following table presents the stock grant activity and the total number of shares available for grant under the 2006 Plan as of December 31, 2011 (in millions):
 
Number of Shares
Balance at January 1, 2011
30.7

Additional authorized share reserve approved by stockholders
30.0

RSUs and PSAs granted (1)
(24.6
)
Options granted
(5.6
)
RSUs and PSAs canceled (1)
8.1

Options canceled (2)
1.9

Options expired (2)
0.6

Balance at December 31, 2011
41.1

________________________________
(1)
RSUs and PSAs with a per share or unit purchase price lower than 100% of the fair market value of the Company's common stock on the day of the grant under the 2006 Plan are counted against shares authorized under the plan as two and one-tenth shares of common stock for each share subject to such award. The number of shares subject to PSAs granted represents the maximum number of shares that may be issued pursuant to the award over its full term.
(2)
Includes canceled or expired options under the 1996 Plan and the 2000 Plan that expired unexercised after May 18, 2006, which become available for grant under the 2006 Plan according to its terms.
Estimates of Weighted Average Fair Value Per Share Under Employee Purchase Plan And Stock Purchase Plan [Table Text Block] 
The weighted-average assumptions used and the resulting estimates of fair value for employee stock options and the employee stock purchase plan during the three years ended December 31, 2011 were:
 
Years Ended December 31,
 
2011
 
2010
 
2009
Employee Stock Options:
 
 
 
 
 
Volatility factor
43%
 
38%
 
50%
Risk-free interest rate
1.5%
 
2.0%
 
1.6%
Expected life (years)
4.1
 
4.3
 
4.2
Dividend yield
—
 
—
 
—
Weighted-average fair value per share
$13.17
 
$9.77
 
$7.41
 
 
 
 
 
 
Employee Stock Purchase Plan:
 
 
 
 
 
Volatility factor
41%
 
35%
 
54%
Risk-free interest rate
0.2%
 
0.2%
 
0.4%
Expected life (years)
0.5
 
0.5
 
0.5
Dividend yield
—
 
—
 
—
Weighted-average fair value per share
$7.48
 
$6.55
 
$5.54
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] 
The Company’s share-based compensation expense associated with stock options, employee stock purchases, RSUs, and PSAs is recorded in the following cost and expense categories for the three years ended December 31, 2011 (in millions):

 
Years Ended December 31,
 
2011
 
2010
 
2009
Cost of revenues - Product
$
4.6

 
$
4.4

 
$
3.9

Cost of revenues - Service
15.7

 
13.5

 
10.5

Research and development
97.7

 
78.5

 
59.3

Sales and marketing
70.9

 
54.9

 
43.1

General and administrative
33.3

 
30.7

 
22.9

Total
$
222.2

 
$
182.0

 
$
139.7

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] 
The following table summarizes share-based compensation expense by award type (in millions):

 
Years Ended December 31,
 
2011
 
2010
 
2009
Options
$
76.2

 
$
81.5

 
$
81.2

Assumed options
—

 
0.8

 
—

RSUs and PSAs
123.1

 
81.8

 
44.1

Assumed RSUs
—

 
0.6

 
—

Employee stock purchase plan
18.5

 
13.1

 
14.4

Other acquisition-related compensation
4.4

 
4.2

 
—

Total
$
222.2

 
$
182.0

 
$
139.7

Segments (Tables)
Financial information for each segment [Table Text Block] 
The following table summarizes financial information for each segment used by the CODM for the three years ended December 31, 2011 (in millions):
 
Years Ended December 31,
 
2011
 
2010
 
2009
Net revenues:
 
 
 
 
 
Infrastructure:
 
 
 
 
 
Routers
$
2,894.4

 
$
2,655.7

 
$
2,244.2

Switches
528.2

 
394.6

 
197.4

Total Infrastructure
3,422.6

 
3,050.3

 
2,441.6

SLT
1,026.1

 
1,043.0

 
874.3

Total net revenues
$
4,448.7

 
$
4,093.3

 
$
3,315.9

Segment operating income:
 
 
 
 
 
Infrastructure
$
718.3

 
$
773.7

 
$
541.4

SLT
199.0

 
208.0

 
127.0

Total segment operating income
917.3

 
981.7

 
668.4

Amortization of purchased intangible assets (1)
(27.1
)
 
(8.6
)
 
(15.4
)
Share-based compensation expense
(222.2
)
 
(182.0
)
 
(139.7
)
Share-based payroll tax expense
(9.3
)
 
(6.4
)
 
(0.8
)
Restructuring and other charges
(30.6
)
 
(10.8
)
 
(19.5
)
Acquisition-related and other charges (2)
(9.6
)
 
(6.3
)
 
(182.3
)
Total operating income
618.5

 
767.6

 
310.7

Other (expense) income, net
(46.8
)
 
10.6

 
1.4

Income before income taxes and noncontrolling interest
$
571.7

 
$
778.2

 
$
312.1

________________________________
(1)
Amount includes amortization expense of purchased intangible assets in operating expenses and in cost of revenues.
(2)
Amount includes acquisition-related costs in operating expenses and in cost of revenues.

Net revenues by geographic region [Table Text Block] 
The Company attributes revenues to geographic region based on the customer’s ship-to location. The following table shows net revenues by geographic region (in millions):
 
Years Ended December 31,
 
2011
 
2010
 
2009
Americas:
 
 
 
 
 
United States
$
2,015.8

 
$
1,890.1

 
$
1,515.1

Other
222.2

 
205.5

 
172.8

Total Americas
2,238.0

 
2,095.6

 
1,687.9

Europe, Middle East, and Africa
1,339.8

 
1,189.3

 
953.2

Asia Pacific
870.9

 
808.4

 
674.8

Total
$
4,448.7

 
$
4,093.3

 
$
3,315.9


Income Taxes Income Taxes (Tables)
Components Of Income Loss [Table Text Block] 
The components of income before the provision for income taxes and noncontrolling interest are summarized as follows (in millions):  
 
Years Ended December 31, 
 
2011
 
2010
 
2009
Domestic
$
218.4

 
$
370.6

 
$
50.1

Foreign
353.3

 
407.6

 
262.0

Total income before provision for income taxes and noncontrolling interest
$
571.7

 
$
778.2

 
$
312.1

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] 
The provision for income taxes is summarized as follows (in millions):  
 
Years Ended December 31, 
 
2011
 
2010
 
2009
Current provision (benefit):
 

 
 

 
 

Federal
$
19.5

 
$
(8.4
)
 
$
123.8

State
0.9

 
1.0

 
21.4

Foreign
47.8

 
44.2

 
43.5

Total current provision
68.2

 
36.8

 
188.7

Deferred provision (benefit):
 
 
 
 
 
Federal
23.0

 
57.5

 
(42.7
)
State
0.6

 
14.0

 
55.7

Foreign
(3.6
)
 
(7.5
)
 
(5.9
)
Total deferred provision
20.0

 
64.0

 
7.1

Income tax benefits attributable to employee stock plan activity
58.5

 
58.0

 
1.0

Total provision for income taxes
$
146.7

 
$
158.8

 
$
196.8

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] 
The provision for income taxes differs from the amount computed by applying the federal statutory rate to income before provision for income taxes as follows (in millions):  
 
Years Ended December 31, 
 
2011
 
2010
 
2009
Expected provision at 35% rate
$
200.1

 
$
272.4

 
$
109.2

State taxes, net of federal benefit
2.0

 
6.2

 
(1.6
)
Foreign income at different tax rates
(50.4
)
 
(71.5
)
 
(33.8
)
R&D credits
(21.3
)
 
(18.6
)
 
(14.4
)
Stock-based compensation
16.7

 
(40.2
)
 
62.1

Temporary differences not currently benefited
—

 
10.2

 
72.8

Other
(0.4
)
 
0.3

 
2.5

Total provision for income taxes
$
146.7

 
$
158.8

 
$
196.8

Schedule of Deferred Tax Assets and Liabilities [Table Text Block] 
Significant components of the Company's deferred tax assets and liabilities are as follows (in millions):
 
As of December 31, 
 
2011
 
2010
Deferred tax assets:
 

 
 

Net operating loss carry-forwards
$
4.4

 
$
14.1

Foreign tax credit carry-forwards
48.7

 
40.3

Research and other credit carry-forwards
86.3

 
68.2

Deferred revenue
94.0

 
86.1

Stock-based compensation
91.2

 
75.6

Reserves and accruals not currently deductible
255.9

 
227.6

Other
31.0

 
26.8

Total deferred tax assets
611.5

 
538.7

Valuation allowance
(145.2
)
 
(122.2
)
Deferred tax assets, net of valuation allowance
466.3

 
416.5

Deferred tax liabilities:
 
 
 
Property and equipment basis differences
(87.0
)
 
(47.1
)
Purchased intangibles
(53.2
)
 
(58.5
)
Unremitted foreign earnings
(210.5
)
 
(175.1
)
Other
—

 
(0.1
)
Total deferred tax liabilities
(350.7
)
 
(280.8
)
Net deferred tax assets
$
115.6

 
$
135.7

Unrecognized Tax Benefits [Table Text Block] 
A reconciliation of the beginning and ending amount of the Company's total gross unrecognized tax benefits for the years ended December 31, 2011, 2010, and 2009 was as follows (in millions):
 
 
As of December 31,
 
2011
 
2010
 
2009
Balance beginning of the year
$
116.4

 
$
183.6

 
$
113.5

Tax positions related to current year:
 
 
 
 
 
Additions
17.6

 
13.9

 
12.7

Tax positions related to prior years:
 
 
 
 
 
Additions
6.4

 
—

 
73.5

Reductions
—

 
(73.8
)
 
(1.0
)
Settlements
(5.4
)
 
(1.6
)
 
(12.8
)
Lapses in statutes of limitations
(2.8
)
 
(5.7
)
 
(2.3
)
Balance end of the year
$
132.2

 
$
116.4

 
$
183.6

Commitments and Contingencies (Tables)
Summary of principal contractual obligations [Table Text Block]
The following table summarizes the Company’s future principal contractual obligations as of December 31, 2011 (in millions):
 
 
 
Years Ending December 31,
 
 
 
Total
 
2012
 
2013
 
2014
 
2015
 
2016
 
Thereafter
 
Other
Operating leases
$
352.7

 
$
57.9

 
$
50.8

 
$
63.8

 
$
53.4

 
$
26.6

 
$
100.2

 
$
—

Purchase commitments
150.6

 
150.6

 
—

 
—

 
—

 
—

 
—

 
—

Tax liabilities
108.5

 
—

 
—

 
—

 
—

 
—

 
—

 
108.5

Long-term debt
1,000.0

 
—

 
—

 
—

 
—

 
300.0

 
700.0

 
—

Interest payment on long-term debt
873.1

 
46.9

 
46.9

 
46.9

 
46.9

 
41.9

 
643.6

 
—

Other contractual obligations
73.1

 
63.3

 
4.8

 
3.0

 
2.0

 
—

 
—

 
—

Total
$
2,558.0

 
$
318.7

 
$
102.5

 
$
113.7

 
$
102.3

 
$
368.5

 
$
1,443.8

 
$
108.5

Selected Quarterly Financial Information (Tables)
Schedule of Quarterly Financial Information [Table Text Block]
Selected Quarterly Financial Data (Unaudited)
 

The table below sets forth selected unaudited financial data for each quarter of the two years ended December 31, 2011 (in millions, except per share amounts):

 
Year Ended December 31, 2011
First Quarter
 
Second Quarter
 
Third Quarter
 
Fourth Quarter
Net revenues:
 

 
 

 
 

 
 

Product
$
877.4

 
$
891.4

 
$
861.9

 
$
847.5

Service
224.2

 
229.1

 
243.9

 
273.3

Total net revenues
1,101.6

 
1,120.5

 
1,105.8

 
1,120.8

Cost of revenues:
 
 
 
 
 
 
 
Product (2)
265.7

 
292.4

 
286.6

 
310.6

Service
100.0

 
105.9

 
107.6

 
111.3

Total cost of revenues
365.7

 
398.3

 
394.2

 
421.9

Gross margin
735.9

 
722.2

 
711.6

 
698.9

Operating expenses:
 
 
 
 
 
 
 
Research and development
262.0

 
257.3

 
257.1

 
250.5

Sales and marketing
246.3

 
246.6

 
254.9

 
253.2

General and administrative
44.9

 
44.3

 
44.5

 
45.5

Amortization of purchased intangibles
1.5

 
1.3

 
1.3

 
1.2

Restructuring and other charges (1)
(0.3
)
 
(0.9
)
 
16.8

 
15.0

Acquisition-related and other charges (2)
4.1

 
2.7

 
—

 
0.3

Total operating expenses
558.5

 
551.3

 
574.6

 
565.7

Operating income
177.4

 
170.9

 
137.0

 
133.2

Interest and other income (expense), net
(6.5
)
 
(13.7
)
 
(15.9
)
 
(10.7
)
Income before income taxes and noncontrolling interest
170.9

 
157.2

 
121.1

 
122.5

Income tax provision
41.3

 
41.7

 
37.4

 
26.3

Consolidated net income
129.6

 
115.5

 
83.7

 
96.2

Adjust for net loss attributable to noncontrolling interest
0.1

 
—

 
—

 
—

Net income attributable to Juniper Networks
$
129.7

 
$
115.5

 
$
83.7

 
$
96.2

Net income per share attributable to Juniper Networks common stockholders: (3)
 
 
 
 
 
 
 
Basic
$
0.24

 
$
0.22

 
$
0.16

 
$
0.18

Diluted
$
0.24

 
$
0.21

 
$
0.16

 
$
0.18


(1) Restructuring and other charges consisted of restructuring charges and asset impairment charges. In the third quarter of 2011, the Company implemented the 2011 Restructuring Plan for workforce reduction and recorded restructuring charges of $16.8 million. In the fourth quarter of 2011, the Company recorded a charge of $13.5 million associated with an abandoned in-process internal used software project.
(2) Acquisition-related and other charges comprised of direct and indirect costs such as financial advisory, legal, and due diligence, as well as integration costs related to the acquisitions completed in 2010 and 2011.
(3) Net income per share attributable to Juniper Network stockholders is computed independently. Therefore, the sum of the quarterly net income per share may not equal the total computed for the fiscal year or any cumulative interim period.




 
Year Ended December 31, 2010
First Quarter
 
Second Quarter
 
Third Quarter
 
Fourth Quarter
Net revenues:
 

 
 

 
 

 
 

Product
$
721.2

 
$
774.1

 
$
801.2

 
$
962.2

Service
191.4

 
204.2

 
211.2

 
227.8

Total net revenues
912.6

 
978.3

 
1,012.4

 
1,190.0

Cost of revenues:
 
 
 
 
 
 
 
Product
222.4

 
231.8

 
247.0

 
299.7

Service
78.2

 
86.6

 
87.6

 
98.3

Total cost of revenues
300.6

 
318.4

 
334.6

 
398.0

Gross margin
612.0

 
659.9

 
677.8

 
792.0

Operating expenses:
 
 
 
 
 
 
 
Research and development
207.0

 
224.8

 
231.2

 
254.9

Sales and marketing
192.4

 
202.3

 
204.7

 
257.7

General and administrative
43.1

 
45.9

 
43.8

 
45.1

Amortization of purchased intangibles
1.1

 
1.2

 
0.9

 
0.9

Restructuring charges (1)
8.1

 
0.2

 
0.2

 
2.3

Acquisition-related charges (2)
—

 
0.5

 
1.5

 
4.3

Total operating expenses
451.7

 
474.9

 
482.3

 
565.2

Operating income
160.3

 
185.0

 
195.5

 
226.8

Other income (expense), net
1.4

 
4.0

 
0.2

 
4.8

Income before income taxes and noncontrolling interest
161.7

 
189.0

 
195.7

 
231.6

Income tax (benefit) provision
(2.9
)
 
58.7

 
61.4

 
41.5

Consolidated net income
164.6

 
130.3

 
134.3

 
190.1

Adjust for net (income) loss attributable to noncontrolling interest
(1.5
)
 
0.2

 
0.2

 
0.1

Net income attributable to Juniper Networks
$
163.1

 
$
130.5

 
$
134.5

 
$
190.2

Net income per share attributable to Juniper Networks common stockholders: (3)
 
 
 
 
 
 
 
Basic
$
0.31

 
$
0.25

 
$
0.26

 
$
0.36

Diluted
$
0.30

 
$
0.24

 
$
0.25

 
$
0.35


(1) Restructuring costs are typically comprised of employee severance costs, costs of consolidating duplicate facilities and contract termination costs. In the first quarter of 2010, the Company implemented a plan that resulted in reduction in workforce and facilities in certain business operations.
(2) Acquisition-related and other charges comprised of direct and indirect costs such as financial advisory, legal, due diligence, and integration costs from the four acquisitions completed in 2010.
(3) Net income per share attributable to Juniper Network stockholders is computed independently. Therefore, the sum of the quarterly net income per share may not equal the total computed for the fiscal year or any cumulative interim period.
Basis of Presentation (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2009
Dec. 31, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
 
 
Company's interest in the joint venture - NSN
 
60.00% 
Reclassified Sales and Marketing Expense
$ 25.1 
 
Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Y
Dec. 31, 2010
Dec. 31, 2009
Significant Accounting Policies [Line Items]
 
 
 
Maturity Period Of Non Designated Hedges Derivatives
one 
 
 
Maturities Of Cash Flow Hedge Derivatives
less than one year 
 
 
Computer, Equipment and Software, Useful Life, Minimum
1.5 
 
 
Computer, Equipment and Software, Useful Life, Maximum
5 
 
 
Furniture and Fixtures Useful Life
5 
 
 
Building and Building Improvement Useful Life, Minimum
7 
 
 
Building and Building Improvement Useful Life, Maximum
40 
 
 
Land Improvement Useful Life, Minimum
10 
 
 
Land Improvement Useful Life, Maximum
40 
 
 
Leasehold Improvement Depreciation Maximum Life
10 
 
 
Contractual Period
one to three years 
 
 
Contractual Support Period
one year or less 
 
 
Warranty Period Hardware (in years)
1 
 
 
Warranty Period Software (in days)
90 
 
 
Advertising Expense
$ 17.2 
$ 17.1 
$ 11.4 
Customer Concentration Risk [Member]
 
 
 
Significant Accounting Policies [Line Items]
 
 
 
Number of Customers Accounting for Ten Percent or More of Net Revenues
0 
 
 
Major Customers Revenues As Percentage Of Net Revenues
 
10.60% 
10.40% 
Net Income per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Numerator
 
 
 
 
 
 
 
 
 
 
 
Net income attributable to Juniper Networks
$ 96,200 
$ 83,700 
$ 115,500 
$ 129,700 
$ 190,200 
$ 134,500 
$ 130,500 
$ 163,100 
$ 425,136 
$ 618,402 
$ 116,999 
Denominator
 
 
 
 
 
 
 
 
 
 
 
Weighted-average shares used to compute basic net income per share
 
 
 
 
 
 
 
 
529,768,000 
522,444,000 
523,603,000 
Effect of dilutive securities:
 
 
 
 
 
 
 
 
 
 
 
Employee stock awards
 
 
 
 
 
 
 
 
11,600,000 
16,400,000 
10,400,000 
Weighted-average shares used to compute diluted net income per share
 
 
 
 
 
 
 
 
541,417,000 
538,790,000 
534,015,000 
Net income per share attributable to Juniper Networks common stockholders [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Basic
$ 0.18 1
$ 0.16 1
$ 0.22 1
$ 0.24 1
$ 0.36 1
$ 0.26 1
$ 0.25 1
$ 0.31 1
$ 0.80 
$ 1.18 
$ 0.22 
Diluted
$ 0.18 1
$ 0.16 1
$ 0.21 1
$ 0.24 1
$ 0.35 1
$ 0.25 1
$ 0.24 1
$ 0.30 1
$ 0.79 
$ 1.15 
$ 0.22 
Net Income per Share Textuals
 
 
 
 
 
 
 
 
 
 
 
Anti-dilutive shares excluded from computation of diluted earnings per share
 
 
 
 
 
 
 
 
17,400,000 
14,000,000 
38,900,000 
Cash, Cash Equivalents and Investments (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Cash and cash equivalents
$ 2,910,420 
$ 1,811,887 
$ 1,604,723 
$ 2,019,084 
Cash [Member]
 
 
 
 
Cash and cash equivalents
1,559,700 
686,300 
 
 
Demand Deposits [Member]
 
 
 
 
Cash and cash equivalents
633,700 
413,000 
 
 
Bank Time Deposits [Member]
 
 
 
 
Cash and cash equivalents
926,000 
273,300 
 
 
Cash Equivalents [Member]
 
 
 
 
Cash and cash equivalents
1,350,700 
1,125,600 
 
 
US Treasury Securities [Member]
 
 
 
 
Cash and cash equivalents
0 
76,700 
 
 
US Government-sponsored Enterprises Debt Securities [Member]
 
 
 
 
Cash and cash equivalents
24,500 
5,000 
 
 
Commercial Paper [Member]
 
 
 
 
Cash and cash equivalents
10,000 
4,000 
 
 
Money Market Funds [Member]
 
 
 
 
Cash and cash equivalents
$ 1,316,200 
$ 1,039,900 
 
 
Cash, Cash Equivalents and Investments - Available for Sale Securities (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Available-for-sale securities:
 
 
Available-for-sale securities, amortized cost
$ 1,372.1 
$ 999.0 
Available-for-sale securities, gross unrealized gains
1.4 
3.1 
Available-for-sale securities, gross unrealized losses
(0.8)
(0.5)
Available-for-sale securities, estimated fair value
1,372.7 
1,001.6 
Trading securities:
 
 
Trading securities, amortized cost
 
8.1 1
Trading securities, gross unrealized gains
 
0 1
Trading securities, gross unrealized losses
 
0 1
Trading securities, estimated fair value
 
8.1 1
Available-for-sale and Trading Investments [Abstract]
 
 
Total investments, amortized cost
1,381.4 
1,007.1 
Total investments, gross unrealized gains
1.4 
3.1 
Total investments, gross unrealized losses
(0.8)
(0.5)
Total investments, estimated fair value
1,382.0 
1,009.7 
Short-term investments [Member]
 
 
Available-for-sale and Trading Investments [Abstract]
 
 
Total investments, amortized cost
640.9 
473.6 
Total investments, gross unrealized gains
0.4 
0.9 
Total investments, gross unrealized losses
0 
0 
Total investments, estimated fair value
641.3 
474.5 
Long-term investments [Member]
 
 
Available-for-sale and Trading Investments [Abstract]
 
 
Total investments, amortized cost
740.5 
533.5 
Total investments, gross unrealized gains
1.0 
2.2 
Total investments, gross unrealized losses
(0.8)
(0.5)
Total investments, estimated fair value
740.7 
535.2 
Debt Securities [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities, amortized cost
1,372.1 
999.0 
Available-for-sale securities, gross unrealized gains
1.4 
3.1 
Available-for-sale securities, gross unrealized losses
(0.8)
(0.5)
Available-for-sale securities, estimated fair value
1,372.7 
1,001.6 
US Government Debt Securities [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities, amortized cost
301.1 
158.2 
Available-for-sale securities, gross unrealized gains
0 
0.2 
Available-for-sale securities, gross unrealized losses
(0.1)
0 
Available-for-sale securities, estimated fair value
301.0 
158.4 
US Government-sponsored Enterprises Debt Securities [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities, amortized cost
406.3 
213.8 
Available-for-sale securities, gross unrealized gains
0.3 
0.4 
Available-for-sale securities, gross unrealized losses
(0.1)
(0.2)
Available-for-sale securities, estimated fair value
406.5 
214.0 
Foreign Government Debt Securities [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities, amortized cost
0 
46.8 
Available-for-sale securities, gross unrealized gains
0 
0.2 
Available-for-sale securities, gross unrealized losses
0 
0 
Available-for-sale securities, estimated fair value
0 
47.0 
Certificates of Deposit [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities, amortized cost
31.8 
20.9 
Available-for-sale securities, gross unrealized gains
0 
0.1 
Available-for-sale securities, gross unrealized losses
0 
0 
Available-for-sale securities, estimated fair value
31.8 
21.0 
Commercial Paper [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities, amortized cost
 
9.5 
Available-for-sale securities, gross unrealized gains
 
0 
Available-for-sale securities, gross unrealized losses
 
0 
Available-for-sale securities, estimated fair value
 
9.5 
Asset-backed Securities [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities, amortized cost
124.7 
90.1 
Available-for-sale securities, gross unrealized gains
0.1 
0 
Available-for-sale securities, gross unrealized losses
(0.1)
(0.1)
Available-for-sale securities, estimated fair value
124.7 
90.0 
Corporate Debt Securities [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities, amortized cost
508.2 
459.7 
Available-for-sale securities, gross unrealized gains
1.0 
2.2 
Available-for-sale securities, gross unrealized losses
(0.5)
(0.2)
Available-for-sale securities, estimated fair value
508.7 
461.7 
Mutual Funds [Member]
 
 
Trading securities:
 
 
Trading securities, amortized cost
9.3 1
 
Trading securities, gross unrealized gains
0 1
 
Trading securities, gross unrealized losses
0 1
 
Trading securities, estimated fair value
$ 9.3 1
 
Cash, Cash Equivalents, and Investments - Maturities of Available for Sale Investments (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Available-for-sale and Trading Investments [Abstract]
 
 
Amortized cost due within one year
$ 631.6 
 
Gross unrealized gains due within one year
0.4 
 
Gross unrealized losses due within one year
0 
 
Estimated fair value due within one year
632.0 
 
Amortized cost due between one and five years
740.5 
 
Gross unrealized gains due between one and five years
1.0 
 
Gross unrealized losses due between one and five years
(0.8)
 
Estimated fair value due between one and five year
740.7 
 
Total investments, amortized cost
1,372.1 
999.0 
Total investments, gross unrealized gains
1.4 
 
Total investments, gross unrealized losses
0.8 
 
Available-for-sale securities, estimated fair value
1,372.7 
1,001.6 
Debt Securities [Member]
 
 
Available-for-sale and Trading Investments [Abstract]
 
 
Total investments, amortized cost
1,372.1 
999.0 
Available-for-sale securities, estimated fair value
1,372.7 
1,001.6 
US Government Debt Securities [Member]
 
 
Available-for-sale and Trading Investments [Abstract]
 
 
Total investments, amortized cost
301.1 
158.2 
Available-for-sale securities, estimated fair value
301.0 
158.4 
US Government-sponsored Enterprises Debt Securities [Member]
 
 
Available-for-sale and Trading Investments [Abstract]
 
 
Total investments, amortized cost
406.3 
213.8 
Available-for-sale securities, estimated fair value
406.5 
214.0 
Foreign Government Debt Securities [Member]
 
 
Available-for-sale and Trading Investments [Abstract]
 
 
Total investments, amortized cost
0 
46.8 
Available-for-sale securities, estimated fair value
0 
47.0 
Certificates of Deposit [Member]
 
 
Available-for-sale and Trading Investments [Abstract]
 
 
Total investments, amortized cost
31.8 
20.9 
Available-for-sale securities, estimated fair value
31.8 
21.0 
Commercial Paper [Member]
 
 
Available-for-sale and Trading Investments [Abstract]
 
 
Total investments, amortized cost
 
9.5 
Available-for-sale securities, estimated fair value
 
9.5 
Asset-backed Securities [Member]
 
 
Available-for-sale and Trading Investments [Abstract]
 
 
Total investments, amortized cost
124.7 
90.1 
Available-for-sale securities, estimated fair value
124.7 
90.0 
Corporate Debt Securities [Member]
 
 
Available-for-sale and Trading Investments [Abstract]
 
 
Total investments, amortized cost
508.2 
459.7 
Available-for-sale securities, estimated fair value
$ 508.7 
$ 461.7 
Cash, Cash Equivalents, and Investments - Unrealized Loss for Trading and Available for Sale Investments (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Schedule of Available-for-sale Securities [Line Items]
 
 
Fair value, less than 12 months
$ 599.4 
$ 221.8 
Unrealized loss, less than 12 months
(0.8)
(0.5)
Fair value, 12 months or greater
0.3 
35.0 
Unrealized loss, 12 months or greater
0 
0 
Total fair value, Available-for-sale investments in continuous unrealized loss position
599.7 
256.8 
Total unrealized loss, Available-for-sale investments in continuous unrealized loss position
(0.8)
(0.5)
Corporate Debt Securities [Member]
 
 
Schedule of Available-for-sale Securities [Line Items]
 
 
Fair value, less than 12 months
189.9 
104.3 1
Unrealized loss, less than 12 months
(0.5)
(0.2)1
Fair value, 12 months or greater
0 
28.8 1
Unrealized loss, 12 months or greater
0 
0 1
Total fair value, Available-for-sale investments in continuous unrealized loss position
189.9 
133.1 1
Total unrealized loss, Available-for-sale investments in continuous unrealized loss position
(0.5)
(0.2)1
US Government Debt Securities [Member]
 
 
Schedule of Available-for-sale Securities [Line Items]
 
 
Fair value, less than 12 months
186.7 
 
Unrealized loss, less than 12 months
(0.1)
 
Fair value, 12 months or greater
0 
 
Unrealized loss, 12 months or greater
0 
 
Total fair value, Available-for-sale investments in continuous unrealized loss position
186.7 
 
Total unrealized loss, Available-for-sale investments in continuous unrealized loss position
(0.1)
 
US Government-sponsored Enterprises Debt Securities [Member]
 
 
Schedule of Available-for-sale Securities [Line Items]
 
 
Fair value, less than 12 months
146.0 
57.8 
Unrealized loss, less than 12 months
(0.1)
(0.2)
Fair value, 12 months or greater
0 
0 
Unrealized loss, 12 months or greater
0 
0 
Total fair value, Available-for-sale investments in continuous unrealized loss position
146.0 
57.8 
Total unrealized loss, Available-for-sale investments in continuous unrealized loss position
(0.1)
(0.2)
Foreign Government Debt Securities [Member]
 
 
Schedule of Available-for-sale Securities [Line Items]
 
 
Fair value, less than 12 months
 
0 1
Unrealized loss, less than 12 months
 
0 1
Fair value, 12 months or greater
 
6.2 1
Unrealized loss, 12 months or greater
 
0 1
Total fair value, Available-for-sale investments in continuous unrealized loss position
 
6.2 1
Total unrealized loss, Available-for-sale investments in continuous unrealized loss position
 
0 1
Commercial Paper [Member]
 
 
Schedule of Available-for-sale Securities [Line Items]
 
 
Fair value, less than 12 months
 
5.0 1
Unrealized loss, less than 12 months
 
0 1
Fair value, 12 months or greater
 
0 1
Unrealized loss, 12 months or greater
 
0 1
Total fair value, Available-for-sale investments in continuous unrealized loss position
 
5.0 1
Total unrealized loss, Available-for-sale investments in continuous unrealized loss position
 
0 1
Asset-backed Securities [Member]
 
 
Schedule of Available-for-sale Securities [Line Items]
 
 
Fair value, less than 12 months
76.8 2
54.7 
Unrealized loss, less than 12 months
(0.1)2
(0.1)
Fair value, 12 months or greater
0.3 2
0 
Unrealized loss, 12 months or greater
0 2
0 
Total fair value, Available-for-sale investments in continuous unrealized loss position
77.1 2
54.7 
Total unrealized loss, Available-for-sale investments in continuous unrealized loss position
$ (0.1)2
$ (0.1)
Cash, Cash Equivalents, and Investments - Restricted Cash (Details) (USD $)
Dec. 31, 2011
Dec. 31, 2010
Restricted Cash and Investments [Abstract]
 
 
Restricted cash and investments
$ 78,307,000 
$ 119,346,000 
Restricted Cash [Member]
 
 
Restricted Cash and Investments [Abstract]
 
 
Restricted cash
600,000 
1,700,000 
Demand Deposits [Member]
 
 
Restricted Cash and Investments [Abstract]
 
 
Restricted cash
600,000 
1,700,000 
Restricted Investments [Member]
 
 
Restricted Cash and Investments [Abstract]
 
 
Restricted investments
77,700,000 
117,600,000 
US Government Debt Securities [Member]
 
 
Restricted Cash and Investments [Abstract]
 
 
Restricted investments
0 
600,000 
Corporate Debt Securities [Member]
 
 
Restricted Cash and Investments [Abstract]
 
 
Restricted investments
1,600,000 
2,700,000 
Mutual Funds [Member]
 
 
Restricted Cash and Investments [Abstract]
 
 
Restricted investments
1,000,000 
0 
Money Market Funds [Member]
 
 
Restricted Cash and Investments [Abstract]
 
 
Restricted investments
$ 75,100,000 
$ 114,300,000 
Cash, Cash Equivalents, and Investments - Textuals (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
month
investments
Dec. 31, 2010
investments
Dec. 31, 2009
Apr. 8, 2010
Jun. 30, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Jun. 30, 2010
Business Acquisition Acquired Entity Altor [Member]
Dec. 31, 2011
Cost Method Investee, Privately Held Companies
Dec. 31, 2010
Cost Method Investee, Privately Held Companies
Dec. 31, 2009
Cost Method Investee, Privately Held Companies
Dec. 31, 2010
Cost Method Investee, Privately Held Companies
Business Acquisition Acquired Entity Ankeena [Member]
Dec. 31, 2010
Cost Method Investee, Privately Held Companies
Business Acquisition Acquired Entity Altor [Member]
Dec. 31, 2011
Fair Value, Measurements, Nonrecurring [Member]
Cost Method Investee, Privately Held Companies
Dec. 31, 2010
Fair Value, Measurements, Nonrecurring [Member]
Cost Method Investee, Privately Held Companies
Dec. 31, 2011
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Inputs, Level 3 [Member]
Cost Method Investee, Privately Held Companies
Dec. 31, 2010
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Inputs, Level 3 [Member]
Cost Method Investee, Privately Held Companies
Dec. 31, 2009
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Inputs, Level 3 [Member]
Cost Method Investee, Privately Held Companies
Equity Method Investments
 
 
 
 
$ 2.0 
$ 2.0 
 
 
 
 
 
 
 
 
 
 
Proceeds from Sale and Maturity of Marketable Securities
1,926.6 
1,624.4 
683.8 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total investments In unrealized loss position
135 
73 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Decrease in Restricted Cash
42.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Increase in restricted cash
 
261.9 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Restricted Cash Distribution For Settlement Of Acquisition
 
196.5 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Business Acquisition, Cash Value of Unvested Restricted Shares
0.9 
 
 
10.7 
 
 
 
 
 
 
 
 
 
 
 
 
Vesting Period For Restricted Shares (in months)
9 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Business Acquisition, Payments for Restricted Shares That Have Vested
9.8 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Minority equity investment
 
 
 
 
 
 
51.8 
22.1 
 
 
 
0.4 
0.8 
 
 
 
Investment in privately-held companies
 
 
 
 
 
 
33.1 
13.3 
7.2 
 
 
 
 
 
 
 
Cost-method Investments, Realized Gains
 
 
 
 
 
 
 
 
 
3.2 
2.1 
 
 
 
 
 
Cost Method Investment, Other than Temporary Impairment
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 1.8 
$ 0 
$ 5.5 
Fair Value Measurements (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Fair Value Measurements (Textuals)
 
 
Amount of restricted investments measured at fair value included in the balance of Corporate Debt Securities
$ 1.6 
$ 2.7 
Amount of restricted investments measured at fair value included in the balance of Money Market Funds
75.1 
114.3 
Amount of Restricted Investments Measured at Fair Value Included in Balance of Mutual Funds
1.0 
 
Amount Of Restricted Investments Measured At Fair Value Included In Balance Of Government Securities
 
0.6 
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Prepaid expenses and other current assets measured at fair value
0 
0 
Accrued Liabilities, Fair Value Disclosure
0 
0 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
1,854.8 
1,441.7 
Trading securities:
 
 
Trading securities measured at fair value on a recurring basis
10.3 
8.1 
Derivative assets:
 
 
Derivative assets measured at fair value on a recurring basis
0 
0 
Total assets measured at fair value
1,865.1 
1,449.8 
Liabilities, Fair Value Disclosure
0 
0 
Derivative liability measured at fair value on a recurring basis
0 
0 
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Prepaid expenses and other current assets measured at fair value
9.6 
2.6 
Accrued Liabilities, Fair Value Disclosure
(9.6)
(2.6)
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
945.3 
803.1 
Trading securities:
 
 
Trading securities measured at fair value on a recurring basis
0 
0 
Derivative assets:
 
 
Derivative assets measured at fair value on a recurring basis
0.4 
0.4 
Total assets measured at fair value
945.7 
803.5 
Liabilities, Fair Value Disclosure
(9.6)
(2.6)
Derivative liability measured at fair value on a recurring basis
(9.6)
(2.6)
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Prepaid expenses and other current assets measured at fair value
0 
0 
Accrued Liabilities, Fair Value Disclosure
0 
0 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 
0 
Trading securities:
 
 
Trading securities measured at fair value on a recurring basis
0 
0 
Derivative assets:
 
 
Derivative assets measured at fair value on a recurring basis
0 
0 
Total assets measured at fair value
0 
0 
Liabilities, Fair Value Disclosure
0 
0 
Derivative liability measured at fair value on a recurring basis
0 
0 
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Prepaid expenses and other current assets measured at fair value
9.6 
2.6 
Accrued Liabilities, Fair Value Disclosure
(9.6)
(2.6)
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
2,800.1 
2,244.8 
Trading securities:
 
 
Trading securities measured at fair value on a recurring basis
10.3 
8.1 
Derivative assets:
 
 
Derivative assets measured at fair value on a recurring basis
0.4 
0.4 
Total assets measured at fair value
2,810.8 
2,253.3 
Liabilities, Fair Value Disclosure
(9.6)
(2.6)
Derivative liability measured at fair value on a recurring basis
(9.6)
(2.6)
Foreign Exchange Contract [Member] |
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Derivative assets:
 
 
Derivative assets measured at fair value on a recurring basis
0 
0 
Derivative liability measured at fair value on a recurring basis
0 
0 
Foreign Exchange Contract [Member] |
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Prepaid expenses and other current assets measured at fair value
9.6 
2.6 
Accrued Liabilities, Fair Value Disclosure
(9.6)
(2.6)
Derivative assets:
 
 
Derivative assets measured at fair value on a recurring basis
0.4 
0.4 
Derivative liability measured at fair value on a recurring basis
(9.6)
(2.6)
Foreign Exchange Contract [Member] |
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Prepaid expenses and other current assets measured at fair value
0 
 
Accrued Liabilities, Fair Value Disclosure
0 
 
Derivative assets:
 
 
Derivative assets measured at fair value on a recurring basis
0 
0 
Derivative liability measured at fair value on a recurring basis
0 
0 
Foreign Exchange Contract [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Prepaid expenses and other current assets measured at fair value
9.6 
2.6 
Accrued Liabilities, Fair Value Disclosure
(9.6)
(2.6)
Derivative assets:
 
 
Derivative assets measured at fair value on a recurring basis
0.4 
0.4 
Derivative liability measured at fair value on a recurring basis
(9.6)
(2.6)
Mutual Funds [Member] |
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Trading securities:
 
 
Trading securities measured at fair value on a recurring basis
10.3 1
8.1 
Mutual Funds [Member] |
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Trading securities:
 
 
Trading securities measured at fair value on a recurring basis
0 1
0 
Mutual Funds [Member] |
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Trading securities:
 
 
Trading securities measured at fair value on a recurring basis
0 1
0 
Mutual Funds [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Trading securities:
 
 
Trading securities measured at fair value on a recurring basis
10.3 1
8.1 
Debt Securities [Member] |
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
1,854.8 
1,441.7 
Debt Securities [Member] |
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
945.3 
803.1 
Debt Securities [Member] |
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 
0 
Debt Securities [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
2,800.1 
2,244.8 
US Government Debt Securities [Member] |
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
149.3 
54.9 2
US Government Debt Securities [Member] |
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
151.7 
180.8 2
US Government Debt Securities [Member] |
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 
0 2
US Government Debt Securities [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
301.0 
235.7 2
US Government-sponsored Enterprises Debt Securities [Member] |
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
314.2 
208.9 
US Government-sponsored Enterprises Debt Securities [Member] |
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
116.8 
10.1 
US Government-sponsored Enterprises Debt Securities [Member] |
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 
0 
US Government-sponsored Enterprises Debt Securities [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
431.0 
219.0 
Foreign Government Debt Securities [Member] |
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
 
21.0 
Foreign Government Debt Securities [Member] |
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
 
26.0 
Foreign Government Debt Securities [Member] |
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
 
0 
Foreign Government Debt Securities [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
 
47.0 
Commercial Paper [Member] |
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 
0 
Commercial Paper [Member] |
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
10.0 
13.5 
Commercial Paper [Member] |
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 
0 
Commercial Paper [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
10.0 
13.5 
Corporate Debt Securities [Member] |
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 3
2.7 4
Corporate Debt Securities [Member] |
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
510.3 3
461.7 4
Corporate Debt Securities [Member] |
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 3
0 4
Corporate Debt Securities [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
510.3 3
464.4 4
Certificates of Deposit [Member] |
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 
0 
Certificates of Deposit [Member] |
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
31.8 
21.0 
Certificates of Deposit [Member] |
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 
0 
Certificates of Deposit [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
31.8 
21.0 
Asset-backed Securities [Member] |
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 
0 
Asset-backed Securities [Member] |
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
124.7 
90.0 
Asset-backed Securities [Member] |
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 
0 
Asset-backed Securities [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
124.7 
90.0 
Money Market Funds [Member] |
Fair Value, Inputs, Level 1 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
1,391.3 5
1,154.2 6
Money Market Funds [Member] |
Fair Value, Inputs, Level 2 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 5
0 6
Money Market Funds [Member] |
Fair Value, Inputs, Level 3 [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
0 5
0 6
Money Market Funds [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member] |
Fair Value, Measurements, Recurring [Member]
 
 
Available-for-sale securities:
 
 
Available-for-sale securities measured at fair value on a recurring basis
$ 1,391.3 5
$ 1,154.2 6
Fair Value Measurements, Assets by Balance Sheet Grouping (Details) (Fair Value, Measurements, Recurring [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Fair Value, Inputs, Level 1 [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Cash equivalents measured at fair value
$ 1,316.2 
$ 1,039.9 
Short-term investments measured at fair value
168.9 
150.7 
Long-term investments measured at fair value
303.9 
142.2 
Restricted cash and investments measured at fair value
76.1 
117.0 
Prepaid expenses and other current assets measured at fair value
0 
0 
Total assets measured at fair value
1,865.1 
1,449.8 
Accrued Liabilities, Fair Value Disclosure
0 
0 
Derivative liability measured at fair value on a recurring basis
0 
0 
Fair Value, Inputs, Level 2 [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Cash equivalents measured at fair value
34.5 
85.7 
Short-term investments measured at fair value
472.4 
323.8 
Long-term investments measured at fair value
436.8 
393.0 
Restricted cash and investments measured at fair value
1.6 
0.6 
Prepaid expenses and other current assets measured at fair value
0.4 
0.4 
Total assets measured at fair value
945.7 
803.5 
Accrued Liabilities, Fair Value Disclosure
(9.6)
(2.6)
Derivative liability measured at fair value on a recurring basis
(9.6)
(2.6)
Fair Value, Inputs, Level 3 [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Cash equivalents measured at fair value
0 
0 
Short-term investments measured at fair value
0 
0 
Long-term investments measured at fair value
0 
0 
Restricted cash and investments measured at fair value
0 
0 
Prepaid expenses and other current assets measured at fair value
0 
0 
Total assets measured at fair value
0 
0 
Accrued Liabilities, Fair Value Disclosure
0 
0 
Derivative liability measured at fair value on a recurring basis
0 
0 
Estimate of Fair Value, Fair Value Disclosure [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Cash equivalents measured at fair value
1,350.7 
1,125.6 
Short-term investments measured at fair value
641.3 
474.5 
Long-term investments measured at fair value
740.7 
535.2 
Restricted cash and investments measured at fair value
77.7 
117.6 
Prepaid expenses and other current assets measured at fair value
0.4 
0.4 
Total assets measured at fair value
2,810.8 
2,253.3 
Accrued Liabilities, Fair Value Disclosure
(9.6)
(2.6)
Derivative liability measured at fair value on a recurring basis
(9.6)
(2.6)
Foreign Exchange Contract [Member] |
Fair Value, Inputs, Level 1 [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Derivative liability measured at fair value on a recurring basis
0 
0 
Foreign Exchange Contract [Member] |
Fair Value, Inputs, Level 2 [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Accrued Liabilities, Fair Value Disclosure
(9.6)
(2.6)
Derivative liability measured at fair value on a recurring basis
(9.6)
(2.6)
Foreign Exchange Contract [Member] |
Fair Value, Inputs, Level 3 [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Accrued Liabilities, Fair Value Disclosure
0 
 
Derivative liability measured at fair value on a recurring basis
0 
0 
Foreign Exchange Contract [Member] |
Estimate of Fair Value, Fair Value Disclosure [Member]
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
Accrued Liabilities, Fair Value Disclosure
(9.6)
(2.6)
Derivative liability measured at fair value on a recurring basis
$ (9.6)
$ (2.6)
Fair Value Measurements, Liabilities Measured On A Recurring Basis (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Transfers between levels of fair value [Abstract]
 
 
Fair Value, Level 1 to level 2 Transfers, Amount
$ 0 
$ 0 
Fair Value, Level 2 to level 1 Transfers, Amount
$ 0 
$ 0 
Fair Value Measurements, Assets and Liabilities Measured On A Nonrecurring Basis (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
 
Fair Value Liabilities Measured On Nonrecurring Basis Liabilities
$ 0 
$ 0 
 
Cost Method Investee, Privately Held Companies |
Fair Value, Inputs, Level 3 [Member]
 
 
 
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
 
 
 
Loss due to impairment of privately held equity investments measured on a non-recurring basis
$ 1.8 
$ 0 
$ 5.5 
Derivative Instruments (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Notional Amount of Derivatives, Total [Abstract]
 
 
Cash flow hedges
$ 184.3 
$ 110.4 
Non-designated hedges
122.7 
74.4 
Total
$ 307.0 
$ 184.8 
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
 
 
Maximum Length of Time Hedged in Cash Flow Hedge
one year or less 
 
Reclassification Time Of Other Comprehensive Income Loss Into Income
within the next 12 months 
 
Maturity Period Of Non Designated Hedges Derivatives
one 
 
Derivative Instruments, Balance Sheet Location (Details) (Foreign Exchange Contract [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Other Current Assets [Member]
 
 
Derivatives, Fair Value [Line Items]
 
 
Derivative Asset Designated as Hedging Instrument, Fair Value
$ 0.4 
$ 0.4 
Other Current Liabilities [Member]
 
 
Derivatives, Fair Value [Line Items]
 
 
Derivative Liability Designated as Hedging Instrument, Fair Value
$ 9.6 
$ 2.6 
Derivative Instruments, Gain (Loss) (Details) (Foreign Exchange Contract [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash Flow Hedging [Member]
 
 
 
Derivative Instruments, Gain (Loss) [Line Items]
 
 
 
Gain recognized in accumulated other comprehensive income, effective portion
 
 
$ 0.6 
Loss recognized in accumulated other comprehensive income, effective portion
(7.9)
(3.0)
 
Operating Expense [Member] |
Cash Flow Hedging [Member]
 
 
 
Derivative Instruments, Gain (Loss) [Line Items]
 
 
 
Gain reclassified from accumulated other comprehensive income into Statements of Operations, effective portion
0.7 
 
4.2 
Loss reclassified from accumulated other comprehensive income into Statements of Operations, effective portion
 
(2.1)
 
Interest And Other Income, Net [Member] |
Nondesignated [Member]
 
 
 
Derivative Instruments, Gain (Loss) [Line Items]
 
 
 
Derivative instruments not designated as hedging instruments, gain
1.5 
 
4.9 
Derivative instruments not designated as hedging instruments, loss
 
$ (0.3)
 
Business Combination, Purchase Price Allocation (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Business Acquisitions 2011 [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Business Acquisition [Line Items]
 
 
Net tangible assets acquired
$ 1.7 
$ 8.8 
Intangible assets acquired
28.4 
116.5 
Goodwill
0.4 
269.2 
Total purchase consideration
$ 30.5 
$ 394.5 
Business Combination Business Combination, Purchase Consideration (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2010
Jun. 30, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Sep. 30, 2010
Business Acquisition Acquired Entity SMobile [Member]
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisition [Line Items]
 
 
 
 
 
Business Acquisition, Cost of Acquired Entity, Cash Paid
$ 392.1 
$ 66.5 
$ 69.5 
$ 104.0 
$ 152.1 
Business Acquisition, Cost of Acquired Entity, Equity Interests Issued and Issuable
2.4 1
2.4 1
0 
0 
0 
Business Acquisition, Cost of Acquired Entity, Purchase Price
$ 394.5 
$ 68.9 
$ 69.5 
$ 104.0 
$ 152.1 
Business Combination, Intangible Assets Acquired (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Support Agreements and Related Relationships [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Existing Technology [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Core Technology [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Customer Contracts And Related Relationships [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Noncompete Agreements [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
OEM Customer Contracts [Member]
Dec. 31, 2011
Business Acquisitions 2011 [Member]
Dec. 31, 2011
Business Acquisitions 2011 [Member]
Existing or Core Technology [Member]
Y
Dec. 31, 2011
Business Acquisitions 2011 [Member]
Support Agreements and Related Relationships [Member]
Y
Dec. 31, 2011
Business Acquisitions 2011 [Member]
Patents [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Support Agreements and Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Existing Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Core Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Customer Contracts And Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
Noncompete Agreements [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Business Acquisitions 2010 [Member]
OEM Customer Contracts [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Support Agreements and Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Existing Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Core Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Customer Contracts And Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
Noncompete Agreements [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity SMobile [Member]
Business Acquisitions 2010 [Member]
OEM Customer Contracts [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Support Agreements and Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Existing Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Core Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Customer Contracts And Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
Noncompete Agreements [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Business Acquisitions 2010 [Member]
OEM Customer Contracts [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Support Agreements and Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Existing Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Core Technology [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Customer Contracts And Related Relationships [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
Noncompete Agreements [Member]
Y
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisitions 2010 [Member]
OEM Customer Contracts [Member]
Y
Business Acquisition [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Acquired finite-lived intangible asset, estimated useful life (in years)
 
 
 
 
 
 
 
 
10 
4 
5 
 
0.0 
4.0 
4.0 
0.0 
0.0 
0.0 
 
6.0 
5.0 
0.0 
6.0 
2.0 
0.0 
 
0.0 
6.0 
6.0 
0.0 
0.0 
0.0 
 
7.0 
5.0 
0.0 
7.0 
0.0 
2.0 
Acquired Finite-lived Intangible Asset, Amount
$ 116.5 
$ 2.7 
$ 92.2 
$ 7.8 
$ 10.7 
$ 0.1 
$ 0.2 
$ 28.4 
$ 21.9 
$ 5.1 
$ 1.4 
$ 12.2 
$ 0 
$ 9.0 
$ 3.2 
$ 0 
$ 0 
$ 0 
$ 26.6 
$ 0.1 
$ 24.3 
$ 0 
$ 2.1 
$ 0.1 
$ 0 
$ 21.3 
$ 0 
$ 13.9 
$ 4.6 
$ 0 
$ 0 
$ 0 
$ 56.4 
$ 2.6 
$ 45.0 
$ 0 
$ 8.6 
$ 0 
$ 0.2 
Acquired Indefinite-lived Intangible Asset, Amount
$ 2.8 
 
 
 
 
 
 
 
 
 
 
$ 0 
 
 
 
 
 
 
$ 0 
 
 
 
 
 
 
$ 2.8 
 
 
 
 
 
 
$ 0 
 
 
 
 
 
 
Acquired Infinite Lived Intangible Asset Weighted Average Useful Life
 
 
 
 
 
 
 
 
 
 
 
0.0 
 
 
 
 
 
 
0.0 
 
 
 
 
 
 
0.0 
 
 
 
 
 
 
0.0 
 
 
 
 
 
 
Business Combination, Textuals (Details) (USD $)
12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2011
Business Acquisitions 2011 [Member]
Dec. 31, 2011
Business Acquisitions 2010 [Member]
Dec. 31, 2010
Business Acquisitions 2010 [Member]
Mar. 31, 2011
Business Acquisition Acquired Entity OpNext [Member]
Mar. 31, 2011
Business Acquisition Acquired Entity Brilliant [Member]
Dec. 31, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Jun. 30, 2010
Business Acquisition Acquired Entity Ankeena [Member]
Sep. 30, 2010
Business Acquisition Acquired Entity SMobile [Member]
Dec. 31, 2010
Business Acquisition Acquired Entity Altor [Member]
Jun. 30, 2010
Business Acquisition Acquired Entity Altor [Member]
Dec. 31, 2010
Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisition [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Business Acquisition, Percentage of Voting Interests Acquired
 
 
 
 
 
 
 
 
 
100.00% 
100.00% 
100.00% 
 
100.00% 
Business Acquisition, Cost of Acquired Entity, Purchase Price
 
$ 394,500,000 
 
 
 
 
$ 26,000,000 
$ 4,500,000 
 
$ 68,900,000 
$ 69,500,000 
$ 104,000,000 
 
$ 152,100,000 
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net
 
 
 
 
 
 
25,700,000 
4,400,000 
 
3,600,000 
(5,200,000)
4,500,000 
 
5,900,000 
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents
 
 
 
 
 
 
 
 
 
2,300,000 
400,000 
6,400,000 
 
800,000 
Business Acquisition, Purchase Price Allocation, Goodwill Amount
 
 
 
400,000 
 
269,200,000 
300,000 
100,000 
 
53,100,000 
48,100,000 
78,200,000 
 
89,800,000 
Equity Method Investments
 
 
 
 
 
 
 
 
 
2,000,000 
 
 
2,000,000 
 
Percentage Ownership Interest In Equity Investment Prior To Acquisition
 
 
 
 
 
 
 
 
0.077 
 
 
0.050 
 
 
Equity Interest in Acquiree Prior to Acquisition, Fair Value
 
 
 
 
 
 
 
 
 
5,200,000 
 
 
 
 
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value
 
 
 
 
 
 
 
 
 
 
 
4,100,000 
 
 
Pro Forma results of operations not presented, impact to results of operations not material
0 
 
 
 
 
 
 
 
 
 
 
 
 
 
Goodwill deductible for income tax purposes
 
 
 
0 
88,900,000 
 
 
 
 
 
 
 
 
 
Acquisition-related costs within operating expenses and cost of revenues
9,600,000 
6,300,000 
0 
 
 
 
 
 
 
 
 
 
 
 
Gain (Loss) on Investments
$ (326,000)
$ 8,653,000 
$ (5,562,000)
 
 
 
 
 
 
 
 
 
 
 
Goodwill and Purchased Intangible Assets (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Goodwill [Roll Forward]
 
 
 
Goodwill, beginning of period
$ 3,927,807,000 
$ 3,658,602,000 
 
Goodwill, Translation and Purchase Accounting Adjustments
(100,000)
200,000 
 
Goodwill acquired
400,000 
269,000,000 
 
Goodwill, end of period
3,928,144,000 
3,927,807,000 
3,658,602,000 
Goodwill, Impairment Loss
0 
0 
0 
Infrastructure Segment [Member]
 
 
 
Goodwill [Roll Forward]
 
 
 
Goodwill, beginning of period
1,643,400,000 
1,500,500,000 
 
Goodwill, Translation and Purchase Accounting Adjustments
1,700,000 
0 
 
Goodwill acquired
400,000 
142,900,000 
 
Goodwill, end of period
1,645,500,000 
1,643,400,000 
 
Service Layer Technologies Segment [Member]
 
 
 
Goodwill [Roll Forward]
 
 
 
Goodwill, beginning of period
2,284,400,000 
2,158,100,000 
 
Goodwill, Translation and Purchase Accounting Adjustments
(1,800,000)
200,000 
 
Goodwill acquired
0 
126,100,000 
 
Goodwill, Impaired, Accumulated Impairment Loss, End of Period
(1,280,000,000)
 
 
Goodwill, end of period
$ 2,282,600,000 
$ 2,284,400,000 
 
Goodwill and Purchased Intangible Assets, Finite Lived Intangible Assets by Class (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Purchased Intangible Assets [Line Items]
 
 
 
Finite-lived intangible assets, gross
$ 591,000,000 
$ 557,500,000 
 
Finite-lived intangible assets, accumulated amortization
(470,700,000)
(443,600,000)
 
Finite-lived intangible assets, net
120,300,000 
113,900,000 
 
Indefinite-lived Intangible Assets
2,800,000 
7,900,000 
 
Indefinite-Lived Intangible Assets (Excluding Goodwill)
2,800,000 
7,900,000 
 
Intangible Assets Gross Excluding Goodwill
593,800,000 
565,400,000 
 
Purchased Intangible Assets, Accumulated Amortization
(470,700,000)
(443,600,000)
 
Purchased intangible assets, net
123,114,000 
121,803,000 
 
Total Finite and Indefinite-lived Intangible Assets, Acquired During the Period
28,400,000 
116,500,000 
 
Amortization of purchased intangible assets
27,100,000 1
8,600,000 1
15,400,000 1
Impairment of finite-lived intangible assets
0 
0 
0 
In Process Research And Development [Member]
 
 
 
Purchased Intangible Assets [Line Items]
 
 
 
Finite-lived intangible assets, accumulated amortization
   
   
 
Technologies and Patents [Member]
 
 
 
Purchased Intangible Assets [Line Items]
 
 
 
Finite-lived intangible assets, gross
499,500,000 
471,100,000 
 
Finite-lived intangible assets, accumulated amortization
(404,200,000)
(381,400,000)
 
Finite-lived intangible assets, net
95,300,000 
89,700,000 
 
Other Intangible Assets [Member]
 
 
 
Purchased Intangible Assets [Line Items]
 
 
 
Finite-lived intangible assets, gross
91,500,000 
86,400,000 
 
Finite-lived intangible assets, accumulated amortization
(66,500,000)
(62,200,000)
 
Finite-lived intangible assets, net
$ 25,000,000 
$ 24,200,000 
 
Goodwill and Purchased Intangible Assets, Estimated Future Amortization Expense Intangible Assets (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
 
2012
$ 27.4 
2013
27.2 
2014
25.3 
2015
20.4 
2016
7.7 
Thereafter
12.3 
Total
$ 120.3 
Other Financial Information, Inventories (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Other Financial Information [Abstract]
 
 
Inventory, Raw Materials
$ 52.4 
$ 5.8 
Inventory, Finished Goods
16.7 
15.8 
Inventory, Net
$ 69.1 
$ 21.6 
Other Financial Information, Property, Plants and Equipments (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Property, Plant and Equipment [Line Items]
 
 
 
Property, Plant and Equipment, Gross
$ 1,260,400,000 
$ 1,065,400,000 
 
Construction in Progress, Gross
99,700,000 
41,900,000 
 
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
(661,800,000)
(571,500,000)
 
Property, Plant and Equipment, Net
598,581,000 
493,881,000 
 
Depreciation
142,160,000 
146,757,000 
132,946,000 
Asset Impairment Charges
13,462,000 
0 
0 
Computer Equipment [Member]
 
 
 
Property, Plant and Equipment [Line Items]
 
 
 
Property, Plant and Equipment, Gross
604,600,000 
514,300,000 
 
Software [Member]
 
 
 
Property, Plant and Equipment [Line Items]
 
 
 
Property, Plant and Equipment, Gross
110,200,000 
101,600,000 
 
Leasehold Improvements [Member]
 
 
 
Property, Plant and Equipment [Line Items]
 
 
 
Property, Plant and Equipment, Gross
204,100,000 
179,000,000 
 
Furniture and Fixtures [Member]
 
 
 
Property, Plant and Equipment [Line Items]
 
 
 
Property, Plant and Equipment, Gross
27,400,000 
24,900,000 
 
Building and Building Improvements [Member]
 
 
 
Property, Plant and Equipment [Line Items]
 
 
 
Property, Plant and Equipment, Gross
6,200,000 
0 
 
Land and Land Improvements [Member]
 
 
 
Property, Plant and Equipment [Line Items]
 
 
 
Property, Plant and Equipment, Gross
$ 208,200,000 
$ 203,700,000 
 
Other Financial Information, Deferred Revenue (Details) (USD $)
Dec. 31, 2011
Dec. 31, 2010
Deferred Product Revenue [Abstract]
 
 
Deferred revenue, net
$ 967,000,000 
$ 884,400,000 
Deferred Revenue Reported as [Abstract]
 
 
Deferred Revenue, Current
712,663,000 
660,264,000 
Deferred Revenue, Noncurrent
254,364,000 
224,165,000 
Sales Revenue, Goods, Net [Member]
 
 
Deferred Product Revenue [Abstract]
 
 
Undelivered product commitments and other product deferrals
288,100,000 
294,100,000 
Distributor inventory and other sell-through items
134,000,000 
143,400,000 
Deferred gross product revenue
422,100,000 
437,500,000 
Deferred cost of product revenue
(136,900,000)
(148,800,000)
Deferred revenue, net
285,200,000 
288,700,000 
Sales Revenue, Services, Net [Member]
 
 
Deferred Product Revenue [Abstract]
 
 
Deferred revenue, net
$ 681,800,000 
$ 595,700,000 
Other Financial Information, Warranties (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Movement in Standard Product Warranty Accrual [Roll Forward]
 
 
Beginning balance
$ 35.9 
$ 38.2 
Provisions made during the period, net
52.5 
49.9 
Change in estimate
(12.6)
(3.0)
Actual costs incurred during the period
(47.5)
(49.2)
Ending balance
$ 28.3 
$ 35.9 
Other Financial Information, Restructuring (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Restructuring Reserve [Roll Forward]
 
 
 
Beginning Balance
$ 7.9 
$ 9.4 
 
Charges
17.1 
10.8 
19.5 
Cash payments
(18.6)
(8.0)
 
Non-cash settlements and other adjustments
(2.3)
(4.3)
 
Ending Balance
4.1 
7.9 
9.4 
Facilities [Member]
 
 
 
Restructuring Reserve [Roll Forward]
 
 
 
Beginning Balance
7.7 
4.9 
 
Charges
0.2 
6.9 
 
Cash payments
(5.3)
(2.5)
 
Non-cash settlements and other adjustments
(1.6)
(1.6)
 
Ending Balance
1.0 
7.7 
 
Severance [Member]
 
 
 
Restructuring Reserve [Roll Forward]
 
 
 
Beginning Balance
0.2 
4.5 
 
Charges
16.9 
3.9 
 
Cash payments
(13.3)
(5.5)
 
Non-cash settlements and other adjustments
(0.7)
(2.7)
 
Ending Balance
$ 3.1 
$ 0.2 
 
Other Financial Information, Interest and Other Income Net (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Component of Other Income, Nonoperating [Line Items]
 
 
 
 
 
 
 
 
 
 
 
Interest income
 
 
 
 
 
 
 
 
$ 9,700,000 
$ 10,500,000 
$ 11,800,000 
Interest Expense
 
 
 
 
 
 
 
 
(49,500,000)
(8,700,000)
(6,000,000)
Other
 
 
 
 
 
 
 
 
(7,000,000)
8,800,000 
(4,600,000)
Other income (expense), net
(10,700,000)
(15,900,000)
(13,700,000)
(6,500,000)
4,800,000 
200,000 
4,000,000 
1,400,000 
(46,808,000)
10,570,000 
1,366,000 
Interest Expense On Long Term Debt
 
 
 
 
 
 
 
 
(37,700,000)
 
 
Legal Fees
 
 
 
 
 
 
 
 
 
7,000,000 
 
Gain (Loss) on Investments
 
 
 
 
 
 
 
 
$ (326,000)
$ 8,653,000 
$ (5,562,000)
Financing (Details) (USD $)
12 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended
Dec. 31, 2011
day
Dec. 31, 2010
Dec. 31, 2009
Mar. 31, 2011
Fixed Rate Note Due 2016 [Member]
Dec. 31, 2011
Fixed Rate Note Due 2016 [Member]
Mar. 31, 2011
Fixed Rate Note Due 2021 [Member]
Dec. 31, 2011
Fixed Rate Note Due 2021 [Member]
Mar. 31, 2011
Fixed Rate Note Due 2041 [Member]
Dec. 31, 2011
Fixed Rate Note Due 2041 [Member]
Long-Term Debt [Line Items]
 
 
 
 
 
 
 
 
 
Long-term Debt, Gross
$ 1,000,000,000 
 
 
 
$ 300,000,000 
 
$ 300,000,000 
 
$ 400,000,000 
Unaccreted Discount
(1,000,000)
 
 
 
 
 
 
 
 
Long-term debt
999,034,000 
0 
 
 
 
 
 
 
 
Debt Instrument, Interest Rate, Effective Percentage
 
 
 
 
3.12% 
 
4.63% 
 
6.01% 
Debt Instrument, Face Amount
 
 
 
300,000,000 
 
300,000,000 
 
400,000,000 
 
Debt Instrument, Interest Rate, Stated Percentage
 
 
 
3.10% 
 
4.60% 
 
5.95% 
 
Debt Instrument, Maturity Date
 
 
 
Mar. 15, 2016 
 
Mar. 15, 2021 
 
Mar. 15, 2041 
 
Change of Control Repurchase Price Percentage of Principal
101.00% 
 
 
 
 
 
 
 
 
Debt Instrument, Fair Value
1,069,800,000 
0 
 
 
 
 
 
 
 
Other Financing Arrangements [Abstract]
 
 
 
 
 
 
 
 
 
Number of days due from receivable
30 
 
 
 
 
 
 
 
 
Sale of receivables
738,200,000 
637,500,000 
449,800,000 
 
 
 
 
 
 
Proceeds from sale and collection of receivables
686,500,000 
595,700,000 
426,300,000 
 
 
 
 
 
 
Receivables from sale of receivables
162,900,000 
127,400,000 
 
 
 
 
 
 
 
Cash received from financing provider that has not been recognized as revenue
$ 33,300,000 
$ 49,100,000 
 
 
 
 
 
 
 
Equity, Stock Repurchase Activities (Details) (USD $)
12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Feb. 28, 2010
Stock Repurchase Program 2010 [Member]
Dec. 31, 2011
Stock Repurchase Program 2010 [Member]
Mar. 31, 2008
Stock Repurchase Program 2008 [Member]
Dec. 31, 2011
Stock Repurchase Program 2008 [Member]
Common stock authorized for repurchase under the 2010 and 2008 Stock Repurchase Programs
 
 
$ 1,000,000,000 
 
$ 1,000,000,000 
 
Stock Repurchased and Retired During Period, Shares
17,500,000 
19,700,000 
 
 
 
 
Common Stock Repurchased Under Stock Repurchase Program Average Purchase Price
$ 30.93 
$ 28.67 
 
 
 
 
Common stock repurchased and retired under stock repurchase programs, value
541,200,000 
563,500,000 
 
 
 
 
Stock Repurchase Program, Remaining Authorized Repurchase Amount
 
 
 
213,800,000 
 
0 
Repurchase of Common Stock from Employees for Net Issuance of Shares
200,000 
100,000 
 
 
 
 
Common Stock Average Purchase Price
$ 35.98 
$ 25.75 
 
 
 
 
Shares Repuchased And Retired Related To Net Issuances
$ 7,400,000 
$ 1,900,000 
 
 
 
 
Equity, Comprehensive Income (Loss) (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Consolidated net income
$ 96,200,000 
$ 83,700,000 
$ 115,500,000 
$ 129,600,000 
$ 190,100,000 
$ 134,300,000 
$ 130,300,000 
$ 164,600,000 
$ 425,012,000 
$ 619,373,000 
$ 115,228,000 
Other Comprehensive Income (Loss), Net of Tax:
 
 
 
 
 
 
 
 
 
 
 
Change in net unrealized (loss) gain on investments, net
 
 
 
 
 
 
 
 
(9,900,000)
(300,000)
(2,800,000)
Change in foreign currency translation adjustment, net
 
 
 
 
 
 
 
 
(6,400,000)
500,000 
5,600,000 
Total other comprehensive income (loss), net
 
 
 
 
 
 
 
 
(16,300,000)
200,000 
2,800,000 
Consolidated comprehensive income
 
 
 
 
 
 
 
 
408,700,000 
619,600,000 
118,000,000 
Adjust for comprehensive loss (income) attributable to noncontrolling interest
 
 
 
 
 
 
 
 
100,000 
(1,000,000)
1,800,000 
Comprehensive income attributable to Juniper Networks
 
 
 
 
 
 
 
 
$ 408,800,000 
$ 618,600,000 
$ 119,800,000 
Employee Benefit Plans (Details) (USD $)
12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
Y
Dec. 31, 2010
Y
Dec. 31, 2009
Y
Dec. 31, 2011
Employee Stock Purchase Plan 2008 [Member]
Jun. 30, 2011
Equity Incentive Plan 2006 [Member]
Jun. 30, 2010
Equity Incentive Plan 2006 [Member]
Dec. 31, 2011
Equity Incentive Plan 2006 [Member]
Dec. 31, 2010
Equity Incentive Plan 2006 [Member]
Dec. 31, 2011
Stock Options [Member]
Y
Dec. 31, 2011
Employee Stock Purchase Plan [Member]
Y
month
Share-Based Compensation Plans
 
 
 
 
 
 
 
 
 
 
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price
 
 
 
15.00% 
 
 
 
 
 
 
Periodic Payroll Deduction - Percentage of Base Salary
 
 
 
10.00% 
 
 
 
 
 
 
Maximum Purchase of Common Stock, Shares
 
 
 
6,000 
 
 
 
 
 
 
ESPP purchase period, share limitation (in months)
 
 
 
 
 
 
 
 
 
12 
Maximum Purchase of Common Stock, Value
 
 
 
$ 25,000 
 
 
 
 
 
 
ESPP purchase period, value limitation (in calendar years)
 
 
 
 
 
 
 
 
 
1 
Number of Shares in Authorized
 
 
 
 
 
 
64,500,000 
 
 
 
Maximum Additional Shares Expire Unexercised, Under 1996 and 2000 Plan
75,000,000 
 
 
 
 
 
 
 
 
 
Additional Authorized Share Reserve Approved By Shareholders
 
 
 
 
30,000,000 
30,000,000 
30,000,000 
 
 
 
Number of Shares Outstanding
 
 
 
 
 
 
58,200,000 
 
 
 
Number of Shares Available for Future Issuance
 
 
 
12,000,000 
 
 
41,100,000 
30,700,000 
 
 
Outstanding Stock Options and RSU's Covering Shares of Common Stock
1,400,000 
 
 
 
 
 
 
 
 
 
Share-based compensation stock option contractual life from grant date since 2006, in years
 
 
 
 
 
 
 
 
7 
 
Share-based compensation stock option contractual life from grant date, prior to 2006, in years
 
 
 
 
 
 
 
 
 
10 
Stock Option Activities Rollforward
 
 
 
 
 
 
 
 
 
 
Beginning Balance, Number of Shares
49,400,000 
67,400,000 
73,600,000 
 
 
 
 
 
 
 
Beginning Balance, Weighted Average Exercise Price
$ 21.90 
$ 20.84 
$ 21.24 
 
 
 
 
 
 
 
Options Granted, Number of Shares
5,600,000 
6,200,000 
9,900,000 
 
 
 
5,600,000 
 
 
 
Options Granted, Weighted Average Exercise Price
$ 37.17 
$ 29.15 
$ 17.86 
 
 
 
 
 
 
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Other Increases (Decreases) in Period
 
500,000 1
 
 
 
 
 
 
 
 
Share Based Compensation Arrangement By Share Based Payment Awards Options Assumed In Period Weighted Average Exercise Price
 
$ 31.65 1
 
 
 
 
 
 
 
 
Options Canceled, Number of Shares
(1,900,000)
(2,300,000)
(2,300,000)
 
 
 
(1,900,000)2
 
 
 
Options Canceled, Weighted Average Exercise Price
$ 26.76 
$ 22.03 
$ 21.57 
 
 
 
 
 
 
 
Options Exercised, Number of Shares
(13,900,000)
(21,600,000)
(8,600,000)
 
 
 
 
 
 
 
Options Exercised, Weighted Average Exercise Price
$ 21.13 
$ 18.99 
$ 14.59 
 
 
 
 
 
 
 
Options Expired, Number of Shares
(600,000)
(800,000)
5,200,000 
 
 
 
(600,000)2
 
 
 
Options Expired, Weighted Average Exercise Price
$ 34.32 
$ 61.48 
$ 34.91 
 
 
 
 
 
 
 
Ending Balance, Number of Shares
38,600,000 
49,400,000 
67,400,000 
 
 
 
 
 
 
 
Ending Balance, Weighted Average Exercise Price
$ 23.98 
$ 21.90 
$ 20.84 
 
 
 
 
 
 
 
Weighted Average Remaining Contractual Term at Period End
3.7 
4.1 
4.6 
 
 
 
 
 
 
 
Aggregate Intrinsic Value at Period End
75,300,000 
744,500,000 
451,200,000 
 
 
 
 
 
 
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract]
 
 
 
 
 
 
 
 
 
 
Vested or Expected-to-Vest Options, Number of Shares at Period End
36,900,000 
 
 
 
 
 
 
 
 
 
Vested or Expected-to-Vest Options, Weighted Average Exercise Price at Period End
$ 23.66 
 
 
 
 
 
 
 
 
 
Vested and Expected-to-Vest Options, Weighted Average Remaining Contractual Term at Period End
3.7 
 
 
 
 
 
 
 
 
 
Vested or Expected-to-Vest Options, Aggregate Intrinsic Value at Period End
74,200,000 
 
 
 
 
 
 
 
 
 
Exercisable Options, Number of Shares at Period End
26,100,000 
32,100,000 
 
 
 
 
 
 
 
 
Exercisable Options, Weighted Average Exercise Price at Period End
$ 21.51 
$ 20.96 
 
 
 
 
 
 
 
 
Exercisable Options, Weighted Average Remaining Contractual Term at Period End
3.0 
 
 
 
 
 
 
 
 
 
Exercisable Options, Aggregate Intrinsic Value at Period End
61,700,000 
 
 
 
 
 
 
 
 
 
Closing Stock Price At Plan Period End
$ 20.41 
 
 
 
 
 
 
 
 
 
Intrinsic Value of Options Exercise, Pre-Tax
249,800,000 
260,300,000 
83,600,000 
 
 
 
 
 
 
 
Total Fair Value of Options Vested
$ 80,700,000 
$ 83,200,000 
$ 88,900,000 
 
 
 
 
 
 
 
Employee Benefit Plans Employee Benefit Plans, Options Outstanding Exercise Price Range (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Y
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Dec. 31, 2011
$0.33 - $14.91 [Member]
Y
Dec. 31, 2011
$15.00 - $15.09 [Member]
Y
Dec. 31, 2011
$15.32 - $18.96 [Member]
Y
Dec. 31, 2011
$19.45 - $22.74 [Member]
Y
Dec. 31, 2011
$22.97 - $25.16 [Member]
Y
Dec. 31, 2011
$25.19 - $26.90 [Member]
Y
Dec. 31, 2011
$26.97 - $29.89 [Member]
Y
Dec. 31, 2011
$29.93 - $38.93 [Member]
Y
Dec. 31, 2011
$40.26 - $44.00 [Member]
Y
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options
38.6 
 
 
 
4.3 
4.0 
4.4 
4.0 
5.7 
4.6 
4.9 
3.2 
3.5 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term
3.7 
 
 
 
2.2 
3.5 
2.5 
3.8 
3.1 
3.9 
4.8 
4.3 
6.2 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
$ 23.98 
$ 21.90 
$ 20.84 
$ 21.24 
$ 10.84 
$ 15.07 
$ 17.69 
$ 21.27 
$ 24.47 
$ 26.33 
$ 28.58 
$ 33.35 
$ 41.87 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number
26.1 
32.1 
 
 
3.7 
2.7 
3.9 
2.7 
5.3 
3.2 
2.5 
2.1 
0 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price
$ 21.51 
$ 20.96 
 
 
$ 10.45 
$ 15.06 
$ 17.78 
$ 21.36 
$ 24.44 
$ 26.35 
$ 28.46 
$ 32.77 
$ 0.00 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit
 
 
 
 
$ 0.33 
$ 15.00 
$ 15.32 
$ 19.45 
$ 22.97 
$ 25.19 
$ 26.97 
$ 29.93 
$ 40.26 
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit
 
 
 
 
$ 14.91 
$ 15.09 
$ 18.96 
$ 22.74 
$ 25.16 
$ 26.90 
$ 29.89 
$ 38.93 
$ 44.00 
Employee Benefit Plans, Share Based Compensation, Equity Instruments Other Than Options (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended 12 Months Ended
Dec. 31, 2011
Y
Dec. 31, 2010
Y
Dec. 31, 2009
Y
Dec. 31, 2011
Restricted Stock Units (RSUs) [Member]
Dec. 31, 2010
Restricted Stock Units (RSUs) [Member]
Dec. 31, 2009
Restricted Stock Units (RSUs) [Member]
Dec. 31, 2011
Restricted Stock Units (RSUs) [Member]
Minimum [Member]
Y
Dec. 31, 2011
Restricted Stock Units (RSUs) [Member]
Maximum [Member]
Y
Dec. 31, 2011
Performance Share Awards [Member]
Dec. 31, 2010
Performance Share Awards [Member]
Dec. 31, 2009
Performance Share Awards [Member]
Dec. 31, 2011
Restricted Stock Units and Performance Share Awards [Member]
Dec. 31, 2010
Restricted Stock Units and Performance Share Awards [Member]
Dec. 31, 2009
Restricted Stock Units and Performance Share Awards [Member]
Dec. 31, 2008
Restricted Stock Units and Performance Share Awards [Member]
Dec. 31, 2011
Employee Stock Purchase Plan [Member]
month
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Restricted Stock Units Vest From Grant Date In Years
 
 
 
 
 
 
3 
4 
 
 
 
 
 
 
 
 
Share-Based Compensation Arrangement Vesting Period PSA in Years
3 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Restricted Stock Units And Performance Share Awards Activities
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning Balance, Number of Shares
 
 
 
 
 
 
 
 
 
 
 
19,600,000 
14,200,000 
9,100,000 
6,700,000 
 
Beginning Balance, Weighted Average Grant-Date Fair Value
 
 
 
 
 
 
 
 
 
 
 
$ 30.27 
$ 25.94 
$ 21.76 
$ 24.59 
 
Awards Granted, Number of Shares
 
 
 
7,300,000 
4,000,000 
1,800,000 
 
 
4,500,000 1
3,800,000 
2,900,000 
 
 
 
 
 
Awards Granted, Weighted Average Grant-Date Fair Value
 
 
 
$ 31.75 
$ 30.19 
$ 17.87 
 
 
$ 38.64 1
$ 29.25 
$ 18.05 
 
 
 
 
 
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Assumed In Period
 
500,000 2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Share Based Compensation Arrangement By ShareBased Payment Award Equity Instruments Other Than Options Assumed In Period Weighted Average Grant Date Fair Value
 
$ 32.09 2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Awards Vested, Number of Shares
 
 
 
(1,700,000)
(1,800,000)
(1,300,000)
 
 
(800,000)
(400,000)
(100,000)
 
 
 
 
 
Awards Vested, Weighted Average Grant-Date Fair Value
 
 
 
$ 23.26 
$ 25.30 
$ 21.05 
 
 
$ 24.76 
$ 20.64 
$ 26.90 
 
 
 
 
 
Awards Canceled, Number of Shares
 
 
 
(1,000,000)
(600,000)
(700,000)
 
 
(2,900,000)
(400,000)
(200,000)
 
 
 
 
 
Awards Canceled, Weighted Average Grant-Date Fair Value
 
 
 
$ 31.57 
$ 24.87 
$ 24.67 
 
 
$ 30.72 
$ 22.57 
$ 19.12 
 
 
 
 
 
Ending Balance, Number of Shares
 
 
 
 
 
 
 
 
 
 
 
19,600,000 
14,200,000 
9,100,000 
6,700,000 
 
Ending Balance, Weighted Average Grant-Date Fair Value
 
 
 
 
 
 
 
 
 
 
 
$ 30.27 
$ 25.94 
$ 21.76 
$ 24.59 
 
RSUs and PSAs, Weighted Average Remaining Contractual Term at Period End
1.5 
1,700,000.0 
1,600,000.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
RSUs and PSAs, Aggregate Intrinsic Value at Period End
$ 400.5 
$ 522.9 
$ 243.3 
 
 
 
 
 
 
 
 
 
 
 
 
 
Vested and Expected-to-Vest RSUs and PSAs, Number of Shares at Period End
16,700,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Vested and Expected-to-Vest RSUs and PSAs, Weighted Average Grant-Date Fair Value at Period End
$ 29.97 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Vested and Expected-to-Vest RSUs and PSAs, Weighted Average Remaining Contractual Term at Period End
1.3 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Vested and Expected-to-Vest RSUs and PSAs, Aggregate Intrinsic Value at Period End
$ 341.0 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Aggregate Number Of Shares Subject to PSAs Granted
 
 
 
 
 
 
 
 
1,900,000 
 
 
 
 
 
 
 
Minimum shares to be Issued on achievement of performance goals in respect of PSAs
 
 
 
 
 
 
 
 
0 
 
 
 
 
 
 
 
Maximum shares to be issued on achievement of performance goals in respect of PSAs
 
 
 
 
 
 
 
 
4,500,000 
 
 
 
 
 
 
 
Employee Stock Purchase Plan
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Stock based compensation incremental Board approved offering period in months
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
6 
Stock Issued During Period, Shares, Employee Stock Purchase Plans
2,400,000 
2,000,000 
3,200,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
Average Price of Common Stock, Per Share
$ 21.53 
$ 21.20 
$ 12.16 
 
 
 
 
 
 
 
 
 
 
 
 
 
Common Stock, Shares, Issued
526,409,000 
525,378,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
6,000,000 
Common Stock, Capital Shares Reserved for Future Issuance
105,200,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
6,000,000 
Employee Benefit Plans, Shares Available For Grant (Details)
In Millions, unless otherwise specified
12 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2011
Restricted Stock Units and Performance Share Awards [Member]
Jun. 30, 2011
Equity Incentive Plan 2006 [Member]
Jun. 30, 2010
Equity Incentive Plan 2006 [Member]
Dec. 31, 2011
Equity Incentive Plan 2006 [Member]
Shares Available For Grant
 
 
 
 
 
 
 
Beginning Balance, Number of Shares
 
 
 
 
 
 
30.7 
Additional Authorized Share Reserve Approved By Shareholders
 
 
 
 
30.0 
30.0 
30.0 
Awards Granted, Number of Shares
 
 
 
 
 
 
(24.6)1
Options Granted, Number of Shares
(5.6)
(6.2)
(9.9)
 
 
 
(5.6)
Awards Canceled, Number of Shares
 
 
 
 
 
 
8.1 1
Options Canceled, Number of Shares
1.9 
2.3 
2.3 
 
 
 
1.9 2
Options Expired, Number of Shares
0.6 
0.8 
(5.2)
 
 
 
0.6 2
Ending Balance, Number of Shares
 
 
 
 
 
 
41.1 
Fair Market Value on Date of Grant For RSUS And PSAS Issued at Discount, Maximum Percentage
 
 
 
100.00% 
 
 
 
Common Stock for Each Share Subject to RSUs and PSAs
 
 
 
2.1 
 
 
 
Employee Benefit Plans, Assumptions and Resulting Estimates of Fair Value (Details)
12 Months Ended
Dec. 31, 2011
Y
Dec. 31, 2010
Y
Dec. 31, 2009
Y
Employee Stock Purchase Plan 2008 [Member]
 
 
 
Estimates of Fair Value
 
 
 
Expected Volatility Rate
41.00% 
35.00% 
54.00% 
Risk Free Interest Rate
0.20% 
0.20% 
0.40% 
Expected Term
0.5 
0.5 
0.5 
Dividend yield
0.00% 
0.00% 
0.00% 
Weighted-average fair value per share
$ 7.48 
$ 6.55 
$ 5.54 
Stock Options [Member]
 
 
 
Estimates of Fair Value
 
 
 
Expected Volatility Rate
43.00% 
38.00% 
50.00% 
Risk Free Interest Rate
1.50% 
2.00% 
1.60% 
Expected Term
4 
4 
4 
Dividend yield
0.00% 
0.00% 
0.00% 
Weighted-average fair value per share
$ 13.17 
$ 9.77 
$ 7.41 
Employee Benefit Plans, Share Based Compensation by Cost and Expense Categories (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Stock Based Compensation Expense Recorded in Cost and Expense Categories
 
 
 
Share-Based Compensation Expense
$ 222.2 
$ 182.0 
$ 139.7 
Cost of Revenues, Product [Member]
 
 
 
Stock Based Compensation Expense Recorded in Cost and Expense Categories
 
 
 
Share-Based Compensation Expense
4.6 
4.4 
3.9 
Cost of Revenues, Service [Member]
 
 
 
Stock Based Compensation Expense Recorded in Cost and Expense Categories
 
 
 
Share-Based Compensation Expense
15.7 
13.5 
10.5 
Research and Development Expense [Member]
 
 
 
Stock Based Compensation Expense Recorded in Cost and Expense Categories
 
 
 
Share-Based Compensation Expense
97.7 
78.5 
59.3 
Selling and Marketing Expense [Member]
 
 
 
Stock Based Compensation Expense Recorded in Cost and Expense Categories
 
 
 
Share-Based Compensation Expense
70.9 
54.9 
43.1 
General and Administrative Expense [Member]
 
 
 
Stock Based Compensation Expense Recorded in Cost and Expense Categories
 
 
 
Share-Based Compensation Expense
$ 33.3 
$ 30.7 
$ 22.9 
Employee Benefit Plans, Share Based Compensation by Share Based Payment Award Types (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Share-based Compensation Expense by Award Type
 
 
 
Share-Based Compensation Expense
$ 222.2 
$ 182.0 
$ 139.7 
Employee Benefit Textuals [Abstract]
 
 
 
Employee Contribution Matched in Percent
25.00% 
 
 
Matching Contributions to Plan
16.3 
13.2 
11.9 
Deferred Compensation Liability
9.3 
8.1 
 
Stock Options [Member]
 
 
 
Share-based Compensation Expense by Award Type
 
 
 
Share-Based Compensation Expense
76.2 
81.5 
81.2 
Employee Benefit Textuals [Abstract]
 
 
 
Unrecognized Compensation Cost Related to Unvested Stock Options - Adjusted for Forfeitures
94.8 
 
 
Weighted Average Period that Unrecognized Compensation Cost Will be Recognized (years)
2.3 
 
 
Assumed Options [Member]
 
 
 
Share-based Compensation Expense by Award Type
 
 
 
Share-Based Compensation Expense
0 
0.8 
0 
RSU's and PSA's
 
 
 
Share-based Compensation Expense by Award Type
 
 
 
Share-Based Compensation Expense
4.4 
4.2 
0 
Employee Benefit Textuals [Abstract]
 
 
 
Unrecognized Compensation Cost Related to Unvested Stock Options - Adjusted for Forfeitures
247.4 
 
 
Weighted Average Period that Unrecognized Compensation Cost Will be Recognized (years)
2.1 
 
 
Assumed Restricted Stock Units [Member]
 
 
 
Share-based Compensation Expense by Award Type
 
 
 
Share-Based Compensation Expense
0 
0.6 
0 
Employee Stock Purchase Plan [Member]
 
 
 
Share-based Compensation Expense by Award Type
 
 
 
Share-Based Compensation Expense
123.1 
81.8 
44.1 
Other Acquisition Related Compensation [Member]
 
 
 
Share-based Compensation Expense by Award Type
 
 
 
Share-Based Compensation Expense
$ 18.5 
$ 13.1 
$ 14.4 
Segments (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Net Revenues [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Total net revenues
$ 1,120,800,000 
$ 1,105,800,000 
$ 1,120,500,000 
$ 1,101,600,000 
$ 1,190,000,000 
$ 1,012,400,000 
$ 978,300,000 
$ 912,600,000 
$ 4,448,709,000 
$ 4,093,266,000 
$ 3,315,912,000 
Segment Operating Income [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Total segment operating income
 
 
 
 
 
 
 
 
917,300,000 
981,700,000 
668,400,000 
Amortization of purchased intangible assets
 
 
 
 
 
 
 
 
(27,100,000)1
(8,600,000)1
(15,400,000)1
Share-based Compensation Expense
 
 
 
 
 
 
 
 
(222,200,000)
(182,000,000)
(139,700,000)
Share-based payroll tax expense
 
 
 
 
 
 
 
 
(9,300,000)
(6,400,000)
(800,000)
Restructuring
(15,000,000)2
(16,800,000)2
900,000 
300,000 
(2,300,000)3
(200,000)3
(200,000)3
(8,100,000)3
(30,564,000)
(10,805,000)
(19,463,000)
Acquisition-related and other charges
 
 
 
 
 
 
 
 
(9,600,000)4
(6,300,000)4
(182,300,000)4
Operating income
133,200,000 
137,000,000 
170,900,000 
177,400,000 
226,800,000 
195,500,000 
185,000,000 
160,300,000 
618,524,000 
767,584,000 
310,695,000 
Other (expense) income, net
(10,700,000)
(15,900,000)
(13,700,000)
(6,500,000)
4,800,000 
200,000 
4,000,000 
1,400,000 
(46,808,000)
10,570,000 
1,366,000 
Income before income taxes and noncontrolling interest
122,500,000 
121,100,000 
157,200,000 
170,900,000 
231,600,000 
195,700,000 
189,000,000 
161,700,000 
571,716,000 
778,154,000 
312,061,000 
Depreciation by Segment [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Depreciation
 
 
 
 
 
 
 
 
142,160,000 
146,757,000 
132,946,000 
Infrastructure Segment [Member]
 
 
 
 
 
 
 
 
 
 
 
Net Revenues [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Total net revenues
 
 
 
 
 
 
 
 
3,422,600,000 
3,050,300,000 
2,441,600,000 
Segment Operating Income [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Total segment operating income
 
 
 
 
 
 
 
 
718,300,000 
773,700,000 
541,400,000 
Depreciation by Segment [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Depreciation
 
 
 
 
 
 
 
 
110,000,000 
108,900,000 
94,000,000 
Infrastructure Routers [Member]
 
 
 
 
 
 
 
 
 
 
 
Net Revenues [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Total net revenues
 
 
 
 
 
 
 
 
2,894,400,000 
2,655,700,000 
2,244,200,000 
Infrastructure Switches [Member]
 
 
 
 
 
 
 
 
 
 
 
Net Revenues [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Total net revenues
 
 
 
 
 
 
 
 
528,200,000 
394,600,000 
197,400,000 
Service Layer Technologies Segment [Member]
 
 
 
 
 
 
 
 
 
 
 
Net Revenues [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Total net revenues
 
 
 
 
 
 
 
 
1,026,100,000 
1,043,000,000 
874,300,000 
Segment Operating Income [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Total segment operating income
 
 
 
 
 
 
 
 
199,000,000 
208,000,000 
127,000,000 
Depreciation by Segment [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Depreciation
 
 
 
 
 
 
 
 
$ 32,200,000 
$ 37,900,000 
$ 39,000,000 
Segments, Geographical (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Net Revenues by Geographic Region [Line Items]
 
 
 
 
 
 
 
 
 
 
 
Total net revenues
$ 1,120,800 
$ 1,105,800 
$ 1,120,500 
$ 1,101,600 
$ 1,190,000 
$ 1,012,400 
$ 978,300 
$ 912,600 
$ 4,448,709 
$ 4,093,266 
$ 3,315,912 
United States
 
 
 
 
 
 
 
 
 
 
 
Net Revenues by Geographic Region [Line Items]
 
 
 
 
 
 
 
 
 
 
 
Total net revenues
 
 
 
 
 
 
 
 
2,015,800 
1,890,100 
1,515,100 
Other Americas [Member]
 
 
 
 
 
 
 
 
 
 
 
Net Revenues by Geographic Region [Line Items]
 
 
 
 
 
 
 
 
 
 
 
Total net revenues
 
 
 
 
 
 
 
 
222,200 
205,500 
172,800 
Total Americas [Member]
 
 
 
 
 
 
 
 
 
 
 
Net Revenues by Geographic Region [Line Items]
 
 
 
 
 
 
 
 
 
 
 
Total net revenues
 
 
 
 
 
 
 
 
2,238,000 
2,095,600 
1,687,900 
Europe Middle East And Africa [Member]
 
 
 
 
 
 
 
 
 
 
 
Net Revenues by Geographic Region [Line Items]
 
 
 
 
 
 
 
 
 
 
 
Total net revenues
 
 
 
 
 
 
 
 
1,339,800 
1,189,300 
953,200 
Asia Pacific [Member]
 
 
 
 
 
 
 
 
 
 
 
Net Revenues by Geographic Region [Line Items]
 
 
 
 
 
 
 
 
 
 
 
Total net revenues
 
 
 
 
 
 
 
 
$ 870,900 
$ 808,400 
$ 674,800 
Segments, Major Customers (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Customer Concentration Risk [Member]
 
 
 
Concentration Risk [Line Items]
 
 
 
Number of Customers Accounting for Ten Percent or More of Net Revenues
0 
 
 
Major Customers Revenues As Percentage Of Net Revenues
 
10.60% 
10.40% 
Property, Plant, and Equipment [Member] |
Geographic Concentration Risk [Member] |
UNITED STATES
 
 
 
Concentration Risk [Line Items]
 
 
 
Concentration Risk, Percentage
80.00% 
80.00% 
 
Income Taxes (Details) (USD $)
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Sep. 30, 2011
Sep. 30, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Components of income before provision for income taxes and noncontrolling interest:
 
 
 
 
 
 
 
 
 
 
 
 
 
Domestic
 
 
 
 
 
 
 
 
 
 
$ 218,400,000 
$ 370,600,000 
$ 50,100,000 
Foreign
 
 
 
 
 
 
 
 
 
 
353,300,000 
407,600,000 
262,000,000 
Income before income taxes and noncontrolling interest
122,500,000 
121,100,000 
157,200,000 
170,900,000 
231,600,000 
195,700,000 
189,000,000 
161,700,000 
 
 
571,716,000 
778,154,000 
312,061,000 
Current (benefit) provision:
 
 
 
 
 
 
 
 
 
 
 
 
 
Federal
 
 
 
 
 
 
 
 
 
 
19,500,000 
(8,400,000)
123,800,000 
State
 
 
 
 
 
 
 
 
 
 
900,000 
1,000,000 
21,400,000 
Foreign
 
 
 
 
 
 
 
 
 
 
47,800,000 
44,200,000 
43,500,000 
Total current provision
 
 
 
 
 
 
 
 
 
 
68,200,000 
36,800,000 
188,700,000 
Deferred expense (benefit):
 
 
 
 
 
 
 
 
 
 
 
 
 
Federal
 
 
 
 
 
 
 
 
 
 
23,000,000 
57,500,000 
(42,700,000)
State
 
 
 
 
 
 
 
 
 
 
600,000 
14,000,000 
55,700,000 
Foreign
 
 
 
 
 
 
 
 
 
 
(3,600,000)
(7,500,000)
(5,900,000)
Total deferred expense
 
 
 
 
 
 
 
 
 
 
20,000,000 
64,000,000 
7,100,000 
Income tax benefits attributable to employee stock plan activity
 
 
 
 
 
 
 
 
 
 
 
(73,400,000)
 
Income tax provision
26,300,000 
37,400,000 
41,700,000 
41,300,000 
41,500,000 
61,400,000 
58,700,000 
(2,900,000)
 
 
146,704,000 
158,781,000 
196,833,000 
Provision for income taxes, Income tax reconciliation
 
 
 
 
 
 
 
 
 
 
 
 
 
Expected provision at 35% rate
 
 
 
 
 
 
 
 
 
 
200,100,000 
272,400,000 
109,200,000 
State taxes, net of federal benefit
 
 
 
 
 
 
 
 
 
 
2,000,000 
6,200,000 
(1,600,000)
Foreign income at different tax rates
 
 
 
 
 
 
 
 
 
 
(50,400,000)
(71,500,000)
(33,800,000)
R&D credits
 
 
 
 
 
 
 
 
 
 
(21,300,000)
(18,600,000)
(14,400,000)
Stock-based compensation
 
 
 
 
 
 
 
 
 
 
16,700,000 
(40,200,000)
62,100,000 
Temporary differences not currently benefited
 
 
 
 
 
 
 
 
 
 
0 
10,200,000 
72,800,000 
Other
 
 
 
 
 
 
 
 
 
 
(400,000)
300,000 
2,500,000 
Income Tax Expense (Benefit)
26,300,000 
37,400,000 
41,700,000 
41,300,000 
41,500,000 
61,400,000 
58,700,000 
(2,900,000)
 
 
146,704,000 
158,781,000 
196,833,000 
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
 
 
 
 
 
 
 
 
 
 
 
 
 
Federal statutory rate
 
35.00% 
 
 
 
35.00% 
 
 
35.00% 
35.00% 
 
 
 
Deferred tax assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
Net operating loss carry-forwards
4,400,000 
 
 
 
14,100,000 
 
 
 
 
 
4,400,000 
14,100,000 
 
Foreign tax credit carry-forwards
48,700,000 
 
 
 
40,300,000 
 
 
 
 
 
48,700,000 
40,300,000 
 
Research and other credit carry-forwards
86,300,000 
 
 
 
68,200,000 
 
 
 
 
 
86,300,000 
68,200,000 
 
Deferred revenue
94,000,000 
 
 
 
86,100,000 
 
 
 
 
 
94,000,000 
86,100,000 
 
Stock-based compensation
91,200,000 
 
 
 
75,600,000 
 
 
 
 
 
91,200,000 
75,600,000 
 
Reserves and accruals not currently deductible
255,900,000 
 
 
 
227,600,000 
 
 
 
 
 
255,900,000 
227,600,000 
 
Other
31,000,000 
 
 
 
26,800,000 
 
 
 
 
 
31,000,000 
26,800,000 
 
Total deferred tax assets
611,500,000 
 
 
 
538,700,000 
 
 
 
 
 
611,500,000 
538,700,000 
 
Valuation allowance
(145,200,000)
 
 
 
(122,200,000)
 
 
 
 
 
(145,200,000)
(122,200,000)
 
Deferred tax assets, net of valuation allowance
466,300,000 
 
 
 
416,500,000 
 
 
 
 
 
466,300,000 
416,500,000 
 
Deferred tax liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
Property and equipment basis differences
(87,000,000)
 
 
 
(47,100,000)
 
 
 
 
 
(87,000,000)
(47,100,000)
 
Purchased intangibles
(53,200,000)
 
 
 
(58,500,000)
 
 
 
 
 
(53,200,000)
(58,500,000)
 
Unremitted foreign earnings
(210,500,000)
 
 
 
(175,100,000)
 
 
 
 
 
(210,500,000)
(175,100,000)
 
Other
0 
 
 
 
(100,000)
 
 
 
 
 
0 
(100,000)
 
Total deferred tax liabilities
(350,700,000)
 
 
 
(280,800,000)
 
 
 
 
 
(350,700,000)
(280,800,000)
 
Deferred Tax Assets (Liabilities), Net
115,600,000 
 
 
 
135,700,000 
 
 
 
 
 
115,600,000 
135,700,000 
 
Valuation Allowances and Reserves, Period Increase (Decrease)
 
 
 
 
 
 
 
 
 
 
23,000,000 
9,400,000 
 
Operating Loss Carryforwards
9,600,000 
 
 
 
39,600,000 
 
 
 
 
 
9,600,000 
39,600,000 
 
Indefinitely Invested Undistributed Earnings
 
 
 
 
 
 
 
 
 
 
1,462,600,000 
 
 
Estimated Deferred Tax Liability Cumulative Indefinitely Invested Undistributed Earnings
 
 
 
 
 
 
 
 
 
 
447,300,000 
 
 
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
 
 
 
 
 
 
 
 
 
 
 
 
 
Unrecognized Tax Benefits
 
 
 
116,400,000 
 
 
 
183,600,000 
116,400,000 
183,600,000 
116,400,000 
183,600,000 
113,500,000 
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions
 
 
 
 
 
 
 
 
 
 
17,600,000 
13,900,000 
12,700,000 
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions
 
 
 
 
 
 
 
 
 
 
6,400,000 
0 
73,500,000 
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions
 
 
 
 
 
 
 
 
 
 
0 
(73,800,000)
(1,000,000)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities
 
 
 
 
 
 
 
 
 
 
(5,400,000)
(1,600,000)
(12,800,000)
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations
 
 
 
 
 
 
 
 
 
 
(2,800,000)
(5,700,000)
(2,300,000)
Unrecognized Tax Benefits
132,200,000 
 
 
 
116,400,000 
 
 
 
 
 
132,200,000 
116,400,000 
183,600,000 
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
 
 
 
 
 
 
 
 
 
 
 
 
14,800,000 
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
117,200,000 
 
 
 
 
 
 
 
 
 
117,200,000 
 
 
Possible decrease in gross unrecognized tax benefits within next 12 months
 
3,500,000 
 
 
 
 
 
 
3,500,000 
 
 
 
 
Income Tax Reconciliation, Tax Settlements, State and Local
 
 
 
 
 
 
 
 
 
 
7,000,000 
 
 
Income tax benefits attributable to employee stock plan activity
 
 
 
 
 
 
 
 
 
 
(58,500,000)
(58,000,000)
(1,000,000)
California [Member]
 
 
 
 
 
 
 
 
 
 
 
 
 
Deferred tax liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
Tax Credit Carryforward, Amount
159,800,000 
 
 
 
 
 
 
 
 
 
159,800,000 
 
 
Tax Credit Carryforward, Amount, Credit to APIC
21,300,000 
 
 
 
 
 
 
 
 
 
21,300,000 
 
 
Foreign Country [Member]
 
 
 
 
 
 
 
 
 
 
 
 
 
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
 
 
 
 
 
 
 
 
 
 
 
 
 
Interest and penalties recorded
4,600,000 
 
 
 
 
 
 
 
 
 
4,600,000 
 
 
California Deferred Tax Assets [Member]
 
 
 
 
 
 
 
 
 
 
 
 
 
Deferred tax assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
Valuation allowance
(94,300,000)
 
 
 
 
 
 
 
 
 
(94,300,000)
 
 
Massachusetts Deferred Tax Assets [Member]
 
 
 
 
 
 
 
 
 
 
 
 
 
Deferred tax assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
Valuation allowance
(9,700,000)
 
 
 
 
 
 
 
 
 
(9,700,000)
 
 
Capital Loss Carry Forward [Member]
 
 
 
 
 
 
 
 
 
 
 
 
 
Deferred tax assets:
 
 
 
 
 
 
 
 
 
 
 
 
 
Valuation allowance
(41,200,000)
 
 
 
 
 
 
 
 
 
(41,200,000)
 
 
Other Long Term Liabilities [Member]
 
 
 
 
 
 
 
 
 
 
 
 
 
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
 
 
 
 
 
 
 
 
 
 
 
 
 
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
17,300,000 
 
 
 
18,900,000 
 
 
 
 
 
17,300,000 
18,900,000 
23,500,000 
Consolidated Statement Of Operation [Member]
 
 
 
 
 
 
 
 
 
 
 
 
 
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
 
 
 
 
 
 
 
 
 
 
 
 
 
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
$ (1,600,000)
 
 
 
$ (4,600,000)
 
 
 
 
 
$ (1,600,000)
$ (4,600,000)
 
Commitments and Contingencies (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Summarization of principal contractual obligations
 
 
 
Operating leases
$ 352,700,000 
 
 
Purchase commitments
150,600,000 
 
 
Long-term income taxes payable
108,500,000 
 
 
Senior Notes
1,000,000,000 
 
 
Interest Payable
873,100,000 
 
 
Other contractual obligations
73,100,000 
 
 
Total
2,558,000,000 
 
 
Commitments Textuals [Abstract]
 
 
 
Rent expense
65,700,000 
55,900,000 
56,500,000 
Accrual for estimated carrying charges or obsolete materials charges
14,800,000 
 
 
Long-term debt
999,034,000 
0 
 
Indemnity-related and service-related escrows
25,100,000 
 
 
Campus Build Out Commitments
30,700,000 
 
 
Principal Contractual Obligations Maturity Period Current Year [Member]
 
 
 
Summarization of principal contractual obligations
 
 
 
Operating leases
57,900,000 
 
 
Purchase commitments
150,600,000 
 
 
Long-term income taxes payable
0 
 
 
Senior Notes
0 
 
 
Interest Payable
46,900,000 
 
 
Other contractual obligations
63,300,000 
 
 
Total
318,700,000 
 
 
Principal Contractual Obligations Maturity Period Year One [Member]
 
 
 
Summarization of principal contractual obligations
 
 
 
Operating leases
50,800,000 
 
 
Purchase commitments
0 
 
 
Long-term income taxes payable
0 
 
 
Senior Notes
0 
 
 
Interest Payable
46,900,000 
 
 
Other contractual obligations
4,800,000 
 
 
Total
102,500,000 
 
 
Principal Contractual Obligations Maturity Period Year Two [Member]
 
 
 
Summarization of principal contractual obligations
 
 
 
Operating leases
63,800,000 
 
 
Purchase commitments
0 
 
 
Long-term income taxes payable
0 
 
 
Senior Notes
0 
 
 
Interest Payable
46,900,000 
 
 
Other contractual obligations
3,000,000 
 
 
Total
113,700,000 
 
 
Principal Contractual Obligations Maturity Period Year Three [Member]
 
 
 
Summarization of principal contractual obligations
 
 
 
Operating leases
53,400,000 
 
 
Purchase commitments
0 
 
 
Long-term income taxes payable
0 
 
 
Senior Notes
0 
 
 
Interest Payable
46,900,000 
 
 
Other contractual obligations
2,000,000 
 
 
Total
102,300,000 
 
 
Principal Contractual Obligations Maturity Period Year Four [Member]
 
 
 
Summarization of principal contractual obligations
 
 
 
Operating leases
26,600,000 
 
 
Purchase commitments
0 
 
 
Long-term income taxes payable
0 
 
 
Senior Notes
300,000,000 
 
 
Interest Payable
41,900,000 
 
 
Other contractual obligations
0 
 
 
Total
368,500,000 
 
 
Principal Contractual Obligations Maturity Period After Year Four [Member]
 
 
 
Summarization of principal contractual obligations
 
 
 
Operating leases
100,200,000 
 
 
Purchase commitments
0 
 
 
Long-term income taxes payable
0 
 
 
Senior Notes
700,000,000 
 
 
Interest Payable
643,600,000 
 
 
Other contractual obligations
0 
 
 
Total
1,443,800,000 
 
 
Principal Contractual Obligations Other [Member]
 
 
 
Summarization of principal contractual obligations
 
 
 
Operating leases
0 
 
 
Purchase commitments
0 
 
 
Long-term income taxes payable
108,500,000 
 
 
Senior Notes
0 
 
 
Interest Payable
0 
 
 
Other contractual obligations
0 
 
 
Total
$ 108,500,000 
 
 
Commitments and Contingencies, Guarantees (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Guarantor Obligations [Line Items]
 
 
Guarantor obligations, current carrying value
$ 19.9 
$ 21.6 
Selected Quarterly Financial Information (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Net revenues:
 
 
 
 
 
 
 
 
 
 
 
Sales Revenue, Goods, Net
$ 847,500 
$ 861,900 
$ 891,400 
$ 877,400 
$ 962,200 
$ 801,200 
$ 774,100 
$ 721,200 
$ 3,478,264 
$ 3,258,651 
$ 2,567,992 
Sales Revenue, Services, Net
273,300 
243,900 
229,100 
224,200 
227,800 
211,200 
204,200 
191,400 
970,445 
834,615 
747,920 
Total net revenues
1,120,800 
1,105,800 
1,120,500 
1,101,600 
1,190,000 
1,012,400 
978,300 
912,600 
4,448,709 
4,093,266 
3,315,912 
Cost of Revenue [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Cost of Goods Sold
310,600 
286,600 
292,400 
265,700 
299,700 
247,000 
231,800 
222,400 
1,155,283 
1,000,865 
841,722 
Cost of Services
111,300 
107,600 
105,900 
100,000 
98,300 
87,600 
86,600 
78,200 
424,836 
350,654 
290,987 
Total cost of revenues
421,900 
394,200 
398,300 
365,700 
398,000 
334,600 
318,400 
300,600 
1,580,119 
1,351,519 
1,132,709 
Gross margin
698,900 
711,600 
722,200 
735,900 
792,000 
677,800 
659,900 
612,000 
2,868,590 
2,741,747 
2,183,203 
Operating Expenses [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Research and Development Expense
250,500 
257,100 
257,300 
262,000 
254,900 
231,200 
224,800 
207,000 
1,026,790 
917,855 
741,708 
Selling and Marketing Expense
253,200 
254,900 
246,600 
246,300 
257,700 
204,700 
202,300 
192,400 
1,001,060 
857,072 
759,131 
General and Administrative Expense
45,500 
44,500 
44,300 
44,900 
45,100 
43,800 
45,900 
43,100 
179,132 
177,859 
159,459 
Amortization of Intangible Assets
1,200 
1,300 
1,300 
1,500 
900 
900 
1,200 
1,100 
5,366 
4,230 
10,416 
Restructuring, net
15,000 1
16,800 1
(900)
(300)
2,300 2
200 2
200 2
8,100 2
30,564 
10,805 
19,463 
Acquisition-related and other charges
300 3
0 3
2,700 3
4,100 3
4,300 4
1,500 4
500 4
0 4
7,154 
6,342 
0 
Total operating expenses
565,700 
574,600 
551,300 
558,500 
565,200 
482,300 
474,900 
451,700 
2,250,066 
1,974,163 
1,872,508 
Operating income
133,200 
137,000 
170,900 
177,400 
226,800 
195,500 
185,000 
160,300 
618,524 
767,584 
310,695 
Nonoperating Income (Expense)
(10,700)
(15,900)
(13,700)
(6,500)
4,800 
200 
4,000 
1,400 
(46,808)
10,570 
1,366 
Income before income taxes and noncontrolling interest
122,500 
121,100 
157,200 
170,900 
231,600 
195,700 
189,000 
161,700 
571,716 
778,154 
312,061 
Income Tax Expense (Benefit)
26,300 
37,400 
41,700 
41,300 
41,500 
61,400 
58,700 
(2,900)
146,704 
158,781 
196,833 
Consolidated net income
96,200 
83,700 
115,500 
129,600 
190,100 
134,300 
130,300 
164,600 
425,012 
619,373 
115,228 
Net Income (Loss) Attributable to Noncontrolling Interest
0 
0 
0 
100 
100 
200 
200 
(1,500)
124 
(971)
1,771 
Net income attributable to Juniper Networks
$ 96,200 
$ 83,700 
$ 115,500 
$ 129,700 
$ 190,200 
$ 134,500 
$ 130,500 
$ 163,100 
$ 425,136 
$ 618,402 
$ 116,999 
Earnings Per Share [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Earnings Per Share, Basic
$ 0.18 5
$ 0.16 5
$ 0.22 5
$ 0.24 5
$ 0.36 5
$ 0.26 5
$ 0.25 5
$ 0.31 5
$ 0.80 
$ 1.18 
$ 0.22 
Earnings Per Share, Diluted
$ 0.18 5
$ 0.16 5
$ 0.21 5
$ 0.24 5
$ 0.35 5
$ 0.25 5
$ 0.24 5
$ 0.30 5
$ 0.79 
$ 1.15 
$ 0.22 
Subsequent Events Subsequent Events (Details) (USD $)
Share data in Thousands, except Per Share data, unless otherwise specified
12 Months Ended 2 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Feb. 22, 2012
Repurchase of Equity [Member]
Feb. 13, 2012
Business Acquisition Acquired Entity Mykonos [Member]
Acquisition [Member]
Subsequent Event [Line Items]
 
 
 
 
Stock Repurchased and Retired During Period, Shares
17,500 
19,700 
2,400 
 
Stock Repurchased and Retired During Period, Value
$ 541,200,000 
$ 563,500,000 
$ 51,600,000 
 
Common Stock Repurchased Under Stock Repurchase Program Average Purchase Price
$ 30.93 
$ 28.67 
$ 21.75 
 
Stock Repurchase Program, Remaining Authorized Repurchase Amount
 
 
162,200,000 
 
Business Acquisition, Cost of Acquired Entity, Purchase Price
 
$ 394,500,000 
 
$ 80,000,000 
Valuation and Qualifying Accounts Valuation and Qualifying Accounts (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Allowance for Doubtful Accounts [Member]
 
 
 
 
Valuation and Qualifying Accounts Disclosure [Line Items]
 
 
 
 
Valuation Allowances and Reserves, Balance
$ 9.5 
$ 10.1 
$ 9.1 
$ 9.7 
Valuation Allowances and Reserves, Charged to Cost and Expense
(0.2)
1.2 
(0.6)
 
Valuation Allowances and Reserves, Recoveries
(0.4)
(0.2)
0 
 
Sales Returns and Allowances [Member]
 
 
 
 
Valuation and Qualifying Accounts Disclosure [Line Items]
 
 
 
 
Valuation Allowances and Reserves, Balance
52.0 
52.8 
45.6 
36.8 
Valuation Allowances and Reserves, Charged to Cost and Expense
108.8 
104.4 
84.1 
 
Valuation Allowances and Reserves, Recoveries
$ (109.6)
$ (97.2)
$ (75.3)