a) Premiums

For traditional long-duration insurance contracts, we report premiums as earned when due. For short-duration insurance contracts, we report premiums as revenue over the terms of the related insurance policies on a pro-rata basis or in proportion to expected claims.

For single premium mortgage insurance contracts, we report premiums over the estimated policy life in accordance with the expected pattern of risk emergence as further described in our accounting policy for unearned premiums.

Premiums received under annuity contracts without significant mortality risk and premiums received on investment and universal life insurance products are not reported as revenues but rather as deposits and are included in liabilities for policyholder account balances.

b) Net Investment Income and Net Investment Gains and Losses

Investment income is recognized when earned. Income or losses upon call or prepayment of available-for-sale fixed maturity securities is recognized in net investment income, except for hybrid securities where the income or loss upon call is recognized in net investment gains and losses. Investment gains and losses are calculated on the basis of specific identification.

Investment income on mortgage-backed and asset-backed securities is initially based upon yield, cash flow and prepayment assumptions at the date of purchase. Subsequent revisions in those assumptions are recorded using the retrospective or prospective method. Under the retrospective method, used for mortgage-backed and asset-backed securities of high credit quality (ratings equal to or greater than "AA" or that are backed by a U.S. agency) which cannot be contractually prepaid, amortized cost of the security is adjusted to the amount that would have existed had the revised assumptions been in place at the date of purchase. The adjustments to amortized cost are recorded as a charge or credit to net investment income. Under the prospective method, which is used for all other mortgage-backed and asset-backed securities, future cash flows are estimated and interest income is recognized going forward using the new internal rate of return.

c) Insurance and Investment Product Fees and Other

Insurance and investment product fees and other consist primarily of insurance charges assessed on universal and term universal life insurance contracts, fees assessed against customer account values and commission income. For universal and term universal life insurance contracts, charges to policyholder accounts for cost of insurance are recognized as revenue when due. Variable product fees are charged to variable annuity contractholders and variable life insurance policyholders based upon the daily net assets of the contractholder's and policyholder's account values and are recognized as revenue when charged. Policy surrender fees are recognized as income when the policy is surrendered.

d) Investment Securities

At the time of purchase, we designate our investment securities as either available-for-sale or trading and report them in our consolidated balance sheets at fair value. Our portfolio of fixed maturity securities is comprised primarily of investment grade securities. Changes in the fair value of available-for-sale investments, net of the effect on deferred acquisition costs ("DAC"), present value of future profits ("PVFP"), benefit reserves and deferred income taxes, are reflected as unrealized investment gains or losses in a separate component of accumulated other comprehensive income (loss). Realized and unrealized gains and losses related to trading securities are reflected in net investment gains (losses). Trading securities are included in other invested assets in our consolidated balance sheets and primarily represent fixed maturity securities where we utilized the fair value option.

Other-Than-Temporary Impairments On Available-For-Sale Securities

As of each balance sheet date, we evaluate securities in an unrealized loss position for other-than-temporary impairments. For debt securities, we consider all available information relevant to the collectability of the security, including information about past events, current conditions, and reasonable and supportable forecasts, when developing the estimate of cash flows expected to be collected. More specifically for mortgage-backed and asset-backed securities, we also utilize performance indicators of the underlying assets including default or delinquency rates, loan to collateral value ratios, third-party credit enhancements, current levels of subordination, vintage and other relevant characteristics of the security or underlying assets to develop our estimate of cash flows. Estimating the cash flows expected to be collected is a quantitative and qualitative process that incorporates information received from third-party sources along with certain internal assumptions and judgments regarding the future performance of the underlying collateral. Where possible, this data is benchmarked against third-party sources.

Prior to adoption of new accounting guidance related to the recognition and presentation of other-than-temporary impairments on April 1, 2009, we recognized an other-than-temporary impairment on debt securities in an unrealized loss position when we did not expect full recovery of value or did not have the intent and ability to hold such securities until they had fully recovered their amortized cost. The recognition of other-than-temporary impairments prior to April 1, 2009 represented the entire difference between the amortized cost and fair value with this difference being recorded in net income (loss) as an adjustment to the amortized cost of the security.

Beginning on April 1, 2009, we recognize other-than-temporary impairments on debt securities in an unrealized loss position when one of the following circumstances exists:

For other-than-temporary impairments recognized during the period, we present the total other-than-temporary impairments, the portion of other-than-temporary impairments included in other comprehensive income (loss) ("OCI") and the net other-than-temporary impairments as supplemental disclosure presented on the face of our consolidated statements of income.

Total other-than-temporary impairments are calculated as the difference between the amortized cost and fair value that emerged in the current period. For other-than-temporarily impaired securities where we do not intend to sell the security and it is not more likely than not that we will be required to sell the security prior to recovery, total other-than-temporary impairments are adjusted by the portion of other-than-temporary impairments recognized in OCI ("non-credit"). Net other-than-temporary impairments recorded in net income (loss) represent the credit loss on the other-than-temporarily impaired securities with the offset recognized as an adjustment to the amortized cost to determine the new amortized cost basis of the securities.

For securities that were deemed to be other-than-temporarily impaired and a non-credit loss was recorded in OCI, the amount recorded as an unrealized gain (loss) represents the difference between the current fair value and the new amortized cost for each period presented. The unrealized gain (loss) on an other-than-temporarily impaired security is recorded as a separate component in OCI until the security is sold or until we record an other-than-temporary impairment where we intend to sell the security or will be required to sell the security prior to recovery.

To estimate the amount of other-than-temporary impairment attributed to credit losses on debt securities where we do not intend to sell the security and it is not more likely than not that we will be required to sell the security prior to recovery, we determine our best estimate of the present value of the cash flows expected to be collected from a security by discounting these cash flows at the current effective yield on the security prior to recording any other-than-temporary impairment. If the present value of the discounted cash flows is lower than the amortized cost of the security, the difference between the present value and amortized cost represents the credit loss associated with the security with the remaining difference between fair value and amortized cost recorded as a non-credit other-than-temporary impairment in OCI.

The evaluation of other-than-temporary impairments is subject to risks and uncertainties and is intended to determine the appropriate amount and timing for recognizing an impairment charge. The assessment of whether such impairment has occurred is based on management's best estimate of the cash flows expected to be collected at the individual security level. We regularly monitor our investment portfolio to ensure that securities that may be other-than-temporarily impaired are identified in a timely manner and that any impairment charge is recognized in the proper period.

While the other-than-temporary impairment model for debt securities generally includes fixed maturity securities, there are certain hybrid securities that are classified as fixed maturity securities where the application of a debt impairment model depends on whether there has been any evidence of deterioration in credit of the issuer. Under certain circumstances, evidence of deterioration in credit of the issuer may result in the application of the equity securities impairment model.

For equity securities, we recognize an impairment charge in the period in which we determine that the security will not recover to book value within a reasonable period. We determine what constitutes a reasonable period on a security-by-security basis based upon consideration of all the evidence available to us, including the magnitude of an unrealized loss and its duration. In any event, this period does not exceed 18 months for common equity securities. We measure other-than-temporary impairments based upon the difference between the amortized cost of a security and its fair value.

e) Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We have fixed maturity, equity and trading securities, derivatives, embedded derivatives, securities held as collateral, separate account assets and certain other financial instruments, which are carried at fair value.

Fair value measurements are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our view of market assumptions in the absence of observable market information. We utilize valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. All assets and liabilities carried at fair value are classified and disclosed in one of the following three categories:

Level 1 primarily consists of financial instruments whose value is based on quoted market prices such as exchange-traded derivatives and actively traded mutual fund investments.

Level 2 includes those financial instruments that are valued using industry-standard pricing methodologies, models or other valuation methodologies. These models are primarily industry-standard models that consider various inputs, such as interest rate, credit spread and foreign exchange rates for the underlying financial instruments. All significant inputs are observable, or derived from observable, information in the marketplace or are supported by observable levels at which transactions are executed in the marketplace. Financial instruments in this category primarily include: certain public and private corporate fixed maturity and equity securities; government or agency securities; certain mortgage-backed and asset-backed securities; securities held as collateral; and certain non-exchange-traded derivatives such as interest rate or cross currency swaps.

Level 3 is comprised of financial instruments whose fair value is estimated based on industry-standard pricing methodologies and internally developed models utilizing significant inputs not based on, nor corroborated by, readily available market information. In limited instances, this category may also utilize non-binding broker quotes. This category primarily consists of certain less liquid fixed maturity, equity and trading securities and certain derivative instruments or embedded derivatives where we cannot corroborate the significant valuation inputs with market observable data.

As of each reporting period, all assets and liabilities recorded at fair value are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability, such as the relative impact on the fair value as a result of including a particular input. We review the fair value hierarchy classifications each reporting period. Changes in the observability of the valuation attributes may result in a reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in and out of Level 3 at the beginning fair value for the reporting period in which the changes occur. See note 17 for additional information related to fair value measurements.

f) Commercial Mortgage Loans

Commercial mortgage loans are stated at principal amounts outstanding, net of deferred expenses and allowance for loan loss. Interest on loans is recognized on an accrual basis at the applicable interest rate on the principal amount outstanding. Loan origination fees and direct costs, as well as premiums and discounts, are amortized as level yield adjustments over the respective loan terms. Unamortized net fees or costs are recognized upon early repayment of the loans. Loan commitment fees are deferred and amortized on an effective yield basis over the term of the loan. Commercial mortgage loans are considered past due when contractual payments have not been received from the borrower by the required payment date.

"Impaired" loans are defined by U.S. GAAP as loans for which it is probable that the lender will be unable to collect all amounts due according to original contractual terms of the loan agreement. In determining whether it is probable that we will be unable to collect all amounts due, we consider current payment status, debt service coverage ratios, occupancy levels and current loan-to-value. Impaired loans are carried on a non-accrual status. Loans are placed on non-accrual status when, in management's opinion, the collection of principal or interest is unlikely, or when the collection of principal or interest is 90 days or more past due. Income on impaired loans is not recognized until the loan is sold or the cash received exceeds the carrying amount recorded.

We evaluate the impairment of commercial mortgage loans first on an individual loan basis. If an individual loan is not deemed impaired, then we evaluate the remaining loans collectively to determine whether an impairment should be recorded.

For individually impaired loans, we record an impairment charge when it is probable that a loss has been incurred. The impairment is recorded as an increase in the allowance for loan losses. All losses of principal are charged to the allowance for loan losses in the period in which the loan is deemed to be uncollectible.

For loans that are not individually impaired where we evaluate the loans collectively, the allowance for loan losses is maintained at a level that we determine is adequate to absorb estimated probable incurred losses in the loan portfolio. Our process to determine the adequacy of the allowance utilizes an analytical model based on historical loss experience adjusted for current events, trends and economic conditions that would result in a loss in the loan portfolio over the next twelve months. Key inputs into our evaluation include debt service coverage ratios, loan-to-value, property-type, occupancy levels, geographic region, and probability weighting of the scenarios generated by the model. The actual amounts realized could differ in the near term from the amounts assumed in arriving at the allowance for loan losses reported in the consolidated financial statements. Additions and reductions to the allowance through periodic provisions or benefits are recorded in net investment gains (losses).

For commercial mortgage loans classified as held-for-sale, each loan is carried at the lower of cost or market and is included in commercial mortgage loans in our consolidated balance sheets. See note 4 for additional disclosures related to commercial mortgage loans.

i) Cash and Cash Equivalents

Certificates of deposit, money market funds and other time deposits with original maturities of 90 days or less are considered cash equivalents in the consolidated balance sheets and consolidated statements of cash flows. Items with maturities greater than 90 days but less than one year at the time of acquisition are considered short-term investments.

j) Deferred Acquisition Costs

Acquisition costs include costs that vary with and are primarily related to the acquisition of insurance and investment contracts. Such costs are deferred and amortized as follows:

Long-Duration Contracts. Acquisition costs include commissions in excess of ultimate renewal commissions, solicitation and printing costs, sales material and some support costs, such as underwriting and contract and policy issuance expenses. Amortization for traditional long-duration insurance products is determined as a level proportion of premium based on commonly accepted actuarial methods and reasonable assumptions about mortality, morbidity, lapse rates, expenses and future yield on related investments established when the contract or policy is issued. Amortization is adjusted each period to reflect policy lapse or termination rates as compared to anticipated experience. Amortization for annuity contracts without significant mortality risk and for investment and universal life insurance products is based on estimated gross profits. Estimated gross profits are adjusted quarterly to reflect actual experience to date or for the unlocking of underlying key assumptions relating to future gross profits based on experience studies.

Short-Duration Contracts. Acquisition costs consist primarily of commissions and premium taxes and are amortized ratably over the terms of the underlying policies.

We regularly review all of these assumptions and periodically test DAC for recoverability. For deposit products, if the current present value of estimated future gross profits is less than the unamortized DAC for a line of business, a charge to income is recorded for additional DAC amortization, and for certain products, an increase in benefit reserves may be required. For other products, if the benefit reserve plus anticipated future premiums and interest income for a line of business are less than the current estimate of future benefits and expenses (including any unamortized DAC), a charge to income is recorded for additional DAC amortization or for increased benefit reserves. See note 6 for additional information related to DAC including loss recognition and recoverability.

k) Intangible Assets

Present Value of Future Profits. In conjunction with the acquisition of a block of insurance policies or investment contracts, a portion of the purchase price is assigned to the right to receive future gross profits arising from existing insurance and investment contracts. This intangible asset, called PVFP, represents the actuarially estimated present value of future cash flows from the acquired policies. PVFP is amortized, net of accreted interest, in a manner similar to the amortization of DAC.

We regularly review all of these assumptions and periodically test PVFP for recoverability. For deposit products, if the current present value of estimated future gross profits is less than the unamortized PVFP for a line of business, a charge to income is recorded for additional PVFP amortization. For other products, if the benefit reserve plus anticipated future premiums and interest income for a line of business are less than the current estimate of future benefits and expenses (including any unamortized PVFP), a charge to income is recorded for additional PVFP amortization or for increased benefit reserves. For the years ended December 31, 2011, 2010 and 2009, no charges to income were recorded as a result of our PVFP recoverability or loss recognition testing.

Deferred Sales Inducements to Contractholders. We defer sales inducements to contractholders for features on variable annuities that entitle the contractholder to an incremental amount to be credited to the account value upon making a deposit, and for fixed annuities with crediting rates higher than the contract's expected ongoing crediting rates for periods after the inducement. Deferred sales inducements to contractholders are reported as a separate intangible asset and amortized in benefits and other changes in policy reserves using the same methodology and assumptions used to amortize DAC.

Other Intangible Assets. We amortize the costs of other intangibles over their estimated useful lives unless such lives are deemed indefinite. Amortizable intangible assets are tested for impairment based on undiscounted cash flows, which requires the use of estimates and judgment, and, if impaired, written down to fair value based on either discounted cash flows or appraised values. Intangible assets with indefinite lives are tested at least annually for impairment and written down to fair value as required.

l) Goodwill

Goodwill is not amortized but is tested for impairment at least annually and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying value. We test goodwill using a fair value approach, which requires the use of estimates and judgment, at the "reporting unit" level. A reporting unit is the operating segment, or a business one level below that operating segment (the "component" level) if discrete financial information is prepared and regularly reviewed by management at the component level. We recognize an impairment charge for any amount by which the carrying amount of a reporting unit's goodwill exceeds its fair value.

The determination of fair value for our reporting units is primarily based on an income approach whereby we use discounted cash flows for each reporting unit. When available and as appropriate, we use market approaches or other valuation techniques to corroborate discounted cash flow results. The discounted cash flow model used for each reporting unit is based on either: operating income or statutory distributable income, depending on the reporting unit being valued.

The cash flows used to determine fair value are dependent on a number of significant management assumptions based on our historical experience, our expectations of future performance, and expected economic environment. Our estimates are subject to change given the inherent uncertainty in predicting future performance and cash flows, which are impacted by such things as policyholder behavior, competitor pricing, new product introductions and specific industry and market conditions. Additionally, the discount rate used in our discounted cash flow approach is based on management's judgment of the appropriate rate for each reporting unit based on the relative risk associated with the projected cash flows.

See note 8 for additional information related to goodwill and impairments recorded.

Premium revenue, benefits and acquisition and operating expenses, net of deferrals, are reported net of the amounts relating to reinsurance ceded to and assumed from other companies. Amounts due from reinsurers for incurred and estimated future claims are reflected in the reinsurance recoverable asset. Amounts received from reinsurers that represent recovery of acquisition costs are netted against DAC so that the net amount is capitalized. The cost of reinsurance is accounted for over the terms of the related treaties using assumptions consistent with those used to account for the underlying reinsured policies. Premium revenue, benefits and acquisition and operating expenses, net of deferrals, for reinsurance contracts that do not qualify for reinsurance accounting are accounted for under the deposit method of accounting.

n) Derivatives

Derivative instruments are used to manage risk through one of four principal risk management strategies including: (i) liabilities; (ii) invested assets; (iii) portfolios of assets or liabilities; and (iv) forecasted transactions.

On the date we enter into a derivative contract, management designates the derivative as a hedge of the identified exposure (fair value, cash flow or foreign currency). If a derivative does not qualify for hedge accounting, the changes in its fair value and all scheduled periodic settlement receipts and payments are reported in income.

We formally document all relationships between hedging instruments and hedged items, as well as our risk management objective and strategy for undertaking various hedge transactions. In this documentation, we specifically identify the asset, liability or forecasted transaction that has been designated as a hedged item, state how the hedging instrument is expected to hedge the risks related to the hedged item, and set forth the method that will be used to retrospectively and prospectively assess the hedging instrument's effectiveness and the method that will be used to measure hedge ineffectiveness. We generally determine hedge effectiveness based on total changes in fair value of the hedged item attributable to the hedged risk and the total changes in fair value of the derivative instrument.

We discontinue hedge accounting prospectively when: (i) it is determined that the derivative is no longer effective in offsetting changes in the fair value or cash flows of a hedged item; (ii) the derivative expires or is sold, terminated or exercised; (iii) the derivative is de-designated as a hedge instrument; or (iv) it is no longer probable that the forecasted transaction will occur.

For all qualifying and highly effective cash flow hedges, the effective portion of changes in fair value of the derivative instrument is reported as a component of OCI. The ineffective portion of changes in fair value of the derivative instrument is reported as a component of income. When hedge accounting is discontinued because it is probable that a forecasted transaction will not occur, the derivative continues to be carried in the consolidated balance sheets at its fair value, and gains and losses that were accumulated in OCI are recognized immediately in income. When the hedged forecasted transaction is no longer probable, but is reasonably possible, the accumulated gain or loss remains in OCI and is recognized when the transaction affects income; however, prospective hedge accounting for the transaction is terminated. In all other situations in which hedge accounting is discontinued on a cash flow hedge, amounts previously deferred in OCI are reclassified into income when income is impacted by the variability of the cash flow of the hedged item.

For all qualifying and highly effective fair value hedges, the changes in fair value of the derivative instrument are reported in income. In addition, changes in fair value attributable to the hedged portion of the underlying instrument are reported in income. When hedge accounting is discontinued because it is determined that the derivative no longer qualifies as an effective fair value hedge, the derivative continues to be carried in the consolidated balance sheets at its fair value, but the hedged asset or liability will no longer be adjusted for changes in fair value. In all other situations in which hedge accounting is discontinued, the derivative is carried at its fair value in the consolidated balance sheets, with changes in its fair value recognized in the current period as income.

We may enter into contracts that are not themselves derivative instruments but contain embedded derivatives. For each contract, we assess whether the economic characteristics of the embedded derivative are clearly and closely related to those of the host contract and determine whether a separate instrument with the same terms as the embedded instrument would meet the definition of a derivative instrument.

If it is determined that the embedded derivative possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract, and that a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is separated from the host contract and accounted for as a stand-alone derivative. Such embedded derivatives are recorded in the consolidated balance sheets at fair value and are classified consistent with their host contract. Changes in their fair value are recognized in the current period in income. If we are unable to properly identify and measure an embedded derivative for separation from its host contract, the entire contract is carried in the consolidated balance sheets at fair value, with changes in fair value recognized in the current period in income.

Changes in the fair value of non-qualifying derivatives, including embedded derivatives, changes in fair value of certain derivatives and related hedged items in fair value hedge relationships and hedge ineffectiveness on cash flow hedges are reported in net investment gains (losses).

o) Separate Accounts

The separate account assets represent funds for which the investment income and investment gains and losses accrue directly to the variable annuity contractholders and variable life insurance policyholders. We assess mortality and expense risk fees and administration charges on the assets allocated to the separate accounts. The separate account assets are carried at fair value and are equal to the liabilities that represent the contractholders' and policyholders' equity in those assets.

p) Insurance Reserves

Future Policy Benefits

Policyholder Account Balances

We include investment-type contracts and our universal life insurance contracts in the liability for policyholder account balances. Investment-type contracts are broadly defined to include contracts without significant mortality or morbidity risk. Payments received from sales of investment contracts are recognized by providing a liability equal to the current account value of the policyholders' contracts. Interest rates credited to investment contracts are guaranteed for the initial policy term with renewal rates determined as necessary by management.

r) Unearned Premiums

For single premium insurance contracts, we recognize premiums over the policy life in accordance with the expected pattern of risk emergence. We recognize a portion of the revenue in premiums earned in the current period, while the remaining portion is deferred as unearned premiums and earned over time in accordance with the expected pattern of risk emergence. If single premium policies are cancelled and the premium is non-refundable, then the remaining unearned premium related to each cancelled policy is recognized to earned premiums upon notification of the cancellation. Expected pattern of risk emergence on which we base premium recognition is inherently judgmental and is based on actuarial analysis of historical experience. We periodically review our premium earnings recognition models with any adjustments to the estimates reflected in current period income. For the years ended December 31, 2011, 2010 and 2009, we updated our premium recognition factors for our international mortgage insurance business. These updates included the consideration of recent and projected loss experience, policy cancellation experience and refinement of actuarial methods. In 2011, 2010 and 2009, adjustments associated with this update resulted in an increase in earned premiums of $46 million, $52 million and $49 million, respectively.

s) Stock-Based Compensation

 We determine a grant date fair value and recognize the related compensation expense, adjusted for expected forfeitures, through the income statement over the respective vesting period of the awards.

t) Employee Benefit Plans

We provide employees with a defined contribution pension plan and recognize expense throughout the year based on the employee's age, service and eligible pay. We make an annual contribution to the plan. We also provide employees with defined contribution savings plans. We recognize expense for our contributions to the savings plans at the time employees make contributions to the plans.

Some employees participate in defined benefit pension and postretirement benefit plans. We recognize expense for these plans based upon actuarial valuations performed by external experts. We estimate aggregate benefits by using assumptions for employee turnover, future compensation increases, rates of return on pension plan assets and future health care costs. We recognize an expense for differences between actual experience and estimates over the average future service period of participants. We recognize the overfunded or underfunded status of a defined benefit plan as an asset or liability in our consolidated balance sheets and recognize changes in that funded status in the year in which the changes occur through OCI.

u) Income Taxes

We determine deferred tax assets and/or liabilities by multiplying the differences between the financial reporting and tax reporting bases for assets and liabilities by the enacted tax rates expected to be in effect when such differences are recovered or settled if there is no change in law. The effect on deferred taxes of a change in tax rates is recognized in income in the period that includes the enactment date. Valuation allowances on deferred tax assets are estimated based on our assessment of the realizability of such amounts.

v) Foreign Currency Translation

The determination of the functional currency is made based on the appropriate economic and management indicators. The assets and liabilities of foreign operations are translated into U.S. dollars at the exchange rates in effect at the consolidated balance sheet date. Translation adjustments are included as a separate component of accumulated other comprehensive income (loss). Revenues and expenses of the foreign operations are translated into U.S. dollars at the average rates of exchange during the period of the transaction. Gains and losses from foreign currency transactions are reported in income and have not been material in any years presented in our consolidated statements of income.