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Investments and Derivative Instruments Level 4 Investment Income (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Investment Income [Line Items] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | [1] | $ (104,000,000) |  | $ (353,000,000) |  | $ (125,000,000) |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  | 28,000,000 |  | 23,000,000 |  | (1,574,000,000) |  |
Net Investment Income [Abstract] |  |  |  |  |  |  |  |
Net Investment Income |  | 3,030,000,000 |  | 3,154,000,000 |  | 3,264,000,000 |  |
Investment Income, Investment Expense |  | (118,000,000) |  | (122,000,000) |  | (115,000,000) |  |
Net Realized Capital Gains (Losses) Table [Abstract] |  |  |  |  |  |  |  |
Gain on Derivative Instruments, Pretax |  | 460,000,000 |  | 527,000,000 |  | 2,313,000,000 |  |
Loss on Derivative Instruments, Pretax |  | 405,000,000 |  | 250,000,000 |  | 659,000,000 |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net |  | 102,000,000 |  | 59,000,000 |  | 73,000,000 |  |
Periodic Net Coupon Settlements on Credit Derivatives |  | 11,000,000 |  | 1,000,000 |  | (8,000,000) |  |
Realized Investment Gains (Losses) |  | (156,000,000) |  | 16,000,000 |  | 1,798,000,000 |  |
Gain (Loss) on Investments, Excluding Other than Temporary Impairments |  | (54,000,000) |  | 75,000,000 |  | 296,000,000 |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status |  | 2,000,000 |  | 0 |  | 2,000,000 |  |
Sale of Available-for-sale Securities [Abstract] |  |  |  |  |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held |  | 324,000,000 |  | 424,000,000 |  | 552,000,000 |  | $ 1,013,000,000
Fixed Maturities [Member] |  |  |  |  |  |  |  |
Net Investment Income [Abstract] |  |  |  |  |  |  |  |
Net Investment Income | [3] | 2,409,000,000 | [2] | 2,420,000,000 | [2] | 2,552,000,000 |  |
Equity Securities [Member] |  |  |  |  |  |  |  |
Net Investment Income [Abstract] |  |  |  |  |  |  |  |
Net Investment Income |  | 25,000,000 |  | 38,000,000 |  | 30,000,000 |  |
Net Realized Capital Gains (Losses) Table [Abstract] |  |  |  |  |  |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net |  | 16,000,000 |  | 2,000,000 |  | 15,000,000 |  |
Mortgage Loans on Real Estate [Member] |  |  |  |  |  |  |  |
Net Investment Income [Abstract] |  |  |  |  |  |  |  |
Net Investment Income |  | 267,000,000 |  | 265,000,000 |  | 260,000,000 |  |
Policy Loans [Member] |  |  |  |  |  |  |  |
Net Investment Income [Abstract] |  |  |  |  |  |  |  |
Net Investment Income |  | 82,000,000 |  | 80,000,000 |  | 83,000,000 |  |
Limited Partnerships and Other Alternative Investments [Member] |  |  |  |  |  |  |  |
Net Investment Income [Abstract] |  |  |  |  |  |  |  |
Net Investment Income |  | 227,000,000 |  | 294,000,000 |  | 287,000,000 |  |
Other Investments [Member] |  |  |  |  |  |  |  |
Net Investment Income [Abstract] |  |  |  |  |  |  |  |
Net Investment Income | [5] | 138,000,000 | [4] | 179,000,000 | [4] | 167,000,000 |  |
Net Realized Capital Gains (Losses) Table [Abstract] |  |  |  |  |  |  |  |
Realized Investment Gains (Losses) |  | 18,000,000 |  | (193,000,000) |  | 198,000,000 |  |
Mortgage Loans on Real Estate [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) Table [Abstract] |  |  |  |  |  |  |  |
Valuation Allowances and Reserves, Adjustments |  | 5,000,000 |  | 4,000,000 |  | 1,000,000 |  |
Retirement Plans and Individual Life Businesses [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) Table [Abstract] |  |  |  |  |  |  |  |
Gain (Loss) on Investments, Excluding Other than Temporary Impairments |  | 1,500,000,000 |  |  |  | 1,500,000,000 |  |
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member] |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) Table [Abstract] |  |  |  |  |  |  |  |
Gain (Loss) on Investments, Excluding Other than Temporary Impairments |  | (32,000,000) |  | 217,000,000 |  | 1,515,000,000 | [6] |
Equity Securities [Member] |  |  |  |  |  |  |  |
Sale of Available-for-sale Securities [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds |  | 1,319,000,000 |  | 354,000,000 |  | 274,000,000 |  |
Available-for-sale Securities, Gross Realized Gains |  | 61,000,000 |  | 22,000,000 |  | 96,000,000 |  |
Available-for-sale Securities, Gross Realized Losses |  | (46,000,000) |  | (20,000,000) |  | (20,000,000) |  |
Debt Securities [Member] |  |  |  |  |  |  |  |
Sale of Available-for-sale Securities [Abstract] |  |  |  |  |  |  |  |
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds |  | 20,615,000,000 |  | 22,923,000,000 |  | 39,225,000,000 |  |
Available-for-sale Securities, Gross Realized Gains |  | 372,000,000 |  | 456,000,000 |  | 2,143,000,000 | [7] |
Available-for-sale Securities, Gross Realized Losses |  | (317,000,000) |  | (182,000,000) |  | (654,000,000) |  |
Retirement Plans and Individual Life Businesses [Member] |  |  |  |  |  |  |  |
Investment Income [Line Items] |  |  |  |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal |  |  |  |  |  | 71 |  |
GMWB Product Derivatives [Member] | UNITED STATES |  |  |  |  |  |  |  |
Investment Income [Line Items] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  |  |  |  |  | 1,306,000,000 |  |
Three Win Related Foreign Currency Swaps [Member] | JAPAN |  |  |  |  |  |  |  |
Net Realized Capital Gains (Losses) Table [Abstract] |  |  |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Hedged Item in Foreign Currency Fair Value Hedge |  | 4,000,000 |  | 116,000,000 |  | 250,000,000 |  |
Macro Hedge Program [Member] | UNITED STATES |  |  |  |  |  |  |  |
Investment Income [Line Items] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  |  |  |  |  | (234,000,000) |  |
Not Designated as Hedging Instrument [Member] | GMWB Product Derivatives [Member] | UNITED STATES |  |  |  |  |  |  |  |
Investment Income [Line Items] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | (59,000,000) |  | (2,000,000) |  |  |  |
Not Designated as Hedging Instrument [Member] | Fixed Annuity Hedging Instruments [Member] | JAPAN |  |  |  |  |  |  |  |
Investment Income [Line Items] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net | [8] | (21,000,000) |  | (148,000,000) |  | (268,000,000) |  |
Not Designated as Hedging Instrument [Member] | Variable Annuity [Member] | UNITED STATES |  |  |  |  |  |  |  |
Investment Income [Line Items] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | (133,000,000) |  | (6,000,000) |  | 28,000,000 |  |
Not Designated as Hedging Instrument [Member] | GMWB Derivatives, Net [Member] | UNITED STATES |  |  |  |  |  |  |  |
Investment Income [Line Items] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | (87,000,000) |  | 5,000,000 |  | 262,000,000 |  |
Not Designated as Hedging Instrument [Member] | Macro Hedge Program [Member] | UNITED STATES |  |  |  |  |  |  |  |
Investment Income [Line Items] |  |  |  |  |  |  |  |
Derivative, Gain (Loss) on Derivative, Net |  | $ (46,000,000) |  | $ (11,000,000) |  | $ (234,000,000) |  |
[1] | [3]Excludes investments that contain an embedded credit derivative for which the Company has elected the fair value option. For further discussion, see the Fair Value Option section in Note 4 - Fair Value Measurements.
[2] | Includes net investment income on short-term investments.
[3] | [1]Includes net investment income on short-term investments
[4] | Includes income from derivatives that hedge fixed maturities and qualify for hedge accounting.
[5] | [2]Includes income from derivatives that hedge fixed maturities and qualify for hedge accounting.
[6] | The December 31, 2013 amount includes $1.5 billion of net unrealized gains on securities relating to the sales of the Retirement Plans and Individual Life businesses.
[7] | Includes $1.5 billion of gross gains related to the sale of the Individual Life and Retirement Plans businesses for the year ended December 31, 2013.
[8] | The associated liability is adjusted for changes in spot rates through realized capital gains and was $4, $116 and $250 for the years ended December 31, 2015, 2014 and 2013, respectively

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