Investments and Derivative Instruments Level 4 Derivative Balance Sheet Classification (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	$ 72,850,000,000invest_DerivativeNotionalAmount	$ 159,441,000,000invest_DerivativeNotionalAmount
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	1,100,000,000	1,300,000,000
Derivative, Fair Value, Net	(639,000,000)	(737,000,000)
Derivative Asset, Fair Value, Gross Asset	1,175,000,000	1,845,000,000
Derivative Liability, Fair Value, Gross Liability	1,741,000,000	2,626,000,000
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	1,267,000,000	1,948,000,000
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	1,906,000,000	2,685,000,000
Fixed Maturities [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	454,000,000	473,000,000
Derivative, Fair Value, Net	2,000,000	(2,000,000)
Derivative Asset, Fair Value, Gross Asset	2,000,000	1,000,000
Derivative Liability, Fair Value, Gross Liability	0	3,000,000
Other Investments [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	23,014,000,000	53,219,000,000
Derivative, Fair Value, Net	364,000,000	442,000,000
Derivative Asset, Fair Value, Gross Asset	624,000,000	909,000,000
Derivative Liability, Fair Value, Gross Liability	260,000,000	467,000,000
Other Liabilities [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	26,791,000,000	78,064,000,000
Derivative, Fair Value, Net	(930,000,000)	(1,225,000,000)
Derivative Asset, Fair Value, Gross Asset	551,000,000	936,000,000
Derivative Liability, Fair Value, Gross Liability	1,481,000,000	2,161,000,000
Reinsurance Recoverables [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	4,633,000,000	5,758,000,000
Derivative, Fair Value, Net	90,000,000	96,000,000
Derivative Asset, Fair Value, Gross Asset	90,000,000	96,000,000
Derivative Liability, Fair Value, Gross Liability	0	0
Other Policyholder Funds and Benefits Payable [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	17,958,000,000	21,927,000,000
Derivative, Fair Value, Net	(165,000,000)	(48,000,000)
Derivative Asset, Fair Value, Gross Asset	0	6,000,000
Derivative Liability, Fair Value, Gross Liability	165,000,000	54,000,000
Interest Rate Swap [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	13,100,000,000	6,900,000,000
Cash Flow Hedging Interest Rate Swaps [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	3,999,000,000	5,026,000,000
Derivative, Fair Value, Net	44,000,000	(92,000,000)
Derivative Asset, Fair Value, Gross Asset	52,000,000	50,000,000
Derivative Liability, Fair Value, Gross Liability	8,000,000	142,000,000
Cash Flow Hedges Foreign Currency Swaps [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	143,000,000	143,000,000
Derivative, Fair Value, Net	(19,000,000)	(5,000,000)
Derivative Asset, Fair Value, Gross Asset	3,000,000	2,000,000
Derivative Liability, Fair Value, Gross Liability	22,000,000	7,000,000
Cash Flow Hedging [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	4,142,000,000	5,169,000,000
Derivative, Fair Value, Net	25,000,000	(97,000,000)
Derivative Asset, Fair Value, Gross Asset	55,000,000	52,000,000
Derivative Liability, Fair Value, Gross Liability	30,000,000	149,000,000
Fair Value Hedging Interest Rate Swaps [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	32,000,000	1,799,000,000
Derivative, Fair Value, Net	0	(24,000,000)
Derivative Asset, Fair Value, Gross Asset	0	3,000,000
Derivative Liability, Fair Value, Gross Liability	0	27,000,000
Fair Value Hedging [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	32,000,000	1,799,000,000
Derivative, Fair Value, Net	0	(24,000,000)
Derivative Asset, Fair Value, Gross Asset	0	3,000,000
Derivative Liability, Fair Value, Gross Liability	0	27,000,000
Interest Rate Swaps Caps Floors and Futures [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	15,254,000,000	8,453,000,000
Derivative, Fair Value, Net	(512,000,000)	(487,000,000)
Derivative Asset, Fair Value, Gross Asset	536,000,000	171,000,000
Derivative Liability, Fair Value, Gross Liability	1,048,000,000	658,000,000
Foreign Currency Swaps and Forwards Non-qualifying as Hedges [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	177,000,000	258,000,000
Derivative, Fair Value, Net	1,000,000	(9,000,000)
Derivative Asset, Fair Value, Gross Asset	3,000,000	6,000,000
Derivative Liability, Fair Value, Gross Liability	2,000,000	15,000,000
Credit Derivatives that Purchase Credit Protection [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	595,000,000	938,000,000
Derivative, Fair Value, Net	(6,000,000)	(15,000,000)
Derivative Asset, Fair Value, Gross Asset	4,000,000	1,000,000
Derivative Liability, Fair Value, Gross Liability	10,000,000	16,000,000
Credit Derivatives that Assume Credit Risk [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	1,487,000,000	1,886,000,000
Derivative, Fair Value, Net	3,000,000	33,000,000
Derivative Asset, Fair Value, Gross Asset	14,000,000	36,000,000
Derivative Liability, Fair Value, Gross Liability	11,000,000	3,000,000
Credit Derivatives in Offsetting Positions [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	5,343,000,000	7,764,000,000
Derivative, Fair Value, Net	(3,000,000)	(7,000,000)
Derivative Asset, Fair Value, Gross Asset	53,000,000	76,000,000
Derivative Liability, Fair Value, Gross Liability	56,000,000	83,000,000
Equity Index Swaps Options [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	635,000,000	358,000,000
Derivative, Fair Value, Net	2,000,000	(1,000,000)
Derivative Asset, Fair Value, Gross Asset	31,000,000	19,000,000
Derivative Liability, Fair Value, Gross Liability	29,000,000	20,000,000
International Program Product Derivatives [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	0	366,000,000
Derivative, Fair Value, Net	0	6,000,000
Derivative Asset, Fair Value, Gross Asset	0	6,000,000
Derivative Liability, Fair Value, Gross Liability	0	0
International Program Hedging Instruments [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	0	73,048,000,000
Derivative, Fair Value, Net	0	(33,000,000)
Derivative Asset, Fair Value, Gross Asset	0	866,000,000
Derivative Liability, Fair Value, Gross Liability	0	899,000,000
Contingent Capital Facility Put Option [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	500,000,000	500,000,000
Derivative, Fair Value, Net	12,000,000	17,000,000
Derivative Asset, Fair Value, Gross Asset	12,000,000	17,000,000
Derivative Liability, Fair Value, Gross Liability	0	0
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	974,000,000	1,250,000,000
Derivative, Fair Value, Net	34,000,000	67,000,000
Derivative Asset, Fair Value, Gross Asset	34,000,000	67,000,000
Derivative Liability, Fair Value, Gross Liability	0	0
Non-qualifying Strategies [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	68,676,000,000	152,473,000,000
Derivative, Fair Value, Net	(664,000,000)	(616,000,000)
Derivative Asset, Fair Value, Gross Asset	1,212,000,000	1,893,000,000
Derivative Liability, Fair Value, Gross Liability	1,876,000,000	2,509,000,000
JAPAN \| Three Win Related Foreign Currency Swaps [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	1,319,000,000	1,571,000,000
Derivative, Fair Value, Net	(427,000,000)	(354,000,000)
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	427,000,000	354,000,000
JAPAN \| Fixed Annuity Hedging Instruments [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	0	1,436,000,000
Derivative, Fair Value, Net	0	(6,000,000)
Derivative Asset, Fair Value, Gross Asset	0	88,000,000
Derivative Liability, Fair Value, Gross Liability	0	94,000,000
UNITED STATES \| GMWB Hedging Instruments [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	14,442,000,000	18,691,000,000
Derivative, Fair Value, Net	174,000,000	41,000,000
Derivative Asset, Fair Value, Gross Asset	289,000,000	333,000,000
Derivative Liability, Fair Value, Gross Liability	115,000,000	292,000,000
UNITED STATES \| Macro Hedge Program [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	6,383,000,000	9,934,000,000
Derivative, Fair Value, Net	141,000,000	139,000,000
Derivative Asset, Fair Value, Gross Asset	180,000,000	178,000,000
Derivative Liability, Fair Value, Gross Liability	39,000,000	39,000,000
UNITED STATES \| GMWB Product Derivatives [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	17,908,000,000	21,512,000,000
Derivative, Fair Value, Net	(139,000,000)	(36,000,000)
Derivative Asset, Fair Value, Gross Asset	0	0
Derivative Liability, Fair Value, Gross Liability	139,000,000	36,000,000
UNITED STATES \| GMWB Reinsurance [Member]
Derivative Balance Sheet Location [Line Items]
Derivative, Notional Amount	3,659,000,000	4,508,000,000
Derivative, Fair Value, Net	56,000,000	29,000,000
Derivative Asset, Fair Value, Gross Asset	56,000,000	29,000,000
Derivative Liability, Fair Value, Gross Liability	$ 0	$ 0

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and elected not to be offset.

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