Derivatives Instruments Level 4 Derivative Balance Sheet Classification (Details) - USD ($) $ in Millions	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	$ 1,400		$ 1,100
Derivative, Notional Amount	59,177		62,185
Derivative, Fair Value, Net	(1,026)		(926)
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement	1,420		1,095
Derivative Asset, Fair Value, Gross Asset	1,290		933
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	1,024		756
Derivative, Collateral, Obligation to Return Cash	12		176
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement	(2,446)		(2,021)
Derivative Asset, Fair Value of Collateral	209		100
Derivative Asset, Fair Value, Amount Offset Against Collateral	57		77
Derivative Liability, Fair Value, Gross Liability	(2,067)		(1,730)
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	1,049		818
Derivative, Collateral, Right to Reclaim Cash	37		114
Derivative Liability, Fair Value of Collateral	974		889
Derivative Liability, Fair Value, Amount Offset Against Collateral	44		23
Other Policyholder Funds and Benefits Payable [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	13,653		15,149
Derivative, Fair Value, Net	(379)		(288)
Derivative Asset, Fair Value, Gross Asset	0		0
Derivative Liability, Fair Value, Gross Liability	(379)		(288)
Reinsurance Recoverable [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,729		4,000
Derivative, Fair Value, Net	129		162
Derivative Asset, Fair Value, Gross Asset	129		162
Derivative Liability, Fair Value, Gross Liability	0		0
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	30,902		19,358
Derivative, Fair Value, Net	(1,055)		(798)
Derivative Asset, Fair Value, Gross Asset	940		524
Derivative Liability, Fair Value, Gross Liability	(1,995)		(1,322)
Other Investments [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	10,477		23,253
Derivative, Fair Value, Net	278		1
Derivative Asset, Fair Value, Gross Asset	350		409
Derivative Liability, Fair Value, Gross Liability	(72)		(408)
Fixed Maturities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	416		425
Derivative, Fair Value, Net	1		(3)
Derivative Asset, Fair Value, Gross Asset	1		0
Derivative Liability, Fair Value, Gross Liability	0		(3)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	55,529		58,492
Derivative, Fair Value, Net	(1,083)		(924)
Derivative Asset, Fair Value, Gross Asset	1,328		1,038
Derivative Liability, Fair Value, Gross Liability	(2,411)		(1,962)
Derivative Financial Instruments, Liabilities [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	(1,055)		(798)
Derivative Financial Instruments, Assets [Member] \| Other Investments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	278		1
Foreign Exchange Contract [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	(257)
Foreign Exchange Contract [Member] \| Other Investments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	2		15
Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	(17)
Interest Rate Contract [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	(961)
Interest Rate Contract [Member] \| Other Investments [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	104		(227)
Interest Rate Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	12,816		14,290
Derivative, Fair Value, Net	(931)		(814)
Derivative Asset, Fair Value, Gross Asset	590		297
Derivative Liability, Fair Value, Gross Liability	(1,521)		(1,111)
Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,625		3,670
Derivative, Fair Value, Net	57		(2)
Derivative Asset, Fair Value, Gross Asset	92		57
Derivative Liability, Fair Value, Gross Liability	(35)		(59)
Currency Swap [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	1,090		653
Derivative, Fair Value, Net	9		17
Derivative Asset, Fair Value, Gross Asset	15		17
Derivative Liability, Fair Value, Gross Liability	(6)		0
Credit Default Swap, Buying Protection [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	185		423
Derivative, Fair Value, Net	(5)		18
Derivative Asset, Fair Value, Gross Asset	0		22
Derivative Liability, Fair Value, Gross Liability	(5)		(4)
Credit Default Swap, Selling Protection [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	1,828		2,458
Derivative, Fair Value, Net	4		(13)
Derivative Asset, Fair Value, Gross Asset	15		9
Derivative Liability, Fair Value, Gross Liability	(11)		(22)
Credit Derivatives in Offsetting Positions [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,797		4,059
Derivative, Fair Value, Net	0		(2)
Derivative Asset, Fair Value, Gross Asset	43		40
Derivative Liability, Fair Value, Gross Liability	(43)		(42)
Equity Contract [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Assets (Liabilities), at Fair Value, Net	30
Equity Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	105		419
Derivative, Fair Value, Net	(1)		15
Derivative Asset, Fair Value, Gross Asset	30		41
Derivative Liability, Fair Value, Gross Liability	(31)		(26)
GMWB Product Derivatives [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	13,603		15,099
Derivative, Fair Value, Net	(348)		(262)
Derivative Asset, Fair Value, Gross Asset	0		0
Derivative Liability, Fair Value, Gross Liability	(348)		(262)
GMWB Reinsurance [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,809		3,106
Derivative, Fair Value, Net	98		83
Derivative Asset, Fair Value, Gross Asset	98		83
Derivative Liability, Fair Value, Gross Liability	0		0
GMWB Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	10,464		10,979
Derivative, Fair Value, Net	169		158
GMWB Hedging Instruments [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	10,464		10,979
Derivative, Fair Value, Net	169		158
Derivative Asset, Fair Value, Gross Asset	307		264
Derivative Liability, Fair Value, Gross Liability	(138)		(106)
Macro Hedge Program [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	6,348		4,548
Derivative, Fair Value, Net	136		147
Derivative Asset, Fair Value, Gross Asset	197		179
Derivative Liability, Fair Value, Gross Liability	(61)		(32)
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	31		79
Derivative Asset, Fair Value, Gross Asset	31		79
Derivative Liability, Fair Value, Gross Liability	0		0
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	921		895
Fair Value Hedging [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	23		23
Derivative, Fair Value, Net	0		0
Derivative Asset, Fair Value, Gross Asset	0		0
Derivative Liability, Fair Value, Gross Liability	0		0
Cash Flow Hedging [Member] \| Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	182		143
Derivative, Fair Value, Net			(19)
Derivative Asset, Fair Value, Gross Asset	8		7
Derivative Liability, Fair Value, Gross Liability	(25)		(26)
Cash Flow Hedging [Member] \| Interest Rate Contract [Member] \| Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,443		3,527
Derivative, Fair Value, Net	74		17
Derivative Asset, Fair Value, Gross Asset	84		50
Derivative Liability, Fair Value, Gross Liability	(10)		(33)
JAPAN \| Three Win Related Foreign Currency Swaps [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	1,063		1,063
Derivative, Fair Value, Net	(247)		(357)
Derivative Asset, Fair Value, Gross Asset	0		0
Derivative Liability, Fair Value, Gross Liability	$ (247)		(357)
Put Option [Member] \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount		$ 500	500
Derivative, Fair Value, Net		2	7
Derivative Asset, Fair Value, Gross Asset		2	7
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 of liability associated with 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, and obligation to return cash collateral under master netting arrangements.

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Fair value of securities received as collateral against derivative assets.

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Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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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, after effects of master netting arrangements, of 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 offset against an obligation to return collateral. Includes assets not subject to a master netting arrangement and not elected to be offset.

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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