Fair Value Measurements Level 4 Fair Value by Hierarchy (Details) - USD ($) $ in Millions		Sep. 30, 2015		Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount		$ 0					$ 0
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		59,109		$ 59,384
Fixed maturities, FVO		548		488
Trading Securities, Equity		11		11	[1]
Available-for-sale Securities, Equity Securities		813		1,047
Short-term investments		3,433		4,883
Alternative Investments, Fair Value Disclosure		3,067		2,942
Reinsurance recoverable for U.S. GMWB		23,087		22,920
Separate account assets		121,634		134,702
Assets, Fair Value Disclosure		182,893		199,248
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities accounted for at fair value on a recurring basis		(1,214)		(1,095)
Derivative Liability, Fair Value, Amount Offset Against Collateral		24		137
Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(291)
Credit derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		13		8
Credit derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(29)
Commodity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		7
Equity Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				3
Equity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		20
Foreign Exchange Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		10
Foreign Exchange Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(469)
Interest Rate Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		79		129
Interest Rate Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(648)
Other Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		8		12
Derivative Financial Instruments, Assets [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	[1]	304		364	[2]
Derivative Financial Instruments, Liabilities [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability, Fair Value, Amount Offset Against Collateral		136		413
Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	[3]	(923)		(927)	[4]
Embedded Derivative Financial Instruments [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	[5]			(3)
ABS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		2,716		2,472
Collateralized Debt Obligations [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	[6]	3,031		2,841
CMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		4,542		4,415
Corporate [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		26,772		27,359
Foreign Government Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		1,255		1,636
Municipal [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		12,211		12,871
RMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		3,859		3,918
U.S. Treasuries [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		4,723		3,872
Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		934		106
Fixed maturities, FVO		1		0
Trading Securities, Equity		11		11	[1]
Available-for-sale Securities, Equity Securities		565		786
Short-term investments		700		349
Assets, Fair Value Disclosure		79,579		92,789
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities accounted for at fair value on a recurring basis		0		0
Level 1 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 1 [Member] | Credit derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0		0
Level 1 [Member] | Credit derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 1 [Member] | Commodity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 1 [Member] | Equity Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Level 1 [Member] | Equity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 1 [Member] | Foreign Exchange Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 1 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 1 [Member] | Interest Rate Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0		0
Level 1 [Member] | Interest Rate Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 1 [Member] | Other Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0		0
Level 1 [Member] | Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0	[3]	0	[4]
Level 1 [Member] | Embedded Derivative Financial Instruments [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	[5]			0
Level 1 [Member] | ABS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		0		0
Level 1 [Member] | Collateralized Debt Obligations [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		0		0
Level 1 [Member] | CMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		0		0
Level 1 [Member] | Corporate [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		0		0
Level 1 [Member] | Foreign Government Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		0		0
Level 1 [Member] | Municipal [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		0		0
Level 1 [Member] | RMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		0		0
Level 1 [Member] | U.S. Treasuries [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		934		106
Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		54,937		55,803
Fixed maturities, FVO		486		396
Trading Securities, Equity		0		0	[1]
Available-for-sale Securities, Equity Securities		149		163
Short-term investments		2,733		4,534
Assets, Fair Value Disclosure		99,032		101,735
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities accounted for at fair value on a recurring basis		(1,069)		(1,004)
Level 2 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 2 [Member] | Credit derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		13		10
Level 2 [Member] | Credit derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(29)
Level 2 [Member] | Commodity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 2 [Member] | Equity Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Level 2 [Member] | Equity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		20
Level 2 [Member] | Foreign Exchange Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		10
Level 2 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(469)
Level 2 [Member] | Interest Rate Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		69		113
Level 2 [Member] | Interest Rate Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(618)
Level 2 [Member] | Other Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0		0
Level 2 [Member] | Derivative Financial Instruments, Assets [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		101	[1]	128	[2]
Level 2 [Member] | Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(1,069)	[3]	(1,004)	[4]
Level 2 [Member] | Embedded Derivative Financial Instruments [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	[5]			0
Level 2 [Member] | ABS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		2,689		2,350
Level 2 [Member] | Collateralized Debt Obligations [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		2,486		2,218
Level 2 [Member] | CMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		4,373		4,131
Level 2 [Member] | Corporate [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		25,867		26,319
Level 2 [Member] | Foreign Government Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		1,205		1,577
Level 2 [Member] | Municipal [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		12,161		12,805
Level 2 [Member] | RMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		2,367		2,637
Level 2 [Member] | U.S. Treasuries [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		3,789		3,766
Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		3,238		3,475
Fixed maturities, FVO		61		92
Trading Securities, Equity		0		0	[1]
Available-for-sale Securities, Equity Securities		99		98
Short-term investments		0		0
Assets, Fair Value Disclosure		4,282		4,724
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities accounted for at fair value on a recurring basis		(145)		(91)
Level 3 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(291)
Level 3 [Member] | Credit derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0		(2)
Level 3 [Member] | Credit derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 3 [Member] | Commodity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		7
Level 3 [Member] | Equity Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				3
Level 3 [Member] | Equity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 3 [Member] | Foreign Exchange Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 3 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Level 3 [Member] | Interest Rate Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		10		16
Level 3 [Member] | Interest Rate Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(30)
Level 3 [Member] | Other Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		8		12
Level 3 [Member] | Derivative Financial Instruments, Assets [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		203	[1]	236	[2]
Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		146	[3]	77	[4]
Level 3 [Member] | Embedded Derivative Financial Instruments [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	[5]			(3)
Level 3 [Member] | ABS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		27		122
Level 3 [Member] | Collateralized Debt Obligations [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		545		623
Level 3 [Member] | CMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		169		284
Level 3 [Member] | Corporate [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		905		1,040
Level 3 [Member] | Foreign Government Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		50		59
Level 3 [Member] | Municipal [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		50		66
Level 3 [Member] | RMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		1,492		1,281
Level 3 [Member] | U.S. Treasuries [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		0		0
Fair Value, Measurements, Recurring [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(165)
Fair Value, Measurements, Recurring [Member] | Credit derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(16)
Fair Value, Measurements, Recurring [Member] | Equity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				28
Fair Value, Measurements, Recurring [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(445)
Fair Value, Measurements, Recurring [Member] | Interest Rate Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(597)
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Credit derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Equity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Interest Rate Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Credit derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(9)
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Equity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				25
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(445)
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Interest Rate Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(574)
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Alternative Investments, Fair Value Disclosure		98		189
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(165)
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Credit derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(7)
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Equity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				3
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Foreign Exchange Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Interest Rate Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(23)
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | CMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		169		284
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | RMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities		1,492		1,281
Interim Period [Member] | U.S. Treasuries [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount		471					278
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount		0				$ 0
Annual Period [Member] | U.S. Treasuries [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount		995					$ 1,900
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount		0				$ 0
US GMWB Hedging Instruments [Member] | Level 3 [Member] | Other Contract [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		171		124
US GMWB Hedging Instruments [Member] | UNITED STATES | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		94		119
US GMWB Hedging Instruments [Member] | UNITED STATES | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		113		55
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 1 [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0		0
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 1 [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0		0
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 2 [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		9		5
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 2 [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		27		(1)
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 3 [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		85		114
US GMWB Hedging Instruments [Member] | UNITED STATES | Level 3 [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		86		56
Equity Linked Notes [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(21)
Equity Linked Notes [Member] | Level 1 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Equity Linked Notes [Member] | Level 2 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Equity Linked Notes [Member] | Level 3 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(21)
Equity Linked Notes [Member] | Fair Value, Measurements, Recurring [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(26)
Equity Linked Notes [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Equity Linked Notes [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Equity Linked Notes [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(26)
GMWB Reinsurance [Member]
Assets, Fair Value Disclosure [Abstract]
Reinsurance recoverable for U.S. GMWB		73		56
GMWB Reinsurance [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Reinsurance recoverable for U.S. GMWB		0		0
GMWB Reinsurance [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Reinsurance recoverable for U.S. GMWB		0		0
GMWB Reinsurance [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Reinsurance recoverable for U.S. GMWB		73		56
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Assets, Fair Value Disclosure [Abstract]
Reinsurance recoverable for U.S. GMWB		62		34
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Reinsurance recoverable for U.S. GMWB		0		0
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Reinsurance recoverable for U.S. GMWB		62		34
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Reinsurance recoverable for U.S. GMWB		0		0
Macro Hedge Program [Member] | UNITED STATES | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		100		93
Macro Hedge Program [Member] | UNITED STATES | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		83		48
Macro Hedge Program [Member] | UNITED STATES | Level 1 [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0		0
Macro Hedge Program [Member] | UNITED STATES | Level 1 [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0		0
Macro Hedge Program [Member] | UNITED STATES | Level 2 [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0		0
Macro Hedge Program [Member] | UNITED STATES | Level 2 [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0		0
Macro Hedge Program [Member] | UNITED STATES | Level 3 [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		100		93
Macro Hedge Program [Member] | UNITED STATES | Level 3 [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		83		48
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(270)
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Level 1 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Level 2 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		0
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Level 3 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net		(270)
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Fair Value, Measurements, Recurring [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(139)
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				0
Guaranteed Minimum Withdrawal Benefit [Member] | UNITED STATES | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net				(139)
Portion at Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Alternative Investments, Fair Value Disclosure		815	[2]	770	[7]
Separate account assets		117,725	[7]	132,211	[3]
Portion at Fair Value Measurement [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Alternative Investments, Fair Value Disclosure		0	[2]	0	[7]
Separate account assets		77,368	[7]	91,537	[3]
Portion at Fair Value Measurement [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Alternative Investments, Fair Value Disclosure		717	[2]	581	[7]
Separate account assets		39,847	[7]	40,096	[3]
Portion at Fair Value Measurement [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Alternative Investments, Fair Value Disclosure		98	[2]	189	[7]
Separate account assets		510	[7]	578	[3]
Portion at Other than Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Separate account assets	[7]	$ 3,900		$ 2,500

[1] [1]Included in other investments on the Condensed Consolidated Balance Sheets.

[2] [2]Includes over-the-counter ("OTC") and OTC-cleared derivative instruments in a net positive fair value position after consideration of the accrued interest and impact of collateral posting requirements, which may be imposed by agreements, clearing house rules and applicable law. As of September 30, 2015, and December 31, 2014, $136 and $413, respectively, of cash collateral liability was netted against the derivative asset value in the Condensed Consolidated Balance Sheets and is excluded from the preceding table. See the following footnote 5 for derivative liabilities.

[3] [4]Approximately $3.9 billion and $2.5 billion of investment sales receivable, as of September 30, 2015, and December 31, 2014, respectively, are excluded from this disclosure requirement because they are trade receivables in the ordinary course of business where the carrying amount approximates fair value.

[4] [5]Includes OTC and OTC-cleared derivative instruments in a net negative fair value position (derivative liability) after consideration of the accrued interest and impact of collateral posting requirements, which may be imposed by agreements, clearing house rules and applicable law. In the following Level 3 roll-forward table in this Note 4, the derivative assets and liabilities are referred to as “freestanding derivatives” and are presented on a net basis.

[5] [6]Represents embedded derivatives associated with non-funding agreement-backed consumer equity linked notes.

[6] Gross unrealized gains (losses) exclude the fair value of bifurcated embedded derivatives within certain securities. Subsequent changes in value are recorded in net realized capital gains (losses).

[7] [3]Represents hedge funds where investment company accounting has been applied to a wholly-owned fund of funds measured at fair value.