Fair Value Measurements Level 4 Fair Value by Hierarchy (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014	Sep. 30, 2013
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	$ 60,555		$ 59,384
Fixed maturities, FVO	520		488
Trading Securities, Equity	11		11
Available-for-sale Securities, Equity Securities	1,148		1,047
Short-term investments	3,651		4,883
Alternative Investments, Fair Value Disclosure	2,923		2,942
Reinsurance recoverable for U.S. GMWB	22,737		22,920
Separate account assets	135,803		134,702
Assets, Fair Value Disclosure	198,246		199,248
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities accounted for at fair value on a recurring basis	(1,085)		(1,095)
Derivative Liability, Fair Value, Amount Offset Against Collateral	144		137
Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(202)
Credit derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	9		8
Credit derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(6)
Commodity Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	7
Commodity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	3
Equity derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	2		3
Equity derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	32
Foreign exchange derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	9
Foreign exchange derivative [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	130		129
Interest Rate Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(531)
Other Derivatives Contracts [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	11		12
Derivative Financial Instruments, Assets [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	445	[1]	364	[1]
Derivative Financial Instruments, Liabilities [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative Liability, Fair Value, Amount Offset Against Collateral	389		413
Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(880)	[2]	(927)	[2]
Embedded Derivative Financial Instruments [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(3)	[3]	(3)
ABS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	3,004		2,472
Collateralized Debt Obligations [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	2,982	[4]	2,841	[4]
CMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	4,652		4,415
Corporate [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	27,119		27,359
Foreign Government Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	1,365		1,636
Municipal [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	12,842		12,871
RMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	4,078		3,918
U.S. Treasuries [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	4,513		3,872
Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	444		106
Fixed maturities, FVO	0		0
Trading Securities, Equity	11		11
Available-for-sale Securities, Equity Securities	910		786
Short-term investments	313		349
Assets, Fair Value Disclosure	91,549		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 Investments [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 derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	0		0
Level 1 [Member] | Equity derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	0
Level 1 [Member] | Foreign exchange derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	0
Level 1 [Member] | Foreign exchange derivative [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 Derivatives Contracts [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	[2]	0
Level 1 [Member] | Embedded Derivative Financial Instruments [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	0	[3]	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	444		106
Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	56,411		55,803
Fixed maturities, FVO	435		396
Trading Securities, Equity	0		0
Available-for-sale Securities, Equity Securities	136		163
Short-term investments	3,338		4,534
Assets, Fair Value Disclosure	101,703		101,735
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities accounted for at fair value on a recurring basis	(966)		(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	1
Level 2 [Member] | Commodity Contract [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	7
Level 2 [Member] | Commodity Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	3
Level 2 [Member] | Equity derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	0		0
Level 2 [Member] | Equity derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	26
Level 2 [Member] | Foreign exchange derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	9
Level 2 [Member] | Foreign exchange derivative [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	119		113
Level 2 [Member] | Interest Rate Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(502)
Level 2 [Member] | Other Derivatives Contracts [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	195	[1]	128	[1]
Level 2 [Member] | Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(966)	[2]	(1,004)
Level 2 [Member] | Embedded Derivative Financial Instruments [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	0	[3]	0
Level 2 [Member] | ABS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	2,843		2,350
Level 2 [Member] | Collateralized Debt Obligations [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	2,398		2,218
Level 2 [Member] | CMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	4,384		4,131
Level 2 [Member] | Corporate [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	26,007		26,319
Level 2 [Member] | Foreign Government Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	1,317		1,577
Level 2 [Member] | Municipal [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	12,778		12,805
Level 2 [Member] | RMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	2,615		2,637
Level 2 [Member] | U.S. Treasuries [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	4,069		3,766
Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	3,700		3,475
Fixed maturities, FVO	85		92
Trading Securities, Equity	0		0
Available-for-sale Securities, Equity Securities	102		98
Short-term investments	0		0
Assets, Fair Value Disclosure	4,994		4,724
Liabilities, Fair Value Disclosure [Abstract]
Total liabilities accounted for at fair value on a recurring basis	(119)		(91)
Level 3 [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(202)
Level 3 [Member] | Credit derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(4)		(2)
Level 3 [Member] | Credit derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(7)
Level 3 [Member] | Commodity Contract [Member] | Other Investments [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	0
Level 3 [Member] | Equity derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	2		3
Level 3 [Member] | Equity derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	6
Level 3 [Member] | Foreign exchange derivative [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	0
Level 3 [Member] | Foreign exchange derivative [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	11		16
Level 3 [Member] | Interest Rate Contract [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(29)
Level 3 [Member] | Other Derivatives Contracts [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	11		12
Level 3 [Member] | Derivative Financial Instruments, Assets [Member] | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	250	[1]	236	[1]
Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	86	[2]	77
Level 3 [Member] | Embedded Derivative Financial Instruments [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(3)	[3]	(3)
Level 3 [Member] | ABS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	161		122
Level 3 [Member] | Collateralized Debt Obligations [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	584		623
Level 3 [Member] | CMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	268		284
Level 3 [Member] | Corporate [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	1,112		1,040
Level 3 [Member] | Foreign Government Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	48		59
Level 3 [Member] | Municipal [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	64		66
Level 3 [Member] | RMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	1,463		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 derivative [Member] | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net			28
Fair Value, Measurements, Recurring [Member] | Foreign exchange derivative [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 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] | Foreign exchange 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] | 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 derivative [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 derivative [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	190		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 derivative [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 derivative [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	268		284
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | RMBS [Member]
Assets, Fair Value Disclosure [Abstract]
Total fixed maturities	1,463		1,281
UNITED STATES | Guaranteed Minimum Withdrawal Benefit [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(176)
UNITED STATES | Level 1 [Member] | Guaranteed Minimum Withdrawal Benefit [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	0
UNITED STATES | Level 2 [Member] | Guaranteed Minimum Withdrawal Benefit [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	0
UNITED STATES | Level 3 [Member] | Guaranteed Minimum Withdrawal Benefit [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	(176)
UNITED STATES | Fair Value, Measurements, Recurring [Member] | Guaranteed Minimum Withdrawal Benefit [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net			(139)
UNITED STATES | Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Guaranteed Minimum Withdrawal Benefit [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net			0
UNITED STATES | Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Guaranteed Minimum Withdrawal Benefit [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net			0
UNITED STATES | Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Guaranteed Minimum Withdrawal Benefit [Member] | Other policyholder funds and benefits payable [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net			(139)
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	106
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	1,300
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	0					0
US GMWB Hedging Instruments [Member] | UNITED STATES | Other Investments [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	142		119
US GMWB Hedging Instruments [Member] | UNITED STATES | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	39		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	47		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	(25)		(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	95		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	64		56
Equity Linked Notes [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] | 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	(26)
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	65		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	65		56
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Assets, Fair Value Disclosure [Abstract]
Reinsurance recoverable for U.S. GMWB	22		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	22		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	135		93
Macro Hedge Program [Member] | UNITED STATES | Other liabilities [Member]
Assets, Fair Value Disclosure [Abstract]
Derivative Assets (Liabilities), at Fair Value, Net	52		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	135		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	52		48
Portion at Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Alternative Investments, Fair Value Disclosure	742	[5]	770	[5]
Separate account assets	131,087	[6]	132,211	[6]
Portion at Fair Value Measurement [Member] | Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Alternative Investments, Fair Value Disclosure	0	[5]	0	[5]
Separate account assets	89,871	[6]	91,537	[6]
Portion at Fair Value Measurement [Member] | Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Alternative Investments, Fair Value Disclosure	552	[5]	581	[5]
Separate account assets	40,614	[6]	40,096	[6]
Portion at Fair Value Measurement [Member] | Level 3 [Member]
Assets, Fair Value Disclosure [Abstract]
Alternative Investments, Fair Value Disclosure	190	[5]	189	[5]
Separate account assets	602	[6]	578	[6]
Portion at Other than Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Separate account assets	$ 4,700	[6]	$ 2,500	[6]

[1] 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 March 31, 2015 and December 31, 2014, $389 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 4 for derivative liabilities.

[2] Includes OTC and OTC-cleared derivative instruments in a net negative fair market 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.

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

[4] Gross unrealized gains (losses) exclude the fair value of bifurcated, embedded derivative features of certain securities. Subsequent changes in value are recorded in net realized capital gains (losses).

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

[6] Approximately $4.7 billion and $2.5 billion of investment sales receivable, as of March 31, 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.