Investments and Derivative Instruments (Details 18) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Total	$ (2)		$ (146)		$ (1,155)		$ (890)
Interest rate swaps, swap options , caps, floors and forwards [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	2		(4)		(6)		(6)
Foreign currency swaps and forwards [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	(1)		(1)		4		12
Japan 3Win Related Foreign Currency Swaps [Member] | JAPAN
Derivative Instruments, Gain (Loss) [Line Items]
Total	0	[1]	15	[1]	(184)	[1]	(106)	[1]
Fixed annuity hedging instruments [Member] | JAPAN
Derivative Instruments, Gain (Loss) [Line Items]
Total	6	[2]	24	[2]	(150)	[2]	(46)	[2]
Credit Derivatives that Purchase Credit Protection [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	(1)		4		(10)		(15)
Credit Derivatives that Assume Credit Risk [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	12		61		32		194
Equity index swaps and options [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	(5)		(9)		(21)		(22)
GMWB product derivatives [Member] | U.S. [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	451		823		1,099		1,235
GMWB Reinsurance [Member] | U.S. [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	(74)		(184)		(166)		(265)
GMWB hedging instruments [Member] | U.S. [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	(174)		(258)		(714)		(519)
Macro Hedge Program [Member] | U.S. [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	(50)		(109)		(182)		(292)
International program hedging instruments [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	(72)		(122)		(671)		(483)
GMAB, GMWB, and GMIB Reinsurance Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	226		348		837		599
Coinsurance and Modified Coinsurance Reinsurance Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total	$ (322)		$ (734)		$ (1,023)		$ (1,176)

[1] The associated liability is adjusted for changes in spot rates through realized capital gains and was $(16) and $(46) for the three months ended September 30, 2013 and 2012, respectively

[2] The associated liability is adjusted for changes in spot rates through realized capital gains and was $(19) and $(54) for the three months ended September 30, 2013 and 2012, respectively, and $222 and $33 for the nine months ended September 30, 2013 and 2012, respectively.