Investments and Derivative Instruments (Details 15) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative [Line Items]
Net Derivatives, Notional Amount	$ 183,278	$ 205,854
Net Derivatives, Fair Value	1,551	1,448
Asset Derivatives, Fair Value	2,213	4,489
Liability Derivatives, Fair Value	(3,764)	(5,937)
Fixed maturities, AFS [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	192	416
Net Derivatives, Fair Value	2	20
Asset Derivatives, Fair Value	0	0
Liability Derivatives, Fair Value	(2)	(20)
Other Investments [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	47,590	37,809
Net Derivatives, Fair Value	(277)	(581)
Asset Derivatives, Fair Value	773	1,049
Liability Derivatives, Fair Value	(496)	(468)
Other liabilities [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	54,500	67,765
Net Derivatives, Fair Value	723	(38)
Asset Derivatives, Fair Value	730	1,683
Liability Derivatives, Fair Value	(1,453)	(1,645)
Consumer Notes [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	9	26
Net Derivatives, Fair Value	1	2
Asset Derivatives, Fair Value	0	0
Liability Derivatives, Fair Value	(1)	(2)
Reinsurance Recoverables [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	40,213	47,430
Net Derivatives, Fair Value	36	(1,081)
Asset Derivatives, Fair Value	710	1,757
Liability Derivatives, Fair Value	(746)	(676)
Other policyholder funds and benefits payable [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	40,774	52,408
Net Derivatives, Fair Value	1,066	3,126
Asset Derivatives, Fair Value	0	0
Liability Derivatives, Fair Value	$ (1,066)	$ (3,126)