Investments and Derivative Instruments (Details 15) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Derivative [Line Items]
Net Derivatives, Notional Amount	$ 134,480	$ 136,854
Net Derivatives, Fair Value	(164)	(547)
Asset Derivatives, Fair Value	5,240	2,775
Liability Derivatives, Fair Value	(5,404)	(3,322)
Fixed maturities, AFS [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	703	728
Net Derivatives, Fair Value	(83)	(39)
Asset Derivatives, Fair Value	0	0
Liability Derivatives, Fair Value	(83)	(39)
Other Investments [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	64,059	55,948
Net Derivatives, Fair Value	2,800	1,524
Asset Derivatives, Fair Value	3,889	2,105
Liability Derivatives, Fair Value	(1,089)	(581)
Other liabilities [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	23,542	28,333
Net Derivatives, Fair Value	(498)	(654)
Asset Derivatives, Fair Value	866	387
Liability Derivatives, Fair Value	(1,364)	(1,041)
Consumer Notes [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	39	39
Net Derivatives, Fair Value	(4)	(5)
Asset Derivatives, Fair Value	0	0
Liability Derivatives, Fair Value	(4)	(5)
Reinsurance Recoverables [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	7,519	8,767
Net Derivatives, Fair Value	485	280
Asset Derivatives, Fair Value	485	280
Liability Derivatives, Fair Value	0	0
Other policyholder funds and benefits payable [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	38,618	43,039
Net Derivatives, Fair Value	(2,864)	(1,653)
Asset Derivatives, Fair Value	0	3
Liability Derivatives, Fair Value	$ (2,864)	$ (1,656)