Investments and Derivative Instruments (Details 15) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Derivative [Line Items]
Net Derivatives, Notional Amount	$ 126,446	$ 136,854
Net Derivatives, Fair Value	(404)	(547)
Asset Derivatives, Fair Value	2,726	2,775
Liability Derivatives, Fair Value	(3,130)	(3,322)
Fixed maturities, AFS [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	703	728
Net Derivatives, Fair Value	(43)	(39)
Asset Derivatives, Fair Value	0	0
Liability Derivatives, Fair Value	(43)	(39)
Other investments [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	27,523	55,948
Net Derivatives, Fair Value	890	1,524
Asset Derivatives, Fair Value	1,223	2,105
Liability Derivatives, Fair Value	(333)	(581)
Other liabilities [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	50,410	28,333
Net Derivatives, Fair Value	(24)	(654)
Asset Derivatives, Fair Value	1,266	387
Liability Derivatives, Fair Value	(1,290)	(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	7,886	8,767
Net Derivatives, Fair Value	237	280
Asset Derivatives, Fair Value	237	280
Liability Derivatives, Fair Value	0	0
Other policyholder funds and benefits payable [Member]
Derivative [Line Items]
Net Derivatives, Notional Amount	39,885	43,039
Net Derivatives, Fair Value	(1,460)	(1,653)
Asset Derivatives, Fair Value	0	3
Liability Derivatives, Fair Value	$ (1,460)	$ (1,656)