Derivative Financial Instruments (Details 13) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Derivative Instruments, Gain (Loss) [Line Items]
Net derivatives gains (losses)	$ (2,308)	$ 83	$ (1,759)	$ (1,594)
Net derivatives gains (losses) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net derivatives gains (losses)	(2,308)	83	(1,759)	(1,594)
Policyholder benefits and claims [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net derivatives gains (losses)	$ 113	$ 0	$ 105	$ 46