Realized (Gain) Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Details underlying realized gain (loss)
Total Realized Gain Loss Related To Certain Investments	$ (51)	$ (32)	$ (99)	$ (47)
Realized gain (loss) on the mark-to-market on certain instruments	(19)	(1)	39	9
Indexed annuity net derivative results
Gross gain (loss)	(3)	1	19	7
Associated amortization of DAC, VOBA, DSI, and DFEL	1	0	(5)	(2)
Variable annuity net derivatives results
Gross gain (loss)	148	34	14	44
Associated amortization of DAC, VOBA, DSI, and DFEL	(33)	(11)	(11)	(18)
Realized gain (loss)	$ 43	$ (9)	$ (43)	$ (7)