Realized (Gain) Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Details underlying realized gain (loss)
Total Realized Gain Loss Related To Certain Investments	$ (54)	$ (45)	$ (153)	$ (92)
Realized gain (loss) on the mark-to-market on certain instruments	59	(105)	99	(95)
Indexed annuity net derivative results
Gross gain (loss)	(5)	(4)	14	3
Associated amortization of DAC, VOBA, DSI, and DFEL	0	1	(6)	(2)
Variable annuity net derivatives results
Gross gain (loss)	92	(12)	107	33
Associated amortization of DAC, VOBA, DSI, and DFEL	(22)	2	(33)	(17)
Realized gain (loss)	$ 70	$ (163)	$ 28	$ (170)