Investments (Realized Gain (Loss) Related To Certain Investments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Realized gain (loss) related to certain investments
Gain (loss) on other investments	$ (2)		$ (10)		$ (3)		$ (8)
Associated amortization expense of DAC, VOBA, DSI and DFEL and changes in other contract holder funds	(8)		1		(19)		3
Total realized gain (loss) related to certain investments	(33)	[1]	(54)	[1]	(73)	[1]	(153)	[1]
Fixed Maturity Securities [Member]
Realized gain (loss) related to certain investments
AFS securities. Gross gains	5		4		17		12
AFS securities. Gross losses	(28)		(49)		(73)		(161)
Equity AFS Securities [Member]
Realized gain (loss) related to certain investments
AFS securities. Gross gains	1				7		1
AFS securities. Gross losses	$ (1)				$ (2)

[1] See “Realized Gain (Loss) Related to Certain Investments” section in Note 5.