Investments (Realized Gain (Loss) Related To Certain Investments) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Realized gain (loss) related to certain investments
Gain (loss) on other investments		$ (3)		$ (63)	$ (8)
Associated amortization expense of DAC, VOBA, DSI and DFEL and changes in other contract holder funds		(5)	$ (10)	(8)	(15)
Total realized gain (loss) related to certain investments	[1]	(65)	(1)	(172)	(28)
Fixed maturity AFS securities [Member]
Realized gain (loss) related to certain investments
AFS securities. Gross gains	[2]	7	21	61	23
AFS securities. Gross losses	[2]	(65)	(13)	(163)	(29)
Equity AFS securities [Member]
Realized gain (loss) related to certain investments
AFS securities. Gross gains		2	1	2	1
AFS securities. Gross losses		$ (1)		$ (1)

[1] See "Realized Gain (Loss) Related to Certain Investments" section in Note 4.

[2] These amounts are represented net of related fair value hedging activity. See Note 5 for more information.