Investments (Realized Gain (Loss) Related To Certain Investments) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Realized gain (loss) related to certain investments
Gain (loss) on other investments		$ (4)		$ (67)	$ (7)
Associated amortization expense of DAC, VOBA, DSI and DFEL and changes in other contract holder funds		(7)	$ (5)	(15)	(21)
Total realized gain (loss) related to certain investments	[1]	(42)	(26)	(213)	(51)
Fixed maturity AFS securities [Member]
Realized gain (loss) related to certain investments
AFS securities. Gross gains	[2]	2	1	64	26
AFS securities. Gross losses	[2]	(37)	(23)	(200)	(51)
Equity AFS securities [Member]
Realized gain (loss) related to certain investments
AFS securities. Gross gains		4	1	6	2
AFS securities. Gross losses				$ (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.