Derivative Instruments (Gains (Losses) On Derivative Instruments Recorded Within Income (Loss) From Continuing Operations) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Gains (losses)
Gains (losses)		$ (96)	$ (259)	$ (165)	$ (640)
Designated as Hedging Instrument [Member] | Cash flow hedges
Gains (losses)
Gains (losses)			2	7	9
Designated as Hedging Instrument [Member] | Fair value hedges
Gains (losses)
Gains (losses)		(8)	(31)	2	(85)
Designated as Hedging Instrument [Member] | Net Investment Income [Member] | Cash flow hedges | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[1]	1	3	2	4
Designated as Hedging Instrument [Member] | Net Investment Income [Member] | Cash flow hedges | Foreign currency contracts [Member]
Gains (losses)
Gains (losses)	[1]	4	1	9	3
Designated as Hedging Instrument [Member] | Net Investment Income [Member] | Fair value hedges | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[1]	(6)	(7)	(13)	(15)
Designated as Hedging Instrument [Member] | Interest and Debt Expense [Member] | Cash flow hedges | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[2]	(5)	(2)	(9)	(2)
Designated as Hedging Instrument [Member] | Interest and Debt Expense [Member] | Fair value hedges | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[2]	7	8	15	16
Designated as Hedging Instrument [Member] | Realized Gain (Loss) [Member] | Cash flow hedges | Foreign currency contracts [Member]
Gains (losses)
Gains (losses)	[3]			5	4
Designated as Hedging Instrument [Member] | Realized Gain (Loss) [Member] | Fair value hedges | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[3]	(9)	(32)		(86)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] | Realized Gain (Loss) [Member] | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[3]	193	614	143	1,590
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] | Realized Gain (Loss) [Member] | Foreign currency contracts [Member]
Gains (losses)
Gains (losses)	[3]	(2)	(7)	1	(3)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] | Realized Gain (Loss) [Member] | Equity market contracts [Member]
Gains (losses)
Gains (losses)	[3]	(289)	(252)	(817)	(582)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] | Realized Gain (Loss) [Member] | Credit contracts [Member]
Gains (losses)
Gains (losses)	[3]		(4)		(7)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] | Realized Gain (Loss) [Member] | Embedded derivatives - GLB [Member]
Gains (losses)
Gains (losses)	[3]	72	(542)	669	(1,505)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] | Realized Gain (Loss) [Member] | Embedded derivatives - Reinsurance related [Member]
Gains (losses)
Gains (losses)	[3]	(3)	(23)		(47)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] | Realized Gain (Loss) [Member] | Indexed annuity and IUL contracts embedded derivatives [Member]
Gains (losses)
Gains (losses)	[3]	(64)	(19)	(184)	(12)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member] | Commissions and other expenses [Member] | Equity market contracts [Member]
Gains (losses)
Gains (losses)	[4]	$ 5	$ 3	$ 14	$ 2

[1] Reported in net investment income on our Consolidated Statements of Comprehensive Income (Loss).

[2] Reported in interest and debt expense on our Consolidated Statements of Comprehensive Income (Loss).

[3] Reported in realized gain (loss) on our Consolidated Statements of Comprehensive Income (Loss).

[4] Reported in commissions and other expenses on our Consolidated Statements of Comprehensive Income (Loss).