Derivative Instruments (Gains (Losses) On Derivative Instruments Recorded Within Income (Loss) From Continuing Operations) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Gains (losses)
Gains (losses)		$ (549)	$ (784)	$ (540)
Designated as Hedging Instrument [Member] | Cash flow hedges
Gains (losses)
Gains (losses)		14	15	(22)
Designated as Hedging Instrument [Member] | Fair value hedges
Gains (losses)
Gains (losses)		20	(196)	35
Designated as Hedging Instrument [Member] | Net Investment Income [Member] | Cash flow hedges | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[1]	5	8	(22)
Designated as Hedging Instrument [Member] | Net Investment Income [Member] | Cash flow hedges | Foreign currency contracts [Member]
Gains (losses)
Gains (losses)	[1]	11	6
Designated as Hedging Instrument [Member] | Net Investment Income [Member] | Fair value hedges | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[1]	(28)	(30)
Designated as Hedging Instrument [Member] | Interest and Debt Expense [Member] | Cash flow hedges | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[2]	(10)	1
Designated as Hedging Instrument [Member] | Interest and Debt Expense [Member] | Fair value hedges | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[2]	32	32	35
Designated as Hedging Instrument [Member] | Realized Gain (Loss) [Member] | Cash flow hedges | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[3]	1
Designated as Hedging Instrument [Member] | Realized Gain (Loss) [Member] | Cash flow hedges | Foreign currency contracts [Member]
Gains (losses)
Gains (losses)	[3]	7
Designated as Hedging Instrument [Member] | Realized Gain (Loss) [Member] | Fair value hedges | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[3]	16	(198)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments | Realized Gain (Loss) [Member] | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[3]	181	304	1,303
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments | Realized Gain (Loss) [Member] | Foreign currency contracts [Member]
Gains (losses)
Gains (losses)	[3]	(14)	(11)	(8)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments | Realized Gain (Loss) [Member] | Equity market contracts [Member]
Gains (losses)
Gains (losses)	[3]	(1,253)	(118)	(215)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments | Realized Gain (Loss) [Member] | Credit contracts [Member]
Gains (losses)
Gains (losses)	[3]	(5)	(6)	(1)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments | Realized Gain (Loss) [Member] | Embedded derivatives - GLB reserves [Member]
Gains (losses)
Gains (losses)	[3]	582	(779)	(1,391)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments | Realized Gain (Loss) [Member] | Embedded derivatives - Reinsurance related [Member]
Gains (losses)
Gains (losses)	[3]	34	63	(42)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments | Realized Gain (Loss) [Member] | Indexed annuity and IUL contracts embedded derivatives [Member]
Gains (losses)
Gains (losses)	[3]	(120)	(57)	(210)
Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments | Commissions and other expenses [Member] | Equity market contracts [Member]
Gains (losses)
Gains (losses)	[4]	$ 12	$ 1	$ 11

[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).