Derivative Instruments (Gains (Losses) On Derivative Instruments Recorded Within Income (Loss) From Continuing Operations) (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
		Sep. 30, 2018	Sep. 30, 2018
Gains (losses)
Gains (losses)		$ (470)	$ (710)
Qualifying Hedges [Member] | Cash Flow Hedges [Member]
Gains (losses)
Gains (losses)		8	21
Qualifying Hedges [Member] | Fair Value Hedges [Member]
Gains (losses)
Gains (losses)		15	53
Qualifying Hedges [Member] | Net Investment Income [Member] | Cash Flow Hedges [Member] | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[1]	1	3
Qualifying Hedges [Member] | Net Investment Income [Member] | Cash Flow Hedges [Member] | Foreign currency contracts [Member]
Gains (losses)
Gains (losses)	[1]	7	18
Qualifying Hedges [Member] | Net Investment Income [Member] | Fair Value Hedges [Member] | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[1]	(2)	(11)
Qualifying Hedges [Member] | Realized Gain (Loss) [Member] | Fair Value Hedges [Member] | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[2]	17	64
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[2]	(167)	(577)
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | Foreign currency contracts [Member]
Gains (losses)
Gains (losses)	[2]		2
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | Equity market contracts [Member]
Gains (losses)
Gains (losses)	[2]	(199)	(280)
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | GLB Embedded Derivative [Member]
Gains (losses)
Gains (losses)	[2]	2	2
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | Embedded derivatives - Reinsurance related [Member]
Gains (losses)
Gains (losses)	[2]	26	234
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | Indexed Annuity And IUL Contracts [Member]
Gains (losses)
Gains (losses)	[2]	(164)	(175)
Non-Qualifying Hedging [Member] | Commissions And Other Expenses [Member] | Equity market contracts [Member]
Gains (losses)
Gains (losses)	[3]	$ 9	$ 10

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

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

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