Derivative Instruments (Gains (Losses) On Derivative Instruments Recorded Within Income (Loss) From Continuing Operations) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Gains (losses)
Gains (losses)		$ 710	$ (1,821)
Qualifying Hedges [Member] | Cash Flow Hedges [Member]
Gains (losses)
Gains (losses)		31	31
Qualifying Hedges [Member] | Fair Value Hedges [Member]
Gains (losses)
Gains (losses)		23	(16)
Qualifying Hedges [Member] | Net Investment Income [Member] | Cash Flow Hedges [Member] | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[1]	4	4
Qualifying Hedges [Member] | Net Investment Income [Member] | Cash Flow Hedges [Member] | Foreign currency contracts [Member]
Gains (losses)
Gains (losses)	[1]	27	18
Qualifying Hedges [Member] | Net Investment Income [Member] | Fair Value Hedges [Member] | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[1]	(14)	(23)
Qualifying Hedges [Member] | Realized Gain (Loss) [Member] | Cash Flow Hedges [Member] | Foreign currency contracts [Member]
Gains (losses)
Gains (losses)	[2]		9
Qualifying Hedges [Member] | Realized Gain (Loss) [Member] | Fair Value Hedges [Member] | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[2]	37	7
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | Interest rate contracts [Member]
Gains (losses)
Gains (losses)	[2]	(149)	103
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | Foreign currency contracts [Member]
Gains (losses)
Gains (losses)	[2]	5
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | Equity market contracts [Member]
Gains (losses)
Gains (losses)	[2]	445	(1,427)
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | GLB Embedded Derivative [Member]
Gains (losses)
Gains (losses)	[2]	(1)
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | Embedded derivatives - Reinsurance related [Member]
Gains (losses)
Gains (losses)	[2]	292	(141)
Non-Qualifying Hedging [Member] | Realized Gain (Loss) [Member] | Indexed Annuity And IUL Contracts [Member]
Gains (losses)
Gains (losses)	[2]	81	(400)
Non-Qualifying Hedging [Member] | Commissions And Other Expenses [Member] | Equity market contracts [Member]
Gains (losses)
Gains (losses)	[3]	$ (17)	28
Non-Qualifying Hedging [Member] | Commissions And Other Expenses [Member] | Credit contracts [Member]
Gains (losses)
Gains (losses)	[3]		$ 1

[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).