Derivative Instruments (Outstanding Derivative Instruments With Off-Balance-Sheet Risks) (Details) - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		$ 153,436
Interest rate contracts [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[1]	110,417
Foreign currency contracts [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[2]	3,047
Equity market contracts [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		39,972
Total Derivative Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		153,436	$ 135,355
Asset Fair Value		4,561	2,625
Liability Fair Value		4,374	1,986
Derivative investments [Member] | Interest rate contracts [Member] | Non-Qualifying Hedging [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	108,732	100,628
Asset Fair Value	[3]	1,330	464
Liability Fair Value	[3]	319	138
Derivative investments [Member] | Foreign currency contracts [Member] | Non-Qualifying Hedging [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	333	47
Asset Fair Value	[3]	4
Liability Fair Value	[3]	1
Derivative investments [Member] | Equity market contracts [Member] | Non-Qualifying Hedging [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	39,972	30,273
Asset Fair Value	[3]	976	676
Liability Fair Value	[3]	372	162
Derivative investments [Member] | Cash Flow Hedges [Member] | Qualifying Hedges [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts		3,853	3,854
Asset Fair Value		516	200
Liability Fair Value		34	48
Derivative investments [Member] | Cash Flow Hedges [Member] | Interest rate contracts [Member] | Qualifying Hedges [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	1,139	1,528
Asset Fair Value	[3]	196	33
Liability Fair Value	[3]	2	9
Derivative investments [Member] | Cash Flow Hedges [Member] | Foreign currency contracts [Member] | Qualifying Hedges [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	2,714	2,326
Asset Fair Value	[3]	320	167
Liability Fair Value	[3]	32	39
Derivative investments [Member] | Fair Value Hedges [Member] | Interest rate contracts [Member] | Qualifying Hedges [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	[3]	546	553
Liability Fair Value	[3]	239	137
Other Assets [Member] | GLB Direct Embedded Derivatives [Member] | Non-Qualifying Hedging [Member]
Outstanding derivative instruments with off-balance-sheet risks
Asset Fair Value	[4],[5]		123
Liability Fair Value	[4],[5]	846
Other Liabilities [Member] | GLB Ceded Embedded Derivatives [Member] | Non-Qualifying Hedging [Member]
Outstanding derivative instruments with off-balance-sheet risks
Asset Fair Value	[4],[5]	844	72
Liability Fair Value	[4],[5]		196
Reinsurance Related Embedded Derivatives [Member] | Embedded derivatives - Reinsurance related [Member] | Non-Qualifying Hedging [Member]
Outstanding derivative instruments with off-balance-sheet risks
Asset Fair Value	[6]		188
Liability Fair Value	[6]	465
Future Contract Benefits [Member] | Indexed Annuity And IUL Contracts [Member] | Non-Qualifying Hedging [Member]
Outstanding derivative instruments with off-balance-sheet risks
Asset Fair Value	[4],[7]	891	902
Liability Fair Value	[4],[7]	$ 2,098	$ 1,305

[1] As of September 30, 2019, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was June 23, 2021.

[2] June 23, 2021.⁽²⁾As of September 30, 2019, the latest maturity date for which we were hedging our exposure to the variability in future cash flows for these instruments was February 20, 2050.

[3] Reported in derivative investments and other liabilities on our Consolidated Balance Sheets.

[4] Reported in other assets on our Consolidated Balance Sheets.

[5] Reported in other liabilities on our Consolidated Balance Sheets.

[6] Reported in reinsurance related embedded derivatives on our Consolidated Balance Sheets.

[7] Reported in future contract benefits on our Consolidated Balance Sheets.