Derivative Instruments (Outstanding Derivative Instruments With Off-Balance-Sheet Risks) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	$ 184,321	$ 216,826
Asset Fair Value	10,293	6,390
Liability Fair Value	9,505	7,091
Interest Rate Contracts [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	87,165
Foreign currency contracts [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,466
Equity market contracts [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	92,641
Credit contracts [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	49
GLB Ceded Embedded Derivatives [Member] \| Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Asset Fair Value	56	82
Liability Fair Value	182
Cash Flow Hedges [Member] \| Designated as Hedging Instrument [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	7,201	5,266
Asset Fair Value	381	234
Liability Fair Value	487	714
Derivative Investments [Member] \| Interest Rate Contracts [Member] \| Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	82,786	135,434
Asset Fair Value	897	1,587
Liability Fair Value	176	159
Derivative Investments [Member] \| Foreign currency contracts [Member] \| Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	487	304
Asset Fair Value	7	1
Liability Fair Value	2	8
Derivative Investments [Member] \| Equity market contracts [Member] \| Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	92,641	74,610
Asset Fair Value	6,461	3,486
Liability Fair Value	2,108	1,952
Derivative Investments [Member] \| Credit contracts [Member] \| Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	49	51
Derivative Investments [Member] \| Cash Flow Hedges [Member] \| Interest Rate Contracts [Member] \| Designated as Hedging Instrument [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	3,222	2,177
Asset Fair Value	98	87
Liability Fair Value	436	563
Derivative Investments [Member] \| Cash Flow Hedges [Member] \| Foreign currency contracts [Member] \| Designated as Hedging Instrument [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	3,979	3,089
Asset Fair Value	283	147
Liability Fair Value	51	151
Derivative Investments [Member] \| Fair Value Hedges [Member] \| Interest Rate Contracts [Member] \| Designated as Hedging Instrument [Member]
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,157	1,161
Liability Fair Value	213	272
Other Assets [Member] \| GLB Direct Embedded Derivatives [Member] \| Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Asset Fair Value	1,963	450
Reinsurance Related Embedded Derivatives [Member] \| Reinsurance Related [Member] \| Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Liability Fair Value	206	392
Future Contract Benefits [Member] \| Indexed Annuity And IUL Contracts [Member] \| Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]
Outstanding derivative instruments with off-balance-sheet risks
Asset Fair Value	528	550
Liability Fair Value	$ 6,131	$ 3,594

Derivative Investments [Member] | Interest Rate Contracts [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]

Derivative Investments [Member] | Foreign currency contracts [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]

Derivative Investments [Member] | Equity market contracts [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]

Derivative Investments [Member] | Credit contracts [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]

Derivative Investments [Member] | Cash Flow Hedges [Member] | Interest Rate Contracts [Member] | Designated as Hedging Instrument [Member]

Derivative Investments [Member] | Cash Flow Hedges [Member] | Foreign currency contracts [Member] | Designated as Hedging Instrument [Member]

Derivative Investments [Member] | Fair Value Hedges [Member] | Interest Rate Contracts [Member] | Designated as Hedging Instrument [Member]

Other Assets [Member] | GLB Direct Embedded Derivatives [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]

Reinsurance Related Embedded Derivatives [Member] | Reinsurance Related [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]

Future Contract Benefits [Member] | Indexed Annuity And IUL Contracts [Member] | Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments [Member]