Derivatives (Primary Risks Managed by Derivatives) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 116,742	$ 90,680
Derivative assets	2,388	3,298
Derivative liabilities	9,499	10,444
Embedded Derivative, Fair Value of Embedded Derivative Asset	117	186
Embedded Derivative, Fair Value of Embedded Derivative Liability	5,588	8,800
Derivatives Designated as Hedging Instruments:
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	4,041	3,417
Derivative assets	584	250
Derivative liabilities	20	22
Derivatives Designated as Hedging Instruments: | Cash flow hedges: | Interest rate forwards
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	60	180
Derivative assets	0	30
Derivative liabilities	12	0
Derivatives Designated as Hedging Instruments: | Cash flow hedges: | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,981	3,237
Derivative assets	584	220
Derivative liabilities	8	22
Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	112,701	87,263
Derivative assets	1,687	2,862
Derivative liabilities	3,891	1,622
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,145	2,595
Derivative assets	98	325
Derivative liabilities	46	17
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate floors
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,250	0
Derivative assets	12	0
Derivative liabilities	3	0
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate caps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	6,350	5,100
Derivative assets	137	29
Derivative liabilities	43	4
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate options
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	28,688	8,050
Derivative assets	22	83
Derivative liabilities	232	0
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate forwards
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	18,168	9,808
Derivative assets	35	627
Derivative liabilities	2,466	109
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	810	956
Derivative assets	147	94
Derivative liabilities	0	21
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	295	288
Derivative assets	1	0
Derivative liabilities	1	4
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Credit default swaps — written
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	1,757	1,724
Derivative assets	18	39
Derivative liabilities	2	1
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Credit default swaptions
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	100	150
Derivative assets	0	0
Derivative liabilities	0	0
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Equity index options
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	17,229	24,692
Derivative assets	697	1,155
Derivative liabilities	351	877
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Equity variance swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	0	281
Derivative assets	0	9
Derivative liabilities	0	1
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Equity total return swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	32,909	32,719
Derivative assets	520	493
Derivative liabilities	747	588
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Hybrid options
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	0	900
Derivative assets	0	8
Derivative liabilities	0	0
Ceded guaranteed minimum income benefits
Derivatives, Fair Value [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative Asset	117	186
Embedded Derivative, Fair Value of Embedded Derivative Liability	0	0
Direct guaranteed minimum benefits
Derivatives, Fair Value [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative Asset	0	0
Embedded Derivative, Fair Value of Embedded Derivative Liability	1,371	1,725
Assumed guaranteed minimum benefits
Derivatives, Fair Value [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative Asset	0	0
Embedded Derivative, Fair Value of Embedded Derivative Liability	285	427
Direct index-linked annuities
Derivatives, Fair Value [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative Asset	0	0
Embedded Derivative, Fair Value of Embedded Derivative Liability	3,564	6,211
Direct index-linked annuities | Assumed index-linked annuities
Derivatives, Fair Value [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative Asset	0	0
Embedded Derivative, Fair Value of Embedded Derivative Liability	$ 368	$ 437