Derivatives (Primary Risks Managed by Derivatives) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 105,521	$ 90,680
Derivative assets	3,852	3,298
Derivative liabilities	8,989	10,444
Embedded Derivative, Fair Value of Embedded Derivative Asset	129	186
Embedded Derivative, Fair Value of Embedded Derivative Liability	4,277	8,800
Derivatives Designated as Hedging Instruments:
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	4,094	3,417
Derivative assets	870	250
Derivative liabilities	25	22
Derivatives Designated as Hedging Instruments: | Cash flow hedges: | Interest rate forwards
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	90	180
Derivative assets	0	30
Derivative liabilities	17	0
Derivatives Designated as Hedging Instruments: | Cash flow hedges: | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	4,004	3,237
Derivative assets	870	220
Derivative liabilities	8	22
Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	101,427	87,263
Derivative assets	2,853	2,862
Derivative liabilities	4,687	1,622
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,900	2,595
Derivative assets	156	325
Derivative liabilities	54	17
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate floors
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,250	0
Derivative assets	7	0
Derivative liabilities	2	0
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate caps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	5,350	5,100
Derivative assets	182	29
Derivative liabilities	5	4
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate options
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	20,438	8,050
Derivative assets	41	83
Derivative liabilities	189	0
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate forwards
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	15,969	9,808
Derivative assets	33	627
Derivative liabilities	2,550	109
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	825	956
Derivative assets	207	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	423	288
Derivative assets	0	0
Derivative liabilities	6	4
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Credit default swaps — written
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	1,869	1,724
Derivative assets	7	39
Derivative liabilities	11	1
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Credit default swaptions
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	0	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	17,053	24,692
Derivative assets	696	1,155
Derivative liabilities	350	877
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Equity variance swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	281	281
Derivative assets	9	9
Derivative liabilities	1	1
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Equity total return swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	33,069	32,719
Derivative assets	1,515	493
Derivative liabilities	1,519	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	129	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	1,622	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	313	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	2,034	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	$ 308	$ 437