Derivatives (Primary Risks Managed by Derivatives) (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 98,877	$ 90,931
Derivative assets	3,227	3,312
Derivative liabilities	8,011	10,140
Embedded Derivative, Fair Value of Embedded Derivative Asset	132	186
Embedded Derivative, Fair Value of Embedded Derivative Liability	4,577	8,496
Derivatives Designated as Hedging Instruments:
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	4,063	3,462
Derivative assets	541	259
Derivative liabilities	17	22
Derivatives Designated as Hedging Instruments: | Cash flow hedges: | Interest rate forwards
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	120	180
Derivative assets	0	30
Derivative liabilities	11	0
Derivatives Designated as Hedging Instruments: | Cash flow hedges: | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,943	3,282
Derivative assets	541	229
Derivative liabilities	6	22
Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	94,814	87,469
Derivative assets	2,554	2,867
Derivative liabilities	3,417	1,622
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	3,295	2,595
Derivative assets	198	325
Derivative liabilities	0	17
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	120	29
Derivative liabilities	27	4
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate options
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	16,413	8,050
Derivative assets	64	83
Derivative liabilities	33	0
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest rate forwards
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	12,095	9,808
Derivative assets	19	627
Derivative liabilities	1,684	109
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Foreign currency swaps
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	868	967
Derivative assets	148	96
Derivative liabilities	0	21
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Foreign currency forwards
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	480	483
Derivative assets	8	3
Derivative liabilities	0	4
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Credit default swaps — written
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	1,923	1,724
Derivative assets	7	39
Derivative liabilities	7	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	25,701	24,692
Derivative assets	731	1,155
Derivative liabilities	834	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	25,258	32,719
Derivative assets	1,235	493
Derivative liabilities	829	588
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Hybrid options
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	900	900
Derivative assets	0	8
Derivative liabilities	0	0
Derivatives Not Designated or Not Qualifying as Hedging Instruments: | Interest Rate Floor
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	2,250	0
Derivative assets	15	0
Derivative liabilities	2	0
Ceded guaranteed minimum income benefits
Derivatives, Fair Value [Line Items]
Embedded Derivative, Fair Value of Embedded Derivative Asset	132	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	1,746	6,211
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	2,527	1,848
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	$ 304	$ 437