Derivatives (Derivatives Pertaining to Hedged Items) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	$ 402	$ (2,359)	$ (132)
Net Derivative Gains (Losses) Recognized for Hedged Items	(27)	(1)	(13)
Net Investment Income	4,064	4,815	3,528
Amount of Gains (Losses) Deferred in AOCI	329	170	(52)
Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	(16)	2	(7)
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	(11)	(3)	(6)
Amount of Gains (Losses) Deferred in AOCI	329	170	(52)
Net Derivative Gains (Losses) Recognized for Derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	429	(2,358)	(119)
Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	412	(2,367)	(134)
Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	17	9	15
Net Investment Income
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Income	56	37	39
Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Income	0	0	0
Net Investment Income | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Income	56	37	39
Interest rate | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	0	0
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Interest rate | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	0	0
Amount of Gains (Losses) Deferred in AOCI	(50)	(20)	77
Interest rate | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	(4,001)	(717)	3,557
Interest rate | Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	5	2	2
Interest rate | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Income	0	0	0
Interest rate | Net Investment Income | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Income	4	3	3
Foreign currency exchange rate | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	(16)	2	(7)
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Foreign currency exchange rate | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	(11)	(3)	(6)
Amount of Gains (Losses) Deferred in AOCI	379	190	(129)
Foreign currency exchange rate | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	95	48	(17)
Foreign currency exchange rate | Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	12	7	13
Foreign currency exchange rate | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Income	0	0	0
Foreign currency exchange rate | Net Investment Income | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Income	52	34	36
Credit | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	0	0
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Credit | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	(2)	17	18
Credit | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Income	0	0	0
Equity market | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	0	0
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Equity market | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	590	(486)	(1,367)
Equity market | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Income	0	0	0
Embedded | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	0	0	0
Amount of Gains (Losses) Deferred in AOCI	0	0	0
Embedded | Net Derivative Gains (Losses) Recognized for Derivatives | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Derivatives	3,730	(1,229)	(2,325)
Embedded | Net Investment Income | Derivatives Not Designated or Not Qualifying as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Income	$ 0	$ 0	$ 0