Derivatives (Derivatives Pertaining to Hedged Items) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses)	$ (3,920)	$ (585)	$ (3,986)
Net Derivative Gains (Losses) Recognized for Hedged Items	(6)	(27)	(1)
Net investment income	4,560	4,064	4,815
Amount of Gains (Losses) Deferred in AOCI	(273)	329	170
Derivatives Not Designated or Not Qualifying as Hedging Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Net Derivative Gains (Losses) Recognized for Hedged Items	2	(16)	2
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	(8)	(11)	(3)
Amount of Gains (Losses) Deferred in AOCI	(273)	329	170
Net Derivative Gains (Losses) Recognized for Derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses)	(3,914)	(558)	(3,985)
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)	(3,922)	(575)	(3,994)
Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses)	8	17	9
Net Investment Income
Derivative Instruments, Gain (Loss) [Line Items]
Net investment income	54	56	37
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	54	56	37
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	(1)	(50)	(20)
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)	(384)	(4,001)	(717)
Interest rate | Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses)	1	5	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	3	4	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	2	(16)	2
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	(8)	(11)	(3)
Amount of Gains (Losses) Deferred in AOCI	(272)	379	190
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)	(40)	95	48
Foreign currency exchange rate | Net Derivative Gains (Losses) Recognized for Derivatives | Cash flow hedges:
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains (losses)	7	12	7
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	51	52	34
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)	32	(2)	17
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)	570	590	(486)
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)	(4,100)	2,743	(2,856)
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