Derivative Instruments - Gains and Losses, and Change in Fair Value of Derivatives (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	$ (3,037)	$ (134)
Derivatives excluding funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	(2,658)	(1,436)
Derivatives related to funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	(379)	1,302
Cross-currency swaps | Derivatives excluding funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	(26)	(32)
Cross-currency swaps | Derivatives related to funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	1	3
Equity index call options | Derivatives excluding funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	(164)	(589)
Equity index futures | Derivatives excluding funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	(1,885)	623
Equity index put options | Derivatives excluding funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	(762)	(315)
Interest rate swaps | Derivatives excluding funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	66	(261)
Interest rate swaps - cleared | Derivatives excluding funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	16	(88)
Put-swaptions | Derivatives excluding funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	573	(468)
Interest rate futures | Derivatives excluding funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	(306)	(310)
Total return swaps | Freestanding derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	(61)	0
Fixed index annuity embedded derivatives | Derivatives excluding funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	(2)	1
RILA embedded derivatives | Derivatives excluding funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	(107)	3
Cross-currency forwards | Derivatives related to funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	(10)	18
Funds withheld embedded derivative | Derivatives related to funds withheld under reinsurance treaties
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on derivative instruments	$ (370)	$ 1,281