Long-duration Contracts - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Additional Liability, Long-Duration Insurance [Line Items]
Future policy benefit, interest expense			$ 924	$ 751
Favorable (unfavorable) movements			(2,572)	8,047
Interest accrual			936	751
Benefit payments			(2,287)	(1,748)
Effect of changes in discount rate assumptions	$ 7,582	$ 8,436	7,582	8,436	$ 6,144	$ 8,425
Issuances			670	9,097
Market risk benefit, period increase (decrease)			(17)	273
Effect of changes in interest rates			(383)	74
Effect of changes in instrument-specific credit risk	(2)	400	(2)	400	8	(366)
Attributed fees collected			175	166
Effect of changes in equity			(81)	(61)
Liability for Future Policy Benefit, Adverse Development, Expense			35	111
Remeasurement gains (losses) on future policy benefits related to discount rate	628	813	1,431	11
Payout annuities with life contingencies
Additional Liability, Long-Duration Insurance [Line Items]
Future policy benefit, interest expense			901	751
Interest accrual			901
Benefit payments			(2,243)
Effect of changes in discount rate assumptions	$ 7,537	$ 8,436	7,537	8,436	$ 6,233	$ 8,425
Issuances			$ 670	$ 9,097