Supplemental Disclosures of Cash Flow Data (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Supplemental Cash Flow Information
Interest	$ 344	$ 269	$ 277
Income taxes	0	(54)	1
Non-cash transactions:
Net reduction of fixed maturity AFS securities and accrued investment income in connection with a reinsurance transaction	(14,848)	0	(4,133)
Establishment of funds withheld liability in connection with a reinsurance transaction	$ (9,459)	$ 0	$ 0