Supplemental Disclosures of Cash Flow Data (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Supplemental Cash Flow Information
Interest	$ 372	$ 344	$ 269
Income taxes	0	0	(54)
Non-cash transactions:
Net reduction of fixed maturity AFS securities and accrued investment income in connection with a reinsurance transaction	0	(14,848)	0
Establishment of funds withheld liability in connection with a reinsurance transaction	$ 0	$ (9,459)	$ 0