Supplemental Disclosures of Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Non-cash transactions:
Establishment of funds withheld liability in connection with a reinsurance transaction	$ 0	$ (6)
Net increase (decrease) in fixed maturity AFS securities and accrued investment income in connection with reinsurance activity	$ (267)	$ (193)