Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 45	$ 60
Amortized cost	6,774	6,827
Other invested assets fair value	3	4
Assets of consolidated investment vehicles, fair value disclosure	118	99
Other assets, fair value disclosure	134	131
Financial guaranty variable interest entities' liabilities, with recourse	153	155
Financial guaranty variable interest entities' liabilities, without recourse	10	9
Other liabilities. fair value disclosure	$ 34	$ 34
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000,000	500,000,000
Common stock, shares issued (in shares)	49,553,438	50,505,320
Common stock, shares outstanding (in shares)	49,553,438	50,505,320
Accumulated other comprehensive income, tax provision	$ (64)	$ (75)