Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 66	$ 77
Amortized cost	6,565	6,746
Other invested assets fair value	5	3
Financial guaranty variable interest entities' assets	156	174
Assets of consolidated investment vehicles, fair value disclosure	334	331
Other assets, fair value disclosure	129	123
Financial guaranty variable interest entities' liabilities, with recourse	382	543
Financial guaranty variable interest entities' liabilities, without recourse	$ 10	$ 11
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)	51,556,750	56,217,305
Common stock, shares outstanding (in shares)	51,556,750	56,217,305
Accumulated other comprehensive income, tax provision	$ (47)	$ (67)