Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 86	$ 65
Amortized cost	6,971	7,707
Financial guaranty variable interest entities' assets	326	413
Assets of consolidated investment vehicles, fair value disclosure	318	5,363
Other assets, fair value disclosure	112	148
Financial guaranty variable interest entities' liabilities, with recourse	531	702
Financial guaranty variable interest entities' liabilities, without recourse	11	13
Liabilities of consolidated investment vehicles, fair value disclosure	$ 0	$ 4,431
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)	57,819,732	59,013,040
Common stock, shares outstanding (in shares)	57,819,732	59,013,040
Accumulated other comprehensive income, tax provision	$ (97)	$ (84)