Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021
Accounts Payable and Accrued Liabilities [Abstract]
Unfunded commitments for investment in qualified affordable housing projects	$ 818	$ 869
Accounts payable	482	435
Employee compensation and benefits	344	424
Deferred revenue	161	169
Reserves for insurance losses and loss adjustment expenses	145	119	$ 122	$ 122
Operating lease liabilities	123	137
Other liabilities	534	495
Total accrued expenses and other liabilities	$ 2,607	$ 2,648
Operating lease, liability, statement of financial position [Extensible Enumeration]	Total accrued expenses and other liabilities	Total accrued expenses and other liabilities