Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Cash and Cash Equivalents [Abstract]
Cash and due from banks	$ 1,411	$ 2,168
Interest bearing deposits with the Federal Reserve Bank	7,550	5,686
Interest bearing deposits with other institutions	4,610	5,773
Securities purchased under agreements to resell	397	607
Other short-term investment securities	0	352
Total cash and cash equivalents	$ 13,968	$ 14,586