Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Cash and Cash Equivalents [Abstract]
Cash and due from banks	$ 1,801	$ 2,201
Interest bearing deposits with the Federal Reserve Bank	7,827	5,686
Interest bearing deposits with other institutions	5,146	5,773
Securities purchased under agreements to resell	544	607
Other short-term investment securities	80	352
Total cash and cash equivalents	$ 15,398	$ 14,619