Commitments and Guarantees - Contractual Amounts of Credit-Related Off-Balance Sheet Financial Instruments (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2022	Jun. 30, 2021	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Unfunded credit facilities	$ 33,757		$ 33,026
Indemnified securities financing	395,507		385,740
Standby letters of credit	$ 2,615		$ 3,237
Unfunded commitments to extend credit, short term	75.00%		76.00%
Term of unfunded commitment	1 year	1 year