Other Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Other Assets [Abstract]
Securities borrowed	$ 25,322	$ 16,489
Derivative instruments, net	6,428	7,664
Bank-owned life insurance	3,701	3,649
Investments in joint ventures and other unconsolidated entities	2,905	3,245
Collateral, net	2,495	1,833
Deferred tax assets, net of valuation allowance	1,139	1,127
Prepaid expenses	671	558
Receivable for securities settlement	663	383
Right-of-use assets	579	500
Accounts receivable	399	404
Income taxes receivable	243	235
Deposits with clearing organizations	58	62
Other	1,978	1,753
Total	46,581	37,902
Equity securities without readily determinable fair value, amount	186	179
Advances	1,122	$ 1,201
Gain on observable transaction	$ 0