Other Assets (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023	Dec. 31, 2022
Other Assets [Abstract]
Securities borrowed	$ 24,065	$ 24,065	$ 16,489
Derivative instruments, net	7,804	7,804	7,664
Bank-owned life insurance	3,730	3,730	3,649
Investments in joint ventures and other unconsolidated entities	2,840	2,840	3,245
Collateral, net	3,104	3,104	1,833
Deferred tax assets, net of valuation allowance	1,020	1,020	1,127
Prepaid expenses	610	610	558
Receivable for securities settlement	670	670	383
Right-of-use assets	823	823	500
Accounts receivable	472	472	404
Income taxes receivable	238	238	235
Deposits with clearing organizations	58	58	62
Other	1,798	1,798	1,753
Total	47,232	47,232	37,902
Equity securities without readily determinable fair value, amount	181	181	179
Equity securities without readily determinable fair value, impairment loss	5	5
Advances	$ 968	$ 968	$ 1,201