Interest Income and Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Interest income
Loans	$ 24,024	$ 22,420
Taxable securities	6,975	5,992
Non-taxable securities	282	270
Total investment securities	7,257	6,262
Trading assets - debt instruments	7,221	5,557
Federal funds sold and securities purchased under resale agreements	4,185	4,216
Securities borrowed	2,368	2,307
Deposits with banks	2,317	4,139
All other interest-earning assets	1,819	1,952
Total interest income	49,191	46,853
Interest expense
Interest-bearing deposits	10,284	11,077
Federal funds purchased and securities loaned or sold under repurchase agreements	6,145	5,189
Short-term borrowings	525	535
Trading liabilities – debt and all other interest-bearing liabilities	2,263	2,091
Long-term debt	4,342	4,392
Beneficial interest issued by consolidated VIEs	266	296
Total interest expense	23,825	23,580
Net interest income	25,366	23,273
Provision for credit losses	2,507	3,305
Net interest income after provision for credit losses	$ 22,859	$ 19,968