Interest Income and Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Interest income
Loans	$ 22,874	$ 17,708
Taxable securities	4,871	3,967
Non-taxable securities	323	248
Total investment securities	5,194	4,215
Trading assets - debt instruments	4,592	3,646
Federal funds sold and securities purchased under resale agreements	4,215	3,131
Securities borrowed	2,166	1,716
Deposits with banks	6,386	4,819
All other interest-earning assets	2,011	1,769
Total interest income	47,438	37,004
Interest expense
Interest-bearing deposits	12,234	7,637
Federal funds purchased and securities loaned or sold under repurchase agreements	3,969	2,804
Short-term borrowings	535	421
Trading liabilities – debt and all other interest-bearing liabilities	2,636	1,971
Long-term debt	4,618	3,313
Beneficial interest issued by consolidated VIEs	364	147
Total interest expense	24,356	16,293
Net interest income	23,082	20,711
Provision for credit losses	1,884	2,275
Net interest income after provision for credit losses	$ 21,198	$ 18,436