Interest Income and Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Interest income
Loans	$ 22,898	$ 20,306	$ 45,772	$ 38,014
Taxable securities	5,124	4,194	9,995	8,161
Non-taxable securities	302	343	625	591
Total investment securities	5,426	4,537	10,620	8,752
Trading assets - debt instruments	4,993	4,013	9,585	7,659
Federal funds sold and securities purchased under resale agreements	4,821	3,767	9,036	6,898
Securities borrowed	2,177	1,866	4,343	3,582
Deposits with banks	6,059	5,189	12,445	10,008
All other interest-earning assets	2,139	1,966	4,150	3,735
Total interest income	48,513	41,644	95,951	78,648
Interest expense
Interest-bearing deposits	12,421	9,591	24,655	17,228
Federal funds purchased and securities loaned or sold under repurchase agreements	5,108	3,400	9,077	6,204
Short-term borrowings	502	428	1,037	849
Trading liabilities – debt and all other interest-bearing liabilities	2,604	2,373	5,240	4,344
Long-term debt	4,780	3,876	9,398	7,189
Beneficial interest issued by consolidated VIEs	352	197	716	344
Total interest expense	25,767	19,865	50,123	36,158
Net interest income	22,746	21,779	45,828	42,490
Provision for credit losses	3,052	2,899	4,936	5,174
Net interest income after provision for credit losses	$ 19,694	$ 18,880	$ 40,892	$ 37,316