Interest Income and Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest income
Loans	$ 11,626	$ 10,145	$ 22,259	$ 20,332
Taxable securities	2,289	1,577	4,268	3,182
Non-taxable securities	245	270	490	547
Total investment securities	2,534	1,847	4,758	3,729
Trading assets - debt instruments	2,049	1,711	3,816	3,493
Federal funds sold and securities purchased under resale agreements	543	175	940	408
Securities borrowed	173	(90)	86	(167)
Deposits with banks	1,079	103	1,317	168
All other interest-earning assets	642	203	966	402
Total interest income	18,646	14,094	34,142	28,365
Interest expense
Interest-bearing deposits	898	132	1,080	278
Federal funds purchased and securities loaned or sold under repurchase agreements	468	60	585	75
Short-term borrowings	90	33	130	66
Trading liabilities – debt and all other interest-bearing liabilities	471	51	662	78
Long-term debt	1,561	1,056	2,637	2,190
Beneficial interest issued by consolidated VIEs	30	21	48	48
Total interest expense	3,518	1,353	5,142	2,735
Net interest income	15,128	12,741	29,000	25,630
Provision for credit losses	1,101	(2,285)	2,564	(6,441)
Net interest income after provision for credit losses	$ 14,027	$ 15,026	$ 26,436	$ 32,071