Other Assets (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Components of Other Assets [Line Items]
Corporate/bank-owned life insurance	$ 20,667	$ 20,619
Accounts receivable	25,308	20,831
Operating lease assets (lessor)	6,040	6,182
Operating lease ROU assets (lessee)	3,782	3,805
Customer relationship and other amortized intangibles	1,438	1,480
Foreclosed assets	130	112
Due from customers on acceptances	125	155
Other	12,548	11,729
Total other assets	72,480	67,259
Customer relationship and other amortized intangibles [Member]
Components of Other Assets [Line Items]
Customer relationship and other amortized intangibles	196	211
AFS And HTM debt securities [Member]
Components of Other Assets [Line Items]
Interest receivable	1,352	1,360
Loans [Member]
Components of Other Assets [Line Items]
Interest receivable	1,978	1,950
Trading and other [Member]
Components of Other Assets [Line Items]
Interest receivable	$ 354	$ 305