Derivative Instruments - Impact on Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Gross derivative receivables	$ 545,287	$ 703,368
Net derivative receivables	57,081	75,444
Gross derivative payables	535,044	688,887
Net derivative payables	50,116	70,623
Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	270,585	391,648
Net derivative receivables	21,974	35,725
Gross derivative payables	240,731	353,987
Net derivative payables	8,194	13,012
Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	9,839	13,345
Net derivative receivables	1,031	680
Gross derivative payables	10,912	14,832
Net derivative payables	880	1,995
Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	169,579	206,260
Net derivative receivables	12,625	15,781
Gross derivative payables	175,746	215,926
Net derivative payables	14,097	21,433
Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	68,631	70,612
Net derivative receivables	9,981	16,487
Gross derivative payables	79,727	81,413
Net derivative payables	17,233	25,898
Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	26,653	21,503
Net derivative receivables	11,470	6,771
Gross derivative payables	27,928	22,729
Net derivative payables	9,712	8,285
Not designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	539,451	700,712
Gross derivative payables	526,829	685,295
Not designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	270,562	390,817
Gross derivative payables	240,731	353,987
Not designated as hedges | Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	9,839	13,345
Gross derivative payables	10,912	14,832
Not designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	169,186	205,359
Gross derivative payables	174,622	214,229
Not designated as hedges | Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	68,631	70,612
Gross derivative payables	79,727	81,413
Not designated as hedges | Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	21,233	20,579
Gross derivative payables	20,837	20,834
Designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	5,836	2,656
Gross derivative payables	8,215	3,592
Designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	23	831
Gross derivative payables	0	0
Designated as hedges | Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	0	0
Gross derivative payables	0	0
Designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	393	901
Gross derivative payables	1,124	1,697
Designated as hedges | Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	0	0
Gross derivative payables	0	0
Designated as hedges | Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	5,420	924
Gross derivative payables	$ 7,091	$ 1,895