Derivative Instruments - Impact on Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Gross derivative receivables	$ 539,442	$ 539,248
Net derivative receivables	54,673	54,864
Gross derivative payables	535,353	546,972
Net derivative payables	34,818	40,847
Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	234,987	250,691
Net derivative receivables	25,585	26,324
Gross derivative payables	222,027	240,482
Net derivative payables	11,034	11,896
Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	10,384	9,654
Net derivative receivables	665	551
Gross derivative payables	12,487	12,038
Net derivative payables	1,163	1,089
Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	190,696	205,775
Net derivative receivables	17,789	18,019
Gross derivative payables	189,756	212,263
Net derivative payables	10,706	12,620
Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	84,860	57,689
Net derivative receivables	5,830	4,928
Gross derivative payables	93,003	65,811
Net derivative payables	7,011	9,368
Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	18,515	15,439
Net derivative receivables	4,804	5,042
Gross derivative payables	18,080	16,378
Net derivative payables	4,904	5,874
Not designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	538,540	538,270
Gross derivative payables	534,695	545,240
Not designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	234,987	250,689
Gross derivative payables	222,021	240,482
Not designated as hedges | Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	10,384	9,654
Gross derivative payables	12,487	12,038
Not designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	189,889	205,010
Gross derivative payables	189,130	210,623
Not designated as hedges | Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	84,860	57,689
Gross derivative payables	93,003	65,811
Not designated as hedges | Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	18,420	15,228
Gross derivative payables	18,054	16,286
Designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	902	978
Gross derivative payables	658	1,732
Designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	0	2
Gross derivative payables	6	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	807	765
Gross derivative payables	626	1,640
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	95	211
Gross derivative payables	$ 26	$ 92