Derivative Instruments - Impact on Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Gross derivative receivables	$ 539,248	$ 639,593
Net derivative receivables	54,864	70,880
Gross derivative payables	546,972	637,513
Net derivative payables	40,847	51,141
Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	250,691	300,415
Net derivative receivables	26,324	28,419
Gross derivative payables	240,482	290,291
Net derivative payables	11,896	15,970
Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	9,654	10,329
Net derivative receivables	551	1,090
Gross derivative payables	12,038	9,971
Net derivative payables	1,089	754
Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	205,775	241,579
Net derivative receivables	18,019	23,365
Gross derivative payables	212,263	251,521
Net derivative payables	12,620	18,856
Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	57,689	61,913
Net derivative receivables	4,928	9,139
Gross derivative payables	65,811	62,461
Net derivative payables	9,368	8,804
Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	15,439	25,357
Net derivative receivables	5,042	8,867
Gross derivative payables	16,378	23,269
Net derivative payables	5,874	6,757
Not designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	538,270	636,251
Gross derivative payables	545,240	632,392
Not designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	250,689	300,411
Gross derivative payables	240,482	290,291
Not designated as hedges | Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	9,654	10,329
Gross derivative payables	12,038	9,971
Not designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	205,010	239,946
Gross derivative payables	210,623	248,911
Not designated as hedges | Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	57,689	61,913
Gross derivative payables	65,811	62,461
Not designated as hedges | Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	15,228	23,652
Gross derivative payables	16,286	20,758
Designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	978	3,342
Gross derivative payables	1,732	5,121
Designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	2	4
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	765	1,633
Gross derivative payables	1,640	2,610
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	211	1,705
Gross derivative payables	$ 92	$ 2,511