Derivative Instruments - Impact on Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Gross derivative receivables	$ 615,519	$ 639,593
Net derivative receivables	67,070	70,880
Gross derivative payables	603,490	637,513
Net derivative payables	41,963	51,141
Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	290,941	300,415
Net derivative receivables	31,097	28,419
Gross derivative payables	277,805	290,291
Net derivative payables	15,974	15,970
Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	11,616	10,329
Net derivative receivables	1,318	1,090
Gross derivative payables	11,375	9,971
Net derivative payables	882	754
Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	237,316	241,579
Net derivative receivables	22,608	23,365
Gross derivative payables	234,424	251,521
Net derivative payables	12,905	18,856
Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	58,178	61,913
Net derivative receivables	5,720	9,139
Gross derivative payables	62,329	62,461
Net derivative payables	6,905	8,804
Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	17,468	25,357
Net derivative receivables	6,327	8,867
Gross derivative payables	17,557	23,269
Net derivative payables	5,297	6,757
Not designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	613,812	636,251
Gross derivative payables	602,051	632,392
Not designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	290,941	300,411
Gross derivative payables	277,798	290,291
Not designated as hedges | Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	11,616	10,329
Gross derivative payables	11,375	9,971
Not designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	235,863	239,946
Gross derivative payables	233,104	248,911
Not designated as hedges | Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	58,178	61,913
Gross derivative payables	62,329	62,461
Not designated as hedges | Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	17,214	23,652
Gross derivative payables	17,445	20,758
Designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	1,707	3,342
Gross derivative payables	1,439	5,121
Designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	0	4
Gross derivative payables	7	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	1,453	1,633
Gross derivative payables	1,320	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	254	1,705
Gross derivative payables	$ 112	$ 2,511