Derivative Instruments - Impact on Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Derivatives, Fair Value [Line Items]
Gross derivative receivables	$ 668,835	$ 606,382
Net derivative receivables	71,584	57,777
Gross derivative payables	651,332	596,738
Net derivative payables	51,290	46,329
Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	287,095	281,884
Net derivative receivables	25,777	25,401
Gross derivative payables	263,346	257,583
Net derivative payables	8,590	7,461
Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	15,529	13,024
Net derivative receivables	1,588	479
Gross derivative payables	18,733	17,628
Net derivative payables	1,978	2,016
Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	213,833	183,236
Net derivative receivables	23,950	19,355
Gross derivative payables	206,743	178,141
Net derivative payables	15,802	14,833
Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	112,357	97,723
Net derivative receivables	9,405	5,867
Gross derivative payables	126,691	117,017
Net derivative payables	16,367	14,806
Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	40,021	30,515
Net derivative receivables	10,864	6,675
Gross derivative payables	35,819	26,369
Net derivative payables	8,553	7,213
Not designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	666,912	605,450
Gross derivative payables	649,114	594,129
Not designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	287,095	281,884
Gross derivative payables	263,345	257,582
Not designated as hedges | Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	15,529	13,024
Gross derivative payables	18,733	17,628
Not designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	212,620	182,887
Gross derivative payables	205,602	177,158
Not designated as hedges | Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	112,357	97,723
Gross derivative payables	126,691	117,017
Not designated as hedges | Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	39,311	29,932
Gross derivative payables	34,743	24,744
Designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	1,923	932
Gross derivative payables	2,218	2,609
Designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	0	0
Gross derivative payables	1	1
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	1,213	349
Gross derivative payables	1,141	983
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	710	583
Gross derivative payables	$ 1,076	$ 1,625