Derivative Instruments - Impact on Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Gross derivative receivables	$ 1,176,256	$ 961,878
Net derivative receivables	70,209	59,677
Gross derivative payables	1,146,129	942,912
Net derivative payables	59,319	52,790
Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	858,360	669,611
Net derivative receivables	35,610	26,363
Gross derivative payables	817,239	635,166
Net derivative payables	16,553	10,221
Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	48,621	51,468
Net derivative receivables	1,094	1,423
Gross derivative payables	47,991	50,529
Net derivative payables	1,072	1,541
Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	208,538	179,875
Net derivative receivables	18,932	17,177
Gross derivative payables	215,651	190,900
Net derivative payables	21,935	19,769
Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	38,647	35,859
Net derivative receivables	6,265	5,529
Gross derivative payables	40,081	38,663
Net derivative payables	8,410	9,183
Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	22,090	25,065
Net derivative receivables	8,308	9,185
Gross derivative payables	25,167	27,654
Net derivative payables	11,349	12,076
Not designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	1,169,315	955,643
Gross derivative payables	1,140,060	939,170
Not designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	852,042	665,531
Gross derivative payables	813,774	632,928
Not designated as hedges | Credit
Derivatives, Fair Value [Line Items]
Gross derivative receivables	48,621	51,468
Gross derivative payables	47,991	50,529
Not designated as hedges | Foreign exchange
Derivatives, Fair Value [Line Items]
Gross derivative receivables	208,145	179,072
Gross derivative payables	213,154	189,397
Not designated as hedges | Equity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	38,647	35,859
Gross derivative payables	40,081	38,663
Not designated as hedges | Commodity
Derivatives, Fair Value [Line Items]
Gross derivative receivables	21,860	23,713
Gross derivative payables	25,060	27,653
Designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	6,941	6,235
Gross derivative payables	6,069	3,742
Designated as hedges | Interest rate
Derivatives, Fair Value [Line Items]
Gross derivative receivables	6,318	4,080
Gross derivative payables	3,465	2,238
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	803
Gross derivative payables	2,497	1,503
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	230	1,352
Gross derivative payables	$ 107	$ 1