Derivative Instruments - Impact on Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Gross derivative receivables	$ 1,275,451	$ 1,328,428
Derivative receivables balance	81,574us-gaap_DerivativeAssets	78,975us-gaap_DerivativeAssets
Gross derivative payables	1,265,881	1,310,773
Net derivative payables	73,836us-gaap_DerivativeLiabilities	71,116us-gaap_DerivativeLiabilities
Interest rate contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	899,081	950,257
Derivative receivables balance	36,148	33,725
Gross derivative payables	866,023	918,379
Net derivative payables	17,890	17,745
Credit derivatives
Derivatives, Fair Value [Line Items]
Gross derivative receivables	63,336	76,842
Derivative receivables balance	1,528	1,838
Gross derivative payables	62,425	75,895
Net derivative payables	1,220	1,593
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	227,957	215,187
Derivative receivables balance	25,696	21,253
Gross derivative payables	242,779	224,614
Net derivative payables	27,094	22,970
Equity contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	45,889	42,489
Derivative receivables balance	7,410	8,177
Gross derivative payables	52,694	46,262
Net derivative payables	13,190	11,740
Commodity contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	39,188	43,653
Derivative receivables balance	10,792	13,982
Gross derivative payables	41,960	45,623
Net derivative payables	14,442	17,068
Not designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	1,265,420	1,318,904
Gross derivative payables	1,261,402	1,306,968
Not designated as hedges \| Interest rate contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	892,648	944,885
Gross derivative payables	862,785	915,368
Not designated as hedges \| Credit derivatives
Derivatives, Fair Value [Line Items]
Gross derivative receivables	63,336	76,842
Gross derivative payables	62,425	75,895
Not designated as hedges \| Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	224,698	211,537
Gross derivative payables	241,606	223,988
Not designated as hedges \| Equity contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	45,889	42,489
Gross derivative payables	52,694	46,262
Not designated as hedges \| Commodity contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	38,849	43,151
Gross derivative payables	41,892	45,455
Designated as hedges
Derivatives, Fair Value [Line Items]
Gross derivative receivables	10,031	9,524
Gross derivative payables	4,479	3,805
Designated as hedges \| Interest rate contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	6,433	5,372
Gross derivative payables	3,238	3,011
Designated as hedges \| Credit derivatives
Derivatives, Fair Value [Line Items]
Gross derivative receivables	0	0
Gross derivative payables	0	0
Designated as hedges \| Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	3,259	3,650
Gross derivative payables	1,173	626
Designated as hedges \| Equity contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	0	0
Gross derivative payables	0	0
Designated as hedges \| Commodity contracts
Derivatives, Fair Value [Line Items]
Gross derivative receivables	339	502
Gross derivative payables	$ 68	$ 168

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-Publisher FASB

-Name Accounting Standards Codification

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