Variable Interest Entities - Resecuritizations, Multi-seller Conduits (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Variable Interest Entity [Line Items]
Securities transferred to agency resecuritization VIEs	$ 10,000,000,000		$ 24,900,000,000		$ 33,900,000,000
Securities transferred to private-label re-securitization VIEs	286,000,000		381,000,000		1,300,000,000
Assets	2,359,141,000,000	[1]	2,265,792,000,000	[1]	2,117,605,000,000
Off-Balance Sheet Lending-Related Financial Commitments, Contractual Amount	1,027,988,000,000		975,662,000,000		958,709,000,000
Putable floating-rate certificates of municipal bond vehicles	893,000,000		637,000,000
Mortgage Securitization Entities | Re securitizations [Member]
Variable Interest Entity [Line Items]
Senior and subordinated interest in nonconsolidated agency re-securitization entities	2,000,000,000		3,600,000,000
Mortgage Securitization Entities | Re securitizations [Member] | Private label Resecuritizations [Member]
Variable Interest Entity [Line Items]
Senior and subordinated interest in nonconsolidated agency re-securitization entities	61,000,000		14,000,000
Mortgage Securitization Entities | Re securitizations [Member] | Residential Mortgage Backed Securities [Member] | Private label Resecuritizations [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	76,000,000		348,000,000
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	5,000,000		139,000,000
Multi-seller conduits
Variable Interest Entity [Line Items]
Commercial paper issued by consolidated Variable Interest Entities eliminated in Consolidation	8,300,000,000		11,300,000,000
Multi-seller conduits | Commercial Mortgage Backed Securities [Member]
Variable Interest Entity [Line Items]
Off-Balance Sheet Lending-Related Financial Commitments, Contractual Amount	10,800,000,000		10,800,000,000
Nonconsolidated Private-Label Re-securitizations [Member]
Variable Interest Entity [Line Items]
Assets	4,600,000,000		3,300,000,000
Range Maximum [Member]
Variable Interest Entity [Line Items]
Program-Wide Credit Enhancement Required Amount	10.00%
Putable floating-rate certificates of municipal bond vehicles	$ 1,775,000,000
Putable Floating Rate Certificates of Municipal Bond Vehicles Held During Period, Percent	8.00%

[1] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at December 31, 2012 and 2011. The difference between total VIE assets and liabilities represents the Firm’s interests in those entities, which were eliminated in consolidation.December 31, (in millions)2012 2011Assets Trading assets$11,966 $12,079Loans82,723 86,754All other assets2,090 2,638Total assets$96,779 $101,471Liabilities Beneficial interests issued by consolidated variable interest entities$63,191 $65,977All other liabilities1,244 1,487Total liabilities$64,435 $67,464The assets of the consolidated VIEs are used to settle the liabilities of those entities. The holders of the beneficial interests do not have recourse to the general credit of JPMorgan Chase. At both December 31, 2012 and 2011, the Firm provided limited program-wide credit enhancement of $3.1 billion related to its Firm-administered multi-seller conduits, which are eliminated in consolidation. For further discussion, see Note 16 on pages 280–291 of this Annual Report.