Variable Interest Entities - Resecuritizations, Multi-seller Conduits (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014	Dec. 31, 2014
Variable Interest Entity [Line Items]
Securities transferred to agency resecuritization VIEs	$ 6,300		$ 8,000	$ 10,200		$ 13,300
Securities transferred to private-label re-securitization VIEs	255		264	727		433
Assets	2,449,599	[1]	2,519,995	2,449,599	[1]	2,519,995	$ 2,572,773	[1]
Off-balance sheet lending-related financial commitments, contractual amount	935,582		1,041,373	935,582		1,041,373	950,997
Not Primary Beneficiary, Nonconsolidated Private-Label Re-securitizations
Variable Interest Entity [Line Items]
Assets	2,500			2,500			2,900
Mortgage Securitization Entities | Re securitizations
Variable Interest Entity [Line Items]
Senior and subordinated interest in nonconsolidated agency re-securitization entities	3,300			3,300			2,400
Mortgage Securitization Entities | Private label Resecuritizations
Variable Interest Entity [Line Items]
Senior and subordinated interest in nonconsolidated agency re-securitization entities	31			31			36
Mortgage Securitization Entities | Private label Resecuritizations | Residential mortgage-backed securities
Variable Interest Entity [Line Items]
VIE, consolidated, carrying amount assets	50			50			77
VIE, consolidated, carrying amount liabilities	3			3			21
Firm-administered multi-seller conduits
Variable Interest Entity [Line Items]
Commercial paper issued by consolidated Variable Interest Entities eliminated in Consolidation	3,600			3,600			5,700
Firm-administered multi-seller conduits | Mortgage-backed securities, Commercial
Variable Interest Entity [Line Items]
Off-balance sheet lending-related financial commitments, contractual amount	9,900			9,900			$ 9,900
Fair Value, Inputs, Level 3 [Member] | Residential mortgage-backed securities
Variable Interest Entity [Line Items]
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers			0			21
Fair Value, Inputs, Level 3 [Member] | Mortgage-backed securities, Commercial
Variable Interest Entity [Line Items]
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers	$ 38		$ 130	$ 38		$ 130

[1] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at June 30, 2015, and December 31, 2014. The difference between total VIE assets and liabilities represents the Firm’s interests in those entities, which were eliminated in consolidation.(in millions)Jun 30, 2015 Dec 31, 2014Assets Trading assets$5,168 $9,090Loans67,116 68,880All other assets2,274 1,815Total assets$74,558 $79,785Liabilities Beneficial interests issued by consolidated variable interest entities$50,002 $52,362All other liabilities868 949Total liabilities$50,870 $53,311The 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 June 30, 2015, and December 31, 2014, the Firm provided limited program-wide credit enhancement of $2.0 billion related to its Firm-administered multi-seller conduits, which are eliminated in consolidation. For further discussion, see Note 15.