Variable Interest Entities - Resecuritizations, Multi-seller Conduits (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Variable Interest Entity [Line Items]
Securities transferred to agency resecuritization VIEs	$ 3,900,000,000		$ 5,300,000,000
Securities transferred to private-label re-securitization VIEs	472,000,000		169,000,000
Assets	2,577,148,000,000	[1]	2,476,650,000,000	2,572,773,000,000	[1]
Off-balance sheet lending-related financial commitments, contractual amount	949,166,000,000		946,047,000,000	950,997,000,000
Not Primary Beneficiary, Nonconsolidated Private-Label Re-securitizations
Variable Interest Entity [Line Items]
Assets	2,300,000,000			2,900,000,000
Mortgage Securitization Entities | Private label Resecuritizations
Variable Interest Entity [Line Items]
Senior and subordinated interest in nonconsolidated agency re-securitization entities	14,000,000			36,000,000
Mortgage Securitization Entities | Private label Resecuritizations | Residential mortgage-backed securities
Variable Interest Entity [Line Items]
VIE, consolidated, carrying amount assets	73,000,000			77,000,000
VIE, consolidated, carrying amount liabilities	19,000,000			21,000,000
Mortgage Securitization Entities | Re securitizations
Variable Interest Entity [Line Items]
Senior and subordinated interest in nonconsolidated agency re-securitization entities	1,600,000,000			2,400,000,000
Firm-administered multi-seller conduits
Variable Interest Entity [Line Items]
Commercial paper issued by consolidated Variable Interest Entities eliminated in Consolidation	4,900,000,000			5,700,000,000
Firm-administered multi-seller conduits | Mortgage-backed securities, Commercial
Variable Interest Entity [Line Items]
Off-balance sheet lending-related financial commitments, contractual amount	$ 10,200,000,000			$ 9,900,000,000

[1] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at March 31, 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)Mar 31, 2015 Dec 31, 2014Assets Trading assets$7,703 $9,090Loans67,184 68,880All other assets2,350 1,815Total assets$77,237 $79,785Liabilities Beneficial interests issued by consolidated variable interest entities$51,091 $52,362All other liabilities911 949Total liabilities$52,002 $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 March 31, 2015, and December 31, 2014, the Firm provided limited program-wide credit enhancement of $2.0 billion and $2.0 billion, respectively, related to its Firm-administered multi-seller conduits, which are eliminated in consolidation. For further discussion, see Note 15.