Variable Interest Entities - Municipal Bond Vehicle VIEs (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Jun. 30, 2015		Dec. 31, 2014		Jun. 30, 2014
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Assets	$ 2,449,599	[1]	$ 2,572,773	[1]	$ 2,519,995
Nonconsolidated municipal bond vehicles | Municipal bond vehicles
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Assets	11,700		11,500
Liquidity facilities provided by Firm serving as liquidity provider	6,600		6,300
Excess/ (deficit)	$ 5,100		$ 5,200
Weighted average expected life of assets (years)	4 years 10 months 24 days		4 years 10 months 24 days
Nonconsolidated municipal bond vehicles | Municipal bond vehicles | Investment Grade AAA to AAA-
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Assets	$ 2,700		$ 2,700
Nonconsolidated municipal bond vehicles | Municipal bond vehicles | Investment Grade AAplus to AA-
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Assets	8,600		8,400
Nonconsolidated municipal bond vehicles | Municipal bond vehicles | Investment Grade Aplus to A-
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Assets	400		400
Nonconsolidated municipal bond vehicles | Municipal bond vehicles | Investment Grade BBBplus to BBB-
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Assets	0		0
Nonconsolidated municipal bond vehicles | Municipal bond vehicles | Non Investment Grade BBplus and below
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Assets	0		0
Variable Interest Entity, Not Primary Beneficiary | Municipal bond vehicles
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Maximum exposure	$ 6,600		$ 6,300

[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.