Variable Interest Entities - Nonconsolidated Municipal Bond VIEs (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2016		Dec. 31, 2015		Mar. 31, 2015
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Total assets	$ 2,423,808	[1]	$ 2,351,698	[1]	$ 2,576,619
Nonconsolidated municipal bond vehicles | Municipal bond vehicles
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Total assets	5,917		6,937
Liquidity facilities	3,260		3,794
Excess/ (deficit)	$ 2,657		$ 3,143
Wt. avg. expected life of assets (years)	3 years 10 months 24 days		4 years
Nonconsolidated municipal bond vehicles | Municipal bond vehicles | Investment-grade AAA to AAA-
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Total assets	$ 1,547		$ 1,743
Nonconsolidated municipal bond vehicles | Municipal bond vehicles | Investment-grade AAplus to AA-
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Total assets	3,881		4,631
Nonconsolidated municipal bond vehicles | Municipal bond vehicles | Investment-grade Aplus to A-
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Total assets	368		448
Nonconsolidated municipal bond vehicles | Municipal bond vehicles | Investment-grade BBBplus to BBB-
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Total assets	24		24
Nonconsolidated municipal bond vehicles | Municipal bond vehicles | Noninvestment-grade BBplus and below
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Total assets	97		91
Nonconsolidated entities | Municipal bond vehicles
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Maximum exposure	$ 3,260		$ 3,794

[1] The following table presents information on assets and liabilities related to variable interest entities (“VIEs”) that are consolidated by the Firm at March 31, 2016, and December 31, 2015. 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, 2016 Dec 31, 2015Assets Trading assets$4,834 $3,736Loans66,680 75,104All other assets3,523 2,765Total assets$75,037 $81,605Liabilities Beneficial interests issued by consolidated VIEs$38,673 $41,879All other liabilities789 809Total liabilities$39,462 $42,688The 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 March 31, 2016, and December 31, 2015, 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.