Business segments (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015 USD ($)		Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) segment		Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	[1]
Segment Reporting Information [Line Items]
Number of reportable segments | segment				4
Noninterest revenue	$ 13,128		$ 13,880	$ 26,517		$ 26,428
Net interest income	10,684		10,798	21,361		21,465
Total net revenue	23,812		24,678	47,878		47,893
Provision for credit losses	935		692	1,894		1,542
Noninterest expense	14,500		15,431	29,383		30,067
Income before income tax expense	8,377		8,555	16,601		16,284
Income tax expense/(benefit)	2,087		2,575	4,397		5,035
Net income	6,290		5,980	12,204		11,249
Average common equity	213,738		206,159	213,049		203,989
Assets	$ 2,449,599	[1]	$ 2,519,995	$ 2,449,599	[1]	$ 2,519,995	$ 2,572,773
Return on average common equity	11.00%		11.00%	11.00%		11.00%
Overhead ratio	61.00%		63.00%	61.00%		63.00%
Operating Segments | Consumer & Community Banking
Segment Reporting Information [Line Items]
Noninterest revenue	$ 4,089		$ 4,468	$ 7,825		$ 7,902
Net interest income	6,926		7,050	13,894		14,150
Total net revenue	11,015		11,518	21,719		22,052
Provision for credit losses	702		852	1,632		1,668
Noninterest expense	6,210		6,456	12,400		12,893
Income before income tax expense	4,103		4,210	7,687		7,491
Income tax expense/(benefit)	1,570		1,714	2,935		3,014
Net income	2,533		2,496	4,752		4,477
Average common equity	51,000		51,000	51,000		51,000
Assets	$ 472,181		$ 447,277	$ 472,181		$ 447,277
Return on average common equity	19.00%		19.00%	18.00%		17.00%
Overhead ratio	56.00%		56.00%	57.00%		58.00%
Operating Segments | Corporate & Investment Bank
Segment Reporting Information [Line Items]
Noninterest revenue	$ 6,233		$ 6,519	$ 13,307		$ 12,745
Net interest income	2,490		2,746	4,998		5,362
Total net revenue	8,723		9,265	18,305		18,107
Provision for credit losses	50		(84)	19		(35)
Noninterest expense	5,137		6,058	10,794		11,662
Income before income tax expense	3,536		3,291	7,492		6,480
Income tax expense/(benefit)	1,195		1,160	2,614		2,224
Net income	2,341		2,131	4,878		4,256
Average common equity	62,000		61,000	62,000		61,000
Assets	$ 819,745		$ 872,947	$ 819,745		$ 872,947
Return on average common equity	14.00%		13.00%	15.00%		13.00%
Overhead ratio	59.00%		65.00%	59.00%		64.00%
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Noninterest revenue	$ 609		$ 577	$ 1,245		$ 1,135
Net interest income	1,130		1,154	2,236		2,274
Total net revenue	1,739		1,731	3,481		3,409
Provision for credit losses	182		(67)	243		(62)
Noninterest expense	703		675	1,412		1,361
Income before income tax expense	854		1,123	1,826		2,110
Income tax expense/(benefit)	329		446	703		839
Net income	525		677	1,123		1,271
Average common equity	14,000		14,000	14,000		14,000
Assets	$ 201,377		$ 192,523	$ 201,377		$ 192,523
Return on average common equity	14.00%		19.00%	15.00%		18.00%
Overhead ratio	40.00%		39.00%	41.00%		40.00%
Operating Segments | Asset Management
Segment Reporting Information [Line Items]
Noninterest revenue	$ 2,544		$ 2,380	$ 4,928		$ 4,598
Net interest income	631		602	1,252		1,184
Total net revenue	3,175		2,982	6,180		5,782
Provision for credit losses	0		1	4		(8)
Noninterest expense	2,406		2,062	4,581		4,137
Income before income tax expense	769		919	1,595		1,653
Income tax expense/(benefit)	318		350	642		630
Net income	451		569	953		1,023
Average common equity	9,000		9,000	9,000		9,000
Assets	$ 134,059		$ 128,362	$ 134,059		$ 128,362
Return on average common equity	19.00%		25.00%	21.00%		22.00%
Overhead ratio	76.00%		69.00%	74.00%		72.00%
Operating Segments | Corporate
Segment Reporting Information [Line Items]
Noninterest revenue	$ 100		$ 351	$ 140		$ 875
Net interest income	(221)		(510)	(474)		(1,035)
Total net revenue	(121)		(159)	(334)		(160)
Provision for credit losses	1		(10)	(4)		(21)
Noninterest expense	44		180	196		14
Income before income tax expense	(166)		(329)	(526)		(153)
Income tax expense/(benefit)	(606)		(436)	(1,024)		(375)
Net income	440		107	498		222
Average common equity	77,738		71,159	77,049		68,989
Assets	822,237		878,886	822,237		878,886
Reconciling Items
Segment Reporting Information [Line Items]
Noninterest revenue	(447)		(415)	(928)		(827)
Net interest income	(272)		(244)	(545)		(470)
Total net revenue	(719)		(659)	(1,473)		(1,297)
Provision for credit losses	0		0	0		0
Noninterest expense	0		0	0		0
Income before income tax expense	(719)		(659)	(1,473)		(1,297)
Income tax expense/(benefit)	(719)		(659)	(1,473)		(1,297)
Net income	0		0	0		0
Average common equity	$ 0		$ 0	$ 0		$ 0

[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.