Business Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Dec. 31, 2011
Business and Segment Description [Abstract]
Number of JPMorgan Chase & Co business segments	6
Approximate balance of current consumer credit card loans	$ 720,967				$ 723,720
Segment results and reconciliation
Noninterest revenue	15,046		13,316
Net interest income	11,666		11,905
Total net revenue	26,712		25,221
Provision for credit losses	726		1,169
Credit allocation income/(expense)	0		0
Noninterest expense	18,345		15,995
Income before income tax expense	7,641		8,057
Income tax expense/(benefit)	2,258		2,502
Net income/(loss)	5,383		5,555
Average common equity	177,711		169,415
Total assets	2,320,330	[1]	2,198,161	[1]	2,265,792	[1]
Return on average common equity	12.00%		13.00%
Overhead ratio	69.00%		63.00%
Net interest income	11,666		11,905
Net income	5,383		5,555
Segment Managed Results Tax Equivalent Adjustment
Noninterest revenue	534		451
Net interest income	171		119
Income tax expense	705		570
Investment Bank
Segment results and reconciliation
Noninterest revenue	5,418		6,176
Net interest income	1,903		2,057
Total net revenue	7,321		8,233
Provision for credit losses	(5)		(429)
Credit allocation income/(expense)	0		0
Noninterest expense	4,738		5,016
Income before income tax expense	2,588		3,646
Income tax expense/(benefit)	906		1,276
Net income/(loss)	1,682		2,370
Average common equity	40,000		40,000
Total assets	812,959		853,452
Return on average common equity	17.00%		24.00%
Overhead ratio	65.00%		61.00%
Retail Financial Services
Segment results and reconciliation
Noninterest revenue	3,724		1,380
Net interest income	3,925		4,086
Total net revenue	7,649		5,466
Provision for credit losses	(96)		1,199
Credit allocation income/(expense)	0		0
Noninterest expense	5,009		4,900
Income before income tax expense	2,736		(633)
Income tax expense/(benefit)	983		(234)
Net income/(loss)	1,753		(399)
Average common equity	26,500		25,000
Total assets	269,442		289,336
Return on average common equity	27.00%		(6.00%)
Overhead ratio	65.00%		90.00%
Card Services
Segment results and reconciliation
Noninterest revenue	1,251		1,047
Net interest income	3,463		3,744
Total net revenue	4,714		4,791
Provision for credit losses	738		353
Credit allocation income/(expense)	0		0
Noninterest expense	2,029		1,917
Income before income tax expense	1,947		2,521
Income tax expense/(benefit)	764		987
Net income/(loss)	1,183		1,534
Average common equity	16,500		16,000
Total assets	199,579		201,179
Return on average common equity	29.00%		39.00%
Overhead ratio	43.00%		40.00%
Commercial Banking
Segment results and reconciliation
Noninterest revenue	557		502
Net interest income	1,100		1,014
Total net revenue	1,657		1,516
Provision for credit losses	77		47
Credit allocation income/(expense)	0		0
Noninterest expense	598		563
Income before income tax expense	982		906
Income tax expense/(benefit)	391		360
Net income/(loss)	591		546
Average common equity	9,500		8,000
Total assets	161,741		140,706
Return on average common equity	25.00%		28.00%
Overhead ratio	36.00%		37.00%
Treasury & Securities Services
Segment results and reconciliation
Noninterest revenue	1,067		1,137
Net interest income	947		703
Total net revenue	2,014		1,840
Provision for credit losses	2		4
Credit allocation income/(expense)	3		27
Noninterest expense	1,473		1,377
Income before income tax expense	542		486
Income tax expense/(benefit)	191		170
Net income/(loss)	351		316
Average common equity	7,500		7,000
Total assets	66,732		50,614
Return on average common equity	19.00%		18.00%
Overhead ratio	73.00%		75.00%
Asset Management [Member]
Segment results and reconciliation
Noninterest revenue	1,887		2,020
Net interest income	483		386
Total net revenue	2,370		2,406
Provision for credit losses	19		5
Credit allocation income/(expense)	0		0
Noninterest expense	1,729		1,660
Income before income tax expense	622		741
Income tax expense/(benefit)	236		275
Net income/(loss)	386		466
Average common equity	7,000		6,500
Total assets	96,385		71,521
Return on average common equity	22.00%		29.00%
Overhead ratio	73.00%		69.00%
Corporate/Private Equity
Segment results and reconciliation
Noninterest revenue	1,673		1,478
Net interest income	16		34
Total net revenue	1,689		1,512
Provision for credit losses	(9)		(10)
Credit allocation income/(expense)	0		0
Noninterest expense	2,769		562
Income before income tax expense	(1,071)		960
Income tax expense/(benefit)	(508)		238
Net income/(loss)	(563)		722
Average common equity	70,711		66,915
Total assets	713,492		591,353
Reconciling Items [Member]
Segment results and reconciliation
Noninterest revenue	(531)		(424)
Net interest income	(171)		(119)
Total net revenue	(702)		(543)
Provision for credit losses	0		0
Credit allocation income/(expense)	(3)		(27)
Noninterest expense	0		0
Income before income tax expense	(705)		(570)
Income tax expense/(benefit)	(705)		(570)
Net income/(loss)	0		0
Average common equity	$ 0		$ 0

[1] (a)The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at March 31, 2012, and December 31, 2011. The difference between total VIE assets and liabilities represents the Firm’s interests in those entities, which were eliminated in consolidation.