Business Segments (Details) (USD $)	12 Months Ended														3 Months Ended		12 Months Ended
	Dec. 31, 2012 segment		Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2012 Consumer & Community Banking [Member]	Dec. 31, 2011 Consumer & Community Banking [Member]	Dec. 31, 2010 Consumer & Community Banking [Member]	Dec. 31, 2012 Corporate & Investment Bank [Member]	Dec. 31, 2011 Corporate & Investment Bank [Member]	Dec. 31, 2010 Corporate & Investment Bank [Member]	Dec. 31, 2012 Commercial Banking [Member]	Dec. 31, 2011 Commercial Banking [Member]	Dec. 31, 2010 Commercial Banking [Member]	Dec. 31, 2012 Commercial Banking [Member] Minimum [Member]	Dec. 31, 2012 Commercial Banking [Member] Maximum [Member]	Dec. 31, 2012 Asset Management [Member]	Dec. 31, 2011 Asset Management [Member]	Dec. 31, 2010 Asset Management [Member]	Dec. 31, 2012 Corporate/Private Equity [Member]	Dec. 31, 2011 Corporate/Private Equity [Member]	Dec. 31, 2010 Corporate/Private Equity [Member]	Dec. 31, 2012 Reconciling Items [Member]	Dec. 31, 2011 Reconciling Items [Member]	Dec. 31, 2010 Reconciling Items [Member]
Business and Segment Description [Abstract]
Number of JPMorgan Chase & Co business segments	4
Client Revenue															$ 20,000,000	$ 2,000,000,000
Assets under supervision																	2,100,000,000,000
Segment results and reconciliation
Noninterest revenue	52,121,000,000		49,545,000,000		51,693,000,000	20,795,000,000	15,306,000,000	15,513,000,000	23,104,000,000	22,523,000,000	22,889,000,000	2,283,000,000	2,195,000,000	2,200,000,000			7,847,000,000	7,895,000,000	7,485,000,000	208,000,000	3,629,000,000	5,351,000,000	(2,116,000,000)	(2,003,000,000)	(1,745,000,000)
Income before income tax benefit and undistributed net income of subsidiaries	28,917,000,000		26,749,000,000		24,859,000,000
Net interest income	44,910,000,000		47,689,000,000		51,001,000,000	29,150,000,000	30,381,000,000	33,414,000,000	11,222,000,000	11,461,000,000	10,588,000,000	4,542,000,000	4,223,000,000	3,840,000,000			2,099,000,000	1,648,000,000	1,499,000,000	(1,360,000,000)	506,000,000	2,063,000,000	(743,000,000)	(530,000,000)	(403,000,000)
Revenues	97,031,000,000		97,234,000,000		102,694,000,000	49,945,000,000	45,687,000,000	48,927,000,000	34,326,000,000	33,984,000,000	33,477,000,000	6,825,000,000	6,418,000,000	6,040,000,000			9,946,000,000	9,543,000,000	8,984,000,000	(1,152,000,000)	4,135,000,000	7,414,000,000	(2,859,000,000)	(2,533,000,000)	(2,148,000,000)
Provision for credit losses	3,385,000,000		7,574,000,000		16,639,000,000	3,774,000,000	7,620,000,000	17,489,000,000	(479,000,000)	(285,000,000)	(1,247,000,000)	41,000,000	208,000,000	297,000,000			86,000,000	67,000,000	86,000,000	(37,000,000)	(36,000,000)	14,000,000	0	0	0
Noninterest expense	64,729,000,000		62,911,000,000		61,196,000,000	28,790,000,000	27,544,000,000	23,706,000,000	21,850,000,000	21,979,000,000	22,869,000,000	2,389,000,000	2,278,000,000	2,199,000,000			7,104,000,000	7,002,000,000	6,112,000,000	4,596,000,000	4,108,000,000	6,310,000,000	0	0	0
Income/(loss) before income tax expense/(benefit)			26,749,000,000		24,859,000,000	17,381,000,000	10,523,000,000	7,732,000,000	12,955,000,000	12,290,000,000	11,855,000,000	4,395,000,000	3,932,000,000	3,544,000,000			2,756,000,000	2,474,000,000	2,786,000,000	(5,711,000,000)	63,000,000	1,090,000,000	(2,859,000,000)	(2,533,000,000)	(2,148,000,000)
Income tax expense/(benefit)	7,633,000,000		7,773,000,000		7,489,000,000	6,770,000,000	4,321,000,000	3,154,000,000	4,549,000,000	4,297,000,000	4,137,000,000	1,749,000,000	1,565,000,000	1,460,000,000			1,053,000,000	882,000,000	1,076,000,000	(3,629,000,000)	(759,000,000)	(190,000,000)	(2,859,000,000)	(2,533,000,000)	(2,148,000,000)
Net income/(loss)			18,976,000,000		17,370,000,000	10,611,000,000	6,202,000,000	4,578,000,000	8,406,000,000	7,993,000,000	7,718,000,000	2,646,000,000	2,367,000,000	2,084,000,000			1,703,000,000	1,592,000,000	1,710,000,000	(2,082,000,000)	822,000,000	1,280,000,000	0	0	0
Average common equity	184,352,000,000		173,266,000,000		161,520,000,000	43,000,000,000	41,000,000,000	43,000,000,000	47,500,000,000	47,000,000,000	46,500,000,000	9,500,000,000	8,000,000,000	8,000,000,000			7,000,000,000	6,500,000,000	6,500,000,000	77,352,000,000	70,766,000,000	57,520,000,000	0	0	0
Assets	2,359,141,000,000	[1]	2,265,792,000,000	[1]	2,117,605,000,000	463,608,000,000	483,307,000,000	508,775,000,000	876,107,000,000	845,095,000,000	870,631,000,000	181,502,000,000	158,040,000,000	142,646,000,000			108,999,000,000	86,242,000,000	68,997,000,000	728,925,000,000	693,108,000,000	526,556,000,000
Return on average common equity	11.00%		11.00%		10.00%	25.00%	15.00%	11.00%	18.00%	17.00%	17.00%	28.00%	30.00%	26.00%			24.00%	25.00%	26.00%
Overhead ratio	67.00%		65.00%		60.00%	58.00%	60.00%	48.00%	64.00%	65.00%	68.00%	35.00%	35.00%	36.00%			71.00%	73.00%	68.00%
Net Income (Loss) Attributable to Parent	21,284,000,000		18,976,000,000		17,370,000,000
Segment Managed Results Tax Equivalent Adjustment
Noninterest revenue	2,116,000,000		2,003,000,000		1,745,000,000
Net interest income	743,000,000		530,000,000		403,000,000
Income tax expense	$ 2,859,000,000		$ 2,533,000,000		$ 2,148,000,000

[1] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at December 31, 2012 and 2011. The difference between total VIE assets and liabilities represents the Firm’s interests in those entities, which were eliminated in consolidation.December 31, (in millions)2012 2011Assets Trading assets$11,966 $12,079Loans82,723 86,754All other assets2,090 2,638Total assets$96,779 $101,471Liabilities Beneficial interests issued by consolidated variable interest entities$63,191 $65,977All other liabilities1,244 1,487Total liabilities$64,435 $67,464The 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 December 31, 2012 and 2011, the Firm provided limited program-wide credit enhancement of $3.1 billion related to its Firm-administered multi-seller conduits, which are eliminated in consolidation. For further discussion, see Note 16 on pages 280–291 of this Annual Report.