Common stock (Details) (USD $)	12 Months Ended				0 Months Ended	12 Months Ended			2 Months Ended	3 Months Ended			9 Months Ended	12 Months Ended			25 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Mar. 13, 2012 Approved Repurchase Program Period Start in 2012 [Member]	Dec. 31, 2013 Additional Paid-in Capital [Member]	Dec. 31, 2012 Additional Paid-in Capital [Member]	Dec. 31, 2011 Additional Paid-in Capital [Member]	May 04, 2012 Common Stock [Member]	Mar. 13, 2012 Common Stock [Member]	Jun. 30, 2013 Common Stock [Member]	Mar. 31, 2013 Common Stock [Member]	Dec. 31, 2011 Common Stock [Member]	Dec. 31, 2013 Common Stock [Member]	Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2011 Common Stock [Member]	Mar. 18, 2011 Common Stock [Member]	Dec. 31, 2013 Treasury stock, at cost [Member]	Dec. 31, 2012 Treasury stock, at cost [Member]	Dec. 31, 2011 Treasury stock, at cost [Member]	Dec. 31, 2013 Treasury stock, at cost [Member] Stock Compensation Plan [Member]	Dec. 31, 2012 Treasury stock, at cost [Member] Stock Compensation Plan [Member]	Dec. 31, 2011 Treasury stock, at cost [Member] Stock Compensation Plan [Member]	Dec. 31, 2013 JPMorgan Chase & Co. [Member] Warrants, each to purchase one share of Common Stock [Member]	Dec. 31, 2012 JPMorgan Chase & Co. [Member] Warrants, each to purchase one share of Common Stock [Member]	Dec. 31, 2011 JPMorgan Chase & Co. [Member] Warrants, each to purchase one share of Common Stock [Member]	Dec. 31, 2013 JPMorgan Chase & Co. [Member] Warrants, each to purchase one share of Common Stock [Member] Additional Paid-in Capital [Member]	Dec. 31, 2012 JPMorgan Chase & Co. [Member] Warrants, each to purchase one share of Common Stock [Member] Additional Paid-in Capital [Member]	Dec. 31, 2011 JPMorgan Chase & Co. [Member] Warrants, each to purchase one share of Common Stock [Member] Additional Paid-in Capital [Member]
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	9,000,000,000	9,000,000,000
Common stock, par value (in dollars per share)	$ 1	$ 1.00
Increase (Decrease) in Common Stock Shares
Issued - balance at January 1	4,104,933,895		4,104,933,895	4,104,933,895
Total issued - balance at December 31	4,104,933,895		4,104,933,895	4,104,933,895
Increase (Decrease) in Treasury Stock Shares
Treasury - balance at January 1	(300,981,690)																	(300,981,690)	(332,200,000)	(194,600,000)
Purchase of treasury stock																		(96,100,000)	(33,500,000)	(226,900,000)	0	(200,000)	(100,000)
Issued from treasury																		48,300,000	65,000,000	89,400,000	47,100,000	63,700,000	88,300,000
Issued from treasury: Employee stock purchase plans																		1,100,000	1,300,000	1,100,000
Total treasury - balance at December 31	(348,825,583)																	(348,825,583)	(300,981,690)	(332,200,000)
Outstanding	3,756,100,000	3,804,000,000	3,772,700,000
U.S. Treasury Capital Purchase Program
Warrants outstanding																								59,759,399	59,762,699	78,233,999
Exercise price for US Treasury Warrant to purchase shares of the Firm's common stock	42.42
Stock repurchase program, shares authorized					$ 15,000,000,000
Remaining authorized repurchase amount	8,600,000,000
Common Equity Repurchase Program
Total shares of common stock repurchased														96,000,000	31,000,000	229,000,000
Aggregate common stock repurchases														4,789,000,000	1,329,000,000	8,827,000,000
Total warrants repurchased																								0	18,000,000	10,000,000
Aggregate warrant repurchases						$ (24,000,000)	$ (262,000,000)	$ (125,000,000)																			$ 0	$ 238,000,000	$ 122,000,000
Common stock quarterly dividend rate per share									$ 0.30	$ 0.25	$ 0.38	$ 0.30	$ 0.25				$ 0.05
Common stock capital shares reserved for future issuance														290,000,000