Parent Company - Statements of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating activities
Net income	$ 21,762	$ 17,923	$ 21,284
Other, net	442	(2,037)	(3,613)
Net cash provided by operating activities	36,593	107,953	25,079
Investing activities
Available-for-sale securities: Proceeds from sales and maturities	90,664	89,631	112,633
Available-for-sale securities: Purchases	(121,504)	(130,266)	(189,630)
Other changes in loans, net	(51,749)	(23,721)	(30,491)
All other investing activities, net	1,338	(679)	(3,400)
Net cash used in investing activities	(165,636)	(150,501)	(119,825)
Financing activities
Net change in other borrowed funds	9,242	2,784	9,315
Proceeds from the issuance of long-term debt	78,515	83,546	86,271
Payments of long-term debt	(65,275)	(60,497)	(96,473)
Excess tax benefits related to stock-based compensation	407	137	255
Proceeds from issuance of preferred stock	8,847	3,873	1,234
Redemption of preferred stock	0	(1,800)	0
Treasury stock and warrants repurchased	(4,760)	(4,789)	(1,653)
Dividends paid	(6,990)	(6,056)	(5,194)
All other financing activities, net	(1,175)	(1,050)	(189)
Net cash provided by financing activities	118,228	28,324	87,707
Net decrease in cash and due from banks	(11,940)	(13,952)	(5,879)
Cash and due from banks at the beginning of the period	39,771	53,723	59,602
Cash and due from banks at the end of the period	27,831	39,771	53,723
Cash interest paid	8,194	9,573	11,161
JPMorgan Chase & Co.
Operating activities
Net income	21,762	17,923	21,284
Less: Net income of subsidiaries and affiliates	22,972	25,496	23,474
Parent company net loss	(1,210)	(7,573)	(2,190)
Cash Dividends from Subsidiaries and Affiliates	14,714	1,917	6,798
Other, net	(1,698)	3,180	2,376
Net cash provided by operating activities	11,806	(2,476)	6,984
Investing activities
Net change in: Deposits with banking subsidiaries	(31,040)	10,679	16,100
Available-for-sale securities: Proceeds from sales and maturities	12,076	61	621
Available-for-sale securities: Purchases	0	(12,009)	(364)
Other changes in loans, net	(319)	(713)	(350)
Advances to and investments in subsidiaries and affiliates, net	3,306	14,469	9,497
All other investing activities, net	32	22	25
Net cash used in investing activities	(15,945)	12,509	25,529
Financing activities
Net change in borrowings from subsidiaries and affiliates	4,454	(2,715)	(14,038)
Net change in other borrowed funds	(5,778)	(7,297)	3,736
Proceeds from the issuance of long-term debt	40,284	31,303	28,172
Payments of long-term debt	(31,050)	(21,510)	(44,240)
Excess tax benefits related to stock-based compensation	407	137	255
Proceeds from issuance of preferred stock	8,847	3,873	1,234
Redemption of preferred stock	0	(1,800)	0
Treasury stock and warrants repurchased	(4,760)	(4,789)	(1,653)
Dividends paid	(6,990)	(6,056)	(5,194)
All other financing activities, net	(1,328)	(1,131)	(701)
Net cash provided by financing activities	4,086	(9,985)	(32,429)
Net decrease in cash and due from banks	(53)	48	84
Cash and due from banks at the beginning of the period	264	216	132
Cash and due from banks at the end of the period	211	264	216
Cash interest paid	3,921	4,409	5,690
Cash income taxes paid, net	$ 200	$ 2,390	$ 3,080