Parent Company - Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities
Net income	$ 24,442	$ 21,745	$ 17,886
Other operating adjustments	(5,122)	314	(2,129)
Net cash provided by operating activities	73,466	36,593	107,953
Investing activities
Available-for-sale securities: Proceeds from paydowns and maturities	76,448	90,664	89,631
Available-for-sale securities: Purchases	(70,804)	(121,504)	(130,266)
Other changes in loans, net	(108,962)	(51,749)	(23,721)
All other investing activities, net	3,703	2,181	(828)
Net cash provided by/(used in) investing activities	106,980	(165,636)	(150,501)
Financing activities
Net change in: Other borrowed funds	(57,828)	9,242	2,784
Proceeds from the issuance of long-term debt	79,611	78,515	83,546
Payments of long-term debt	(67,247)	(65,275)	(60,497)
Proceeds from issuance of preferred stock	5,893	8,847	3,873
Redemption of preferred stock	0	0	(1,800)
Treasury stock and warrants repurchased	(5,616)	(4,760)	(4,789)
Dividends paid	(7,873)	(6,990)	(6,056)
All other financing activities, net	(726)	(768)	(913)
Net cash provided by/(used in) financing activities	(187,511)	118,228	28,324
Net decrease in cash and due from banks	(7,341)	(11,940)	(13,952)
Cash and due from banks at the beginning of the period	27,831	39,771	53,723
Cash and due from banks at the end of the period	20,490	27,831	39,771
Cash interest paid	7,220	8,194	9,573
JPMorgan Chase & Co.
Operating activities
Net income	24,442	21,745	17,886
Less: Net income of subsidiaries and affiliates	26,745	22,972	25,496
Parent company net loss	(2,303)	(1,227)	(7,610)
Cash dividends from subsidiaries and affiliates	17,023	14,714	1,917
Other operating adjustments	2,483	(1,681)	3,217
Net cash provided by operating activities	17,203	11,806	(2,476)
Investing activities
Net change in: Deposits with banking subsidiaries	30,085	(31,040)	10,679
Available-for-sale securities: Proceeds from paydowns and maturities	120	12,076	61
Available-for-sale securities: Purchases	0	0	(12,009)
Other changes in loans, net	321	(319)	(713)
Advances to and investments in subsidiaries and affiliates, net	(81)	3,306	14,469
All other investing activities, net	153	32	22
Net cash provided by/(used in) investing activities	30,598	(15,945)	12,509
Financing activities
Net change in: Borrowings from subsidiaries and affiliates	(4,062)	4,454	(2,715)
Net change in: Other borrowed funds	(47,483)	(5,778)	(7,297)
Proceeds from the issuance of long-term debt	42,121	40,284	31,303
Payments of long-term debt	(30,077)	(31,050)	(21,510)
Proceeds from issuance of preferred stock	5,893	8,847	3,873
Redemption of preferred stock	0	0	(1,800)
Treasury stock and warrants repurchased	(5,616)	(4,760)	(4,789)
Dividends paid	(7,873)	(6,990)	(6,056)
All other financing activities, net	(840)	(921)	(994)
Net cash provided by/(used in) financing activities	(47,937)	4,086	(9,985)
Net decrease in cash and due from banks	(137)	(53)	48
Cash and due from banks at the beginning of the period	211	264	216
Cash and due from banks at the end of the period	74	211	264
Cash interest paid	3,873	3,921	4,409
Cash income taxes paid, net	$ 8,251	$ 200	$ 2,390