Subsequent Events (Pro Forma Income Statement) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Subsequent Event [Line Items]
Net sales	$ 8,595	$ 9,706	$ 17,767	$ 19,834
Income from continuing operations before income taxes	1,175	1,440	2,776	3,242
Net income attributable to DuPont	$ 940	$ 1,070	$ 1,971	$ 2,509
Basic earnings per share of common stock	$ 1.04	$ 1.16	$ 2.17	$ 2.72
Diluted earnings per share of common stock	$ 1.03	$ 1.15	$ 2.15	$ 2.70
Discontinued Operation Performance Chemicals [Member]
Subsequent Event [Line Items]
Net sales	$ 1,474		$ 2,809
Income from continuing operations before income taxes	(59)		(9)
Net income attributable to DuPont	(29)		(15)
Pro Forma DuPont Continuing Operations [Member]
Subsequent Event [Line Items]
Net sales	7,121		14,958
Income from continuing operations before income taxes	1,234		2,785
Net income attributable to DuPont	$ 969		$ 1,986
Basic earnings per share of common stock	$ 1.07		$ 2.19
Diluted earnings per share of common stock	$ 1.06		$ 2.17