Earnings Per Share of Common Stock (Earnings Per Share of Common Stock Reconciliation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Income from continuing operations after income taxes attributable to DuPont	$ 2,509	$ 1,889	$ 3,135
Preferred dividends	(10)	(10)	(10)
Income from continuing operations after income taxes available to DuPont common shareholders	2,499	1,879	3,125
Income from discontinued operations after income taxes	4	64	490
Net income available to common stockholders	$ 2,503	$ 1,943	$ 3,615
Weighted-average number of common shares outstanding - Basic	872,560,000	893,992,000	914,752,000
Dilutive effect of the company's equity compensation plans	4,476,000	5,535,000	7,121,000
Weighted average number of common shares outstanding - Diluted	877,036,000	899,527,000	921,873,000