Earnings Per Share of Common Stock (Earnings Per Share of Common Stock Reconciliation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Income from continuing operations after income taxes attributable to DuPont	$ 1,889	$ 3,135	$ 2,193
Preferred dividends	(10)	(10)	(10)
Income from continuing operations after income taxes available to DuPont common shareholders	1,879	3,125	2,183
Income from discontinued operations after income taxes	64	490	2,655
Net income available to common stockholders	$ 1,943	$ 3,615	$ 4,838
Weighted-average number of common shares outstanding - Basic	893,992,000	914,752,000	925,984,000
Dilutive effect of the company's equity compensation plans	5,535,000	7,121,000	7,163,000
Weighted average number of common shares outstanding - Diluted	899,527,000	921,873,000	933,147,000