Earnings Per Share of Common Stock Earnings Per Share Reconciliation (Details) - USD ($) $ in Millions			8 Months Ended	12 Months Ended
		Aug. 31, 2017	Aug. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Predecessor [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Income from Continuing Operations after Income Taxes, attributable to DuPont			$ 1,624	$ 2,072	$ 1,443
Preferred Dividends			(7)	(10)	(10)
Income from continuing operations after income taxes available to DuPont common stockholders			1,617	2,062	1,433
Income from Discontinued Operations after income taxes available to DuPont common stockholders			117	441	510
Net Income Available to Common Stockholders			$ 1,734	$ 2,503	$ 1,943
Weighted Average Number of Shares Outstanding, Basic			868,000,000	873,000,000	894,000,000
Dilutive effect of the company's employee compensation plans	[1]		5,000,000	4,000,000	6,000,000
Weighted Average Number of Shares Outstanding, Diluted	[1]		872,000,000	877,000,000	900,000,000
Common Stock [Member] | Merger with Dow [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Share exchange ratio, DuPont to DowDuPont		1.2820

[1] Diluted earnings per share considers the impact of potentially dilutive securities except in periods in which there is a loss because the inclusion of the potential common shares would have an anti-dilutive effect.