Earnings Per Share of Common Stock Earnings Per Share Reconciliation (Details) - USD ($) $ in Millions			2 Months Ended	8 Months Ended
		Aug. 31, 2017	Aug. 31, 2017	Aug. 31, 2017
Predecessor [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
(Loss) Income from Continuing Operations after Income Taxes, attributable to DuPont			$ (263)	$ 1,624
Preferred Dividends			(2)	(7)
(Loss) Income from Continuing Operations after income taxes available to DuPont common stockholders			(265)	1,617
Income from Discontinued Operations after income taxes available to DuPont common stockholders			29	117
Net (Loss) Income Available to Common Stockholders			$ (236)	$ 1,734
Weighted Average Number of Shares Outstanding, Basic			868,992,000	867,888,000
Dilutive effect of the company's employee compensation plans	[1]		0	4,532,000
Weighted Average Number of Shares Outstanding, Diluted			868,992,000	872,420,000
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.