Earnings Per Share of Common Stock (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share of Common Stock Reconciliation

(In millions, except share amounts)	For the Period July 1 - August 31, 2017			For the Period January 1 - August 31, 2017
Numerator:
(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
Denominator:
Weighted-average number of common shares outstanding - Basic	868,992,000			867,888,000
Dilutive effect of the company’s employee compensation plans1	—			4,532,000
Weighted-average number of common shares outstanding - Diluted1	868,992,000			872,420,000

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	For the Period July 1 - August 31, 2017	For the Period January 1 - August 31, 2017
Average number of stock options	4,832,000	1,906