Earnings Per Share of Common Stock (Earnings Per Share of Common Stock Reconciliation) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012		Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Line Items]
Income from discontinued operations after income taxes	$ 25	$ 48		$ 1,997	$ 219
Earnings Per Share Numerator [Member]
Earnings Per Share [Line Items]
Income (loss) from continuing operations after income taxes attributable to DuPont	260	(43)		2,666	2,444
Preferred dividends	(3)	(3)		(8)	(8)
Income (loss) from continuing operations after income taxes available to DuPont common stockholders	257	(46)		2,658	2,436
Income from discontinued operations after income taxes	25	48		1,997	219
Net income available to common stockholders	$ 282	$ 2		$ 4,655	$ 2,655
Earnings Per Share Denominator [Member]
Earnings Per Share [Line Items]
Weighted-average number of common shares outstanding - Basic	925,645,000	931,737,000		925,548,000	933,227,000
Dilutive effect of the company's employee compensation plans	7,360,000	8,789,000	[1]	6,994,000	9,297,000
Weighted average number of common shares outstanding - Diluted	933,005,000	940,526,000		932,542,000	942,524,000

[1] Dilutive effect of the company's employee compensation plans are excluded from calculation of dilutive loss per share of common stock from continuing operations for the three months ended September 30, 2012.