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
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Line Items]
Income from discontinued operations after income taxes	$ 0	$ 1,968
Earnings Per Share Numerator [Member]
Earnings Per Share [Line Items]
Income from continuing operations after income taxes attributable to DuPont	1,439	1,380
Preferred dividends	(2)	(3)
Income from continuing operations after income taxes available to DuPont common stockholders	1,437	1,377
Income from discontinued operations after income taxes	0	1,968
Net income available to common stockholders	$ 1,437	$ 3,345
Earnings Per Share Denominator [Member]
Earnings Per Share [Line Items]
Weighted-average number of common shares outstanding - Basic	923,461,000	928,348,000
Dilutive effect of the company's employee compensation plans	7,271,000	7,042,000
Weighted average number of common shares outstanding - Diluted	930,732,000	935,390,000