Earnings Per Share of Common Stock (Tables)

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Earnings Per Share of Common Stock Reconciliation

	2011			2010			2009
Numerator:
Net income attributable to DuPont	$	3,474		$	3,031		$	1,755
Preferred dividends	(10		)	(10		)	(10		)
Net income available to common stockholders	$	3,464		$	3,021		$	1,745
Denominator:
Weighted-average number of common shares outstanding – Basic	928,417,000			908,860,000			904,395,000
Dilutive effect of the company's employee compensation plans	12,612,000			12,795,000			4,317,000
Weighted average number of common shares outstanding – Diluted	941,029,000			921,655,000			908,712,000

Average Number of Anitdilutive Stock Options

	2011	2010	2009
Average number of stock options	4,361,000	45,508,000	72,899,000