Earnings Per Share of Common Stock

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Earnings Per Share of Common Stock

Earnings Per Share of Common Stock

Set forth below is a reconciliation of the numerator and denominator for basic and diluted earnings per share calculations for the periods indicated:

	Three Months Ended
	March 31,
	2012			2011
Numerator:
Net income attributable to DuPont	$	1,488		$	1,431
Preferred dividends	(3		)	(3		)
Net income available to common stockholders	$	1,485		$	1,428
Denominator:
Weighted-average number of common shares outstanding - Basic	933,910,000			924,897,000
Dilutive effect of the company’s employee compensation plans	10,328,000			16,012,000
Weighted-average number of common shares outstanding - Diluted	944,238,000			940,909,000

The following average number of stock options were antidilutive, and therefore, were not included in the diluted earnings per share calculations: 

	Three Months Ended
	March 31,
	2012	2011
Average number of stock options	10,724,000	—

The change in the average number of stock options that were antidilutive in the three months ended March 31, 2012 compared to the same period last year was primarily due to changes in the company’s average stock price.