Earnings Per Share of Common Stock

6 Months Ended

Jun. 30, 2011

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						Six Months Ended
	June 30,						June 30,
	2011			2010			2011			2010
Numerator:
Net income attributable to DuPont	$	1,218		$	1,159		$	2,649		$	2,288
Preferred dividends	(2		)	(2		)	(5		)	(5		)
Net income available to DuPont common stockholders	$	1,216		$	1,157		$	2,644		$	2,283
Denominator:
Weighted-average number of common shares - Basic	930,798,000			907,099,000			927,860,000			906,289,000
Dilutive effect of the company’s employee    compensation plans	13,189,000			7,449,000			14,601,000			6,927,000
Weighted-average number of common shares - Diluted	943,987,000			914,548,000			942,461,000			913,216,000

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

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2011	2010	2011	2010
Average number of stock options	—	59,083,000	—	61,713,000

The change in the average number of stock options that were antidilutive in the three and six months ended June 30, 2011 compared to the same periods last year was primarily due to changes in the company’s average stock price.