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Earnings Per Share of Common Stock | 9 Months Ended
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Sep. 30, 2015
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 | Nine Months Ended
| September 30, | September 30,
| 2015 | 2014 | 2015 | 2014
Numerator: |  |  |  |
Income from continuing operations after income taxes attributable to DuPont | $ | 131 |  | $ | 330 |  | $ | 2,117 |  | $ | 2,558 |
Preferred dividends | (2 | ) | (2 | ) | (7 | ) | (7 | )
Income from continuing operations after income taxes available to DuPont common stockholders | $ | 129 |  | $ | 328 |  | $ | 2,110 |  | $ | 2,551 |
Income from discontinued operations after income taxes available to DuPont common stockholders | $ | 104 |  | $ | 103 |  | $ | 89 |  | $ | 384 |
Net income available to common stockholders | $ | 233 |  | $ | 431 |  | $ | 2,199 |  | $ | 2,935 |
Denominator: |  |  |  |
Weighted-average number of common shares outstanding - Basic | 887,275,000 |  | 910,764,000 |  | 899,883,000 |  | 917,589,000 |
Dilutive effect of the company’s employee compensation plans | 4,011,000 |  | 6,997,000 |  | 5,639,000 |  | 7,057,000 |
Weighted-average number of common shares outstanding - Diluted | 891,286,000 |  | 917,761,000 |  | 905,522,000 |  | 924,646,000 |
The following average number of stock options were antidilutive, and therefore not included in the dilutive earnings per share calculations:
| Three Months Ended | Nine Months Ended
| September 30, | September 30,
| 2015 | 2014 | 2015 | 2014
Average number of stock options | 8,510,000 |  | 7,000 |  | 4,622,000 |  | 4,000 |
The change in the average number of stock options that were antidilutive in the three and nine months ended September 30, 2015 compared to the same period last year was due to changes in the company's average stock price.

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