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Earnings Per Share of Common Stock | 12 Months Ended
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Dec. 31, 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:
| 2015 | 2014 | 2013
Numerator: |  |  |  |  |  |
Income from continuing operations after income taxes attributable to DuPont | $ | 1,889 |  | $ | 3,135 |  | $ | 2,193 |
Preferred dividends | (10 | ) | (10 | ) | (10 | )
Income from continuing operations after income taxes available to DuPont common stockholders | $ | 1,879 |  | $ | 3,125 |  | $ | 2,183 |
Income from discontinued operations after income taxes | $ | 64 |  | $ | 490 |  | $ | 2,655 |
Net income available to common stockholders | $ | 1,943 |  | $ | 3,615 |  | $ | 4,838 |
Denominator: |  |  |  |  |  |
Weighted-average number of common shares outstanding – Basic | 893,992,000 |  | 914,752,000 |  | 925,984,000 |
Dilutive effect of the company's equity compensation plans | 5,535,000 |  | 7,121,000 |  | 7,163,000 |
Weighted-average number of common shares outstanding – Diluted | 899,527,000 |  | 921,873,000 |  | 933,147,000 |
The weighted-average number of common shares outstanding in 2015 and 2014 decreased as a result of the company's repurchase and retirement of its common stock, partially offset by the issuance of new shares from the company's equity compensation plans(see Notes 17 and 19, respectively). The following average number of stock options are antidilutive and therefore, are not included in the diluted earnings per share calculation:
| 2015 | 2014 | 2013
Average number of stock options | 4,715,000 |  | 3,000 |  | 2,596,000 |
The change in the average number of stock options that were antidilutive in 2015 and 2014 was due to changes in the company's average stock price.

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