| 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, | | 2017 | 2016 | 2017 | 2016 | Numerator: | | | | | Income from continuing operations after income taxes attributable to DuPont | $ | 852 |
| $ | 1,023 |
| $ | 2,182 |
| $ | 2,246 |
| Preferred dividends | (3 | ) | (3 | ) | (5 | ) | (5 | ) | Income from continuing operations after income taxes available to DuPont common stockholders | $ | 849 |
| $ | 1,020 |
| $ | 2,177 |
| $ | 2,241 |
| | | | | | Income (loss) from discontinued operations after income taxes available to DuPont common stockholders | $ | 10 |
| $ | (3 | ) | $ | (207 | ) | $ | — |
| | | | | | Net income available to common stockholders | $ | 859 |
| $ | 1,017 |
| $ | 1,970 |
| $ | 2,241 |
| | | | | | Denominator: | | | | | Weighted-average number of common shares outstanding - Basic | 868,481,000 |
| 875,013,000 |
| 867,496,000 |
| 874,269,000 |
| Dilutive effect of the company’s employee compensation plans | 4,269,000 |
| 4,166,000 |
| 4,424,000 |
| 3,945,000 |
| Weighted-average number of common shares outstanding - Diluted | 872,750,000 |
| 879,179,000 |
| 871,920,000 |
| 878,214,000 |
|
The following average number of stock options were antidilutive, and therefore not included in the dilutive earnings per share calculations: | | | | | | | | | | | Three Months Ended | Six Months Ended | | June 30, | June 30, | | 2017 | 2016 | 2017 | 2016 | Average number of stock options | — |
| 4,994,000 |
| 3,000 |
| 5,049,000 |
|
The change in the average number of stock options that were antidilutive in the three and six months ended June 30, 2017, compared to the same period last year was due to changes in the company's average stock price. |