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Earnings Per Share of Common Stock | 9 Months Ended
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Sep. 30, 2013
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 (loss) per share calculations for the periods indicated:
| Three Months Ended | Nine Months Ended
| September 30, | September 30,
| 2013 | 2012 | 2013 | 2012
Numerator: |  |  |  |
Income (loss) from continuing operations after income taxes attributable to DuPont | $ | 260 |  | $ | (43 | ) | $ | 2,666 |  | $ | 2,444 |
Preferred dividends | (3 | ) | (3 | ) | (8 | ) | (8 | )
Income (loss) from continuing operations after income taxes available to DuPont common stockholders | $ | 257 |  | $ | (46 | ) | $ | 2,658 |  | $ | 2,436 |
Income from discontinued operations after income taxes | $ | 25 |  | $ | 48 |  | $ | 1,997 |  | $ | 219 |
Net income available to common stockholders | $ | 282 |  | $ | 2 |  | $ | 4,655 |  | $ | 2,655 |
Denominator: |  |  |  |
Weighted-average number of common shares outstanding - Basic | 925,645,000 |  | 931,737,000 |  | 925,548,000 |  | 933,227,000 |
Dilutive effect of the company’s employee compensation plans 1 | 7,360,000 |  | 8,789,000 |  | 6,994,000 |  | 9,297,000 |
Weighted-average number of common shares outstanding - Diluted | 933,005,000 |  | 940,526,000 |  | 932,542,000 |  | 942,524,000 |
1 | Dilutive effect of the company's employee compensation plans are excluded from calculation of dilutive loss per share of common stock from continuing operations for the three months ended September 30, 2012.
The following average number of stock options were antidilutive, and therefore, were not included in the diluted earnings per share calculations:
| Three Months Ended | Nine Months Ended
| September 30, | September 30,
| 2013 | 2012 | 2013 | 2012
Average number of stock options | — |  | 12,631,000 |  | 3,461,000 |  | 12,035,000 |
The change in the average number of stock options that were antidilutive in the three and nine months ended September 30, 2013 compared to the same period last year was primarily due to changes in the company’s average stock price.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1278-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=32703322&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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