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Earnings Per Share of Common Stock (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Earnings Per Share of Common Stock Reconciliation |
(In millions, except share amounts) | For the Period July 1 - August 31, 2017 | For the Period January 1 - August 31, 2017
Numerator: |  |
(Loss) income from continuing operations after income taxes attributable to DuPont | $ | (263 | ) | $ | 1,624 |
Preferred dividends | (2 | ) | (7 | )
(Loss) income from continuing operations after income taxes available to DuPont common stockholders | (265 | ) | 1,617 |
Income from discontinued operations after income taxes available to DuPont common stockholders | 29 |  | 117 |
Net (loss) income available to common stockholders | $ | (236 | ) | $ | 1,734 |
Denominator: |  |
Weighted-average number of common shares outstanding - Basic | 868,992,000 |  | 867,888,000 |
Dilutive effect of the company’s employee compensation plans 1 | — |  | 4,532,000 |
Weighted-average number of common shares outstanding - Diluted 1 | 868,992,000 |  | 872,420,000 |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] |
| For the Period July 1 - August 31, 2017 | For the Period January 1 - August 31, 2017
Average number of stock options | 4,832,000 |  | 1,906 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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