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Earnings Per Share of Common Stock (Earnings Per Share of Common Stock Reconciliation) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Earnings Per Share [Abstract] |  |  |  |
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) | 0
Net income available to common stockholders | $ 859 | $ 1,017 | $ 1,970 | $ 2,241
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

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