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Earnings Per Share of Common Stock (Earnings Per Share of Common Stock Reconciliation) (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Earnings Per Share [Line Items] |  |  |  |  |
Income from discontinued operations after income taxes | $ 25 | $ 48 |  | $ 1,997 | $ 219
Earnings Per Share Numerator [Member] |  |  |  |  |
Earnings Per Share [Line Items] |  |  |  |  |
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
Earnings Per Share Denominator [Member] |  |  |  |  |
Earnings Per Share [Line Items] |  |  |  |  |
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 | 7,360,000 | 8,789,000 | [1] | 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.

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- Definition Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 405 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817 + Details
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