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Earnings Per Share of Common Stock (Earnings Per Share of Common Stock Reconciliation) (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Earnings Per Share [Abstract] |  |  |
Income from continuing operations after income taxes attributable to DuPont | $ 3,610 us-gaap_IncomeLossFromContinuingOperations | $ 2,849 us-gaap_IncomeLossFromContinuingOperations | $ 2,447 us-gaap_IncomeLossFromContinuingOperations
Preferred dividends | (10)us-gaap_DividendsPreferredStock | (10)us-gaap_DividendsPreferredStock | (10)us-gaap_DividendsPreferredStock
Income from continuing operations after income taxes available to DuPont common shareholders | 3,600 dd_IncomeFromContinuingOperationsAfterIncomeTaxesAvailableToCommonStockholders | 2,839 dd_IncomeFromContinuingOperationsAfterIncomeTaxesAvailableToCommonStockholders | 2,437 dd_IncomeFromContinuingOperationsAfterIncomeTaxesAvailableToCommonStockholders
Income from discontinued operations after income taxes | 15 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | 1,999 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity | 308 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Net income available to common stockholders | $ 3,615 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 4,838 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 2,745 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Weighted-average number of common shares outstanding - Basic | 914,752 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 925,984 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 933,275 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Dilutive effect of the company's equity compensation plans | 7,121 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 7,163 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 8,922 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Weighted average number of common shares outstanding - Diluted | 921,873 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 933,147 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 942,197 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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- Definition Income From Continuing Operations After Income Taxes (attributable to the Parent) Available to Common Stockholders + References No definition available. + Details
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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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- Definition Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4613673-111683 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.13) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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- Definition Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683 + Details
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- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 28A -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1500-109256 + Details
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- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1377-109256 + Details
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