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Divestitures and Other Transactions - Performance Coatings, GLS/Vinyls, Performance Chemicals (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 1 Months Ended | 12 Months Ended | 3 Months Ended
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Feb. 28, 2013 | Dec. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014
Performance Coatings [Member] | Discontinued Operations [Member] |  |  |  |  |  |  |
Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Proceeds from sale of business, after-tax | $ 4,200 dd_ProceedsFromSaleOfBusinessAfterTax / dd_DivestituresandOtherTransactionsAxis = dd_PerformanceCoatingsMember / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |  |  |  |  |  |
Pre-tax gain on sale of discontinued operation |  | 2,687 us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax / dd_DivestituresandOtherTransactionsAxis = dd_PerformanceCoatingsMember / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |  |  |  |  |
After tax gain on sale of discontinued operation |  | 1,962 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / dd_DivestituresandOtherTransactionsAxis = dd_PerformanceCoatingsMember / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = us-gaap_SegmentDiscontinuedOperationsMember |  |  |  |  |
GLS/Vinyls [Member] |  |  |  |  |  |  |
Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Pre-tax gain on sale of business, continuing operations |  |  | 391 us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal / dd_DivestituresandOtherTransactionsAxis = dd_GLSVinylsMember |  |  |  |
After-tax gain on sale of business, continuing operations |  |  | 273 dd_DisposalGroupNotDiscontinuedOperationGainLossonDisposalNetoftax / dd_DivestituresandOtherTransactionsAxis = dd_GLSVinylsMember |  |  |  |
Performance Chemicals [Member] |  |  |  |  |  |  |
Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Separation related transaction costs |  |  | $ 175 dd_Separationrelatedtransactioncosts / dd_DivestituresandOtherTransactionsAxis = dd_PerformanceChemicalsMember | $ 63 dd_Separationrelatedtransactioncosts / dd_DivestituresandOtherTransactionsAxis = dd_PerformanceChemicalsMember | $ 61 dd_Separationrelatedtransactioncosts / dd_DivestituresandOtherTransactionsAxis = dd_PerformanceChemicalsMember | $ 35 dd_Separationrelatedtransactioncosts / dd_DivestituresandOtherTransactionsAxis = dd_PerformanceChemicalsMember | $ 16 dd_Separationrelatedtransactioncosts / dd_DivestituresandOtherTransactionsAxis = dd_PerformanceChemicalsMember

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