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Divestitures and Other Transactions Divestitures and Other Transactions - Integration and Separation Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Discontinued Operations and Disposal Groups [Abstract] |  |  |  |
Integration and Separation Costs | $ 152 | $ 253 | $ 694 | $ 697

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- Definition Integration and separation costs includes costs incurred to prepare for and close the Merger, post-Merger integration expenses and costs incurred to prepare for the Intended Business Separations. These costs primarily consist of financial advisory, information technology, legal, accounting, consulting and other professional advisory fees associated with preparation and execution of these activities. + References No definition available. + Details
Name: | dd_BusinessCombinationIntegrationAndSeparationRelatedCosts
Namespace Prefix: | dd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration