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Related Party Transactions Dow Intercompany Transactions (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2019 USD ($)
Dow [Member] |
Related Party Transaction [Line Items] |
Purchases from Historical Dow and affiliates | $ 42

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=dd_DowMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |