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Related Party Transactions (Notes)	9 Months Ended
Related Party Transactions (Notes)	Sep. 30, 2020
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	RELATED PARTIES Services Provided by and to Historical Dow and its affiliates Following the Merger and prior to the Dow Distribution, Corteva reported transactions with Historical Dow and its affiliates as related party transactions. Purchases from Historical Dow and its affiliates were $42 million for the nine months ended September 30, 2019. Transactions with DowDuPont Following the Merger and prior to the Corteva Distribution, Corteva reported transactions with DowDuPont as related party transactions. In February 2019, the DowDuPont Board declared first quarter dividends per share of DowDuPont common stock payable on March 15, 2019. EID declared and paid distributions to DowDuPont of $317 million for the nine months ended September 30, 2019, primarily to fund a portion of DowDuPont's dividend payment.