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EID - Basis of Presentation Narrative (Details) - $ / shares | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2019 | Jun. 01, 2019 | Dec. 31, 2018 | Sep. 30, 2018
Common Stock, Shares, Outstanding | 748,390,000 |  |  |
Common Stock, Par Value | $ 0.01 |  |  |
EID [Member] |  |  |  |
Common Stock, Shares, Outstanding | 200 |  | 100 | 100
Common Stock, Par Value | $ 0.30 |  | $ 0.30 | $ 0.30
Corteva [Member] |  |  |  |
Common Stock, Shares, Outstanding | 748,390,000 | 748,815,000 |  |
Common Stock, Par Value | $ 0.01 |  |  |
Corteva [Member] | EID [Member] |  |  |  |
Ownership interest in an entity | 100.00% |  |  |

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