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Related Party Transactions Transactions with DowDuPont (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Related Party Transaction [Line Items] |  |  |  |
Distributions to DowDuPont | $ 317 | $ 0 | $ 317 | [1]
DowDuPont [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Distributions to DowDuPont |  |  | $ 317 |
[1] | The cash flows for the nine months ended September 30, 2019 includes cash flows of EID's ECP and Specialty Products Entities.

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