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 |
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Related Party Transaction [Line Items] | ||||||
Distributions to DowDuPont | $ 317 | $ 0 | $ 317 | [1] | ||
DowDuPont [Member] | ||||||
Related Party Transaction [Line Items] | ||||||
Distributions to DowDuPont | $ 317 | |||||
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