Related Party Transactions Transactions with DowDuPont (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Related Party Transaction [Line Items]
Distributions to DowDuPont	$ 0	$ 317
DowDuPont [Member]
Related Party Transaction [Line Items]
Distributions to DowDuPont		317
Accounts Payable, Related Parties		$ 103

Amount for accounts payable to related parties.

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