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.