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Related Party Transactions Transactions with DowDuPont (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Nov. 02, 2017
Related Party Transaction [Line Items]
Stock Repurchase Program, Authorized Amount							$ 4,000
Payments of Distributions to Affiliates	$ 317	$ 828	$ 830	$ 317	$ 1,658
DowDuPont [Member]
Related Party Transaction [Line Items]
Payments of Distributions to Affiliates				$ 317	1,658
Accounts Payable, Related Parties		$ 391			$ 391	$ 103

X

- Definition

Amount for accounts payable to related parties.

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The distributions of earnings to an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

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