Amount for accounts payable to related parties.

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Name:	us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Related Parties Transactions with DowDuPont (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2017	Aug. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Jun. 26, 2019	Nov. 02, 2017
Related Party Transaction [Line Items]
Stock Repurchase Program, Authorized Amount					$ 1,000	$ 4,000
Distributions to DowDuPont	$ (1,200)		$ (317)	$ (2,806)
DowDuPont [Member]
Related Party Transaction [Line Items]
Distributions to DowDuPont	$ 829		$ 317	2,806
Accounts Payable, Related Parties				$ 103