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	1 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Dec. 31, 2017	Nov. 02, 2017
DowDuPont [Member]
Related Party Transaction [Line Items]
Accounts Payable, DowDuPont		$ 250	$ 354
Successor [Member]
Related Party Transaction [Line Items]
Stock Repurchase Program, Authorized Amount				$ 4,000
Distributions to DowDuPont	$ 0	2,481
Successor [Member] \| DowDuPont [Member]
Related Party Transaction [Line Items]
Distributions to DowDuPont		$ 2,481