Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Related Party Transactions Dow Intercompany Transactions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Dow [Member]
Related Party Transaction [Line Items]
Purchases from Historical Dow and affiliates				$ 42
Corteva [Member] \| EID [Member]
Related Party Transaction [Line Items]
Interest Expense, Related Party	$ 19	$ 39	$ 82	$ 69