Divestitures and Other Transactions Integration and Separation Costs (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Integration and Separation Costs [Abstract]
Integration and Separation Costs	$ 405	$ 255

Integration and separation costs includes costs incurred to prepare for and close the Merger, post-Merger integration expenses and costs incurred to prepare for the Intended Business Separations. These costs primarily consist of financial advisory, information technology, legal, accounting, consulting and other professional advisory fees associated with preparation and execution of these activities.

No definition available.

Name:	dd_BusinessCombinationIntegrationAndSeparationRelatedCosts
Namespace Prefix:	dd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration