Stockholders' Equity Noncontrolling Interest (Details) $ in Millions	12 Months Ended
Dec. 31, 2018 USD ($)
Merger with Dow [Member]
Noncontrolling Interest [Line Items]
Noncontrolling interest measurement period adjustments	$ 61

Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Noncontrolling Interest, Fair Value

No definition available.

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Namespace Prefix:	dd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration