EID - Basis of Presentation Narrative (Details) - $ / shares	9 Months Ended
	Sep. 30, 2020	Oct. 29, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 26, 2019	Jun. 01, 2019
EID [Member]
Common Stock, Shares, Outstanding	200		200	200
Common Stock, Par Value	$ 0.30	$ 0.30	$ 0.30	$ 0.30
Common Stock, Shares, Outstanding	747,492,000		748,577,000	748,390,000
Common Stock, Par Value	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Corteva [Member] | EID [Member]
Ownership interest in an entity	100.00%
Corteva [Member]
Common Stock, Shares, Outstanding	747,492,000		748,577,000
Common Stock, Par Value	$ 0.01				$ 0.01	$ 0.01