Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

EID - Basis of Presentation Narrative (Details) - $ / shares	9 Months Ended
	Sep. 30, 2019	Jun. 01, 2019	Dec. 31, 2018	Sep. 30, 2018
Common Stock, Shares, Outstanding	748,390,000
Common Stock, Par Value	$ 0.01
EID [Member]
Common Stock, Shares, Outstanding	200		100	100
Common Stock, Par Value	$ 0.30		$ 0.30	$ 0.30
Corteva [Member]
Common Stock, Shares, Outstanding	748,390,000	748,815,000
Common Stock, Par Value	$ 0.01
Corteva [Member] \| EID [Member]
Ownership interest in an entity	100.00%