DEI Document - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2018	Jun. 30, 2018
Document and Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Entity Registrant Name	DUPONT E I DE NEMOURS & CO
Entity Central Index Key	0000030554
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Public Float		$ 0.0
Entity Common Stock, Shares Outstanding	100
Entity Small Business	false
Entity Shell Company	false