DEI Document - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2017
Jun. 30, 2017
Document and Entity Information [Abstract]  
Document Type10-K 
Amendment Flagfalse 
Document Period End DateDec. 31, 2017 
Entity Registrant NameDUPONT E I DE NEMOURS & CO 
Entity Central Index Key0000030554 
Current Fiscal Year End Date--12-31 
Document Fiscal Year Focus2017 
Document Fiscal Period FocusFY 
Entity Well-known Seasoned IssuerYes 
Entity Voluntary FilersNo 
Entity Current Reporting StatusYes 
Entity Filer CategoryLarge Accelerated Filer 
Entity Public Float $ 70.0
Entity Common Stock, Shares Outstanding100 

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