| Document and Entity Information | Feb. 17, 2020 |
| Cover [Abstract] | |
| Entity Registrant Name | DUPONT E I DE NEMOURS & CO |
| Amendment Flag | false |
| Entity Central Index Key | 0000030554 |
| Document Type | 8-K |
| Document Period End Date | Feb. 17, 2020 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-38196 |
| Entity Tax Identification Number | 81-1224539 |
| Entity Address, Address Line One | 974 Centre Road |
| Entity Address, Address Line Two | Building 730 Wilmington |
| Entity Address, City or Town | Wilmington |
| Entity Address, State or Province | DE |
| Entity Address, Postal Zip Code | 19805 |
| City Area Code | (302) |
| Local Phone Number | 774-1000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, par value $0.01 per share |
| Trading Symbol | DD |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
