| Document and Entity Information | Jan. 12, 2020 |
| Cover [Abstract] | |
| Entity Registrant Name | HEXCEL CORP /DE/ |
| Amendment Flag | false |
| Entity Central Index Key | 0000717605 |
| Document Type | 8-K |
| Document Period End Date | Jan. 12, 2020 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-8472 |
| Entity Tax Identification Number | 94-1109521 |
| Entity Address, Address Line One | Two Stamford Plaza |
| Entity Address, Address Line Two | 281 Tresser Boulevard |
| Entity Address, City or Town | Stamford |
| Entity Address, State or Province | CT |
| Entity Address, Postal Zip Code | 06901-3238 |
| City Area Code | (203) |
| Local Phone Number | 969-0666 |
| Written Communications | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock |
| Trading Symbol | HXL |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
