| Document and Entity Information | Sep. 20, 2021 | Oct. 22, 2020 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Sep. 20, 2021 | |
| Entity Registrant Name | HERC HOLDINGS INC. | |
| Entity Incorporation, State or Country Code | DE | |
| Entity File Number | 001-33139 | |
| Entity Tax Identification Number | 20-3530539 | |
| Entity Address, Address Line One | 27500 Riverview Center Blvd | |
| Entity Address, City or Town | Bonita Springs | |
| Entity Address, State or Province | FL | |
| Entity Address, Postal Zip Code | 34134 | |
| City Area Code | 239 | |
| Local Phone Number | 301-1000 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Title of 12(b) Security | Common Stock, par value $0.01 per share | |
| Trading Symbol | HRI | |
| Security Exchange Name | NYSE | |
| Entity Emerging Growth Company | false | |
| Entity Central Index Key | 0001364479 | |
| Amendment Flag | false |
