| Document and Entity Information | Sep. 12, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 12, 2023 |
| Entity File Number | 001-37999 |
| Entity Registrant Name | REV Group, Inc. |
| Entity Central Index Key | 0001687221 |
| Entity Tax Identification Number | 26-3013415 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 245 South Executive Drive |
| Entity Address, Address Line Two | Suite 100 |
| Entity Address, City or Town | Brookfield |
| Entity Address, State or Province | WI |
| Entity Address, Postal Zip Code | 53005 |
| City Area Code | 414 |
| Local Phone Number | 290-0190 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock ($0.001 Par Value) |
| Trading Symbol | REVG |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
