Document and Entity Information - USD ($)	12 Months Ended
	Oct. 31, 2020	Jan. 05, 2021	Apr. 30, 2020
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Oct. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--10-31
Entity File Number	001-37999
Entity Registrant Name	REV Group, Inc.
Entity Central Index Key	0001687221
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-3013415
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
Title of 12(b) Security	Common Stock ($0.001 Par Value)
Trading Symbol	REVG
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
ICFR Auditor Attestation Flag	true
Entity Public Float			$ 167,321,299
Entity Common Stock, Shares Outstanding		63,602,835
Documents Incorporated by Reference	Portions of the Registrant’s Definitive Proxy Statement relating to the Annual Meeting of Stockholders, scheduled to be held on March 4, 2021, are incorporated by reference into Part III of this Report.