Document and Entity Information - shares	9 Months Ended
	Jul. 31, 2020	Sep. 04, 2020
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jul. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--10-31
Entity File Number	001-37999
Trading Symbol	REVG
Title of 12(b) Security	Common Stock ($0.001 Par Value)
Security Exchange Name	NYSE
Entity Registrant Name	REV Group, Inc.
Entity Central Index Key	0001687221
Entity Incorporation, State or Country Name	DE
Entity Tax Identification Number	26-3013415
Entity Address, Address Line One	245 South Executive Drive
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
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		63,476,203
Document Transition Report	false
Document Quarterly Report	true