Document and Entity Information - shares	9 Months Ended
	Jul. 31, 2019	Sep. 03, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jul. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--10-31
Entity File Number	001-37999
Trading Symbol	REVG
Entity Registrant Name	REV Group, Inc.
Entity Central Index Key	0001687221
Entity Incorporation, State or Country Name	Delaware
Entity Tax Identification Number	263013415
Entity Address, Address Line One	111 East Kilbourn Avenue
Entity Address, Address Line Two	Suite 2600
Entity Address, City or Town	Milwaukee
Entity Address, State or Province	WI
Entity Address, Postal Zip Code	53202
City Area Code	414
Local Phone Number	290-0190
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		62,207,841