Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense	$ 4.6	$ 4.3	$ 9.3	$ 9.1

Amortization of intangible assets and cost of sales.

No definition available.

Name:	revg_AmortizationOfIntangibleAssetsAndCostOfSales
Namespace Prefix:	revg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration