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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense	$ 3.4	$ 4.6	$ 7.4	$ 9.3

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- Definition

Amortization of intangible assets and cost of sales.

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

Name:	us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration