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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
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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