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Commitments and Contingencies - Schedule of Contingent Liabilities (Detail) - USD ($) $ in Millions | Apr. 30, 2020 | Oct. 31, 2019
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Commitments And Contingencies Disclosure [Abstract] |  |
Performance, bid and specialty bonds | $ 340.0 | $ 229.9
Open standby letters of credit | 10.4 | 14.3
Total | $ 350.4 | $ 244.2

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- Definition Letters Of Credit And Performance Guarantees + References No definition available. + Details
Name: | revg_LettersOfCreditAndPerformanceGuarantees
Namespace Prefix: | revg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Performance bid and specialty bonds. + References No definition available. + Details
Name: | revg_PerformanceBidAndSpecialtyBonds
Namespace Prefix: | revg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant