Goodwill and Intangible Assets - Summary of Intangible Assets Excluding Goodwill (Detail) - USD ($) $ in Millions	6 Months Ended
Apr. 30, 2019	Oct. 31, 2018
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, gross	$ 139.6	$ 137.6
Less: accumulated amortization	(87.8)	(78.9)
Finite-lived intangible assets, net	51.8	58.7
Indefinite-lived trade names	115.9	115.9
Total intangible assets, net	$ 167.7	174.6
Customer Relationships [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, Weighted-Average Life	8 years
Finite-lived intangible assets, gross	$ 126.7	124.7
Order Backlog [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, Weighted-Average Life	1 year
Finite-lived intangible assets, gross	$ 6.7	6.7
Non-compete Agreements [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, Weighted-Average Life	5 years
Finite-lived intangible assets, gross	$ 2.0	2.0
Trade Names [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, Weighted-Average Life	7 years
Finite-lived intangible assets, gross	$ 3.5	3.5
Technology-related Intangible Assets [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, Weighted-Average Life	7 years
Finite-lived intangible assets, gross	$ 0.7	$ 0.7

Finite-lived intangible assets, weighted average useful life.

No definition available.

Name:	revg_FiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	revg_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Intangible assets excluding goodwill.

+ References

No definition available.

+ Details

Name:	revg_IntangibleAssetsExcludingGoodwillLineItems
Namespace Prefix:	revg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the rights acquired through registration of a trade name to gain or protect exclusive use thereof for a projected indefinite period of benefit.

+ References

+ Details

Name:	us-gaap_IndefiniteLivedTradeNames
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph ((a)(1),(b))
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

+ Details

Name:	us-gaap_IntangibleAssetsNetExcludingGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_OrderOrProductionBacklogMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TechnologyBasedIntangibleAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: