Goodwill and Intangible Assets - Summary of Intangible Assets Excluding Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
Oct. 31, 2018	Oct. 31, 2017
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, gross	$ 137.6	$ 123.9
Less: accumulated amortization	(78.9)	(62.1)
Finite-lived intangible assets, net	58.7	61.8
Indefinite-lived trade names	115.9	106.1
Total intangible assets, net	174.6	167.9
Order Customer Relationships [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, gross	$ 124.7	112.0
Finite-lived intangible assets, useful life	8 years
Order Backlog [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, gross	$ 6.7	4.7
Finite-lived intangible assets, useful life	1 year
Non-compete Agreements [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, gross	$ 2.0	2.0
Finite-lived intangible assets, useful life	5 years
Trade Names [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, gross	$ 3.5	3.5
Finite-lived intangible assets, useful life	7 years
Technology-related Intangible Assets [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, gross	$ 0.7	$ 1.7
Finite-lived intangible assets, useful life	7 years

Intangible assets excluding goodwill.

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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

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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
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-Publisher FASB
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-Section 50
-Paragraph 2
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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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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.

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

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-Topic 350
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