Goodwill and Intangible Assets - Summary of Intangible Assets Excluding Goodwill (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Jul. 31, 2023	Oct. 31, 2022
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, accumulated amortization	$ (34.9)	$ (31.9)
Indefinite-lived trade names	107.4	107.4
Total intangible assets, gross	151.1	151.1
Total intangible assets, net	$ 116.2	$ 119.2
Customer Relationships [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived intangible assets, Weighted-Average Life	8 years	8 years
Finite-lived intangible assets, gross	$ 43.7	$ 43.7
Finite-lived intangible assets, accumulated amortization	(34.9)	(31.9)
Finite-lived intangible assets, net	$ 8.8	$ 11.8

Intangible assets excluding goodwill.

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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.

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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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- 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.

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Amount before accumulated amortization of intangible assets, excluding goodwill.

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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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