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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

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