Goodwill and Intangible Assets - Summary of Intangible Assets Excluding Goodwill (Detail) - USD ($) $ in Millions	Jul. 31, 2024	Oct. 31, 2023
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived Customer Relationships, accumulated amortization	$ (16.8)	$ (35.4)
Indefinite-lived trade names	89.4	107.4
Total intangible assets, gross	112.7	151.1
Total intangible assets, net	95.9	115.7
Customer Relationships [Member]
Intangible Assets Excluding Goodwill [Line Items]
Finite-lived Customer Relationships, gross	23.3	43.7
Finite-lived Customer Relationships, accumulated amortization	(16.8)	(35.4)
Finite-lived Customer Relationships, net	$ 6.5	$ 8.3