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Goodwill and Intangible Assets - Summary of Change in Net Carrying Value of Goodwill (Detail) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Balance at beginning of period	$ 157.3	$ 157.3
Divestiture (Note 7)	(18.6)	0.0
Balance at end of period	$ 138.7	$ 157.3

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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