Goodwill and Intangible Assets - Summary of Net Carrying Value of Indefinite-lived Trade Names (Detail) - Trade Names [Member] - USD ($) $ in Millions	6 Months Ended
Apr. 30, 2024	Apr. 30, 2023
Indefinite-Lived Intangible Assets [Line Items]
Balance at beginning of period	$ 107.4	$ 107.4
Impairment (Note 8)	(7.2)
Divestiture (Note 7)	(8.9)	0.0
Balance at end of period	$ 91.3	$ 107.4

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482665/350-30-50-3

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
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-URI https://asc.fasb.org//1943274/2147482665/350-30-50-2

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Amount of divestiture of an asset lacking physical substance and having a projected indefinite period of benefit to fair value. Excludes financial assets and goodwill.

+ References

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