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Summary of Significant Accounting Policies - Segment Information - Additional Information (Detail) - USD ($) $ in Millions	Oct. 31, 2025	Oct. 31, 2024
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets held	$ 7.2	$ 0.4
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets held	$ 3.0	$ 2.5

X

- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-41

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Details

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X

- Details

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