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Significant Accounting Policies - Narrative (Detail) - ASU 2019-12 [Member]
Oct. 31, 2021
Summary Of Significant Accounting Policies [Line Items]  
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true
Change in Accounting Principle, Accounting Standards Update, Adoption Date May 03, 2021
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] true