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Equity - Summary of Prefered Share Rights and Privileges (Detail)
 12 Months Ended
Oct. 31, 2025
$ / shares
Disclosure of classes of share capital [line items]  
Convertible to In such an event, each preferred share or other equity instrument is convertible into common shares pursuant to an automatic conversion formula and a conversion price based on the greater of: (i) a floor price of $5.00 and (ii) the current market price of our common shares based on the volume weighted-average trading price of our common shares on the TSX.
Class B Series 44 [member]  
Disclosure of classes of share capital [line items]  
Redemption amount $ 25
Reset premium 2.68%
Date redeemable / convertible November 25, 2028
Convertible to Class B – Series 45
Class B Series 44 [member] | Quarterly dividend [Member]  
Disclosure of classes of share capital [line items]  
Non-cumulative dividend $ 0.426
Class B Series 50 [member]  
Disclosure of classes of share capital [line items]  
Redemption amount $ 1,000
Reset premium 4.25%
Date redeemable / convertible November 26, 2027
Convertible to Not convertible
Class B Series 50 [member] | Quarterly dividend [Member]  
Disclosure of classes of share capital [line items]  
Non-cumulative dividend $ 36.865
Class B Series 52 [member]  
Disclosure of classes of share capital [line items]  
Redemption amount $ 1,000
Reset premium 4.25%
Date redeemable / convertible May 26, 2028
Convertible to Not convertible
Class B Series 52 [member] | Quarterly dividend [Member]  
Disclosure of classes of share capital [line items]  
Non-cumulative dividend $ 35.285