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Transfers of Financial Assets - Summary of Carrying Value and Fair Value of Transferred Assets That Did Not Qualify for Derecognition and Associated Liabilities Relating to Loan Securitizations (Detail) - CAD ($)
$ in Millions
Oct. 31, 2025
Oct. 31, 2024
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]    
Carrying value of assets $ 17,299 $ 16,335
Fair Value 17,209 16,118
Carrying value of associated liabilities 16,977 15,790
Fair Value 16,815 15,598
Trading securities [member]    
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]    
Carrying value of assets 22 106
Fair Value 0  
Loans [member]    
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]    
Carrying value of assets 10,525 9,277
Fair Value 0  
Other related assets [member]    
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]    
Carrying value of assets 6,752 $ 6,952
Fair Value $ 0