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Loans, Impaired Loans, and Allowance for Credit Losses (Narrative) (Details)
$ in Millions, $ in Millions
Mar. 26, 2025
USD ($)
Oct. 31, 2025
CAD ($)
Oct. 31, 2024
CAD ($)
Disclosure of detailed information about financial instruments [line items]      
Foreclosed assets held for sale   $ 101 $ 126
Residential mortgages [member]      
Disclosure of detailed information about financial instruments [line items]      
Proceeds from sale of loans $ 8,600    
Gain (loss) from sale of loans $ 507    
Modified loans [member]      
Disclosure of detailed information about financial instruments [line items]      
Financial assets at amortised cost   $ 210 $ 214
Collateral held against impaired loans   84.00% 82.00%