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Loans, Impaired Loans, and Allowance for Credit Losses (Schedule of Change from Base to Probability-Weighted ECL) (Details) - CAD ($)
$ in Millions
Oct. 31, 2025
Oct. 31, 2024
Disclosure of detailed information about financial instruments [line items]    
Difference - in amount $ 400 $ 399
Expected credit loss rate 5.20% 5.60%
Probability weighted method [member]    
Disclosure of detailed information about financial instruments [line items]    
Probability-weighted ECLs $ 8,137 $ 7,584
Base Scenario [member]    
Disclosure of detailed information about financial instruments [line items]    
Base ECLs $ 7,737 $ 7,185