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Transfers of Financial Assets (Narrative) (Details) - CAD ($)
$ in Millions
12 Months Ended
Oct. 31, 2025
Oct. 31, 2024
Retained interest [Member]    
Disclosure of continuing involvement in derecognised financial assets [line items]    
Fair value of financial assets the Bank has continuing involvement $ 1 $ 1
US residential mortgages originated by bank [member] | Servicing rights [member]    
Disclosure of continuing involvement in derecognised financial assets [line items]    
Fair value of financial assets the Bank has continuing involvement 139 133
Carrying value of assets the Bank has continuing involvement 75 81
Gain or loss on sale of the loans $ (25) $ (3)