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Credit Risk (Summary of Gross Maximum Credit Risk Exposure) (Details) - Credit risk [member] - CAD ($)
$ in Millions
Oct. 31, 2025
Oct. 31, 2024
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets $ 1,913,684 $ 1,911,864
Credit exposure 2,771,136 2,729,144
Unconditionally cancellable commitments to extend credit [Member]    
Disclosure of credit risk exposure [line items]    
Credit exposure 468,663 450,574
Amounts receivable from brokers dealers and clients [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 27,345 22,115
Other assets [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 12,318 12,761
Credit instruments [Member]    
Disclosure of credit risk exposure [line items]    
Credit exposure 388,789 366,706
Cash and due from banks [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 7,512 6,437
Interest bearing deposits with banks [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 109,417 169,930
Securities purchased under reverse repurchase agreements [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 247,078 208,217
Derivatives [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 82,972 78,061
Trading loans [member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 30,032 23,518
Residential mortgages [member] | Loans [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 314,706 331,284
Consumer installment and other personal [Member] | Loans [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 256,840 226,333
Credit card [Member] | Loans [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 39,370 38,542
Business and government [member] | Loans [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 342,096 353,390
Loans at fair value through other comprehensive income [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 288 230
Non trading loans at fair value through profit or loss [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 344 3,057
Non trading loans at fair value through profit or loss [Member] | Government and government insured securities [Member] | Securities excluding equity securities [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 333 271
Non trading loans at fair value through profit or loss [Member] | Other debt securities [Member] | Securities excluding equity securities [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 5,346 1,376
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently, category [member] | Government and government insured securities [Member] | Securities excluding equity securities [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 3,473 3,056
Financial assets at fair value through profit or loss, designated upon initial recognition or subsequently, category [member] | Other debt securities [Member] | Securities excluding equity securities [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 3,513 3,361
Trading securities [member] | Government and government insured securities [Member] | Securities excluding equity securities [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 43,957 46,575
Trading securities [member] | Other debt securities [Member] | Securities excluding equity securities [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 23,270 22,482
Trading securities [member] | Retained interest [Member] | Securities excluding equity securities [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 1 1
Financial assets available-for-sale, category [member] | Government and government insured securities [Member] | Securities excluding equity securities [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 101,234 78,422
Financial assets available-for-sale, category [member] | Other debt securities [Member] | Securities excluding equity securities [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 21,800 10,830
Debt securities carried at amortized cost [Member] | Government and government insured securities [Member] | Securities excluding equity securities [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets 182,488 205,098
Debt securities carried at amortized cost [Member] | Other debt securities [Member] | Securities excluding equity securities [Member]    
Disclosure of credit risk exposure [line items]    
Maximum exposure to credit risk of financial assets $ 57,951 $ 66,517