v3.26.1
Loans and Allowance for Credit Losses - Summary of Gross Carrying Amount of Loans Measured at Amortized Cost - Personal (Detail) - Personal [member] - Retail loans [member] - CAD ($)
$ in Millions
Jul. 31, 2026
Oct. 31, 2025
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment $ 121,939 $ 115,345
Low risk [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 73,581 90,248
Medium risk [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 5,517 7,803
High risk [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 3,850 3,184
Not rated [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 38,547 13,673
Impaired [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 444 437
Stage one loan [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 110,593 104,665
Stage one loan [member] | Low risk [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 71,701 87,536
Stage one loan [member] | Medium risk [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 3,971 4,035
Stage one loan [member] | High risk [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 648 601
Stage one loan [member] | Not rated [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 34,273 12,493
Stage two loan [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 10,902 10,243
Stage two loan [member] | Low risk [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 1,880 2,712
Stage two loan [member] | Medium risk [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 1,546 3,768
Stage two loan [member] | High risk [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 3,202 2,583
Stage two loan [member] | Not rated [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 4,274 1,180
Stage three loan [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 444 437
Stage three loan [member] | Impaired [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment $ 444 $ 437