v3.26.1
Loans and Allowance for Credit Losses - Summary of Gross Carrying Amount of Loans Measured at Amortized Cost - Wholesale (Detail) - Wholesale [member] - Loans outstanding [member] - CAD ($)
$ in Millions
Apr. 30, 2026
Oct. 31, 2025
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment $ 411,192 $ 387,447
Items not subject to impairment 10,922 9,724
Gross carrying amount of financial assets 422,114 397,171
Investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 150,540 132,439
Non investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 238,256 233,638
Not rated [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 15,653 15,217
Impaired [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 6,743 6,153
Stage one loan [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 375,647 352,275
Stage one loan [member] | Investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 148,514 130,322
Stage one loan [member] | Non investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 212,057 207,239
Stage one loan [member] | Not rated [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 15,076 14,714
Stage one loan [member] | Impaired [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 0  
Stage two loan [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 28,802 29,019
Stage two loan [member] | Investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 2,026 2,117
Stage two loan [member] | Non investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 26,199 26,399
Stage two loan [member] | Not rated [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 577 503
Stage two loan [member] | Impaired [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 0  
Stage three loan [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 6,743 6,153
Stage three loan [member] | Investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 0  
Stage three loan [member] | Non investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 0  
Stage three loan [member] | Not rated [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 0  
Stage three loan [member] | Impaired [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment $ 6,743 $ 6,153