v3.26.1
Loans and Allowance for Credit Losses - Summary of Gross Carrying Amount of Loans Measured at Amortized Cost - Undrawn Loan Commitments Wholesale (Detail) - Wholesale [member] - Undrawn loan commitments [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 $ 616,168 $ 594,569
Investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 411,897 394,760
Non investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 202,033 198,381
Not rated [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 2,238 1,428
Stage one exposure [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 593,424 576,797
Stage one exposure [member] | Investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 410,317 393,167
Stage one exposure [member] | Non investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 180,908 182,223
Stage one exposure [member] | Not rated [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 2,199 1,407
Stage two exposure [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 22,744 17,772
Stage two exposure [member] | Investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 1,580 1,593
Stage two exposure [member] | Non investment grade [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment 21,125 16,158
Stage two exposure [member] | Not rated [member]    
Disclosure of credit risk exposure [line items]    
Gross carrying amount of financial assets subject to impairment $ 39 $ 21