v3.24.1.1.u2
Provisions And Contingent Liabilities (Narrative) (Details)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2024
CAD ($)
Apr. 30, 2024
USD ($)
Apr. 30, 2023
CAD ($)
Apr. 30, 2024
CAD ($)
Apr. 30, 2023
CAD ($)
Oct. 31, 2023
CAD ($)
Disclosure of Provisions Contingent Liabilities Commitments Guarantees Pledged Assets and Collateral [Line Items]            
Restructuring charges $ 165,000,000   $ 0 $ 456,000,000 $ 0  
Bottom of range [member]            
Disclosure of Provisions Contingent Liabilities Commitments Guarantees Pledged Assets and Collateral [Line Items]            
Bank's reasonable possible losses 0     0   $ 0
Top of range [member]            
Disclosure of Provisions Contingent Liabilities Commitments Guarantees Pledged Assets and Collateral [Line Items]            
Bank's reasonable possible losses 1,310,000,000     $ 1,310,000,000   $ 1,440,000,000
Bank Secrecy Act/anti-money laundering program [member]            
Disclosure of Provisions Contingent Liabilities Commitments Guarantees Pledged Assets and Collateral [Line Items]            
New provisions 615,000,000 $ 450        
Civil matter [member]            
Disclosure of Provisions Contingent Liabilities Commitments Guarantees Pledged Assets and Collateral [Line Items]            
New provisions $ 274,000,000