v3.26.1
Provisions and Contingent Liabilities (Narrative) (Details)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2026
CAD ($)
Apr. 30, 2025
CAD ($)
Apr. 30, 2026
CAD ($)
Apr. 30, 2026
USD ($)
Apr. 30, 2025
CAD ($)
Apr. 30, 2026
USD ($)
Oct. 31, 2025
CAD ($)
Disclosure of credit risk exposure [line items]              
Restructuring charges $ (6,000,000) $ 163,000,000 $ 194,000,000   $ 163,000,000    
Department Of Justice, Criminal Division, Money Laundering And Asset Recovery Section And The United States Attorney's Office For The District Of New Jersey [Member]              
Disclosure of credit risk exposure [line items]              
Litigation settlement amount settled with counter party     $ 4,233,000,000 $ 3,088      
Prohibition against average combined total assets of subsidiaries           $ 434,000  
Percent of limit deduction, if subsidiary does not meet deadline 7.00%   7.00%     7.00%  
Period to file appeal after decision     30 days 30 days      
Bottom of range [member] | Legal And Regulatory Matters [Member]              
Disclosure of credit risk exposure [line items]              
Bank's reasonable possible losses $ 0   $ 0       $ 0
Top of range [member] | Legal And Regulatory Matters [Member]              
Disclosure of credit risk exposure [line items]              
Bank's reasonable possible losses $ 456,800,000   $ 456,800,000       $ 440,700,000