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Equity (Narrative) (Details) - CAD ($)
$ / shares in Units, $ in Billions
3 Months Ended 12 Months Ended
Dec. 03, 2025
Oct. 31, 2025
Oct. 31, 2025
Oct. 31, 2024
Feb. 24, 2025
Aug. 28, 2023
Disclosure of classes of share capital [line items]            
Stock repurchase program, number of shares authorized to be repurchased     64,600,000 49,400,000    
Number of shares repurchased price per share     $ 94.29 $ 80.15    
Stock Repurchase Program, Authorized Amount   $ 6.1 $ 6.1 $ 4.0    
Common stock shares authorized to be repurchased           90,000,000
Dividends per common share   $ 1.05 $ 4.20 $ 4.08    
Dividends, payout ratio     50.00% 50.00%    
Number of shares outstanding   1,689,000,000 1,689,000,000 1,750,000,000    
Bottom of range [member]            
Disclosure of classes of share capital [line items]            
Dividends, target payout ratio     40.00%      
Top of range [member]            
Disclosure of classes of share capital [line items]            
Stock Repurchase Program, Authorized Amount         $ 8.0  
Common stock shares authorized to be repurchased         100,000,000  
Dividends, target payout ratio     50.00%      
Non-Cumulative 5-Year Fixed Rate Reset Preferred Shares NVCC, Series 26 [Member] | Limited Recourse Capital Notes [Member]            
Disclosure of classes of share capital [line items]            
Shares For Issue Under NVCC Provisions   1,700,000,000 1,700,000,000      
Dividend Reinvestment Plan [Member] | Bottom of range [member]            
Disclosure of classes of share capital [line items]            
Percentage of discount given to shareholders for reinvestment of dividend into additional common shares     0.00%      
Dividend Reinvestment Plan [Member] | Top of range [member]            
Disclosure of classes of share capital [line items]            
Percentage of discount given to shareholders for reinvestment of dividend into additional common shares     5.00%      
Excluding Non Viability Contingent Capital Series Twenty Six [Member]            
Disclosure of classes of share capital [line items]            
Shares For Issue Under NVCC Provisions   600,000,000 600,000,000      
Non Viability Contingent Capital [Member] | Subordinated Notes And Debentures [Member]            
Disclosure of classes of share capital [line items]            
Shares For Issue Under NVCC Provisions   3,300,000,000 3,300,000,000      
No Discount [Member]            
Disclosure of classes of share capital [line items]            
Percent of discount, from share issuance     0.00% 0.00%    
Major Ordinary Share Transactions [Member]            
Disclosure of classes of share capital [line items]            
Dividends common stock, per share $ 1.08