v3.26.1
IFRS 7 Disclosure (Market Risk - Portfolio Market Risk Measures) (Details) - CAD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jul. 31, 2026
Apr. 30, 2026
Jul. 31, 2025
Jul. 31, 2026
Jul. 31, 2025
Market Risk [Line Items]          
Total VaR (one-day measure) $ 34.8        
Interest rate risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 11.1        
Credit risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 25.3        
Equity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 17.2        
Currency risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 4.8        
Commodity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 14.3        
Idiosyncratic debt specific risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 19.4        
Risk diversification effect [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) (57.3)        
Average risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 36.7 $ 40.1 $ 36.3 $ 39.6 $ 33.5
Average risk [member] | Interest rate risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 12.7 15.3 9.3 13.5 11.5
Average risk [member] | Credit risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 22.3 19.6 17.3 19.0 19.0
Average risk [member] | Equity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 27.3 17.6 12.5 20.4 10.1
Average risk [member] | Currency risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 5.5 4.1 3.7 4.9 3.9
Average risk [member] | Commodity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 22.1 35.5 30.3 31.4 19.9
Average risk [member] | Idiosyncratic debt specific risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 18.3 17.1 20.4 16.9 21.1
Average risk [member] | Risk diversification effect [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) (71.5) $ (69.1) $ (57.2) $ (66.5) $ (52.0)
High risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 48.5        
High risk [member] | Interest rate risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 18.1        
High risk [member] | Credit risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 28.6        
High risk [member] | Equity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 47.0        
High risk [member] | Currency risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 9.7        
High risk [member] | Commodity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 30.8        
High risk [member] | Idiosyncratic debt specific risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 21.7        
Low risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 28.1        
Low risk [member] | Interest rate risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 9.5        
Low risk [member] | Credit risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 18.0        
Low risk [member] | Equity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 9.7        
Low risk [member] | Currency risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 1.6        
Low risk [member] | Commodity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 12.9        
Low risk [member] | Idiosyncratic debt specific risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) $ 14.4