v3.24.1.1.u2
IFRS 7 Disclosure (Market Risk - Portfolio Market Risk Measures) (Details) - CAD ($)
$ in Millions
3 Months Ended 6 Months Ended
Apr. 30, 2024
Jan. 31, 2024
Apr. 30, 2023
Apr. 30, 2024
Apr. 30, 2023
Market Risk [Line Items]          
Total VaR (one-day measure) $ 30.5        
Idiosyncratic debt specific risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 20.1        
Risk diversification effect [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) (56.8)        
Interest rate risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 18.3        
Credit risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 31.1        
Equity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 9.0        
Currency risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 5.0        
Commodity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 3.8        
Average risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 27.9 $ 30.2 $ 49.9 $ 29.0 $ 51.4
Average risk [member] | Idiosyncratic debt specific risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 18.9 20.9 36.0 19.9 37.5
Average risk [member] | Risk diversification effect [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) (52.8) (51.2) (65.9) (51.9) (64.4)
Average risk [member] | Interest rate risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 20.8 17.8 28.6 19.3 26.3
Average risk [member] | Credit risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 26.5 29.4 31.8 27.9 30.5
Average risk [member] | Equity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 7.5 7.2 11.4 7.3 11.0
Average risk [member] | Currency risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 3.1 2.4 4.4 2.7 4.6
Average risk [member] | Commodity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 3.9 $ 3.7 $ 3.6 $ 3.8 $ 5.9
High risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 34.7        
High risk [member] | Idiosyncratic debt specific risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 22.8        
High risk [member] | Interest rate risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 27.7        
High risk [member] | Credit risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 33.1        
High risk [member] | Equity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 9.8        
High risk [member] | Currency risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 7.0        
High risk [member] | Commodity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 6.6        
Low risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 24.0        
Low risk [member] | Idiosyncratic debt specific risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 15.7        
Low risk [member] | Interest rate risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 15.6        
Low risk [member] | Credit risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 18.9        
Low risk [member] | Equity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 5.2        
Low risk [member] | Currency risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) 1.4        
Low risk [member] | Commodity price risk [member]          
Market Risk [Line Items]          
Total VaR (one-day measure) $ 2.2