XML 52 R42.htm IDEA: XBRL DOCUMENT v3.25.2
IFRS 7 - Disclosure - Market Risk - Summary of Incremental Risk Charge (Detail) - CAD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2025
Apr. 30, 2025
Jul. 31, 2024
Jul. 31, 2025
Jul. 31, 2024
Market Risk [line items]          
Total VaR (one-day measure) $ 9.8 $ 10.6 $ 10.7    
Interest rate risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 9.0 6.6 7.4    
Credit spread risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 1.3 1.4 2.6    
Equity risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 9.5 10.0 6.7    
Foreign exchange risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 0.8 1.1 0.8    
Commodity risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 2.5 2.3 3.3    
Diversification effect [member]          
Market Risk [line items]          
Total VaR (one-day measure) (13.3) (10.8) (10.1)    
High [Member]          
Market Risk [line items]          
Total VaR (one-day measure) 15.0        
High [Member] | Interest rate risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 11.9        
High [Member] | Credit spread risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 2.0        
High [Member] | Equity risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 11.6        
High [Member] | Foreign exchange risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 2.8        
High [Member] | Commodity risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 3.2        
Low [Member]          
Market Risk [line items]          
Total VaR (one-day measure) 9.2        
Low [Member] | Interest rate risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 4.3        
Low [Member] | Credit spread risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 1.2        
Low [Member] | Equity risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 7.5        
Low [Member] | Foreign exchange risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 0.6        
Low [Member] | Commodity risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 1.5        
Average risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 11.2 13.8 13.1 $ 11.9 $ 11.8
Average risk [member] | Interest rate risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 7.4 7.0 11.2 7.8 9.8
Average risk [member] | Credit spread risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 1.6 1.6 2.8 1.8 2.5
Average risk [member] | Equity risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 9.5 12.2 6.2 9.8 6.1
Average risk [member] | Foreign exchange risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 1.0 1.1 1.4 1.2 1.3
Average risk [member] | Commodity risk [member]          
Market Risk [line items]          
Total VaR (one-day measure) 2.3 5.0 3.3 3.4 2.8
Average risk [member] | Diversification effect [member]          
Market Risk [line items]          
Total VaR (one-day measure) $ (10.6) $ (13.1) $ (11.8) $ (12.1) $ (10.7)