v3.24.3
IFRS 7 Disclosure - Market Risk - Summary of Market Risk VaR and Market Risk SVaR (Detail) - CAD ($)
$ in Millions
Oct. 31, 2024
Oct. 31, 2023
Equity [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR $ 23 $ 10
Foreign exchange [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 6 4
Commodities [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 11 5
Interest rate [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 23 38
Credit specific [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 8 7
Diversification [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR (37) (35)
Market Risk [Member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 34 29
Market risk Stressed VaR 34 121
Weighted average [member] | Equity [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 14 11
Weighted average [member] | Foreign exchange [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 5 3
Weighted average [member] | Commodities [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 6 5
Weighted average [member] | Interest rate [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 30 32
Weighted average [member] | Credit specific [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 8 5
Weighted average [member] | Diversification [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR (34) (31)
Weighted average [member] | Market Risk [Member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 29 25
Market risk Stressed VaR 70 51
Top of range [member] | Equity [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 26 26
Top of range [member] | Foreign exchange [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 10 25
Top of range [member] | Commodities [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 11 8
Top of range [member] | Interest rate [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 44 49
Top of range [member] | Credit specific [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 9 8
Top of range [member] | Market Risk [Member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 41 36
Market risk Stressed VaR 138 127
Bottom of range [member] | Equity [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 6 6
Bottom of range [member] | Foreign exchange [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 2 2
Bottom of range [member] | Commodities [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 4 4
Bottom of range [member] | Interest rate [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 19 20
Bottom of range [member] | Credit specific [member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 7 4
Bottom of range [member] | Market Risk [Member]    
Disclosure of Market Risk VAR [Line Items]    
Trading VaR 20 16
Market risk Stressed VaR $ 26 $ 27