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IFRS 7 - Disclosure - Market Risk - Summary of Amortized Cost and Fair Values of Non-trading Equities (Detail) - CAD ($)
$ in Millions
Oct. 31, 2025
Oct. 31, 2024
Disclosure Of Amortized Cost And Fair Values Of Nontrading Equities [line items]    
Equity-accounted investments in associates $ 144 $ 145
Amortized cost [member] | Non-trading Securities [member]    
Disclosure Of Amortized Cost And Fair Values Of Nontrading Equities [line items]    
Equity securities designated at FVOCI 979 653
Equity-accounted investments in associates 144 145
Total 1,123 798
Financial assets at fair value [member] | Non-trading Securities [member]    
Disclosure Of Amortized Cost And Fair Values Of Nontrading Equities [line items]    
Equity securities designated at FVOCI 1,020 672
Equity-accounted investments in associates 291 253
Total $ 1,311 $ 925