XML 75 R61.htm IDEA: XBRL DOCUMENT v3.25.1
Securities - Summary of Allowance for Credit Losses measured at FVOCI and Amortized Cost (Detail) - CAD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2025
Jan. 31, 2025
Apr. 30, 2024
Apr. 30, 2025
Apr. 30, 2024
Disclosure of financial assets [line items]          
Balance at beginning of period $ 4,376 $ 4,455   $ 4,455  
Balance at end of period 4,455 4,376 $ 4,086 4,455 $ 4,086
Debt securities measured at FVOCI [member] | Debt securities [member]          
Disclosure of financial assets [line items]          
Balance at beginning of period 20        
Balance at end of period 18 20 20 18 20
Debt securities measured at FVOCI and amortized cost [member] | Debt securities [member]          
Disclosure of financial assets [line items]          
Balance at beginning of period 37 36 40 36 42
Reversal of credit losses (2) (1) (2) (3) (3)
Foreign exchange and other (2) 2     (1)
Balance at end of period 33 37 38 33 38
Debt securities measured at amortized cost [member] | Debt securities [member]          
Disclosure of financial assets [line items]          
Balance at beginning of period 17        
Balance at end of period 15 17 18 15 18
Stage 1 [member] | Debt securities measured at FVOCI [member] | Financial instruments performing [member] | 12-month expected credit losses [member] | Debt securities [member]          
Disclosure of financial assets [line items]          
Balance at beginning of period 2        
Balance at end of period 2 2 1 2 1
Stage 1 [member] | Debt securities measured at FVOCI and amortized cost [member] | Financial instruments performing [member] | 12-month expected credit losses [member] | Debt securities [member]          
Disclosure of financial assets [line items]          
Balance at beginning of period 7 7 7 7 8
Reversal of credit losses (1)   (1) (1) (1)
Foreign exchange and other         (1)
Balance at end of period 6 7 6 6 6
Stage 1 [member] | Debt securities measured at amortized cost [member] | Financial instruments performing [member] | 12-month expected credit losses [member] | Debt securities [member]          
Disclosure of financial assets [line items]          
Balance at beginning of period 5        
Balance at end of period 4 5 5 4 5
Stage 2 [member] | Debt securities measured at FVOCI [member] | Financial instruments performing [member] | Lifetime expected credit losses [member] | Debt securities [member]          
Disclosure of financial assets [line items]          
Balance at beginning of period 18        
Balance at end of period 16 18 19 16 19
Stage 2 [member] | Debt securities measured at FVOCI and amortized cost [member] | Financial instruments performing [member] | Lifetime expected credit losses [member] | Debt securities [member]          
Disclosure of financial assets [line items]          
Balance at beginning of period 18 17 20 17 20
Reversal of credit losses (1)   (1) (1) (1)
Foreign exchange and other (1) 1      
Balance at end of period 16 18 19 16 19
Stage 3 [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member]          
Disclosure of financial assets [line items]          
Balance at beginning of period 912        
Balance at end of period 913 912 887 913 887
Stage 3 [member] | Debt securities measured at FVOCI and amortized cost [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Debt securities [member]          
Disclosure of financial assets [line items]          
Balance at beginning of period 12 12 13 12 14
Reversal of credit losses   (1)   (1) (1)
Foreign exchange and other (1) 1      
Balance at end of period 11 12 13 11 13
Stage 3 [member] | Debt securities measured at amortized cost [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Debt securities [member]          
Disclosure of financial assets [line items]          
Balance at beginning of period 12        
Balance at end of period $ 11 $ 12 $ 13 $ 11 $ 13