v3.22.4
IFRS 7 - Disclosure - Liquidity Risk - Summary of Credit Related Commitments (Detail) - CAD ($)
$ in Millions
Jan. 31, 2023
Oct. 31, 2022
Disclosure of commitments [line items]    
Credit related commitments $ 426,570 $ 421,510
Unutilized credit commitments [member]    
Disclosure of commitments [line items]    
Credit related commitments 340,766  
Securities lending [member]    
Disclosure of commitments [line items]    
Credit related commitments 52,008  
Standby and performance letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 19,405  
Backstop liquidity facilities [member]    
Disclosure of commitments [line items]    
Credit related commitments 13,135  
Documentary and commercial letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 116  
Other commitments to extend credit [Member]    
Disclosure of commitments [line items]    
Credit related commitments 1,140  
Less than 1 month [member]    
Disclosure of commitments [line items]    
Credit related commitments 49,564 50,694
Less than 1 month [member] | Unutilized credit commitments [member]    
Disclosure of commitments [line items]    
Credit related commitments 1,549  
Less than 1 month [member] | Securities lending [member]    
Disclosure of commitments [line items]    
Credit related commitments 43,216  
Less than 1 month [member] | Standby and performance letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 3,635  
Less than 1 month [member] | Documentary and commercial letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 24  
Less than 1 month [member] | Other commitments to extend credit [Member]    
Disclosure of commitments [line items]    
Credit related commitments 1,140  
Later than one months and not later than three months [member]    
Disclosure of commitments [line items]    
Credit related commitments 16,594 28,841
Later than one months and not later than three months [member] | Unutilized credit commitments [member]    
Disclosure of commitments [line items]    
Credit related commitments 10,392  
Later than one months and not later than three months [member] | Securities lending [member]    
Disclosure of commitments [line items]    
Credit related commitments 4,195  
Later than one months and not later than three months [member] | Standby and performance letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 1,946  
Later than one months and not later than three months [member] | Backstop liquidity facilities [member]    
Disclosure of commitments [line items]    
Credit related commitments 25  
Later than one months and not later than three months [member] | Documentary and commercial letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 36  
3 - 6 months [member]    
Disclosure of commitments [line items]    
Credit related commitments 15,283 13,542
3 - 6 months [member] | Unutilized credit commitments [member]    
Disclosure of commitments [line items]    
Credit related commitments 5,277  
3 - 6 months [member] | Securities lending [member]    
Disclosure of commitments [line items]    
Credit related commitments 4,597  
3 - 6 months [member] | Standby and performance letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 3,553  
3 - 6 months [member] | Backstop liquidity facilities [member]    
Disclosure of commitments [line items]    
Credit related commitments 1,831  
3 - 6 months [member] | Documentary and commercial letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 25  
6 - 9 months [Member]    
Disclosure of commitments [line items]    
Credit related commitments 7,732 10,256
6 - 9 months [Member] | Unutilized credit commitments [member]    
Disclosure of commitments [line items]    
Credit related commitments 4,650  
6 - 9 months [Member] | Standby and performance letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 2,982  
6 - 9 months [Member] | Backstop liquidity facilities [member]    
Disclosure of commitments [line items]    
Credit related commitments 99  
6 - 9 months [Member] | Documentary and commercial letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 1  
9 - 12 months [Member]    
Disclosure of commitments [line items]    
Credit related commitments 22,433 8,415
9 - 12 months [Member] | Unutilized credit commitments [member]    
Disclosure of commitments [line items]    
Credit related commitments 6,139  
9 - 12 months [Member] | Standby and performance letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 5,344  
9 - 12 months [Member] | Backstop liquidity facilities [member]    
Disclosure of commitments [line items]    
Credit related commitments 10,948  
9 - 12 months [Member] | Documentary and commercial letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 2  
1 - 2 years [member]    
Disclosure of commitments [line items]    
Credit related commitments 24,055 22,105
1 - 2 years [member] | Unutilized credit commitments [member]    
Disclosure of commitments [line items]    
Credit related commitments 22,844  
1 - 2 years [member] | Standby and performance letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 975  
1 - 2 years [member] | Backstop liquidity facilities [member]    
Disclosure of commitments [line items]    
Credit related commitments 232  
1 - 2 years [member] | Documentary and commercial letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 4  
2 - 5 years [member]    
Disclosure of commitments [line items]    
Credit related commitments 71,497 68,049
2 - 5 years [member] | Unutilized credit commitments [member]    
Disclosure of commitments [line items]    
Credit related commitments 70,631  
2 - 5 years [member] | Standby and performance letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 842  
2 - 5 years [member] | Documentary and commercial letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 24  
Over 5 years [member]    
Disclosure of commitments [line items]    
Credit related commitments 3,115 2,735
Over 5 years [member] | Unutilized credit commitments [member]    
Disclosure of commitments [line items]    
Credit related commitments 2,987  
Over 5 years [member] | Standby and performance letters of credit [member]    
Disclosure of commitments [line items]    
Credit related commitments 128  
No specific maturity [member]    
Disclosure of commitments [line items]    
Credit related commitments 216,297 $ 216,873
No specific maturity [member] | Unutilized credit commitments [member]    
Disclosure of commitments [line items]    
Credit related commitments $ 216,297