v3.22.4
IFRS 7 - Disclosure - Liquidity Risk - Summary of Contractual Maturities of Other Contractual Obligations Affecting Our Funding Needs (Detail) - CAD ($)
$ in Millions
Jan. 31, 2023
Oct. 31, 2022
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations $ 3,625 $ 4,588
Purchase obligations [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 2,151  
Underwriting commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 262  
Future lease commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 569  
Investment commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 529  
Pension contribution [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 114  
Less than 1 month [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 168 1,066
Less than 1 month [member] | Purchase obligations [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 86  
Less than 1 month [member] | Underwriting commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 82  
Later than one months and not later than three months [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 325 193
Later than one months and not later than three months [member] | Purchase obligations [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 136  
Later than one months and not later than three months [member] | Underwriting commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 180  
Later than one months and not later than three months [member] | Investment commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 9  
3 - 6 months [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 274 341
3 - 6 months [member] | Purchase obligations [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 216  
3 - 6 months [member] | Investment commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 1  
3 - 6 months [member] | Pension contribution [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 57  
6 - 9 months [Member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 234 250
6 - 9 months [Member] | Purchase obligations [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 176  
6 - 9 months [Member] | Investment commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 1  
6 - 9 months [Member] | Pension contribution [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 57  
9 - 12 months [Member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 170 220
9 - 12 months [Member] | Purchase obligations [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 169  
9 - 12 months [Member] | Investment commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 1  
1 - 2 years [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 485 597
1 - 2 years [member] | Purchase obligations [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 485  
2 - 5 years [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 795 847
2 - 5 years [member] | Purchase obligations [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 698  
2 - 5 years [member] | Future lease commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 80  
2 - 5 years [member] | Investment commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 17  
Over 5 years [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 1,174 $ 1,074
Over 5 years [member] | Purchase obligations [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 185  
Over 5 years [member] | Future lease commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations 489  
Over 5 years [member] | Investment commitments [member]    
Disclosure Of Other Contractual Obligations [line items]    
Contractual obligations $ 500