v3.22.4
Loans - Summary of Carrying Amount of Loans Based on Internal Risk Rating Grades (Detail) - CAD ($)
$ in Millions
 3 Months Ended
Jan. 31, 2023
Oct. 31, 2022
Jan. 31, 2022
Disclosure of internal credit grades [line items]      
Gross residential mortgages $ 270,909 $ 269,706  
ECL allowance 3,159 3,073 $ 2,838
Net loans 531,306 528,657  
Gross personal 44,877 45,429  
Gross credit card 16,171 16,479  
Gross business and government 202,508 200,116  
Exceptionally Low [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 171,681 174,889  
Gross personal 18,254 18,944  
Gross credit card 3,345 3,151  
Very Low [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 57,900 54,293  
Gross personal 4,543 6,124  
Gross credit card 1,054 1,042  
Low [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 31,128 31,016  
Gross personal 15,654 14,070  
Gross credit card 7,201 7,533  
Medium [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 5,877 5,188  
Gross personal 4,172 4,018  
Gross credit card 3,791 3,919  
High [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 920 906  
Gross personal 1,334 1,355  
Gross credit card 631 682  
Default [member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 443 374  
Gross personal 184 175  
Gross business and government 1,042 920  
Not Rated [member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 2,960 3,040  
Gross personal 736 743  
Gross credit card 149 152  
Gross business and government 254 225  
Investment grade [member]      
Disclosure of internal credit grades [line items]      
Gross business and government 98,905 87,588  
Non investment grade [member]      
Disclosure of internal credit grades [line items]      
Gross business and government 98,497 108,346  
Watch list [member]      
Disclosure of internal credit grades [line items]      
Gross business and government 3,810 3,037  
Residential mortgages [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 308 293  
Net loans 270,601 269,413  
Personal [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 896 902  
Net loans 43,981 44,527  
Credit card [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 757 784  
Net loans 15,414 15,695  
Business and government [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 1,198 1,094  
Net loans 201,310 199,022  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 253,375 255,609  
ECL allowance 563 600 545
Net loans 492,724 492,658  
Gross personal 37,387 36,036  
Gross credit card 12,690 12,266  
Gross business and government 189,835 189,347  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Exceptionally Low [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 171,504 174,749  
Gross personal 18,252 18,943  
Gross credit card 3,345 3,151  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Very Low [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 57,279 53,795  
Gross personal 4,524 6,119  
Gross credit card 1,054 1,042  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Low [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 21,915 24,200  
Gross personal 12,729 9,117  
Gross credit card 7,058 6,936  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Medium [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 165 261  
Gross personal 1,009 934  
Gross credit card 1,082 992  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | High [Member]      
Disclosure of internal credit grades [line items]      
Gross personal 231 266  
Gross credit card 9    
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Not Rated [member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 2,512 2,604  
Gross personal 642 657  
Gross credit card 142 145  
Gross business and government 238 208  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Investment grade [member]      
Disclosure of internal credit grades [line items]      
Gross business and government 98,280 87,184  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Non investment grade [member]      
Disclosure of internal credit grades [line items]      
Gross business and government 91,258 101,889  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Watch list [member]      
Disclosure of internal credit grades [line items]      
Gross business and government 59 66  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Residential mortgages [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 58 57  
Net loans 253,317 255,552  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Personal [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 121 115  
Net loans 37,266 35,921  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Credit card [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 127 143  
Net loans 12,563 12,123  
Stage 1 [member] | Financial instruments not credit-impaired [member] | 12-month expected credit losses [member] | Business and government [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 257 285  
Net loans 189,578 189,062  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 16,871 13,501  
ECL allowance 1,859 1,809 1,497
Net loans 37,377 34,920  
Gross personal 7,253 9,166  
Gross credit card 3,481 4,213  
Gross business and government 11,631 9,849  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Exceptionally Low [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 177 140  
Gross personal 2 1  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Very Low [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 621 498  
Gross personal 19 5  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Low [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 9,213 6,816  
Gross personal 2,925 4,953  
Gross credit card 143 597  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Medium [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 5,712 4,927  
Gross personal 3,163 3,084  
Gross credit card 2,709 2,927  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | High [Member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 920 906  
Gross personal 1,103 1,089  
Gross credit card 622 682  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Not Rated [member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 228 214  
Gross personal 41 34  
Gross credit card 7 7  
Gross business and government 16 17  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Investment grade [member]      
Disclosure of internal credit grades [line items]      
Gross business and government 625 404  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Non investment grade [member]      
Disclosure of internal credit grades [line items]      
Gross business and government 7,239 6,457  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Watch list [member]      
Disclosure of internal credit grades [line items]      
Gross business and government 3,751 2,971  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Residential mortgages [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 80 69  
Net loans 16,791 13,432  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Personal [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 618 641  
Net loans 6,635 8,525  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Credit card [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 630 641  
Net loans 2,851 3,572  
Stage 2 [member] | Financial instruments not credit-impaired [member] | Lifetime expected credit losses [member] | Business and government [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 531 458  
Net loans 11,100 9,391  
Stage 3 [member] | Financial instruments credit-impaired [member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 663 596  
Net loans 1,205 1,079  
Gross personal 237 227  
Gross business and government 1,042 920  
Stage 3 [member] | Financial instruments credit-impaired [member] | Default [member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 443 374  
Gross personal 184 175  
Gross business and government 1,042 920  
Stage 3 [member] | Financial instruments credit-impaired [member] | Not Rated [member]      
Disclosure of internal credit grades [line items]      
Gross residential mortgages 220 222  
Gross personal 53 52  
Stage 3 [member] | Financial instruments credit-impaired [member] | Residential mortgages [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 170 167  
Net loans 493 429  
Stage 3 [member] | Financial instruments credit-impaired [member] | Personal [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 157 146  
Net loans 80 81  
Stage 3 [member] | Financial instruments credit-impaired [member] | Business and government [member]      
Disclosure of internal credit grades [line items]      
ECL allowance 410 351  
Net loans 632 569  
Stage 3 [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member]      
Disclosure of internal credit grades [line items]      
ECL allowance $ 737 $ 664 $ 796