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Loans, Impaired Loans and Allowance for Credit Losses - Impaired Loans (Detail) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
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Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | $ 778,508 | $ 767,365
Allowance for credit losses |  | 7,463 | 6,536
Net |  | 771,045 | 760,829
Canada [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 531,999 | 523,361
United States [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 62,136 | 59,246
Mexico [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 45,696 | 44,190
Peru [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 22,043 | 21,038
Chile [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 51,111 | 49,159
Colombia [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 13,290 | 11,346
Other International [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 52,233 | 59,025
Residential mortgages [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans |  | 370,191 | 350,941
Allowance for credit losses |  | 1,460 | 1,208
Net |  | 368,731 | 349,733
Residential mortgages [member] | Canada [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 312,131 | 297,677
Residential mortgages [member] | Mexico [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 18,980 | 16,749
Residential mortgages [member] | Peru [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 4,625 | 4,113
Residential mortgages [member] | Chile [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 21,739 | 20,410
Residential mortgages [member] | Colombia [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 2,384 | 2,196
Residential mortgages [member] | Other International [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 10,332 | 9,796
Personal loans [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans |  | 110,567 | 106,379
Allowance for credit losses |  | 2,432 | 2,319
Net |  | 108,135 | 104,060
Personal loans [member] | Canada [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 82,764 | 82,892
Personal loans [member] | United States [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 5,965 | 4,009
Personal loans [member] | Mexico [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 3,436 | 2,615
Personal loans [member] | Peru [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 5,801 | 5,623
Personal loans [member] | Chile [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 5,125 | 4,868
Personal loans [member] | Colombia [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 2,885 | 2,186
Personal loans [member] | Other International [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 4,591 | 4,186
Business and government [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans |  | 279,705 | 292,671
Allowance for credit losses |  | 2,216 | 1,849
Net |  | 277,489 | 290,822
Business and government [member] | Canada [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 128,086 | 133,810
Business and government [member] | United States [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 56,171 | 55,237
Business and government [member] | Mexico [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 22,232 | 23,994
Business and government [member] | Peru [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 11,125 | 10,545
Business and government [member] | Chile [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 20,171 | 20,330
Business and government [member] | Colombia [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 6,481 | 5,518
Business and government [member] | Other International [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [1] | 35,439 | 43,237
Financial instruments credit-impaired [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [2] | 7,244 | 6,739
Allowance for credit losses | [2] | 2,341 | 2,054
Net | [2] | 4,903 | 4,685
Financial instruments credit-impaired [member] | Canada [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [2] | 2,416 | 2,158
Allowance for credit losses | [2] | 683 | 569
Net | [2] | 1,733 | 1,589
Financial instruments credit-impaired [member] | United States [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [2] |  | 109
Allowance for credit losses | [2] |  | 22
Net | [2] |  | 87
Financial instruments credit-impaired [member] | Mexico [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [2] | 1,494 | 1,343
Allowance for credit losses | [2] | 535 | 424
Net | [2] | 959 | 919
Financial instruments credit-impaired [member] | Peru [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [2] | 823 | 715
Allowance for credit losses | [2] | 400 | 385
Net | [2] | 423 | 330
Financial instruments credit-impaired [member] | Chile [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [2] | 1,420 | 1,249
Allowance for credit losses | [2] | 332 | 281
Net | [2] | 1,088 | 968
Financial instruments credit-impaired [member] | Colombia [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [2] | 364 | 322
Allowance for credit losses | [2] | 132 | 109
Net | [2] | 232 | 213
Financial instruments credit-impaired [member] | Other International [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [2] | 727 | 843
Allowance for credit losses | [2] | 259 | 264
Net | [2] | 468 | 579
Financial instruments credit-impaired [member] | Residential mortgages [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [2] | 2,903 | 2,372
Allowance for credit losses | [2] | 840 | 645
Net | [2] | 2,063 | 1,727
Financial instruments credit-impaired [member] | Personal loans [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [2] | 1,071 | 1,117
Allowance for credit losses | [2] | 604 | 621
Net | [2] | 467 | 496
Financial instruments credit-impaired [member] | Business and government [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Gross impaired loans | [2] | 3,270 | 3,250
Allowance for credit losses | [2] | 897 | 788
Net | [2] | $ 2,373 | $ 2,462
[1] | Geographic segmentation is based on the location of the property for residential mortgages; otherwise, the residence of the borrower.
[2] | Interest income recognized on impaired loans during the year ended October 31, 2025 was $95 (2024 – $84).

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