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Loans, Impaired Loans and Allowance for Credit Losses - Loans And Acceptances Outstanding By Geography (Detail) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
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Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | $ 778,508 | $ 767,365
Acceptances | [1],[2] | 177 | 148
Total loans and acceptances | [1],[3] | 778,685 | 767,513
Allowance for credit losses | [1] | (7,463) | (6,537)
Total loans and acceptances net of allowance for credit losses | [1] | 771,222 | 760,976
Residential mortgages [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross |  | 370,191 | 350,941
Loans to consumers [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross |  | 110,567 | 106,379
Credit Card [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross |  | 18,045 | 17,374
Business and government [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross |  | 279,705 | 292,671
Canada [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 531,999 | 523,361
Canada [member] | Residential mortgages [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 312,131 | 297,677
Canada [member] | Loans to consumers [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 82,764 | 82,892
Canada [member] | Credit Card [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 9,018 | 8,982
Canada [member] | Business and government [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 128,086 | 133,810
United States [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 62,136 | 59,246
United States [member] | Loans to consumers [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 5,965 | 4,009
United States [member] | Business and government [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 56,171 | 55,237
Mexico [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 45,696 | 44,190
Mexico [member] | Residential mortgages [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 18,980 | 16,749
Mexico [member] | Loans to consumers [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 3,436 | 2,615
Mexico [member] | Credit Card [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 1,048 | 832
Mexico [member] | Business and government [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 22,232 | 23,994
Chile [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 51,111 | 49,159
Chile [member] | Residential mortgages [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 21,739 | 20,410
Chile [member] | Loans to consumers [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 5,125 | 4,868
Chile [member] | Credit Card [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 4,076 | 3,551
Chile [member] | Business and government [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 20,171 | 20,330
Peru [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 22,043 | 21,038
Peru [member] | Residential mortgages [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 4,625 | 4,113
Peru [member] | Loans to consumers [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 5,801 | 5,623
Peru [member] | Credit Card [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 492 | 757
Peru [member] | Business and government [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 11,125 | 10,545
Colombia [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 13,290 | 11,346
Colombia [member] | Residential mortgages [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 2,384 | 2,196
Colombia [member] | Loans to consumers [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 2,885 | 2,186
Colombia [member] | Credit Card [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 1,540 | 1,446
Colombia [member] | Business and government [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 6,481 | 5,518
Other International [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 52,233 | 59,025
Other International [member] | Residential mortgages [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 10,332 | 9,796
Other International [member] | Loans to consumers [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 4,591 | 4,186
Other International [member] | Credit Card [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | 1,871 | 1,806
Other International [member] | Business and government [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Loans and receivables gross | [1] | $ 35,439 | $ 43,237
[1] | Geographic segmentation is based on the location of the property for residential mortgages; otherwise, the residence of the borrower.
[2] | 98.8% of acceptances reside outside Canada (October 31, 2024 – 96.5%).
[3] | Loans and acceptances denominated in U.S. dollars were $119,788 (2024 – $137,804), in Chilean pesos $10,885 (2024 – $39,425), Mexican pesos $12,754 (2024 – $31,522), and in other foreign currencies $24,665 (2024 – $54,549).

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