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Loans, Impaired Loans and Allowance for Credit Losses - Impaired Loans (Detail) - CAD ($)
$ in Millions
Oct. 31, 2025
Oct. 31, 2024
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).