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Loans and Allowance for Credit Losses - Summary of Continuity in Loss Allowance by Each Product Type (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2025 | Oct. 31, 2024
Disclosure of credit risk exposure [line items] |  |
Beginning balance | $ 4,936 |
Ending balance | 5,739 | $ 4,936
IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 4,936 |
Ending balance | 5,739 | 4,936
IFRS9 [member] | Allowance for credit losses related to loans [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 4,356 |
Ending balance | 5,050 | 4,356
IFRS9 [member] | Allowance for credit losses related to other credit instruments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 580 |
Ending balance | 689 | 580
Residential mortgages [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 261 | 234
Net remeasurement of loss allowance | 73 | 64
Loan originations | 23 | 24
Derecognitions and maturities | (21) | (16)
Model changes | (23) | (6)
Total PCL | 52 | 66
Write-offs | (10) | (5)
Recoveries of previous write-offs | 9 | 7
Foreign exchange and other | (65) | (41)
Ending balance | 247 | 261
Consumer installment and other personal loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 843 | 806
Net remeasurement of loss allowance | 587 | 555
Loan originations | 32 | 54
Derecognitions and maturities | (59) | (66)
Model changes | 123 | 61
Total PCL | 683 | 604
Write-offs | (692) | (623)
Recoveries of previous write-offs | 151 | 195
Foreign exchange and other | (70) | (139)
Ending balance | 915 | 843
Credit Card Loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 705 | 496
Net remeasurement of loss allowance | 750 | 759
Loan originations | 52 | 76
Derecognitions and maturities | (63) | (35)
Model changes | 133 | 13
Total PCL | 872 | 813
Write-offs | (903) | (720)
Recoveries of previous write-offs | 209 | 171
Foreign exchange and other | (92) | (55)
Ending balance | 791 | 705
Business and government loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 3,127 | 2,731
Net remeasurement of loss allowance | 2,223 | 2,338
Loan originations | 285 | 286
Derecognitions and maturities | (548) | (466)
Model changes | 51 | 110
Total PCL | 2,011 | 2,268
Write-offs | (1,367) | (1,802)
Recoveries of previous write-offs | 314 | 194
Foreign exchange and other | (299) | (264)
Ending balance | 3,786 | 3,127
Stage One [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 1,378 |
Ending balance | 1,375 | 1,378
Stage One [member] | IFRS9 [member] | Allowance for credit losses related to loans [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 1,143 |
Ending balance | 1,119 | 1,143
Stage One [member] | IFRS9 [member] | Allowance for credit losses related to other credit instruments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 235 |
Ending balance | 256 | 235
Stage One [member] | Residential mortgages [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 56 | 73
Transfer to Stage 1 | 151 | 132
Transfer to Stage 2 | (15) | (26)
Transfer to Stage 3 |  | (1)
Net remeasurement of loss allowance | (135) | (142)
Loan originations | 23 | 24
Derecognitions and maturities | (5) | (3)
Model changes | (20) | (1)
Total PCL | (1) | (17)
Foreign exchange and other | 1 |
Ending balance | 56 | 56
Stage One [member] | Consumer installment and other personal loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 197 | 220
Transfer to Stage 1 | 331 | 301
Transfer to Stage 2 | (62) | (44)
Transfer to Stage 3 | (7) | (7)
Net remeasurement of loss allowance | (317) | (237)
Loan originations | 32 | 54
Derecognitions and maturities | (19) | (16)
Model changes | 46 | 15
Total PCL | 4 | 66
Foreign exchange and other | (1) | (89)
Ending balance | 200 | 197
Stage One [member] | Credit Card Loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 233 | 188
Transfer to Stage 1 | 239 | 226
Transfer to Stage 2 | (115) | (64)
Transfer to Stage 3 | (9) | (6)
Net remeasurement of loss allowance | (194) | (182)
Loan originations | 52 | 76
Derecognitions and maturities | (13) | (8)
Model changes | (2) | 4
Total PCL | (42) | 46
Foreign exchange and other | (3) | (1)
Ending balance | 188 | 233
Stage One [member] | Business and government loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 892 | 1,043
Transfer to Stage 1 | 553 | 601
Transfer to Stage 2 | (254) | (278)
Transfer to Stage 3 | (8) | (9)
Net remeasurement of loss allowance | (419) | (599)
Loan originations | 285 | 278
Derecognitions and maturities | (146) | (147)
Model changes | 24 | 53
Total PCL | 35 | (101)
Foreign exchange and other | 4 | (50)
Ending balance | 931 | 892
Stage Two [Member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 2,827 |
Ending balance | 3,334 | 2,827
Stage Two [Member] | IFRS9 [member] | Allowance for credit losses related to loans [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 2,560 |
Ending balance | 2,957 | 2,560
Stage Two [Member] | IFRS9 [member] | Allowance for credit losses related to other credit instruments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 267 |
Ending balance | 377 | 267
Stage Two [Member] | Residential mortgages [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 186 | 151
Transfer to Stage 1 | (148) | (130)
Transfer to Stage 2 | 50 | 42
Transfer to Stage 3 | (44) | (29)
Net remeasurement of loss allowance | 154 | 170
Derecognitions and maturities | (16) | (13)
Model changes | (3) | (5)
Total PCL | (7) | 35
Ending balance | 179 | 186
Stage Two [Member] | Consumer installment and other personal loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 471 | 434
Transfer to Stage 1 | (310) | (283)
Transfer to Stage 2 | 114 | 91
Transfer to Stage 3 | (177) | (133)
Net remeasurement of loss allowance | 421 | 355
Derecognitions and maturities | (40) | (38)
Model changes | 77 | 46
Total PCL | 85 | 38
Foreign exchange and other | (1) | (1)
Ending balance | 555 | 471
Stage Two [Member] | Credit Card Loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 472 | 308
Transfer to Stage 1 | (239) | (226)
Transfer to Stage 2 | 116 | 64
Transfer to Stage 3 | (453) | (290)
Net remeasurement of loss allowance | 633 | 633
Derecognitions and maturities | (50) | (27)
Model changes | 135 | 9
Total PCL | 142 | 163
Foreign exchange and other | (11) | 1
Ending balance | 603 | 472
Stage Two [Member] | Business and government loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 1,698 | 1,155
Transfer to Stage 1 | (510) | (575)
Transfer to Stage 2 | 362 | 394
Transfer to Stage 3 | (388) | (310)
Net remeasurement of loss allowance | 1,166 | 1,189
Loan originations |  | 8
Derecognitions and maturities | (402) | (308)
Model changes | 27 | 57
Total PCL | 255 | 455
Foreign exchange and other | 44 | 88
Ending balance | 1,997 | 1,698
Stage three [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 731 |
Ending balance | 1,030 | 731
Stage three [member] | IFRS9 [member] | Allowance for credit losses related to loans [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 653 |
Ending balance | 974 | 653
Stage three [member] | IFRS9 [member] | Allowance for credit losses related to other credit instruments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 78 |
Ending balance | 56 | 78
Stage three [member] | Residential mortgages [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 19 | 10
Transfer to Stage 1 | (3) | (2)
Transfer to Stage 2 | (35) | (16)
Transfer to Stage 3 | 44 | 30
Net remeasurement of loss allowance | 54 | 36
Total PCL | 60 | 48
Write-offs | (10) | (5)
Recoveries of previous write-offs | 9 | 7
Foreign exchange and other | (66) | (41)
Ending balance | 12 | 19
Stage three [member] | Consumer installment and other personal loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 175 | 152
Transfer to Stage 1 | (21) | (18)
Transfer to Stage 2 | (52) | (47)
Transfer to Stage 3 | 184 | 140
Net remeasurement of loss allowance | 483 | 437
Derecognitions and maturities |  | (12)
Total PCL | 594 | 500
Write-offs | (692) | (623)
Recoveries of previous write-offs | 151 | 195
Foreign exchange and other | (68) | (49)
Ending balance | 160 | 175
Stage three [member] | Credit Card Loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Transfer to Stage 2 | (1) |
Transfer to Stage 3 | 462 | 296
Net remeasurement of loss allowance | 311 | 308
Total PCL | 772 | 604
Write-offs | (903) | (720)
Recoveries of previous write-offs | 209 | 171
Foreign exchange and other | (78) | (55)
Stage three [member] | Business and government loans [member] | IFRS9 [member] |  |
Disclosure of credit risk exposure [line items] |  |
Beginning balance | 537 | 533
Transfer to Stage 1 | (43) | (26)
Transfer to Stage 2 | (108) | (116)
Transfer to Stage 3 | 396 | 319
Net remeasurement of loss allowance | 1,476 | 1,748
Derecognitions and maturities |  | (11)
Total PCL | 1,721 | 1,914
Write-offs | (1,367) | (1,802)
Recoveries of previous write-offs | 314 | 194
Foreign exchange and other | (347) | (302)
Ending balance | $ 858 | $ 537

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- Definition Derecognitions and maturities allowance account for credit losses of financial assets. + References No definition available. + Details
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