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Operating and Geographic Segmentation - Summary of Average Assets, Grouped by Operating Segment (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2025 | Oct. 31, 2024
Disclosure of operating segments [line items] |  |
Net interest income | $ 21,487 | $ 19,468
Non-interest revenue | 14,787 | 13,327
Total Revenue | 36,274 | 32,795
Total provision (recovery of) for credit losses | 3,617 | 3,761
Depreciation and amortization | 2,180 | 2,110
Non-interest expense | 18,927 | 17,389
Income (loss) before taxes and non-controlling interest in subsidiaries | 11,550 | 9,535
Provision for (recovery of) income taxes | 2,825 | 2,208
Reported net income (loss) | 8,725 | 7,327
Non-controlling interest in subsidiaries | 16 | 9
Net income (loss) attributable to bank shareholders | 8,709 | 7,318
Average assets | 1,480,561 | 1,369,415
Impaired Loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | 3,147 | 3,066
Performing loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | 470 | 695
Canadian P&C [member] |  |
Disclosure of operating segments [line items] |  |
Net interest income | 9,667 | 8,852
Non-interest revenue | 2,595 | 2,587
Total Revenue | 12,262 | 11,439
Total provision (recovery of) for credit losses | 2,364 | 1,659
Depreciation and amortization | 644 | 590
Non-interest expense | 4,716 | 4,415
Income (loss) before taxes and non-controlling interest in subsidiaries | 4,538 | 4,775
Provision for (recovery of) income taxes | 1,243 | 1,318
Reported net income (loss) | 3,295 | 3,457
Net income (loss) attributable to bank shareholders | 3,295 | 3,457
Average assets | 344,176 | 327,883
Canadian P&C [member] | Impaired Loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | 1,952 | 1,326
Canadian P&C [member] | Performing loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | 412 | 333
U.S. Banking [member] |  |
Disclosure of operating segments [line items] |  |
Net interest income | 9,017 | 8,602
Non-interest revenue | 2,466 | 2,209
Total Revenue | 11,483 | 10,811
Total provision (recovery of) for credit losses | 1,043 | 1,677
Depreciation and amortization | 990 | 1,006
Non-interest expense | 5,865 | 5,684
Income (loss) before taxes and non-controlling interest in subsidiaries | 3,585 | 2,444
Provision for (recovery of) income taxes | 775 | 434
Reported net income (loss) | 2,810 | 2,010
Non-controlling interest in subsidiaries | 14 | 2
Net income (loss) attributable to bank shareholders | 2,796 | 2,008
Average assets | 257,177 | 251,881
U.S. Banking [member] | Impaired Loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | 1,010 | 1,285
U.S. Banking [member] | Performing loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | 33 | 392
Wealth Management [member] |  |
Disclosure of operating segments [line items] |  |
Net interest income | 1,020 | 873
Non-interest revenue | 4,282 | 3,726
Total Revenue | 5,302 | 4,599
Total provision (recovery of) for credit losses | 10 | 17
Depreciation and amortization | 215 | 215
Non-interest expense | 3,245 | 2,961
Income (loss) before taxes and non-controlling interest in subsidiaries | 1,832 | 1,406
Provision for (recovery of) income taxes | 451 | 339
Reported net income (loss) | 1,381 | 1,067
Net income (loss) attributable to bank shareholders | 1,381 | 1,067
Average assets | 53,224 | 49,134
Wealth Management [member] | Impaired Loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | 8 | 15
Wealth Management [member] | Performing loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | 2 | 2
Capital Markets [member] |  |
Disclosure of operating segments [line items] |  |
Net interest income | 2,482 | 1,731
Non-interest revenue | 4,965 | 4,785
Total Revenue | 7,447 | 6,516
Total provision (recovery of) for credit losses | 201 | 369
Depreciation and amortization | 331 | 299
Non-interest expense | 4,285 | 3,979
Income (loss) before taxes and non-controlling interest in subsidiaries | 2,630 | 1,869
Provision for (recovery of) income taxes | 653 | 377
Reported net income (loss) | 1,977 | 1,492
Net income (loss) attributable to bank shareholders | 1,977 | 1,492
Average assets | 551,491 | 468,963
Capital Markets [member] | Impaired Loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | 133 | 367
Capital Markets [member] | Performing loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | 68 | 2
Corporate services [member] |  |
Disclosure of operating segments [line items] |  |
Net interest income | (699) | (590)
Non-interest revenue | 479 | 20
Total Revenue | (220) | (570)
Total provision (recovery of) for credit losses | (1) | 39
Non-interest expense | 816 | 350
Income (loss) before taxes and non-controlling interest in subsidiaries | (1,035) | (959)
Provision for (recovery of) income taxes | (297) | (260)
Reported net income (loss) | (738) | (699)
Non-controlling interest in subsidiaries | 2 | 7
Net income (loss) attributable to bank shareholders | (740) | (706)
Average assets | 274,493 | 271,554
Corporate services [member] | Impaired Loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | 44 | 73
Corporate services [member] | Performing loans [member] |  |
Disclosure of operating segments [line items] |  |
Total provision (recovery of) for credit losses | $ (45) | $ (34)

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