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Derivative Financial Instruments - Summary of Credit Exposure of Derivative Financial Instruments (Detail) - CAD ($) $ in Millions | Oct. 31, 2025 | Oct. 31, 2024
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Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | $ 12,671,365 | $ 9,058,165
Credit risk amount | [2] | 8,679 | 8,869
Credit equivalent amount | [2] | 37,310 | 32,604
Risk Weighted Assets |  | 13,006 | 10,748
Credit valuation adjustment [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Risk Weighted Assets |  | 5,394 | 4,631
Interest rate contracts [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 10,594,263 | 7,253,076
Credit risk amount | [2] | 2,848 | 4,135
Credit equivalent amount | [2] | 4,707 | 4,517
Risk Weighted Assets |  | 1,205 | 994
Interest rate contracts [member] | Exchange-traded [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 768,366 | 617,297
Interest rate contracts [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 693,886 | 575,985
Interest rate contracts [member] | Futures [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 763,135 | 606,019
Credit equivalent amount | [2] | 73 | 27
Risk Weighted Assets |  | 3 | 1
Interest rate contracts [member] | Futures [member] | Exchange-traded [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 763,135 | 606,019
Interest rate contracts [member] | Forward contract [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 157,348 | 86,872
Credit risk amount | [2] | 61 | 70
Credit equivalent amount | [2] | 38 | 88
Risk Weighted Assets |  | 22 | 57
Interest rate contracts [member] | Forward contract [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 315 | 215
Interest rate contracts [member] | Swaps [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 9,501,153 | 6,453,740
Credit risk amount | [2] | 2,769 | 4,052
Credit equivalent amount | [2] | 4,402 | 4,157
Risk Weighted Assets |  | 1,123 | 876
Interest rate contracts [member] | Swaps [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 526,175 | 480,603
Interest rate contracts [member] | Options purchased [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 86,992 | 51,420
Credit risk amount | [2] | 18 | 13
Credit equivalent amount | [2] | 163 | 229
Risk Weighted Assets |  | 51 | 56
Interest rate contracts [member] | Options purchased [member] | Exchange-traded [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 2,686 | 5,848
Interest rate contracts [member] | Options purchased [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 84,306 | 45,572
Interest rate contracts [member] | Options written [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 85,635 | 55,025
Credit equivalent amount | [2] | 31 | 16
Risk Weighted Assets |  | 6 | 4
Interest rate contracts [member] | Options written [member] | Exchange-traded [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 2,545 | 5,430
Interest rate contracts [member] | Options written [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 83,090 | 49,595
Foreign exchange and gold contracts [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 1,706,906 | 1,551,034
Credit risk amount | [2] | 2,193 | 1,943
Credit equivalent amount | [2] | 16,896 | 13,839
Risk Weighted Assets |  | 3,790 | 2,865
Foreign exchange and gold contracts [member] | Exchange-traded [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 18,665 | 21,952
Foreign exchange and gold contracts [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 1,653,533 | 1,504,217
Foreign exchange and gold contracts [member] | Futures [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 18,665 | 21,952
Credit equivalent amount | [2] | 891 | 354
Risk Weighted Assets |  | 18 | 7
Foreign exchange and gold contracts [member] | Futures [member] | Exchange-traded [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 18,665 | 21,952
Foreign exchange and gold contracts [member] | Swaps [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 971,614 | 879,804
Credit risk amount | [2] | 53 | 40
Credit equivalent amount | [2] | 9,603 | 7,965
Risk Weighted Assets |  | 2,132 | 1,472
Foreign exchange and gold contracts [member] | Swaps [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 971,614 | 879,804
Foreign exchange and gold contracts [member] | Options purchased [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 32,750 | 25,135
Credit risk amount | [2] | 399 | 343
Credit equivalent amount | [2] | 592 | 633
Risk Weighted Assets |  | 210 | 214
Foreign exchange and gold contracts [member] | Options purchased [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 32,750 | 25,135
Foreign exchange and gold contracts [member] | Options written [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 46,781 | 36,390
Credit equivalent amount | [2] | 52 | 19
Risk Weighted Assets |  | 13 | 4
Foreign exchange and gold contracts [member] | Options written [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 46,781 | 36,390
Foreign exchange and gold contracts [member] | Spot and forwards [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 637,096 | 587,753
Credit risk amount | [2] | 1,741 | 1,560
Credit equivalent amount | [2] | 5,758 | 4,868
Risk Weighted Assets |  | 1,417 | 1,168
Foreign exchange and gold contracts [member] | Spot and forwards [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 602,388 | 562,888
Other derivative contracts [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 370,196 | 254,055
Credit risk amount | [2] | 3,638 | 2,791
Credit equivalent amount | [2] | 15,707 | 14,248
Risk Weighted Assets |  | 2,617 | 2,258
Other derivative contracts [member] | Exchange-traded [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 168,194 | 105,633
Other derivative contracts [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 194,127 | 139,102
Other derivative contracts [member] | Equity derivatives [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 260,974 | 143,749
Credit risk amount | [2] | 1,726 | 1,586
Credit equivalent amount | [2] | 12,157 | 10,848
Risk Weighted Assets |  | 2,115 | 1,742
Other derivative contracts [member] | Equity derivatives [member] | Exchange-traded [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 128,297 | 59,329
Other derivative contracts [member] | Equity derivatives [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 132,677 | 84,420
Other derivative contracts [member] | Credit derivative [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 27,831 | 27,155
Credit risk amount | [2] | 105 | 107
Credit equivalent amount | [2] | 131 | 141
Risk Weighted Assets |  | 50 | 29
Other derivative contracts [member] | Credit derivative [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 20,457 | 18,086
Other derivative contracts [member] | Commodity and other contracts [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount |  | 81,391 | 83,151
Credit risk amount | [2] | 1,807 | 1,098
Credit equivalent amount | [2] | 3,419 | 3,259
Risk Weighted Assets |  | 452 | 487
Other derivative contracts [member] | Commodity and other contracts [member] | Exchange-traded [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 39,897 | 46,304
Other derivative contracts [member] | Commodity and other contracts [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [1] | 40,993 | 36,596
Settled through central counterparties [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [3] | 10,129,819 | 6,838,861
Credit equivalent amount | [2],[3] | 6,036 | 6,221
Risk Weighted Assets | [3] | 139 | 138
Settled through central counterparties [member] | Exchange-traded [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [3] | 955,225 | 744,882
Credit equivalent amount | [2],[3] | 5,175 | 5,158
Risk Weighted Assets | [3] | 122 | 117
Settled through central counterparties [member] | Over-the-counter [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Notional amount | [3] | 9,174,594 | 6,093,979
Credit equivalent amount | [2],[3] | 861 | 1,063
Risk Weighted Assets | [3] | $ 17 | $ 21
[1] | The notional amounts represent the amount to which a rate or price is applied to determine the amount of cash flows to be exchanged.
[2] | The amounts presented are net of collateral and master netting agreements at the product level. The total amounts relating to netting and collateral were $37,853 (2024 – $35,510) for CRA, and $102,031 (2024 – $87,284) for CEA.
[3] | Amounts are included under total derivatives above. Amounts include exposures settled directly through central counterparties and exposures settled through clearing members of central counterparties.

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- Definition The credit risk amount (CRA) represents the estimated replacement cost, or positive fair value, for all contracts taking into account master netting or collateral arrangements that have been made. The CRA does not reflect actual or expected losses. + References No definition available. + Details
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