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Employee Benefits - Summary of Financial Information related to Principal Plans (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2025 | Oct. 31, 2024
Pension plans [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | $ 161 |
Excess (deficit) of fair value of assets over benefit obligation at end of year |  | 724 | $ 369
Effect of asset limitation and minimum funding requirement |  | (223) | (208)
End of year |  | 501 | 161
Pension plans [member] | Change in Benefit Obligation [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | 8,891 | 7,669
Current service cost |  | 244 | 205
Net interest expense (income) |  | 432 | 456
Employee contributions |  | 26 | 27
Benefits paid |  | (438) | (404)
Past service cost | [1] | 32 |
Settlements |  |  | (2)
Foreign exchange |  | 37 | (19)
Actuarial (loss) gain on benefit obligation |  | 8 | 959
End of year |  | 9,232 | 8,891
Pension plans [member] | Changes in Fair Value [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | 9,260 | 8,139
Net interest expense (income) |  | 467 | 494
Actual return on assets (net of administrative expenses) |  | 421 | 955
Employer contributions |  | 222 | 62
Employee contributions |  | 26 | 27
Benefits paid |  | (438) | (404)
Administrative expenses |  | (12) | (13)
Settlements |  |  | (3)
Foreign exchange |  | 10 | 3
End of year |  | 9,956 | 9,260
Pension plans [member] | Funded Status [Member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | 161 |
Excess (deficit) of fair value of assets over benefit obligation at end of year |  | 724 | 369
Effect of asset limitation and minimum funding requirement | [2] | (223) | (208)
End of year |  | 501 | 161
Pension plans [member] | Funded Status [Member] | Other assets [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | 684 |
End of year |  | 1,036 | 684
Pension plans [member] | Funded Status [Member] | Other liabilities [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | (523) |
End of year |  | (535) | (523)
Pension plans [member] | Annual Benefit Expense [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Current service cost |  | 244 | 205
Net interest expense (income) |  | (13) | (32)
Administrative expenses |  | 12 | 12
Past service cost | [1] | 32 |
Amount of settlement (gain) loss recognized |  |  | 1
Benefit expense (income) recorded in the Consolidated Statement of Income (A) |  | 275 | 186
Defined contribution benefit expense (B) |  | 205 | 183
Pension plans [member] | Remeasurements [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Remeasurement of other long-term benefits |  | 419 | (150)
(Return) on plan assets in excess of interest income on fair value of assets |  | 421 | 955
Actuarial (loss) gain on benefit obligation |  | (8) | (959)
Change in the asset limitation |  | 6 | (146)
Total benefit cost (A + B - C) |  | 61 | 519
Pension plans [member] | Additional Details [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Actual return on assets (net of administrative expenses) |  | (876) | (1,436)
Actuarial gains and (losses) from changes in demographic assumptions |  | 4 | 7
Actuarial gains and (losses) from changes in financial assumptions |  | (16) | (952)
Actuarial gains and (losses) from changes in experience |  | 4 | (14)
In Scotiabank securities (stock, bonds) |  | 54 | 67
In property occupied by Scotiabank |  | 3 | 4
Pension plans [member] | Effect of asset ceiling [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | 208 | 55
Net interest expense (income) |  | 22 | 6
Remeasurement of other long-term benefits |  | (6) | 146
Foreign exchange |  | (1) | 1
End of year |  | 223 | 208
Other benefit plans [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | (1,063) |
Excess (deficit) of fair value of assets over benefit obligation at end of year |  | (1,091) | (1,063)
End of year |  | (1,091) | (1,063)
Other benefit plans [member] | Change in Benefit Obligation [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | 1,147 | 1,114
Current service cost |  | 22 | 20
Net interest expense (income) |  | 70 | 77
Benefits paid |  | (94) | (101)
Past service cost | [1] | (63) | (1)
Business acquisition |  | (2) |
Foreign exchange |  | 19 | (21)
Actuarial (loss) gain on benefit obligation |  | 55 | 59
End of year |  | 1,154 | 1,147
Other benefit plans [member] | Changes in Fair Value [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | 84 | 113
Net interest expense (income) |  | 8 | 9
Actual return on assets (net of administrative expenses) |  | (1) | 8
Employer contributions |  | 61 | 62
Benefits paid |  | (94) | (101)
Foreign exchange |  | 5 | (7)
End of year |  | 63 | 84
Other benefit plans [member] | Funded Status [Member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | (1,063) |
Excess (deficit) of fair value of assets over benefit obligation at end of year |  | (1,091) | (1,063)
End of year |  | (1,091) | (1,063)
Other benefit plans [member] | Funded Status [Member] | Other assets [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | 1 |
End of year |  | 1 | 1
Other benefit plans [member] | Funded Status [Member] | Other liabilities [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Beginning of year |  | (1,064) |
End of year |  | (1,092) | (1,064)
Other benefit plans [member] | Annual Benefit Expense [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Current service cost |  | 22 | 20
Net interest expense (income) |  | 62 | 68
Past service cost | [1] | (63) | (1)
Remeasurement of other long-term benefits |  | 2 | 6
Benefit expense (income) recorded in the Consolidated Statement of Income (A) |  | 23 | 93
Defined contribution benefit expense (B) |  | 1 | 1
Other benefit plans [member] | Remeasurements [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Remeasurement of other long-term benefits |  | (54) | (45)
(Return) on plan assets in excess of interest income on fair value of assets |  | (1) | 8
Actuarial (loss) gain on benefit obligation |  | (53) | (53)
Total benefit cost (A + B - C) |  | 78 | 139
Other benefit plans [member] | Additional Details [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Actual return on assets (net of administrative expenses) |  | (7) | (19)
Actuarial gains and (losses) from changes in demographic assumptions |  | (11) |
Actuarial gains and (losses) from changes in financial assumptions |  | (47) | (53)
Actuarial gains and (losses) from changes in experience |  | $ 3 | $ (6)
[1] | Other benefit plans past service costs relate to certain post-retirement plan amendments.
[2] | The recognized asset is limited by the present value of economic benefits available from a reduction in future contributions to a plan and from the ability to pay plan expenses from the fund.

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- Definition Return on plan assetsin n excess of interest income net defined benefit liability asset. + References No definition available. + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_c_ii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph c -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_c_iii&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments that result in remeasurements of the net defined benefit liability (asset). Experience adjustments deal with the effects of differences between the previous actuarial assumptions and what has actually occurred. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease (increase) in net defined benefit liability (asset) resulting from contributions to a defined benefit plan by the employer. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_f&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan by plan participants. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_f&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from the remeasurement of that net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from settlements. Settlements are transactions that eliminate all further legal or constructive obligations for part or all of the benefits provided under a defined benefit plan, other than a payment of benefits to, or on behalf of, employees that is set out in the terms of the plan and included in the actuarial assumptions. [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]; Actuarial assumptions [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from business combinations and disposals. [Refer: Total for all business combinations [member]; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_h&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes in foreign exchange rates. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_e&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_b&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 140 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_140_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from past service cost. Past service cost is the change in the present value of the defined benefit obligation for employee service in prior periods, resulting from a plan amendment (the introduction or withdrawal of, or changes to, a defined benefit plan) or a curtailment (a significant reduction by the entity in the number of employees covered by a plan). [Refer: Net defined benefit liability (asset); Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of post-employment benefit expense relating to defined contribution plans. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 53 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_53&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount real estate contributes to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 142 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_142_d&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets, excluding amounts included in interest income or expense. The return on plan assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Plan assets [member]; Net defined benefit liability (asset); Actuarial assumptions [domain]; Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 141 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_141_c_i&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The fair value of any plan assets, less the present value of the defined benefit obligation. [Refer: Plan assets [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_57_a&doctype=Standard -URIDate 2024-03-27 + Details
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