Employee benefits - Pension and other post-employment benefits - Summary of Composition of Remeasurements Recorded in OCI (Detail) - Remeasurements of Employee Benefit Plans to OCI [member] - CAD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
Jul. 31, 2026 |
Jul. 31, 2025 |
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| Defined benefit pension plans [member] | ||||
| Actuarial (gains) losses: | ||||
| Changes in financial assumptions | $ (175) | $ (150) | $ (835) | $ (333) |
| Experience adjustments | 1 | (1) | ||
| Return on plan assets (excluding interest based on discount rate) | (169) | (222) | 194 | (90) |
| Total remeasurements of employee benefit plans | (343) | (372) | (641) | (424) |
| Other post employment benefit [member] | ||||
| Actuarial (gains) losses: | ||||
| Changes in financial assumptions | (16) | (14) | (63) | (28) |
| Experience adjustments | (1) | 3 | (5) | 1 |
| Total remeasurements of employee benefit plans | $ (17) | $ (11) | $ (68) | $ (27) |
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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)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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)] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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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)] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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