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Employee Benefits (Summary of Sensitivity of Significant Actuarial Assumptions) (Details) $ in Millions | Oct. 31, 2025 CAD ($)
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Actuarial assumption of discount rates [member] | Principal pension plans [Member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
1 year/percentage decrease in assumption | $ 1,280
1 year/percentage increase in assumption | (1,017)
Actuarial assumption of discount rates [member] | Principal post-retirement benefit plan [Member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
1 year/percentage decrease in assumption | 53
1 year/percentage increase in assumption | (43)
Actuarial assumption of discount rates [member] | Other pension plans [Member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
1 year/percentage decrease in assumption | 286
1 year/percentage increase in assumption | (237)
Actuarial assumption of expected rates of salary increases [member] | Principal pension plans [Member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
1 year/percentage decrease in assumption | (240)
1 year/percentage increase in assumption | 213
Actuarial assumption of expected rates of salary increases [member] | Principal post-retirement benefit plan [Member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
1 year/percentage decrease in assumption | 0
1 year/percentage increase in assumption | 0
Actuarial assumption of expected rates of salary increases [member] | Other pension plans [Member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
1 year/percentage decrease in assumption | (23)
1 year/percentage increase in assumption | 28
Actuarial assumption of life expectancy after retirement [member] | Principal pension plans [Member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
1 year/percentage decrease in assumption | (157)
1 year/percentage increase in assumption | 152
Actuarial assumption of life expectancy after retirement [member] | Principal post-retirement benefit plan [Member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
1 year/percentage decrease in assumption | (11)
1 year/percentage increase in assumption | 11
Actuarial assumption of life expectancy after retirement [member] | Other pension plans [Member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
1 year/percentage decrease in assumption | (76)
1 year/percentage increase in assumption | 75
Actuarial assumption of medical cost trend rates [member] | Principal post-retirement benefit plan [Member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
1 year/percentage decrease in assumption | (7)
1 year/percentage increase in assumption | $ 8

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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 145 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_145_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 145 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_145_a&doctype=Standard -URIDate 2024-03-27 + Details
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