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Retirement Benefit Plans - Effect on Present Value of Defined Benefit Obligation Due to a Reasonably Possible Change of the Significant Actuarial Assumptions (Parenthetical) (Detail) | Dec. 31, 2024 | Dec. 31, 2023
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Discount rates [Member] |  |
Disclosure of sensitivity analysis for actuarial assumptions [Line Items] |  |
Percentage increase in actuarial assumptions | 0.50% | 0.50%
Percentage decrease in actuarial assumptions | 0.50% | 0.50%
Expected rates of salary increases [Member] |  |
Disclosure of sensitivity analysis for actuarial assumptions [Line Items] |  |
Percentage increase in actuarial assumptions | 0.50% | 0.50%
Percentage decrease in actuarial assumptions | 0.50% | 0.50%

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- Definition The reasonably possible percentage of the decrease in the actuarial assumption used to determine the present value of defined benefit obligation. [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 reasonably possible percentage of the increase in the actuarial assumption used to determine the present value of defined benefit obligation. [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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