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Pension and Other Employee Benefits - Summary of Sensitivity Analysis on Defined Benefit Obligation of Defined Benefit Pension Plans (Detail) - PHP (₱) ₱ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Actuarial assumption of discount rates [Member] |  |
Disclosure Of Sensitivity Analysis For Actuarial Assumptions [Line Items] |  |
Increase (decrease) in defined benefit obligation due to 1% increase | ₱ 15,251 | ₱ 15,251
Increase (decrease) in defined benefit obligation due to 1% decrease | ₱ (19,348) | ₱ (19,348)
Percentage of increase in defined benefit obligation | 1.00% | 1.00%
Percentage of decrease in defined benefit obligation | (1.00%) | (1.00%)
Actuarial assumption of discount rates [Member] | Defined Contribution Plans [Member] |  |
Disclosure Of Sensitivity Analysis For Actuarial Assumptions [Line Items] |  |
Increase (decrease) in defined benefit obligation due to 1% increase | ₱ 32 | ₱ 32
Increase (decrease) in defined benefit obligation due to 1% decrease | ₱ (32) | ₱ (32)
Percentage of increase in defined benefit obligation | 1.00% | 1.00%
Percentage of decrease in defined benefit obligation | (1.00%) | (1.00%)
Actuarial Assumption of Expected Rates of Salary Increases [Member] |  |
Disclosure Of Sensitivity Analysis For Actuarial Assumptions [Line Items] |  |
Increase (decrease) in defined benefit obligation due to 1% increase | ₱ 19,334 | ₱ 19,334
Increase (decrease) in defined benefit obligation due to 1% decrease | ₱ (15,229) | ₱ (15,229)
Percentage of increase in defined benefit obligation | 1.00% | 1.00%
Percentage of decrease in defined benefit obligation | (1.00%) | (1.00%)
Actuarial Assumption of Expected Rates of Salary Increases [Member] | Defined Contribution Plans [Member] |  |
Disclosure Of Sensitivity Analysis For Actuarial Assumptions [Line Items] |  |
Increase (decrease) in defined benefit obligation due to 1% increase | ₱ 32 | ₱ 32
Increase (decrease) in defined benefit obligation due to 1% decrease | ₱ (32) | ₱ (32)
Percentage of increase in defined benefit obligation | 1.00% | 1.00%
Percentage of decrease in defined benefit obligation | (1.00%) | (1.00%)

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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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- 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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