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Pension and Other Employee Benefits - Summary of Changes in Present Value of Defined Benefit Obligations, Fair Value of Plan Assets and Components of Net Periodic Benefit Costs of Defined Contribution Plans (Detail) - PHP (₱) ₱ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |  |
Service costs | ₱ 1,016 | ₱ 1,093 | ₱ 1,614
Interest costs - net | (73) | 190 | 317
Net periodic benefit costs | 1,215 | 1,544 | 1,931
Smart and Subsidiaries [Member] |  |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |  |
Service costs | 262 | 262 | 313
Funded status – net | (818) | (708) | (873)
Prepaid benefit costs (Note 18) | 818 | 708 | 873
Interest costs - net | (51) | (57) | (31)
Net periodic benefit costs | 211 | 205 | 282
Present value of defined benefit obligation [Member] |  |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |  |
Present value of defined benefit obligations at beginning of the year | 15,883 | 22,298 | 28,197
Service costs | 1,016 | 1,093 | 1,614
Actuarial (losses) - experience | (2,303) | 3,972 | 5,502
Actual benefits paid/settlements | (2,848) | (102) | (3,471)
Present value of defined benefit obligations at end of the year | 17,964 | 15,883 | 22,298
Interest costs - net | 1,065 | 1,173 | 922
Present value of defined benefit obligation [Member] | Smart and Subsidiaries [Member] |  |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |  |
Present value of defined benefit obligations at beginning of the year | 2,777 | 3,264 | 2,775
Service costs | 262 | 262 | 313
Interest costs on benefit obligation | 210 | 156 | 101
Actuarial gains (losses) - economic assumptions | (8) | 20 | 40
Actuarial (losses) - experience | 98 | 216 | (12)
Actual benefits paid/settlements | (344) | (396) |
Curtailment and others | (15) | (273) | 103
Present value of defined benefit obligations at end of the year | 2,800 | 2,777 | 3,264
Plan assets [Member] |  |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |  |
Actual benefits paid/settlements | (2,510) | (5,313) | (3,471)
Fair value of plan assets at beginning of the year | 16,291 | 14,683 | 15,000
Actual contributions | 4,507 | 6,359 | 3,614
Interest income on plan assets | 1,138 | 983 | 605
Return on plan assets (excluding amount included in net interest) | (4,904) | (421) | (1,065)
Fair value of plan assets at end of the year | 14,522 | 16,291 | 14,683
Plan assets [Member] | Smart and Subsidiaries [Member] |  |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |  |
Actual benefits paid/settlements | (372) | (842) |
Fair value of plan assets at beginning of the year | 3,485 | 4,137 | 3,651
Actual contributions | 248 | 299 | 306
Interest income on plan assets | 261 | 213 | 132
Return on plan assets (excluding amount included in net interest) | (4) | (322) | (18)
Others |  |  | 66
Fair value of plan assets at end of the year | ₱ 3,618 | ₱ 3,485 | ₱ 4,137

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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 2023-01-01 -Paragraph 141 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c_ii&doctype=Standard -URIDate 2023-03-23 + 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 2023-01-01 -Paragraph 141 -Subparagraph c -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c_iii&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_f&doctype=Standard -URIDate 2023-03-23 + 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 2023-01-01 -Paragraph 141 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_57_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + 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 [member]; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_d&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141&doctype=Standard -URIDate 2023-03-23 + 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 2023-01-01 -Paragraph 141 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_g&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 57 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_57_a&doctype=Standard -URIDate 2023-03-23 + 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 [member]; 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 2023-01-01 -Paragraph 141 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c_i&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Actuarial gains losses arising from changes in demographic assumptions net defined benefit liability. + References No definition available. + Details
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- Definition Defined benefit plan net periodic benefit cost. + References No definition available. + Details
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- Definition Interest costs on benefit obligation. + References No definition available. + Details
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- Definition Prepaid benefit costs. + References No definition available. + Details
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