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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, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |  |
Service costs | ₱ 1,063 | ₱ 1,158 | ₱ 1,066
Accrued benefit costs | 7,159 | 8,984 | 11,197
Interest costs – net | 457 | 539 | 471
Net periodic benefit costs (Note 5) | 1,541 | 1,356 | 1,537
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 | 21,503 | 23,142 | 21,602
Service costs | 1,063 | 1,158 | 1,066
Actuarial losses – economic assumptions | 2,611 | 1,277 | 694
Actuarial gains – experience | (419) | (423) | (369)
Actual benefits paid/settlements | (887) | (2,723) | (241)
Present value of defined benefit obligations at end of the year | 20,683 | 21,503 | 23,142
Interest costs – net | 1,227 | 1,180 | 1,071
Plan assets [Member] |  |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |  |
Actual benefits paid/settlements | (887) | (2,723) | (241)
Fair value of plan assets at beginning of the year | 12,534 | 11,960 | 11,439
Actual contributions | 5,110 | 5,122 | 5,708
Interest income on plan assets | 770 | 641 | 600
Return on plan assets (excluding amount included in net interest) | (3,988) | (2,466) | (5,546)
Fair value of plan assets at end of the year | 13,539 | 12,534 | 11,960
Investment property [member] |  |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |  |
Service costs | 314 | 269 | 284
Curtailment and others |  |  | (15)
Funded status – net | 355 | 372 | 237
Accrued benefit costs | 23 | 13 | 9
Prepaid benefit costs (Note 18) | 378 | 385 | 246
Interest costs – net |  | (18) | (31)
Net periodic benefit costs (Note 5) | 314 | 251 | 238
Investment property [member] | 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 | 2,490 | 2,177 | 2,116
Service costs | 314 | 269 | 284
Interest costs on benefit obligation |  | 113 | 94
Actuarial losses – economic assumptions |  | 29 | 1
Actuarial gains – experience |  | (6) | (77)
Actual benefits paid/settlements |  | (92) | (226)
Curtailment and others |  |  | (15)
Present value of defined benefit obligations at end of the year | 2,804 | 2,490 | 2,177
Investment property [member] | Plan assets [Member] |  |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |  |
Actual benefits paid/settlements |  | (92) | (226)
Fair value of plan assets at beginning of the year | 2,862 | 2,414 | 2,388
Actual contributions | 297 | 335 | 201
Interest income on plan assets |  | 131 | 125
Return on plan assets (excluding amount included in net interest) |  | 74 | (74)
Fair value of plan assets at end of the year | ₱ 3,159 | ₱ 2,862 | ₱ 2,414

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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 2018-01-01 -Paragraph 141 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_141_c_ii&doctype=Standard -URIDate 2018-03-16 + 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 2018-01-01 -Paragraph 141 -Subparagraph c -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_141_c_iii&doctype=Standard -URIDate 2018-03-16 + 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 2018-01-01 -Paragraph 141 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_141_f&doctype=Standard -URIDate 2018-03-16 + 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 2018-01-01 -Paragraph 141 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_141_a&doctype=Standard -URIDate 2018-03-16 + 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 2018-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_57_a&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain 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 2018-01-01 -Paragraph 141 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_141_d&doctype=Standard -URIDate 2018-03-16 + 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 2018-01-01 -Paragraph 141 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_141_b&doctype=Standard -URIDate 2018-03-16 + 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 2018-01-01 -Paragraph 141 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_141_g&doctype=Standard -URIDate 2018-03-16 + 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 2018-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_57_a&doctype=Standard -URIDate 2018-03-16 + 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 plans 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]; Interest expense (income), net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 141 -Subparagraph c -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_141_c_i&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Accrued benefit costs. + 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 Funded status net. + 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 Interest income on plan assets. + References No definition available. + Details
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- Definition Prepaid benefit costs. + References No definition available. + Details
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