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Financial Assets and Liabilities - Summary of Impact of Hedging Instruments (Detail) ₱ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2018 PHP (₱) USD ($) | Dec. 31, 2017 PHP (₱) USD ($)
Foreign currency exchange risk [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Carrying Amount | ₱ 13 | ₱ 125
Line item in the Consolidated Statement | Current portion of derivative financial assets | Current portion of derivative financial assets
Foreign currency exchange risk [Member] | Long Term Currency Swaps [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Notional Amount | $ | 46 | 90
Carrying Amount | ₱ 83 | ₱ 115
Line item in the Consolidated Statement | Derivative financial assets - net of current portion | Derivative financial assets - net of current portion
Interest rate risk [member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Notional Amount | $ | 323 | 525
Carrying Amount | ₱ 227 | ₱ 122
Interest rate risk [member] | Interest Rate Swap1 |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Notional Amount | $ | 323 | 525
Carrying Amount | ₱ 57 | ₱ 101
Line item in the Consolidated Statement | Derivative financial assets - net of current portion | Derivative financial assets - net of current portion
Interest rate risk [member] | Derivative financial instruments and others [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Carrying Amount | ₱ 170 | ₱ 45
Line item in the Consolidated Statement | Current portion of derivative financial assets | Current portion of derivative financial assets
Interest rate risk [member] | Current Portion of Derivative Financial Assets [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Carrying Amount |  | ₱ (24)
Line item in the Consolidated Statement |  | Current portion of derivative financial assets

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- Definition The description of the line item in the statement of financial position that includes the hedged item. [Refer: Hedged items [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 24B -Subparagraph a -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_24B_a_iii&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 nominal amount of a hedging instrument. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 23B -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_23B_a&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 24A -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_24A_d&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition Hedged financial instruments carrying amount. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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