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Financial Assets and Liabilities - Additional Information (Detail) |  |  |  | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 24, 2021 PHP (₱) | Mar. 24, 2021 USD ($) | Aug. 02, 2016 | Aug. 05, 2014 | Sep. 30, 2019 PHP (₱) | Dec. 31, 2020 PHP (₱) USD ($) | Dec. 31, 2019 PHP (₱) USD ($) | Dec. 31, 2018 PHP (₱) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2017 PHP (₱)
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Financial instruments subject to enforceable master netting arrangement |  |  |  |  |  | ₱ 0 | ₱ 0 |  |  |  |
Transfers into of Level 3 of fair value hierarchy, investment properties |  |  |  |  |  | 0 | 0 |  |  |  |
Transfers out of Level 3 of fair value hierarchy, investment properties |  |  |  |  |  | 0 | 0 |  |  |  |
Financial liabilities fair value transfer into Level 3 |  |  |  |  |  | 0 | 0 |  |  |  |
Financial liabilities fair value transfer out of Level 3 |  |  |  |  |  | 0 | 0 |  |  |  |
Transfer of financial assets fair value from Level 1 to Level 2 |  |  |  |  |  | 0 | 0 |  |  |  |
Transfer of financial assets fair value from Level 2 to Level 1 |  |  |  |  |  | 0 | 0 |  |  |  |
Transfer of financial liabilities fair value from Level 1 to Level 2 |  |  |  |  |  | 0 | 0 |  |  |  |
Transfer of financial liabilities fair value from Level 2 to Level 1 |  |  |  |  |  | 0 | 0 |  |  |  |
Cash and cash equivalents |  |  |  |  |  | 40,237,000,000 | 24,369,000,000 | ₱ 51,654,000,000 |  |  | ₱ 32,905,000,000
Short-term investments |  |  |  |  |  | ₱ 989,000,000 | 314,000,000 |  |  |  |
Exchange rate |  |  |  |  |  | 1.00 |  |  |  |  |
Increase in consolidated foreign currency-denominated financial liabilities |  |  |  |  |  | ₱ 853,000,000 |  |  |  |  |
Net foreign exchange gains |  |  |  |  | ₱ 424,000,000 | ₱ 1,488,000,000 |  |  |  |  |
Net foreign exchange loss |  |  |  |  |  |  |  | 771,000,000 |  |  |
Percentage of decrease or decrease in value of currency |  |  |  |  |  | 1.00% |  |  |  |  |
Foreign exchange gain (loss ) after tax |  |  |  |  |  | ₱ 870,000,000 |  |  |  |  |
Net foreign exchange gain /loss on equity instrument |  |  |  |  |  | 909,000,000 |  |  |  |  |
Decrease in consolidated variable rate debt |  |  |  |  |  | 33,077,000,000 | 35,098,000,000 |  |  |  |
Foreign exchange gains (losses) – net (Note 28) |  |  |  |  |  | ₱ 1,488,000,000 | ₱ 424,000,000 | ₱ (771,000,000) |  |  |
Decrease in dividend payout |  |  | 60.00% |  |  |  |  |  |  |  |
Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividend Pay Out Rate |  |  |  | 70.00% |  |  |  |  |  |  |
Top of range [member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividend Pay Out Rate |  |  |  | 75.00% |  |  |  |  |  |  |
Floating interest rate [member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of consolidated debts with variable rates |  |  |  |  |  | 15.00% | 18.00% |  | 15.00% | 18.00% |
Fixed interest rate [member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of consolidated debts with fixed rate |  |  |  |  |  | 86.00% | 88.00% |  | 86.00% | 88.00% |
Foreign currency exchange risk [Member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Exchange rate |  |  |  |  |  | 1.00 | 1.00 |  |  |  |
Percentage of consolidated debts |  |  |  |  |  | 18.00% | 9.00% |  |  |  |
Increase in consolidated foreign currency-denominated debt |  |  |  |  |  | ₱ 40,872,000,000 | ₱ 17,029,000,000 |  |  |  |
Percentage of consolidated debts unhedged |  |  |  |  |  | 13.00% | 8.00% |  | 13.00% | 8.00% |
Percentage of consolidated debts unhedged net of cash allocated for debt |  |  |  |  |  | 5.00% | 8.00% |  | 5.00% | 8.00% |
Percentage of consolidated revenues denominated in U.S. dollars |  |  |  |  |  | 16.00% | 15.00% |  | 16.00% | 15.00% |
Percentage of consolidated expenses denominated in U.S. dollars |  |  |  |  |  | 12.00% | 11.00% |  | 12.00% | 11.00% |
Increase in value of currency |  |  |  |  |  | 5.47% |  |  |  |  |
Long-term Currency Swap Contracts and Foreign Currency Options [Member] | Foreign currency exchange risk [Member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate notional amount | $ |  |  |  |  |  |  |  |  | $ 224,000,000 | $ 36,000,000 |
Interest rate swap contract [member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Aggregate notional amount | $ |  |  |  |  |  |  |  |  | $ 40,000,000 | $ 233,000,000 |
Events after Reporting Period [Member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Exchange rate | 48.68 | 1.00 |  |  |  |  |  |  |  |  |
Other obligations [Member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Various Trade And Other Obligations |  |  |  |  |  | ₱ 169,808,000,000 | ₱ 153,255,000,000 |  |  |  |
Foreign currency exchange risk [Member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis |  |  |  |  |  | 5 |  |  |  |  |
Percentage of exchange rate weaken/strengthen |  |  |  |  |  | 15.00% |  |  |  |  |
Foreign currency exchange risk [Member] | U.S. Dollars [Member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis |  |  |  |  |  | 5 |  |  |  |  |
Increase decrease in profit after tax |  |  |  |  |  | ₱ 1,000,000 |  |  |  |  |
Foreign exchange gains (losses) – net (Note 28) |  |  |  |  |  | ₱ 6,000,000 |  |  |  |  |
Foreign currency exchange risk [Member] | Philippine Peso [Member] |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Financial Liabilities [Line Items] |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis |  |  |  |  |  | 15 |  |  |  |  |
Increase decrease in profit after tax |  |  |  |  |  | ₱ 1,900,000 |  |  |  |  |
Foreign exchange gains (losses) – net (Note 28) |  |  |  |  |  | ₱ 34,000,000 |  |  |  |  |

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- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2020-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_45&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B13 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of financial instruments subject to an enforceable master netting arrangement or similar agreement that are not set off against financial liabilities. [Refer: Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph IG40D -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_IG40D&doctype=Implementation%20Guidance -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 13C -Subparagraph d -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_13C_d_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The gains (losses) recognised in other comprehensive income on exchange differences on the translation of financial statements of foreign operations, net of tax. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_91_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition Percentage of consolidated debts with fixed rate. + References No definition available. + Details
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Namespace Prefix: | phi_
Data Type: | num:percentItemType
Balance Type: | na
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- Definition Percentage of consolidated debts with variable rates. + References No definition available. + Details
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Namespace Prefix: | phi_
Data Type: | num:percentItemType
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- Definition Percentage of consolidated expenses denominated in U.S. dollars. + References No definition available. + Details
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Namespace Prefix: | phi_
Data Type: | num:percentItemType
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- Definition Percentag of consolidated revenues denominated in U.S. dollars. + References No definition available. + Details
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Namespace Prefix: | phi_
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- Definition Percentage of increase decrease in exchange rate. + References No definition available. + Details
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- Definition Percentage of increase in value of currency. + References No definition available. + Details
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- Definition Percentage of increase or decrease in value of currency. + References No definition available. + Details
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Namespace Prefix: | phi_
Data Type: | num:percentItemType
Balance Type: | na
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- Definition Various trade and other obligations. + References No definition available. + Details
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Namespace Prefix: | phi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Details
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- Details
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- Details
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- Details
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