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Notes to the Statements of Cash Flows - Summary of Significant Non-cash Investing Activities and Corresponding Transaction Amounts (Detail) - PHP (₱) ₱ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Noncash Investing Activities [Abstract] |  |
Additions | ₱ 9,335 | ₱ 5,072

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- Definition The amount of additions to right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2020-01-01 -Paragraph 53 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_h&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_AdditionsToRightofuseAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Noncash investing activities. + References No definition available. + Details
Name: | phi_NoncashInvestingActivitiesAbstract
Namespace Prefix: | phi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration