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Financial Assets and Liabilities - Summary of Impact of Hedged Items on Consolidated Statements of Financial Position (Detail) - Interest rate risk [member] - PHP (₱) ₱ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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PLDT [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Cash flow hedge reserve | ₱ (1,303) | ₱ (745)
Cost of hedging reserve | 77 | 70
Smart [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Cash flow hedge reserve | (438) | (19)
Cost of hedging reserve | 4 | 15
US$300M Term Loan [Member] | PLDT [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Cash flow hedge reserve | (273) | (273)
Hundred PNB [Member] | PLDT [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Cash flow hedge reserve | (11) | (11)
Two Hundred MUFG Bank Ltd [Member] | PLDT [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Cash flow hedge reserve | (8) | (47)
Cost of hedging reserve | 2 | 6
US$300M Notes 2031 [Member] | PLDT [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Cash flow hedge reserve | (1,011) | (414)
Cost of hedging reserve | 75 | 64
Two Hundred Mizuho [Member] | Smart [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Cash flow hedge reserve |  | (1)
Hundred Mizuho [Member] | Smart [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Cash flow hedge reserve | (9) | (18)
Cost of hedging reserve |  | ₱ 15
US$140M PNB [Member] | Smart [Member] |  |
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items] |  |
Cash flow hedge reserve | (429) |
Cost of hedging reserve | ₱ 4 |

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- Definition A component of equity representing the accumulated portion of gain (loss) on a hedging instrument that is determined to be an effective hedge for cash flow hedges. [Refer: Cash flow hedges [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_78_e&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 9 -IssueDate 2021-01-01 -Paragraph 6.5.11 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2021-en-r&anchor=para_6.5.11&doctype=Standard -URIDate 2021-03-24 + Details
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