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Financial Assets and Liabilities - Summary of Derivative Financial Instruments (Parenthetical) (Detail) | 12 Months Ended
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Dec. 31, 2022 PHP (₱) USD ($) | Dec. 31, 2021 PHP (₱) | Dec. 31, 2020 PHP (₱)
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 1.00 |  |
Net Mark-to- market Gains (Losses) | ₱ (1,069,000,000) | ₱ (74,000,000) |
Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Net Mark-to- market Gains (Losses) | (881,000,000) | 51,000,000 |
Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Net Mark-to- market Gains (Losses) | (188,000,000) | (125,000,000) |
PLDT [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Net Mark-to- market Gains (Losses) | (360,000,000) | 14,000,000 |
PLDT [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Net Mark-to- market Gains (Losses) | (265,000,000) | (178,000,000) |
Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Net Mark-to- market Gains (Losses) | (521,000,000) | 37,000,000 |
Smart [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Net Mark-to- market Gains (Losses) | 77,000,000 | 53,000,000 |
Interest Rate Swap Contract [Member] | PLDT [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Mark-to-market loss/gain | 0 | 1,000,000 |
Interest accrual | 0 | 3,000,000 |
Hedge cost portion of the movements in the fair value | 0 | 0 | ₱ 0
Interest Rate Swap Contract [Member] | Smart [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Mark-to-market loss/gain | 0 | 0 |
Interest accrual | 0 | 0 |
Hedge cost portion of the movements in the fair value | 0 | 0 | 0
Long Term Currency Swaps | PLDT [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Mark-to-market loss/gain | 0 | 4,000,000 |
Interest accrual | 0 | 2,000,000 |
Hedge cost portion of the movements in the fair value | 0 | 500,000 | 2,000,000
Long Term Currency Swaps | Smart [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Mark-to-market loss/gain | 0 | 8,000,000 |
Interest accrual | 0 | 201,000 |
Hedge cost portion of the movements in the fair value | ₱ 0 | 309,000 | 1,000,000
Termination Date Various Dates in April and May 2022 [Member] | US Dollar Liabilities [Member] | Various Dates In November 2021 [Member] | Subsidized Forwards | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 50.38 |  |
Termination Date January 23, 2031 [Member] | Long Term Foreign Currency Options | PLDT [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Mark-to-market loss/gain | ₱ 190,000,000 | 100,000,000 |
Interest accrual | 75,000,000 | 75,000,000 |
Hedge cost portion of the movements in the fair value | 4,000,000 | 89,000,000 | ₱ 26,000,000
Termination Date December 13, 2030 [Member] | Long Term Foreign Currency Options | Smart [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Mark-to-market loss/gain | 81,000,000 | 48,000,000 |
Interest accrual | 3,000,000 | 4,000,000 |
Hedge cost portion of the movements in the fair value | ₱ 5,000,000 | 8,000,000 |
Condition One | Termination Date Various Dates in April and May 2022 [Member] | US Dollar Liabilities [Member] | Various Dates In November 2021 [Member] | Subsidized Forwards | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 51.65 |  |
Net Mark-to- market Gains (Losses) |  | ₱ (1,000,000) |
Condition One | Termination Date Various Dates in May Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in October 2021 [Member] | Foreign Exchange Options Seagull | PLDT [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 52.96 |  |
Condition One | Termination Date Various Dates in May Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in October 2021 [Member] | Bottom of range [member] | Foreign Exchange Options Seagull | PLDT [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 52.96 |  |
Condition One | Termination Date Various Dates in May Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in October 2021 [Member] | Top of range [member] | Foreign Exchange Options Seagull | PLDT [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 54.00 |  |
Condition One | Termination Date Various Dates in Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various Dates In November 2021 [Member] | Subsidized Forwards | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Exchange rate, description | Php50.38 plus the excess above Php51.65 |  |
Condition One | Termination Date Various Dates in Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various Dates In November 2021 [Member] | Bottom of range [member] | Subsidized Forwards | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 51.65 |  |
Condition One | Termination Date Various Dates in Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in November to December 2021 [Member] | Seagull | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 53.37 |  |
Condition One | Termination Date Various Dates in Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in November to December 2021 [Member] | Bottom of range [member] | Seagull | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 53.37 |  |
Condition One | Termination Date Various Dates in Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in November to December 2021 [Member] | Top of range [member] | Seagull | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 54.46 |  |
Condition One | Termination Date January 23, 2031 [Member] | US Dollar Liabilities [Member] | Various dates in July 2020 and February to March 2021 [Member] | Long Term Foreign Currency Options | PLDT [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 49.61 |  |
Condition One | Termination Date January 23, 2031 [Member] | US Dollar Liabilities [Member] | Various dates in July 2020 and February to March 2021 [Member] | Bottom of range [member] | Long Term Foreign Currency Options | PLDT [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 49.61 |  |
Condition One | Termination Date January 23, 2031 [Member] | US Dollar Liabilities [Member] | Various dates in July 2020 and February to March 2021 [Member] | Top of range [member] | Long Term Foreign Currency Options | PLDT [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 55.28 |  |
Condition One | Termination Date December 13, 2030 [Member] | US Dollar Liabilities [Member] | February To April Two Thousand Twenty One | Long Term Foreign Currency Options | Smart [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 48.00 |  |
Condition One | Termination Date December 13, 2030 [Member] | US Dollar Liabilities [Member] | February To April Two Thousand Twenty One | Bottom of range [member] | Long Term Foreign Currency Options | Smart [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 48.00 |  |
Condition One | Termination Date December 13, 2030 [Member] | US Dollar Liabilities [Member] | February To April Two Thousand Twenty One | Top of range [member] | Long Term Foreign Currency Options | Smart [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 53.34 |  |
Condition Two | Termination Date Various Dates in May Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in October 2021 [Member] | Foreign Exchange Options Seagull | PLDT [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Exchange rate, description | Php52.96 plus the excess above Php54.00 |  |
Condition Two | Termination Date Various Dates in May Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in October 2021 [Member] | Bottom of range [member] | Foreign Exchange Options Seagull | PLDT [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 54.00 |  |
Condition Two | Termination Date Various Dates in Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various Dates In November 2021 [Member] | Subsidized Forwards | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 50.38 |  |
Condition Two | Termination Date Various Dates in Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various Dates In November 2021 [Member] | Bottom of range [member] | Subsidized Forwards | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 51.65 |  |
Condition Two | Termination Date Various Dates in Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various Dates In November 2021 [Member] | Top of range [member] | Subsidized Forwards | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 51.65 |  |
Condition Two | Termination Date Various Dates in Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in November to December 2021 [Member] | Seagull | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Exchange rate, description | Php53.37 plus the excess above Php54.46 |  |
Condition Two | Termination Date Various Dates in Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in November to December 2021 [Member] | Bottom of range [member] | Seagull | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 54.46 |  |
Condition Two | Termination Date January 23, 2031 [Member] | US Dollar Liabilities [Member] | Various dates in July 2020 and February to March 2021 [Member] | Long Term Foreign Currency Options | PLDT [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Foreign exchange rate subsidy | 5.67 |  |
Condition Two | Termination Date January 23, 2031 [Member] | US Dollar Liabilities [Member] | Various dates in July 2020 and February to March 2021 [Member] | Bottom of range [member] | Long Term Foreign Currency Options | PLDT [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 55.28 |  |
Condition Two | Termination Date December 13, 2030 [Member] | US Dollar Liabilities [Member] | February To April Two Thousand Twenty One | Long Term Foreign Currency Options | Smart [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Foreign exchange rate subsidy | 5.34 |  |
Condition Two | Termination Date December 13, 2030 [Member] | US Dollar Liabilities [Member] | February To April Two Thousand Twenty One | Bottom of range [member] | Long Term Foreign Currency Options | Smart [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 53.34 |  |
Condition Three | Termination Date Various Dates in May Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in October 2021 [Member] | Foreign Exchange Options Seagull | PLDT [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 52.64 |  |
Condition Three | Termination Date Various Dates in May Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in October 2021 [Member] | Top of range [member] | Foreign Exchange Options Seagull | PLDT [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 52.96 |  |
Condition Three | Termination Date Various Dates in Two Thousand Twenty Two [Member] | US Dollar Liabilities [Member] | Various dates in November to December 2021 [Member] | Seagull | Smart [Member] | Transactions Not Designated As Hedges [Member] |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 52.82 |  |
Condition Three | Termination Date January 23, 2031 [Member] | US Dollar Liabilities [Member] | Various dates in July 2020 and February to March 2021 [Member] | Top of range [member] | Long Term Foreign Currency Options | PLDT [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 49.61 |  |
Condition Three | Termination Date December 13, 2030 [Member] | US Dollar Liabilities [Member] | February To April Two Thousand Twenty One | Top of range [member] | Long Term Foreign Currency Options | Smart [Member] | Transactions Designated As Hedges |  |  |
Disclosure of detailed information about financial instruments [Line Items] |  |  |
Weighted Average Foreign Exchange Rate | 48.00 |  |

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