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Income Taxes - Additional Information (Detail) - PHP (₱) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure Of Other Income Expense [Line Items] |  |  |
Excess MCIT deducted against RCIT | ₱ 5,000,000 | ₱ 2,000,000 | ₱ 1,426,000,000
Unrecognized deferred income tax assets | 748,000,000 | 901,000,000 |
Total excess MCIT | 118,000,000 |  |
Expired portion of excess MCIT | 3,000,000 | 0 | 1,000,000
Total NOLCO claimed as deduction against future taxable income | 1,252,000,000 |  |
Deduction against taxable income | 42,000,000 | 556,000,000 | 2,109,000,000
Expired portion of excess NOLCO | 225,000 | 990,000,000 | ₱ 1,170,000,000
Expiration amount of NOLCO incurred after five years | ₱ 1,016,000,000 | 81,000,000 |
Extended period of carry over period for net operating loss carry over | 5 years |  |
Previous extended period of carry over period for net operating loss carry over | 3 years |  |
December Thirty One Two Thousand And Twenty Two Net [Member] |  |  |
Disclosure Of Other Income Expense [Line Items] |  |  |
Total excess MCIT | ₱ 118,000,000 |  |
Total NOLCO claimed as deduction against future taxable income | 1,097,000,000 |  |
DMPI and ePLDT [Member] |  |  |
Disclosure Of Other Income Expense [Line Items] |  |  |
Unrecognized deferred income tax assets | ₱ 135,000,000 | ₱ 201,000,000 |
Clark Tel [Member] |  |  |
Disclosure Of Other Income Expense [Line Items] |  |  |
Special income tax rate as percentage of gross sales | 5.00% |  |

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