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Income Taxes - Additional Information (Detail) - PHP (₱) ₱ in Millions |  |  | 12 Months Ended | 36 Months Ended
--- | --- | --- | --- | ---
Jul. 01, 2020 | Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jun. 30, 2023
Disclosure Of Other Income Expense [Line Items] |  |  |  |  |  |
Excess MCIT deducted against RCIT |  |  | ₱ 1,426 | ₱ 206 | ₱ 488 |
Consolidated unrecognized deferred income tax assets |  |  | 1,940 | 2,294 |  |
Total excess MCIT |  |  | 23 |  |  |
Expired portion of excess MCIT |  |  | 1 | 10 | 1 |
Total NOLCO claimed as deduction against future taxable income |  |  | 1,670 |  |  |
Deduction against taxable income |  |  | 2,109 | 9,530 | 1,094 |
Expired portion of excess NOLCO |  |  | 1,170 | 973 | 1,272 |
Expiration amount of NOLCO incurred after five years |  |  | ₱ 188 |  |  |
Applicable tax rate |  |  | 30.00% |  |  |
Net taxable income |  |  | ₱ 9,906 | 9,701 | ₱ 6,845 |
Bottom of range [member] | CREATE Bill [Member] |  |  |  |  |  |
Disclosure Of Other Income Expense [Line Items] |  |  |  |  |  |
Lower MCIT rate |  |  |  |  |  | 1.00%
Top of range [member] | CREATE Bill [Member] |  |  |  |  |  |
Disclosure Of Other Income Expense [Line Items] |  |  |  |  |  |
Lower MCIT rate |  |  |  |  |  | 2.00%
Domestic and Foreign Corporations [Member] |  |  |  |  |  |
Disclosure Of Other Income Expense [Line Items] |  |  |  |  |  |
Applicable tax rate | 25.00% | 30.00% |  |  |  |
Small and Medium Domestic Corporations [Member] |  |  |  |  |  |
Disclosure Of Other Income Expense [Line Items] |  |  |  |  |  |
Lower income tax rate |  |  | 20.00% |  |  |
Net taxable income |  |  | ₱ 5 |  |  |
Small and Medium Domestic Corporations [Member] | Bottom of range [member] |  |  |  |  |  |
Disclosure Of Other Income Expense [Line Items] |  |  |  |  |  |
Net taxable income for assets excluding land |  |  | 100 |  |  |
DMPI and ePLDT [Member] |  |  |  |  |  |
Disclosure Of Other Income Expense [Line Items] |  |  |  |  |  |
Consolidated unrecognized deferred income tax assets |  |  | 209 | ₱ 1,988 |  |
VIH [Member] |  |  |  |  |  |
Disclosure Of Other Income Expense [Line Items] |  |  |  |  |  |
Unrecognized deferred income tax liability |  |  | ₱ 234 |  |  |
Subic Tel and 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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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2020-01-01 + Details
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