Income Taxes - Summary of Analysis of Net Deferred Income Tax Liabilities (Detail) - PHP (₱) ₱ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Deferred income tax liabilities	₱ 165	₱ 204	₱ 169
Costs [Member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Deferred income tax liabilities	165	204
Costs [Member] | After 12 months [Member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Deferred income tax liabilities	₱ 165	221
Costs [Member] | Less than 1 year [Member]
Disclosure Of Temporary Difference Unused Tax Losses And Unused Tax Credits [Line Items]
Deferred income tax liabilities		₱ (17)