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Financial Assets and Liabilities - Summary of Impact of Hedging Instruments (Detail) - Foreign currency exchange risk [Member]
₱ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
PHP (₱)
USD ($)
Dec. 31, 2023
PHP (₱)
USD ($)
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items]    
Carrying Amount ₱ 384 ₱ 84
Long Term Foreign Currency Options    
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items]    
Notional Amount | $ 356 367
Carrying Amount ₱ 384 ₱ 96
Line item in our Consolidated Statements of Financial Position Derivative financial assets – net of current portion Derivative financial assets – net of current portion
Derivative Financial Liabilities – Net of Current Portion [Member]    
Disclosure Of Information About Terms And Conditions Of Hedging Instruments And How They Affect Future Cash Flows [Line Items]    
Carrying Amount   ₱ (12)
Line item in our Consolidated Statements of Financial Position   Derivative financial liabilities – net of current portion