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Financial Assets And Liabilities - Summary of Effect of the Cash Flow Hedge in Consolidated Statements of Financial Position and Statements of Other Comprehensive Income (Detail) - Foreign currency exchange risk [Member] - Cash Flow Hedges Member [Member] - PHP (₱)
₱ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure Of Hedge Accounting [Line Items]    
Total hedging loss recognized in OCI ₱ (1,741) ₱ (764)
Long Term Currency Swaps    
Disclosure Of Hedge Accounting [Line Items]    
Total hedging loss recognized in OCI ₱ (301) ₱ (350)
Line item in our Consolidated Statements of Financial Position Other comprehensive loss Other comprehensive loss
Long Term Foreign Currency Options    
Disclosure Of Hedge Accounting [Line Items]    
Total hedging loss recognized in OCI ₱ (1,440) ₱ (414)
Line item in our Consolidated Statements of Financial Position Other comprehensive loss Other comprehensive loss