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Financial Assets and Liabilities - Summary of Maximum Exposure to Credit Risk (Detail) - PHP (₱)
₱ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure ₱ 47,200 ₱ 47,203
Collateral and Other Credit Enhancements* 427 521
Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 47,627 47,724
Financial assets at amortised cost, category [member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 45,684 46,260
Collateral and Other Credit Enhancements* 427 521
Financial assets at amortised cost, category [member] | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 46,111 46,781
Financial assets at amortised cost, category [member] | Debt Instruments at Amortized Cost [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 395 595
Financial assets at amortised cost, category [member] | Debt Instruments at Amortized Cost [Member] | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 395 595
Financial assets at amortised cost, category [member] | Other Financial Assets [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 3,957 3,801
Financial assets at amortised cost, category [member] | Other Financial Assets [Member] | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 3,957 3,801
Financial assets at amortised cost, category [member] | Cash and Cash Equivalent [member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 9,967 16,031
Collateral and Other Credit Enhancements* 44 146
Financial assets at amortised cost, category [member] | Cash and Cash Equivalent [member] | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 10,011 16,177
Financial assets at amortised cost, category [member] | Short Term Investments1    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 136  
Financial assets at amortised cost, category [member] | Short Term Investments1 | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 136 122
Financial assets at amortised cost, category [member] | Corporate subscribers [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 14,677 9,650
Collateral and Other Credit Enhancements* 346 338
Financial assets at amortised cost, category [member] | Corporate subscribers [Member] | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 15,023 9,988
Financial assets at amortised cost, category [member] | Retail subscribers [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 7,613 10,159
Collateral and Other Credit Enhancements* 37 37
Financial assets at amortised cost, category [member] | Retail subscribers [Member] | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 7,650 10,196
Financial assets at amortised cost, category [member] | Foreign administrations [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 1,177 1,126
Financial assets at amortised cost, category [member] | Foreign administrations [Member] | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 1,177 1,126
Financial assets at amortised cost, category [member] | Domestic carriers [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 256 187
Financial assets at amortised cost, category [member] | Domestic carriers [Member] | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 256 187
Financial assets at amortised cost, category [member] | Dealers agents and others [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 7,506 4,589
Financial assets at amortised cost, category [member] | Dealers agents and others [Member] | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 7,506 4,589
financial assets at FVPL [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 1,516 943
financial assets at FVPL [Member] | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 1,516 943
financial assets at FVPL [Member] | Long Term Foreign Currency Options    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 385 96
financial assets at FVPL [Member] | Long Term Foreign Currency Options | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 385 96
financial assets at FVPL [Member] | Cash equivalents and short-term investments    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure   269
financial assets at FVPL [Member] | Cash equivalents and short-term investments | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure   269
financial assets at FVPL [Member] | Short Term Investments1    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure   122
financial assets at FVPL [Member] | Forward Foreign Exchange Contracts [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 30  
financial assets at FVPL [Member] | Forward Foreign Exchange Contracts [Member] | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 30  
financial assets at FVPL [Member] | Financial Assets at FVPL    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure 1,101 578
financial assets at FVPL [Member] | Financial Assets at FVPL | Costs [Member]    
Disclosure Of Credit Risk Exposure [Line Items]    
Maximum Exposure ₱ 1,101 ₱ 578