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Income and Expenses - Summary of Revenues from Contracts with Customers (Detail) - PHP (₱)
₱ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers ₱ 216,833 ₱ 210,953 ₱ 204,362
Service Revenue [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 208,382 201,832 195,344
Non-service Revenue [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 8,451 9,121 9,018
Transferred over Time [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 208,382 201,832 195,344
Transferred at a Point Time [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 8,451 9,121 9,018
Elimination of intersegment amounts [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers (15,391) (14,182) (27,722)
Elimination of intersegment amounts [Member] | Service Revenue [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers (15,391) (14,181) (27,722)
Elimination of intersegment amounts [Member] | Non-service Revenue [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers   (1)  
Elimination of intersegment amounts [Member] | Transferred over Time [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers (15,391) (14,181) (27,722)
Elimination of intersegment amounts [Member] | Transferred at a Point Time [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers   (1)  
Wireless [Member] | Operating Segments [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 105,734 104,401 104,274
Wireless [Member] | Operating Segments [Member] | Service Revenue [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 97,779 95,677 95,852
Wireless [Member] | Operating Segments [Member] | Non-service Revenue [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 7,955 8,724 8,422
Wireless [Member] | Operating Segments [Member] | Transferred over Time [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 97,779 95,677 95,852
Wireless [Member] | Operating Segments [Member] | Transferred at a Point Time [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 7,955 8,724 8,422
Fixed Line [Member] | Operating Segments [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 126,490 120,734 127,810
Fixed Line [Member] | Operating Segments [Member] | Service Revenue [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 125,994 120,336 127,214
Fixed Line [Member] | Operating Segments [Member] | Non-service Revenue [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 496 398 596
Fixed Line [Member] | Operating Segments [Member] | Transferred over Time [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers 125,994 120,336 127,214
Fixed Line [Member] | Operating Segments [Member] | Transferred at a Point Time [Member]      
Disclosure Of Disaggregation Of Revenue From Contracts With Customers [Line Items]      
Total revenues from contracts with customers ₱ 496 ₱ 398 ₱ 596