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Interest-bearing Financial Liabilities - Additional Information (Detail) - PHP (₱)
₱ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Oct. 23, 2024
May 07, 2024
Mar. 06, 2024
Oct. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Nov. 30, 2022
Oct. 31, 2022
Jul. 31, 2022
Apr. 30, 2022
Mar. 31, 2022
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Secured loan facilities ₱ 370 ₱ 395                      
Unamortized Debt Discount ₱ 1,989 ₱ 2,129           ₱ 2,279          
Percentage of greenhouse gas emissions 40.00%                        
Percentage of dollar portion of debt 14.00% 15.00%                      
Percentage of unhedged portion of net debt 6.00% 5.00%                      
Percentage of net dollar cash balance of debt 5.00% 5.00%                      
Debt Transaction [Member]                          
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Unsecured short term debt                       ₱ 6,000 ₱ 4,000
Unsecured Short Term Debt [Member]                          
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Borrowings, interest rate                       2.60% 2.60%
Smart Inc [Member]                          
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Prepaid outstanding short-term debt                   ₱ 4,000      
Prepaid remaining short-term debt ₱ 0 ₱ 0       ₱ 2,000              
Smart Inc [Member] | Debt Transaction [Member]                          
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Unsecured short term debt                 ₱ 2,000        
Smart Inc [Member] | Unsecured Short Term Debt [Member]                          
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Borrowings, interest rate                 5.16%        
PLDT [Member]                          
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Prepaid outstanding short-term debt                     ₱ 2,000    
Prepaid remaining short-term debt ₱ 0 ₱ 0       ₱ 4,000              
PLDT [Member] | Debt Transaction [Member]                          
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Unsecured short term debt                 ₱ 4,000        
Short-term debt             ₱ 4,000            
PLDT [Member] | Unsecured Short Term Debt [Member]                          
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Borrowings, interest rate                 5.16%        
PLDT [Member] | HSBC Philippines [Member] | Green Loan Facilities [Member]                          
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Secured loan facilities         ₱ 1,000                
PLDT [Member] | HSBC Philippines [Member] | Social Loan Facility [Member]                          
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Secured loan facilities     ₱ 2,000                    
PLDT [Member] | Metropolitan Bank & Trust Company | Green Loan Facilities [Member]                          
Disclosure Of Detailed Information About Borrowings [Line Items]                          
Secured loan facilities       ₱ 4,000