v3.26.1
Pension and Other Employee Benefits - Summary of Plan Assets of Defined Benefit Pension Plans (Detail) - Defined Benefit Plan Assets [Member] - PHP (₱)
₱ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Noncurrent Financial Assets ₱ 13,417 ₱ 13,316
Current Financial Assets 559 512
Plan Assets of Defined Benefit Pension Plans 14,143 13,985
Smart and Subsidiaries [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Less: Employee’s share, forfeitures and mandatory reserve account 1,598 1,526
Total Plan Assets of Defined Contribution Plans 4,245 4,053
Smart and Subsidiaries [Member] | Non-current Financial Assets [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Plan Assets of Defined Benefit Pension Plans 5,532 5,295
Smart and Subsidiaries [Member] | Current Financial Assets [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Plan Assets of Defined Benefit Pension Plans 5,843 5,579
Parent [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Plan Assets of Defined Benefit Pension Plans 13,976 13,828
Subsidiaries [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Plan Assets of Defined Benefit Pension Plans 167 157
Unquoted Equity Investments [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Noncurrent Financial Assets 10,502 10,774
Shares of Stocks [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Noncurrent Financial Assets 2,288 1,983
Corporate Bonds [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Noncurrent Financial Assets 317 303
Mutual Funds [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Noncurrent Financial Assets 306 252
Government Securities [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Noncurrent Financial Assets 4 4
Cash and Cash Equivalent [member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Current Financial Assets 459 409
Cash and Cash Equivalent [member] | Smart and Subsidiaries [Member] | Current Financial Assets [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Plan Assets of Defined Benefit Pension Plans 311 284
Receivables [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Current Financial Assets 100 103
Receivables [Member] | Smart and Subsidiaries [Member] | Current Financial Assets [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Plan Assets of Defined Benefit Pension Plans 311 284
Domestic Fixed Income Investment [Member] | Smart and Subsidiaries [Member] | Non-current Financial Assets [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Plan Assets of Defined Benefit Pension Plans 2,479 2,655
Domestic Equities Investment [Member] | Smart and Subsidiaries [Member] | Non-current Financial Assets [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Plan Assets of Defined Benefit Pension Plans 813 738
International Equities Investment [Member] | Smart and Subsidiaries [Member] | Non-current Financial Assets [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Plan Assets of Defined Benefit Pension Plans 1,042 854
International Fixed Income Investment [Member] | Smart and Subsidiaries [Member] | Non-current Financial Assets [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Plan Assets of Defined Benefit Pension Plans 306 295
Philippine Foreign Currency Bonds Investment [Member] | Smart and Subsidiaries [Member] | Non-current Financial Assets [Member]    
Disclosure Of Fair Value Of Plan Assets [Line Items]    
Plan Assets of Defined Benefit Pension Plans ₱ 892 ₱ 753