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Debt Instruments at Amortized Cost - Summary of Debt Instruments at Amortized Cost (Detail) - PHP (₱)
₱ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about financial instruments [Line Items]    
Investment in debt securities and other long-term investments ₱ 150 ₱ 150
Current portion of debt instruments at amortized cost (Note 13) 150  
Investment in debt securities and other long-term investments – net of current portion (Note 12)   150
Seven Year GT Capital Bond [Member]    
Disclosure of detailed information about financial instruments [Line Items]    
Investment in debt securities and other long-term investments ₱ 150 ₱ 150