Debt Instruments at Amortized Cost - Summary of Debt Instruments at Amortized Cost (Detail) - PHP (₱) ₱ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure of detailed information about financial instruments [Line Items] | ||
| Investment in debt securities and other long-term investments | ₱ 370 | ₱ 395 |
| Less: Current portion of debt instrument at amortized cost (Note 27) | 20 | 25 |
| Noncurrent portion of debt instrument at amortized cost (Note 27) | 350 | 370 |
| Retail Treasury Bonds [Member] | ||
| Disclosure of detailed information about financial instruments [Line Items] | ||
| Investment in debt securities and other long-term investments | 340 | 340 |
| Fixed Rate Treasury Notes, or FXTN [Member] | ||
| Disclosure of detailed information about financial instruments [Line Items] | ||
| Investment in debt securities and other long-term investments | ₱ 30 | ₱ 55 |