Equity - Summary of Number of Shares of Subscribed and Outstanding Capital Stock (Parenthetical) (Detail) - PHP (₱) ₱ in Millions, shares in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure Of Classes Of Share Capital [Line Items] | ||
| Number of shares issued | 1,093 | 1,093 |
| Series IV Cumulative Non-Convertible Redeemable Preferred Stock [Member] | ||
| Disclosure Of Classes Of Share Capital [Line Items] | ||
| Number of shares issued | 300 | |
| Initial capitalization amount | ₱ 3,000 | |
| Number of shares issued, paid | 360 | |
| Subscription payable | ₱ 2,640 | ₱ 2,640 |