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Pension and Other Employee Benefits - Summary of Shares of Stocks of Defined Benefit Pension Plans (Detail) - PHP (₱) ₱ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure Of Fair Value Of Plan Assets [Line Items] |  |
Shares of stocks | ₱ 1,983 | ₱ 2,017
Preferred Stock [Member] |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |
Shares of stocks | 360 | 360
PSE [member] | Common Stock [Member] |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |
Shares of stocks | 1,093 | 1,134
Parent [Member] | Common Stock [Member] |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |
Shares of stocks | 34 | 34
Others [Member] | Common Stock [Member] |  |
Disclosure Of Fair Value Of Plan Assets [Line Items] |  |
Shares of stocks | ₱ 496 | ₱ 489

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