Pension and Other Employee Benefits - Summary of Unlisted Equity Investments of Defined Benefit Pension Plans (Detail) - PHP (₱) ₱ in Millions	Dec. 31, 2025	Dec. 31, 2024
Disclosure Of Fair Value Of Plan Assets [Line Items]
Unlisted Equity Investments	₱ 52,425	₱ 52,764
MediaQuest PDRs [Member]
Disclosure Of Fair Value Of Plan Assets [Line Items]
% of Ownership	100.00%	100.00%
Unlisted Equity Investments	₱ 6,970	₱ 7,304
Tahanan Mutual Building and Loan Association, Inc [member]
Disclosure Of Fair Value Of Plan Assets [Line Items]
% of Ownership	100.00%	100.00%
Unlisted Equity Investments	₱ 773	₱ 722
BTF Holdings, Inc. [Member]
Disclosure Of Fair Value Of Plan Assets [Line Items]
% of Ownership	100.00%	100.00%
Unlisted Equity Investments	₱ 2,759	₱ 2,748
Unquoted Equity Investments [Member]
Disclosure Of Fair Value Of Plan Assets [Line Items]
Unlisted Equity Investments	₱ 10,502	₱ 10,774

The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]