Investments in Associates and Joint Ventures - Carrying Value of Investments in Associates (Parenthetical) (Detail) - PHP (₱) ₱ in Millions	Dec. 31, 2022	Dec. 02, 2022	Aug. 10, 2022	Jul. 06, 2022	Dec. 31, 2021
Multisys [Member]
Disclosure of Investments in Associates and Joint Ventures [Line Items]
Subscription payable	₱ 261	₱ 620	₱ 620	₱ 620	₱ 620