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]]

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Investments in Associates and Joint Ventures - Carrying Value of Investments in Associates (Detail) - PHP (₱) ₱ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 03, 2018	Nov. 08, 2018
Disclosure of Investments in Associates and Joint Ventures [Line Items]
Carrying value of investments in associates	₱ 16,992	₱ 18,777
Carrying value of investments in joint ventures	35,131	35,086
Total carrying value of investments in associates and joint ventures	52,123	53,863	₱ 55,427
VTI, Bow Arken and Brightshare [Member]
Disclosure of Investments in Associates and Joint Ventures [Line Items]
Carrying value of investments in joint ventures	32,625	32,538
Multisys [Member]
Disclosure of Investments in Associates and Joint Ventures [Line Items]
Carrying value of investments in joint ventures	2,466	2,538		₱ 550	₱ 2,150
Telecommunications Connectivity, Inc., or TCI [Member]
Disclosure of Investments in Associates and Joint Ventures [Line Items]
Carrying value of investments in joint ventures	40	10
MediaQuest PDRs [Member]
Disclosure of Investments in Associates and Joint Ventures [Line Items]
Carrying value of investments in associates	9,914	9,747
Total carrying value of investments in associates and joint ventures	9,955	10,050
VIH [Member]
Disclosure of Investments in Associates and Joint Ventures [Line Items]
Carrying value of investments in associates	6,702	8,219
Total carrying value of investments in associates and joint ventures	3,224	4,848
Digitel Crossing, Inc. [Member]
Disclosure of Investments in Associates and Joint Ventures [Line Items]
Carrying value of investments in associates	241	674
Appcard, Inc [Member]
Disclosure of Investments in Associates and Joint Ventures [Line Items]
Carrying value of investments in associates	102	102
Asia Outsourcing Beta Limited [Member]
Disclosure of Investments in Associates and Joint Ventures [Line Items]
Carrying value of investments in associates	₱ 33	₱ 35