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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The amount of investments in associates. [Refer: Associates [member]]

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Investments in Associates and Joint Ventures - Carrying Value of Investments in Associates (Detail) - PHP (₱) ₱ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Investments in associates and joint ventures
Carrying value of investments in associates	₱ 12,041	₱ 14,765
Carrying value of investments in joint ventures	34,089	42,093
Total carrying value of investments in associates and joint ventures	46,130	56,858	₱ 48,703
MediaQuest PDRs [Member]
Investments in associates and joint ventures
Carrying value of investments in associates	10,835	12,647
Total carrying value of investments in associates and joint ventures	8,696	8,267
Asia Outsourcing Beta Limited [Member]
Investments in associates and joint ventures
Carrying value of investments in associates	78	855
Digitel Crossing, Inc. [Member]
Investments in associates and joint ventures
Carrying value of investments in associates	510	238
Phunware [Member]
Investments in associates and joint ventures
Carrying value of investments in associates	384	384
Appcard [Member]
Investments in associates and joint ventures
Carrying value of investments in associates	234	234
AF Payments, Inc. [Member]
Investments in associates and joint ventures
Carrying value of investments in associates		407
VTI, Bow Arken and Brightshare [Member]
Investments in associates and joint ventures
Carrying value of investments in joint ventures	32,550	26,962
Philippines Internet Holding S.a.r.l. [Member]
Investments in associates and joint ventures
Carrying value of investments in joint ventures	₱ 1,539	1,538
Beacon Electric Asset Holdings, Inc. [Member]
Investments in associates and joint ventures
Carrying value of investments in joint ventures		₱ 13,593