Financial Assets and Liabilities - Summary of Derivative Financial Instruments by Classification (Detail) - PHP (₱) ₱ in Millions	Dec. 31, 2020	Dec. 31, 2019
Reconciliation Of Fair Value Of Credit Derivative [Abstract]
Noncurrent assets		₱ 1
Current assets	₱ 22	41
Noncurrent liabilities (Note 29)	(360)	(25)
Current liabilities (Note 29)	(176)	(88)
Net liabilities	₱ (514)	₱ (71)

The amount of current derivative financial assets. [Refer: Derivative financial assets]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The amount of current derivative financial liabilities. [Refer: Derivative financial liabilities]

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The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]]

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The amount of non-current derivative financial assets. [Refer: Derivative financial assets]

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The amount of non-current derivative financial liabilities. [Refer: Derivative financial liabilities]

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