Financial Assets and Liabilities - Summary of Derivative Financial Instruments by Classification (Detail) - PHP (₱) ₱ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation Of Fair Value Of Credit Derivative [Abstract]
Noncurrent assets	₱ 140	₱ 215
Current assets	183	171
Noncurrent liabilities		(8)
Current liabilities	(80)	(141)
Net assets	₱ 243	₱ 237	₱ 514

The fair value of a credit derivative. [Refer: At fair value [member]; Derivatives [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

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

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- Definition

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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- References

No definition available.

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