Financial Assets and Liabilities - Summary of Derivative Financial Instruments by Classification (Detail) - PHP (₱) ₱ in Millions	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Hedge Accounting [Abstract]
Noncurrent assets	₱ 215	₱ 499
Current assets	171	242
Noncurrent liabilities	(8)	(2)
Current liabilities	(141)	(225)
Net assets	₱ 237	₱ 514

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 assets less the amount of liabilities.

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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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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