The amount of direct operating expenses (including repairs and maintenance) arising from investment property that did not generate rental income during the period recognised in profit or loss. [Refer: Investment property]

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The amount of property, plant and equipment representing land held by the entity for use in operations. [Refer: Property, plant and equipment]

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The amount of transfers of assets into Level 3 of the fair value hierarchy. [Refer: Level 3 of fair value hierarchy [member]]

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Investment Properties - Additional Information (Detail) - PHP (₱)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Investment Property [Line Items]
Repairs and maintenance expenses related to investment properties that do not generate rental income	₱ 27,000,000	₱ 23,000,000	₱ 29,000,000
Investment Property [member]
Disclosure Of Investment Property [Line Items]
Transfers into of Level 3 of fair value hierarchy, investment properties	0
Transfers out of Level 3 of fair value hierarchy, investment properties	0
Market Approach Using Price Per Square Meter [Member] \| Bottom of Range [Member]
Disclosure Of Investment Property [Line Items]
Valuation for land, price per square meter	23,000
Market Approach Using Price Per Square Meter [Member] \| Top of Range [Member]
Disclosure Of Investment Property [Line Items]
Valuation for land, price per square meter	₱ 475,000