Income and Expenses - Summary of Asset Impairment (Detail) - PHP (₱) ₱ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Analysis Of Income And Expense [Abstract]
Property and equipment (Note 9)	₱ 3,913		₱ 5,788
Trade and other receivables (Notes 17 and 28)	3,438	₱ 8,027	3,391
Inventories and supplies (Note 18)	907	1,941	511
Goodwill and intangible assets (Note 15)		1,038
Others		36
Total asset impairment	₱ 8,258	₱ 11,042	₱ 9,690

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The amount of impairment loss recognised in profit or loss. [Refer: Impairment loss; Profit (loss)]

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The amount of impairment loss recognised in profit or loss for intangible assets and goodwill. [Refer: Impairment loss recognised in profit or loss; Intangible assets and goodwill]

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The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment]

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The amount of impairment loss recognised in profit or loss for trade receivables. [Refer: Impairment loss recognised in profit or loss; Trade receivables]

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The amount of expense recognised related to the write-down of inventories to net realisable value. [Refer: Inventories]

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Impairment of others.

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