Income and Expenses - Summary of Asset Impairment (Detail) - PHP (₱) ₱ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Analysis Of Income And Expense [Abstract]
Trade and other receivables (Note 17)	₱ 3,737	₱ 6,446	₱ 4,071
Inventories and supplies (Note 18)	847	934	471
Contract assets (Note 3)	253	266	291
Property and equipment (Note 9)	148
Total asset impairment	₱ 4,985	₱ 7,646	₱ 4,833

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The amount of impairment loss on receivables or contract assets arising from contracts with customers. [Refer: Contract assets; Impairment loss; Receivables from contracts with customers]

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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 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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