Income and Expenses - Summary of Cost of Sales and Services (Detail) - PHP (₱) ₱ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Analysis Of Income And Expense [Abstract]
Cost of computers, cellular handsets, cellular SIM -packs sold and broadband data modems (Note 18)	₱ 10,277	₱ 16,053	₱ 15,794
Cost of services (Note 18)	2,572	1,540	1,064
Cost of point-product-sales (Note 18)	784	700	579
Cost of satellite air time and terminal units (Note 25)			16
Total cost of sales and services	₱ 13,633	₱ 18,293	₱ 17,453

The amount of costs relating to expenses directly or indirectly attributed to the goods or services sold, which may include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, unallocated production overheads and abnormal amounts of production costs of inventories.

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