Financial Assets and Liabilities - Summary of Consolidated Foreign Currency-denominated Monetary Financial Assets and Liabilities (Parenthetical) (Detail)	12 Months Ended
Dec. 31, 2019 PHP (₱)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 PHP (₱)	Dec. 31, 2018 USD ($)
Disclosure Of Pre Tax Exposure To Foreign Currency Exchange Risk On Financial Instruments [Line Items]
Weighted Average Foreign Exchange Rate	50.80	1.00
Foreign currency exchange risk [Member]
Disclosure Of Pre Tax Exposure To Foreign Currency Exchange Risk On Financial Instruments [Line Items]
Weighted Average Foreign Exchange Rate	50.80	1.00	52.56	1.00

The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2019-03-27

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