XML 128 R161.htm IDEA: XBRL DOCUMENT v3.20.1
Deferred Credits and Other Noncurrent Liabilities - Summary of Changes to Provision for Asset Retirement Obligations (Detail) - PHP (₱)
₱ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Subclassifications Of Assets Liabilities And Equities [Abstract]    
Provision for asset retirement obligations at beginning of the year ₱ 1,656 ₱ 1,630
Additional liability 154 161
Accretion expenses 82 47
Settlement of obligations and others (125) (182)
Provision for asset retirement obligations at end of the year ₱ 1,767 ₱ 1,656