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Income and Expenses - Additional Information (Detail) - PHP (₱) ₱ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure Of Analysis Of Contract Balances [Abstract] |  |
Decrease in trade and other receivables | ₱ 7,703 |
Decrease in contract assets | 481 |
Contract liabilities and unearned revenues | 1,181 |
Current portion of contract liabilities and unearned revenues | 6,650 | ₱ 8,039
Noncurrent portion of contract liabilities and unearned revenues | ₱ 532 | ₱ 324

X
- Definition Current portion of contract liabilities and unearned revenues. + References No definition available. + Details
Name: | phi_CurrentPortionOfContractLiabilitiesAndUnearnedRevenues
Namespace Prefix: | phi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Disclosure of analysis of contract balances. + References No definition available. + Details
Name: | phi_DisclosureOfAnalysisOfContractBalancesAbstract
Namespace Prefix: | phi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase decrease in contract assets. + References No definition available. + Details
Name: | phi_IncreaseDecreaseInContractAssets
Namespace Prefix: | phi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase decrease in contract liabilities and unearned revenues. + References No definition available. + Details
Name: | phi_IncreaseDecreaseInContractLiabilitiesAndUnearnedRevenues
Namespace Prefix: | phi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase decrease in trade and other receivables. + References No definition available. + Details
Name: | phi_IncreaseDecreaseInTradeAndOtherReceivables
Namespace Prefix: | phi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Non-current portion of contract liabilities and unearned revenues. + References No definition available. + Details
Name: | phi_NonCurrentPortionOfContractLiabilitiesAndUnearnedRevenues
Namespace Prefix: | phi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant