Investment in Debt Securities and Other Long-term Investments - Summary of Investment in Debt Securities and Other Long-term Investments (Detail) - PHP (₱) ₱ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of detailed information about financial instruments [Line Items]
Investment in debt securities and other long-term investments	₱ 150	₱ 250
Current portion of investment in debt securities and other long-term investments (Note 12)		100
Investment in debt securities and other long-term investments – net of current portion (Note 12)	150	150
Seven Year GT Capital Bond [Member]
Disclosure of detailed information about financial instruments [Line Items]
Investment in debt securities and other long-term investments	₱ 150	150
Security Bank Corporation Time Deposits [Member]
Disclosure of detailed information about financial instruments [Line Items]
Investment in debt securities and other long-term investments		₱ 100

The amount of current investments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_CurrentInvestments
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfFinancialInstrumentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of investments other than investments accounted for using the equity method. [Refer: Investments accounted for using equity method]

+ References

+ Details

Name:	ifrs-full_InvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of non-current investments other than investments accounted for using the equity method. [Refer: Investments accounted for using equity method; Non-current assets; Investments other than investments accounted for using equity method]

+ References

+ Details

Name:	ifrs-full_NoncurrentInvestmentsOtherThanInvestmentsAccountedForUsingEquityMethod
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	invest_InvestmentIssuerAxis=phi_SevenYearGTCapitalBondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	invest_InvestmentIssuerAxis=phi_SecurityBankFiveYearTermDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: