Financial Assets and Liabilities - Summary of Consolidated Offsetting of Financial Assets and Liabilities (Detail) - PHP (₱) ₱ in Millions	Dec. 31, 2020	Dec. 31, 2019
Current Financial Assets [Member] \| Trade and Other Receivables [Member]
Schedule Of Offsetting Of Financial Assets And Financial Liabilities [Line Items]
Gross amounts of recognized financial assets	₱ 7,878	₱ 6,875
Gross amounts of recognized financial assets set-off in the consolidated statements of financial position	6,429	4,557
Net amount presented in the consolidated statements of financial position	1,449	2,318
Current Financial Assets [Member] \| Trade and Other Receivables [Member] \| Foreign administrations [Member]
Schedule Of Offsetting Of Financial Assets And Financial Liabilities [Line Items]
Gross amounts of recognized financial assets	7,161	5,857
Gross amounts of recognized financial assets set-off in the consolidated statements of financial position	5,877	4,338
Net amount presented in the consolidated statements of financial position	1,284	1,519
Current Financial Assets [Member] \| Trade and Other Receivables [Member] \| Domestic carriers [Member]
Schedule Of Offsetting Of Financial Assets And Financial Liabilities [Line Items]
Gross amounts of recognized financial assets	717	1,018
Gross amounts of recognized financial assets set-off in the consolidated statements of financial position	552	219
Net amount presented in the consolidated statements of financial position	165	799
Current Financial Liabilities [Member] \| Accounts payable [Member]
Schedule Of Offsetting Of Financial Assets And Financial Liabilities [Line Items]
Gross amounts of recognized financial liabilities	82,522	79,558
Gross amounts of recognized financial liabilities set-off in the consolidated statements of financial position	2,771	3,776
Net amount presented in the consolidated statements of financial position	79,751	75,782
Current Financial Liabilities [Member] \| Accounts payable [Member] \| Suppliers and contractors [Member]
Schedule Of Offsetting Of Financial Assets And Financial Liabilities [Line Items]
Gross amounts of recognized financial liabilities	75,394	68,121
Gross amounts of recognized financial liabilities set-off in the consolidated statements of financial position	72	70
Net amount presented in the consolidated statements of financial position	75,322	68,051
Current Financial Liabilities [Member] \| Accounts payable [Member] \| Carriers and other customers [Member]
Schedule Of Offsetting Of Financial Assets And Financial Liabilities [Line Items]
Gross amounts of recognized financial liabilities	7,128	11,437
Gross amounts of recognized financial liabilities set-off in the consolidated statements of financial position	2,699	3,706
Net amount presented in the consolidated statements of financial position	₱ 4,429	₱ 7,731

The amount of financial assets set off against financial liabilities when an entity: (a) currently has a legally enforceable right to set off the recognised amounts; and (b) intends either to settle on a net basis, or to realise the asset and settle the liability simultaneously. [Refer: Financial assets; Financial liabilities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 13C
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_13C_b&doctype=Standard
-URIDate 2020-01-01

+ Details

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

- Definition

The gross amount of recognised financial assets that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 13C
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_13C_a&doctype=Standard
-URIDate 2020-01-01

+ Details

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

- Definition

The amount of financial liabilities set off against financial assets when an entity: (a) currently has a legally enforceable right to set off the recognised amounts; and (b) intends either to settle on a net basis or to realise the asset and settle the liability simultaneously. [Refer: Financial assets; Financial liabilities]

+ References

+ Details

Name:	ifrs-full_GrossFinancialLiabilitiesSetOffAgainstFinancialAssetsSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The gross amount of recognised financial liabilities that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement. [Refer: Financial liabilities]

+ References

+ Details

Name:	ifrs-full_GrossFinancialLiabilitiesSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreements
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The net amount of financial assets that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement, presented in the statement of financial position. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Paragraph 13C
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_13C_c&doctype=Standard
-URIDate 2020-01-01

+ Details

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

- Definition

The net amount of financial liabilities that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement, presented in the statement of financial position. [Refer: Financial liabilities]

+ References

+ Details

Name:	ifrs-full_NetFinancialLiabilitiesSubjectToOffsettingEnforceableMasterNettingArrangementsOrSimilarAgreementsInStatementOfFinancialPosition
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Schedule of offsetting of financial assets and financial liabilities.

+ References

No definition available.

+ Details

Name:	phi_ScheduleOfOffsettingOfFinancialAssetsAndFinancialLiabilitiesLineItems
Namespace Prefix:	phi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=phi_CurrentFinancialAssetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfFinancialAssetsAxis=phi_CurrentTradeAndOtherReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CounterpartiesAxis=phi_ForeignAdministrationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CounterpartiesAxis=phi_DomesticCarriersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_AssetsAndLiabilitiesAxis=phi_CurrentFinancialLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfFinancialAssetsAxis=phi_AccountsPayable1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CounterpartiesAxis=phi_SuppliersAndContractorsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CounterpartiesAxis=phi_CarriersAndOtherCustomersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: