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Goodwill and Intangible Assets - Additional Information (Detail) - PHP (₱) ₱ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2015
Accumulated depreciation, impairment and amortization [Member] | PLDT Inc. [Member] | Digital Telecommunications Phils., Inc. [Member]
Disclosure of detailed information about intangible assets [Line Items]
Accumulated impairment balance	₱ 438
Accumulated depreciation, impairment and amortization [Member] | ePLDT, Inc. [Member] | ABM Global Solutions, Inc. and Subsidiaries [Member]
Disclosure of detailed information about intangible assets [Line Items]
Accumulated impairment balance	216
Wireless [Member]
Disclosure of detailed information about intangible assets [Line Items]
Impairment loss relating to goodwill	₱ 0	₱ 0
Pre-tax discount rates applied to cash flow projections	8.22%
Growth rate of cash flows beyond the projection period	2.00%
Fixed Line [Member]
Disclosure of detailed information about intangible assets [Line Items]
Impairment loss relating to goodwill	₱ 0	₱ 0
Pre-tax discount rates applied to cash flow projections	8.22%
Growth rate of cash flows beyond the projection period	2.00%
Voyager [Member]
Disclosure of detailed information about intangible assets [Line Items]
Additional goodwill				₱ 980
Impairment loss relating to goodwill			₱ 980

X

- Definition

The amount of additional goodwill recognised, except goodwill included in a disposal group that, on acquisition, meets the criteria to be classified as held for sale in accordance with IFRS 5. [Refer: Goodwill; Disposal groups classified as held for sale [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ References

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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.

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- Definition

The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill]

+ References

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- Definition

The amount of impairment loss recognised in profit or loss for intangible assets and goodwill. [Refer: Impairment loss recognised in profit or loss; Intangible assets and goodwill]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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