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Investments in Associates and Joint Ventures - Summary of Expected Credit Losses of Financial Assets (Detail) - PHP (₱) ₱ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Joint Ventures [Line Items]
Balances as at beginning of the year	₱ 16,739
Balances at end of the year	17,202	₱ 16,739
Metro Pacific Investments Corporation [Member]
Disclosure Of Joint Ventures [Line Items]
Balances as at beginning of the year	2	4
Provisions	1
Financial assets derecognized during the year	(1)	(2)
Balances at end of the year	2	2
Metro Pacific Investments Corporation [Member] | Stage 1 [Member] | 12-Month ECL [Member]
Disclosure Of Joint Ventures [Line Items]
Balances as at beginning of the year	2	4
Provisions	1
Financial assets derecognized during the year	(1)	(2)
Balances at end of the year	₱ 2	₱ 2

X

- Definition

The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 16
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-URIDate 2019-03-27

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- 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

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- Definition

The decrease in an allowance account for credit losses of financial assets resulting from the reversal of impairment. [Refer: Allowance account for credit losses of financial assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b
-URIDate 2019-03-27

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- Definition

Provisions for allowance account for credit losses of financial assets.

+ References

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