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Financial Assets and Liabilities - Summary of Movements of Consolidated Mark-to-Market Gains (Losses) (Detail) - PHP (₱) ₱ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Changes In Fair Value Of Credit Derivative [Abstract] |  |  |
Net mark-to-market gains at beginning of the year | ₱ 243 | ₱ 237 |
Effective portion recognized in the profit or loss for the cash flow hedges | 14 | 27 |
Gains (losses) on derivative financial instruments (Note 4) | (233) | 1,135 | ₱ 724
Net fair value losses on cash flow hedges (Note 28) | (330) | (286) | (411)
Settlements, interest expense and others | 235 | (870) |
Net mark-to-market gains (losses) at end of the year | ₱ (71) | ₱ 243 | ₱ 237

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- Definition The fair value of a credit derivative. [Refer: At fair value [member]; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 24G -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_24G_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of other comprehensive income, before tax, related to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income, before tax] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 91 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_91_b&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard -URIDate 2019-03-27 + Details
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