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Inventories and Supplies - Summary of Cost of Inventories and Supplies Recognized as Expense (Detail) - PHP (₱) ₱ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Classes Of Inventories [Abstract] |  |  |
Cost of sales | ₱ 8,882 | ₱ 9,528 | ₱ 10,630
Provisions (Note 5) | 934 | 471 | 1,528
Repairs and maintenance | 613 | 823 | 688
Selling and promotions | 3 | 138 | 43
Inventories and supplies recognized as expense | ₱ 10,432 | ₱ 10,960 | ₱ 12,889

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- Definition The amount of inventories recognised as an expense during the period. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2020-01-01 -Paragraph 36 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2020-en-r&anchor=para_36_d&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of expense recognised related to the write-down of inventories to net realisable value. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2020-01-01 -Paragraph 36 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2020-en-r&anchor=para_36_e&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_98_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition Inventory selling and promotions. + References No definition available. + Details
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