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Valuation of derivatives interest cost from labor obligations and other financial items net - Schedule of Valuation of Derivatives and Other Financial Items (Detail) $ in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2020 MXN ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 MXN ($) | Dec. 31, 2018 MXN ($)
Disclosure of detailed information about financial instruments [abstract] |  |  |  |
(Loss) gain in valuation of derivatives, net | $ 12,378,193 |  | $ 4,432,023 | $ (4,686,407)
Capitalized interest expense (Note 10 b) | 1,771,613 |  | 2,233,358 | 2,020,288
Commissions | (1,135,082) |  | (2,820,477) | (1,901,473)
Interest cost of labor obligations (Note 18) | (13,105,693) |  | (11,377,054) | (9,968,526)
Interest expense on taxes | (59,032) |  | (516,522) | (555,921)
Dividend received (Note 4) | 2,122,826 |  | 1,773,336 | 2,605,333
Gain on net monetary positions | 3,262,512 | $ 164 | 4,267,194 | 4,429,145
Other financial cost | (3,944,229) |  | (5,067,200) | (2,118,755)
Total | $ 1,291,108 | $ 65 | $ (7,075,342) | $ (10,176,316)

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- Definition Interest costs of labor obligations. + References No definition available. + Details
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- Definition Interest expense on taxes. + References No definition available. + Details
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- Definition Net finance cost on gross debt including related derivatives. + References No definition available. + Details
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- Definition Valuation of derivatives, interest cost from labor obligations and other financial items, net. + References No definition available. + Details
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- Definition The amount of expense relating to fees and commissions. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_85&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The gains (losses) representing the difference resulting from the restatement of non-monetary assets, owners' equity and items in the statement of comprehensive income and the adjustment of index linked assets and liabilities in hyperinflationary reporting. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 29 -IssueDate 2020-01-01 -Paragraph 9 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=29&code=ifrs-tx-2020-en-r&anchor=para_9&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The gains resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_85&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of interest costs that an entity incurs in connection with the borrowing of funds that are directly attributable to the acquisition, construction or production of a qualifying asset and which form part of the cost of that asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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