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Financial Instruments - Summary of Net Effect of Expired contracts that did not Meet Hedging Criteria for Accounting Purposes (Detail) - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of net effect of changes in fair value of derivative financial instruments that did not meet hedging criteria for accounting purposes [line items] |  |  |
Market value (loss) on financial instruments | $ 80 | $ (212) | $ (288)
Cross currency swaps and interest rate swaps |  |  |
Disclosure of net effect of changes in fair value of derivative financial instruments that did not meet hedging criteria for accounting purposes [line items] |  |  |
Market value (loss) on financial instruments | 0 | (212) | (293)
Embedded derivatives |  |  |
Disclosure of net effect of changes in fair value of derivative financial instruments that did not meet hedging criteria for accounting purposes [line items] |  |  |
Market value (loss) on financial instruments | $ 0 | $ 0 | $ 4

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- Definition The gains (losses) on financial assets at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 20 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_20_a_i&doctype=Standard -URIDate 2021-03-24 + Details
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