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Financial Instruments - Summary of Net Effect of Changes in Fair Value of Derivative Financial Instruments that did not Meet Hedging Criteria for Accounting Purposes (Detail) - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
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 | $ 67 | $ 169 | $ (672)
Derivatives Not Designated For Hedge Accounting | 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 | $ 938 | $ 141 | $ (2,270)

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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 2024-01-01 -Paragraph 20 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_20_a_i&doctype=Standard -URIDate 2024-03-27 + Details
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