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Taxes - Deferred tax related to OCI (Details) - MXN ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of income taxes [Line Items] |  |  |  |
Deferred tax (liability)/asset, net | $ 20,227 | $ 20,067 | $ 14,691 | $ 16,010
Accumulated other comprehensive income |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |
Deferred tax (liability)/asset, net | 3,332 | 3,323 |  |
Accumulated other comprehensive income | Valuation of the effective portion of derivative financial instrument |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |
Deferred tax (liability)/asset, net | 324 | 688 |  |
Accumulated other comprehensive income | Remeasurements of the net defined benefit liability |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |
Deferred tax (liability)/asset, net | (221) | (251) |  |
Accumulated other comprehensive income | Exchange differences on translation of foreign operations |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |
Deferred tax (liability)/asset, net | 1,828 | 3,778 |  |
Accumulated other comprehensive income | Gain on hedge of net investments in foreign operations |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |
Deferred tax (liability)/asset, net | 1,401 | 2,216 |  |
Accumulated other comprehensive income | Share of other comprehensive income of associated companies and joint ventures |  |  |  |
Disclosure of income taxes [Line Items] |  |  |  |
Deferred tax (liability)/asset, net | $ 0 | $ (3,108) |  |

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- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2023-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2023-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2023-03-23 + Details
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