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Taxes - Tax loss carryforwards, maturity (Details) - MXN ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | $ 42,813 | $ 31,323 | $ 30,041
Adjustments in deferred income tax assets | $ 1,547 | $ 1,816 |
NOLs usage limit | 30.00% |  |
2024 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | $ 963 |  |
2025 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 790 |  |
2026 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 635 |  |
2027 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 659 |  |
2028 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 484 |  |
2029 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 2,743 |  |
2030 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 3,323 |  |
2031 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 403 |  |
2032 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 3,283 |  |
2033 and thereafter |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 16,567 |  |
No expiration (Brazil and Colombia) |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | $ 12,963 |  |

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- Definition Line items represent concepts included in income taxes. + References No definition available. + Details
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- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2023-01-01 -Paragraph 81 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2023-en-r&anchor=para_81_e&doctype=Standard -URIDate 2023-03-23 + Details
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