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Taxes - Tax loss carryforwards, maturity (Details) - MXN ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | $ 30,040 | $ 26,618 | $ 32,536
Adjustments in deferred income tax assets |  | $ 3,847 |
NOLs usage limit | 30.00% |  |
2023 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | $ 270 |  |
2024 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 224 |  |
2025 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 1,450 |  |
2026 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 5,639 |  |
2027 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 224 |  |
2028 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 794 |  |
2029 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 476 |  |
2030 |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 366 |  |
2031 and thereafter |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | 3,715 |  |
No expiration (Brazil and Colombia) |  |  |
Disclosure of income taxes [Line Items] |  |  |
Unused tax losses for which no deferred tax asset recognised | $ 16,882 |  |

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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 2021-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_e&doctype=Standard -URIDate 2021-03-24 + Details
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