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Taxes - Components of Income Tax Expense (Details) $ in Millions, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 MXN ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 MXN ($) | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 MXN ($)
Disclosure Of Income Taxes [line items] |  |  |  |  |
Current tax expense |  |  | $ 13,657 | $ 18,690 | $ 11,652
Deferred tax expense (benefit): |  |  |  |  |
Origination and reversal of temporary differences |  |  | 2,115 | (5,824) | 127
Utilization (recognition) of tax losses, net |  |  | 1,498 | (1,994) | 1,201
Change in the statutory rate |  |  | 4 | (41) | (102)
Total deferred tax expense (benefit) |  |  | 621 | (3,871) | (1,176)
Total income taxes |  | $ 696 | $ 14,278 | $ 14,819 | $ 10,476
Mexico |  |  |  |  |
Disclosure Of Income Taxes [line items] |  |  |  |  |
Current tax expense | $ 5,500 |  |  |  |
Deferred tax expense (benefit): |  |  |  |  |
Total income taxes | 8,754 |  |  |  |
Penalties on income tax | 3,253 |  |  |  |
Restatement effects on income tax | $ 868 |  |  |  |

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