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Income Taxes - Summary of Analysis of Temporary Differences Giving Rise to Net Deferred Tax Liability (Detail) - MXN ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax assets | $ 116,614,520 | $ 98,415,751 | $ 77,822,839
Deferred tax benefit in net profit for the year | 13,810,280 | 1,455,448 | 15,035,341
Deferred tax from discontinued operations | 0 | 1,808,298 | 4,731,603
Provisions [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax assets | 29,562,781 | 18,813,454 |
Deferred tax benefit in net profit for the year | 15,065,996 | 1,759,784 | 1,812,523
Deferred revenues [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax assets | 8,691,188 | 8,153,287 |
Deferred tax benefit in net profit for the year | 1,767 | (688,767) | 2,202,413
Tax losses carry forward [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax assets | 36,970,123 | 33,314,653 |
Deferred tax benefit in net profit for the year | 8,575,209 | 1,202,546 | 5,571,115
Property, plant and equipment [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax assets | (8,699,418) | (18,840,025) |
Deferred tax benefit in net profit for the year | 2,157,776 | 1,696,734 | 8,016,244
Inventories [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax assets | 1,054,611 | 405,489 |
Deferred tax benefit in net profit for the year | 669,382 | 253,932 | 852,888
Licenses and rights of use [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax assets | (2,621,672) | (2,630,583) |
Deferred tax benefit in net profit for the year | 141,060 | 229,244 | 480,502
Employee benefits [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax assets | 34,663,794 | 36,662,123 |
Deferred tax benefit in net profit for the year | (3,224,333) | (6,148,504) | (354,802)
Other [member] |  |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |  |
Net deferred tax assets | 16,993,113 | 22,537,353 |
Deferred tax benefit in net profit for the year | $ (9,576,577) | $ 3,150,479 | $ (3,545,542)

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