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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
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)