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Income Taxes, Composition of Income Tax Expense (Details)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2024
MXN ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
MXN ($)
Dec. 31, 2022
MXN ($)
Income Tax Attributable to a Continuing Operation [Abstract]        
Deferred income tax $ (12,920,451)   $ (13,810,280)  
Total income tax 35,238,443 $ 1,738 34,544,003 $ 46,044,089
Mexico [Member]        
Income Tax Attributable to a Continuing Operation [Abstract]        
Current year income tax 29,105,637   32,327,958 29,865,043
Deferred income tax (12,286,894)   (6,706,412) 3,454,279
Foreign [Member]        
Income Tax Attributable to a Continuing Operation [Abstract]        
Current year income tax 19,053,257   16,026,324 17,634,494
Deferred income tax (633,557)   (7,103,867) (4,909,727)
Income Tax Attributable to a Discontinued Operation [Abstract]        
Income tax attributable to a discontinued operation [1] $ 0   $ 0 $ 1,805,500
[1] Includes effects related to the sale of Panama and the Claro Chile, SpA joint venture. See Note 2Ac