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Taxes - Net Deferred Income Tax Asset Rollforward (Details) - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of income taxes [Line Items]      
Balance at the beginning of the period $ 20,227 $ 20,067 $ 14,691
Deferred tax provision for the period 2,055 (5,960) (1,115)
Deferred tax income net recorded in share of the profit of equity method accounted investees 0 2 (694)
Acquisition of subsidiaries 0 1,871 0
Unrealized (gain) on cash flow hedges 801 (594) (1,281)
Exchange differences on translation of foreign operations 18 1,002 (2,604)
Remeasurements of the net defined benefit liability (399) 405 497
Retained earnings of equity method accounted investees 0 954 (334)
Restatement effect of the period and beginning balances associated with hyperinflationary economies (803) 121 155
Balance at the end of the period 18,219 20,227 20,067
Discontinued operations      
Disclosure of income taxes [Line Items]      
Related discontinued operations $ 336 $ 2,039 $ 0