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Taxes - Tax Loss Carryforwards Rollforward (Details) - MXN ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Taxes [Abstract]      
Tax loss carryforwards, beginning $ 42,813,000,000 $ 31,323,000,000  
Derecognized (8,874,000,000) (932,000,000)  
Increase 6,115,000,000 21,018,000,000  
Usage of tax losses (10,747,000,000) (7,281,000,000)  
Translation effect of beginning balances 1,985,000,000 (1,315,000,000)  
Tax loss carryforwards, ending 31,292,000,000 42,813,000,000 $ 31,323,000,000
Taxes withheld on payment of dividends 0 0 0
Temporary differences for which tax liability not recognized 31,261,000,000 19,307,000,000 48,427,000,000
Increase (decrease) through loss of control of subsidiary, deferred tax liability (asset) $ 1,472,000,000 $ 0 $ 0