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Financial Instruments - Forward Agreements to Purchase Foreign Currency (Details) - MXN ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of Financial Assets and Financial Liabilities [Line Items]    
Face amount $ 67,216 $ 52,369
Year one    
Disclosure of Financial Assets and Financial Liabilities [Line Items]    
Face amount 0  
Year two    
Disclosure of Financial Assets and Financial Liabilities [Line Items]    
Face amount 6,251  
Year three    
Disclosure of Financial Assets and Financial Liabilities [Line Items]    
Face amount 4,358  
Year four    
Disclosure of Financial Assets and Financial Liabilities [Line Items]    
Face amount 6,819  
Forward contract | Year one    
Disclosure of Financial Assets and Financial Liabilities [Line Items]    
Face amount 8,052 11,449
Fair value Liability (138) (573)
Fair Value Asset $ 560 $ 36