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Financial Instruments - Debt (Details)
€ in Millions, $ in Millions
Dec. 31, 2023
MXN ($)
Feb. 28, 2023
EUR (€)
Dec. 31, 2022
MXN ($)
Dec. 31, 2021
MXN ($)
Dec. 31, 2020
MXN ($)
Disclosure of Financial Assets and Financial Liabilities [Line Items]          
Carrying value $ 232,897   $ 285,058 $ 252,940 $ 246,973
Face amount 52,369   79,088    
Senior Unsecured Exchangeable Bonds          
Disclosure of Financial Assets and Financial Liabilities [Line Items]          
Fair value 128        
Face amount | €   € 500      
Bank loans and notes payables          
Disclosure of Financial Assets and Financial Liabilities [Line Items]          
Carrying value 136,824   191,741    
Fair value $ 125,043   $ 163,312