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Other Liabilities, Provisions, Contingencies and Commitments - Litigation, etc. (Details) - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of financial liabilities [line items]      
Aggregate amount claimed against company $ 108,481    
Capital Commitments 726 $ 432 $ 556
Brazil      
Disclosure of financial liabilities [line items]      
Tax contingencies amount 55,288    
Litigation amount 10,721 $ 7,342 $ 10,471
Coca-Cola FEMSA      
Disclosure of financial liabilities [line items]      
Amount extraordinary benefit from revision of suspended tax credit 1,083    
Coca-Cola FEMSA | ICMS      
Disclosure of financial liabilities [line items]      
Tax contingencies amount 8,573    
Coca-Cola FEMSA | Tax credits      
Disclosure of financial liabilities [line items]      
Tax contingencies amount 30,821    
Coca-Cola FEMSA | Federal taxes      
Disclosure of financial liabilities [line items]      
Tax contingencies amount 4,766    
Coca-Cola FEMSA | Amortization of Goodwill      
Disclosure of financial liabilities [line items]      
Tax contingencies amount 8,549    
Coca-Cola FEMSA | Liability Over The Operations of Third Party      
Disclosure of financial liabilities [line items]      
Tax contingencies amount $ 2,579