v3.26.1
Financial Instruments - Market Risks (Details) - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | MXN/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate $ 0 $ 0 $ 0  
Effect on equity from decrease in exchange rate 0 0 0  
Effect on profit or loss from increase in exchange rate 1,443 2,424 1,796  
Effect on profit or loss from decrease in exchange rate (1,443) 2,424 1,796  
FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | BRL/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 0 0 0  
Effect on equity from decrease in exchange rate 0 0 0  
Effect on profit or loss from increase in exchange rate 227 163 34  
Effect on profit or loss from decrease in exchange rate 227 163 34  
FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | COP/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 0 0 0  
Effect on equity from decrease in exchange rate 0 0 0  
Effect on profit or loss from increase in exchange rate 506 434 425  
Effect on profit or loss from decrease in exchange rate 506 434 425  
FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | EUR/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 0      
Effect on equity from decrease in exchange rate 0      
Effect on profit or loss from increase in exchange rate 848      
Effect on profit or loss from decrease in exchange rate 848      
FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | PEN/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 0 0    
Effect on equity from decrease in exchange rate 0 0    
Effect on profit or loss from increase in exchange rate 22 16    
Effect on profit or loss from decrease in exchange rate 22 16    
FEMSA Entity Excluding Coca-Cola FEMSA | Cross-currency swaps | CLP/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 0   0  
Effect on equity from decrease in exchange rate 0   0  
Effect on profit or loss from increase in exchange rate 602   678  
Effect on profit or loss from decrease in exchange rate 602   678  
FEMSA Entity Excluding Coca-Cola FEMSA | Net Cash In Foreign Currency | EUR/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on profit or loss from increase in exchange rate 4,880 14,855 14,617  
Effect on profit or loss from decrease in exchange rate 4,880 14,855 14,617  
Coca-Cola FEMSA | Cross-currency swaps | MXN/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 1,758 1,863 1,314  
Effect on equity from decrease in exchange rate (1,758) (1,863) (1,314)  
Effect on profit or loss from increase in exchange rate 0 0 0  
Effect on profit or loss from decrease in exchange rate 0 0 0  
Coca-Cola FEMSA | Cross-currency swaps | BRL/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 1,209 2,187 1,683  
Effect on equity from decrease in exchange rate (1,209) (2,187) (1,683)  
Effect on profit or loss from increase in exchange rate 0 0 0  
Effect on profit or loss from decrease in exchange rate 0 0 0  
Coca-Cola FEMSA | Cross-currency swaps | EUR/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate     0  
Effect on equity from decrease in exchange rate     0  
Effect on profit or loss from increase in exchange rate     742  
Effect on profit or loss from decrease in exchange rate     742  
Coca-Cola FEMSA | Cross-currency swaps | CLP/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate   0    
Effect on equity from decrease in exchange rate   0    
Effect on profit or loss from increase in exchange rate   709    
Effect on profit or loss from decrease in exchange rate   709    
Coca-Cola FEMSA | Net Cash In Foreign Currency | U.S. dollars        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on profit or loss from increase in exchange rate 0 1,397 1,797  
Effect on profit or loss from decrease in exchange rate 0 1,397 1,797  
Commodity price risk | Coca-Cola FEMSA | Commodity price contracts | Sugar Price Contracts        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from change in commodity price (809) (1,578) (765)  
Commodity price risk | Coca-Cola FEMSA | Commodity price contracts | Aluminum price contracts        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from change in commodity price (248) (189) (2,812)  
Currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Foreign exchange forward contracts | MXN/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 0 15 9  
Effect on equity from decrease in exchange rate 0 (15) (9)  
Currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Foreign exchange forward contracts | CHF/EUR        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 85 125 78  
Effect on equity from decrease in exchange rate (85) (125) (78)  
Currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Foreign exchange forward contracts | CHF/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate   7    
Effect on equity from decrease in exchange rate   (7)    
Currency risk | FEMSA Entity Excluding Coca-Cola FEMSA | Foreign exchange forward contracts | EUR/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate     (6)  
Effect on equity from decrease in exchange rate     6  
Currency risk | Coca-Cola FEMSA | Foreign exchange forward contracts | MXN/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 565 183 465  
Effect on equity from decrease in exchange rate (565) (183) (465)  
Currency risk | Coca-Cola FEMSA | Foreign exchange forward contracts | BRL/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 194 50 521  
Effect on equity from decrease in exchange rate (194) (50) (521)  
Currency risk | Coca-Cola FEMSA | Foreign exchange forward contracts | COP/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 91 34 225  
Effect on equity from decrease in exchange rate (91) (34) (225)  
Currency risk | Coca-Cola FEMSA | Foreign exchange forward contracts | ARS/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 40 11 685  
Effect on equity from decrease in exchange rate (40) (11) (685)  
Currency risk | Coca-Cola FEMSA | Foreign exchange forward contracts | UYU/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 25 13 20  
Effect on equity from decrease in exchange rate (25) (13) (20)  
Currency risk | Coca-Cola FEMSA | Foreign exchange forward contracts | CRC/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity from increase in exchange rate 10 14 15  
Effect on equity from decrease in exchange rate (10) (14) (15)  
Currency risk | Coca-Cola FEMSA | Options To Purchase Foreign Currency | MXN/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity to purchase foreign currency (168) (136) 0  
Currency risk | Coca-Cola FEMSA | Options To Purchase Foreign Currency | BRL/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity to purchase foreign currency $ 0 (119) 0  
Currency risk | Coca-Cola FEMSA | Options To Purchase Foreign Currency | COP/USD        
Disclosure of nature and extent of risks arising from financial instruments [line items]        
Effect on equity to purchase foreign currency   $ (7) $ (54) $ 0