v3.25.1
STOCKHOLDERS' EQUITY: - Treasury Stock (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Activity in treasury stock    
Balance at beginning of period $ 9,238.1 $ 7,481.2
Balance at end of period 9,636.7 7,605.9
Treasury Stock    
Activity in treasury stock    
Balance at end of period (2,554.1) (3,157.2)
Treasury Stock | Parent Company (Grupo Mexico) common shares    
Activity in treasury stock    
Balance at beginning of period (2,337.3) (2,766.7)
Dividends paid in common stock (143.2)  
Used for corporate purposes (0.1) (0.1)
Balance at end of period (2,194.1) (2,766.6)
Treasury Stock | Parent Company (Grupo Mexico)    
Activity in treasury stock    
Balance at beginning of period (363.4) (382.3)
Other activity, including dividend, interest and foreign currency translation effect (3.3) 8.3
Balance at end of period $ (360.1) $ (390.6)