v3.26.1
Financial Instruments - Hedging Reserve Rollforward (Details) - MXN ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about hedged items [line items]      
The amounts included in non-financial costs: $ (1,035) $ 801 $ (355)
Reserve of cash flow hedges      
Disclosure of detailed information about hedged items [line items]      
Balances at beginning of the period 3,121    
Balances at the end of the period (56) $ 3,121  
Reserve of cash flow hedges | Foreign exchange currency risk | Purchase of stock      
Disclosure of detailed information about hedged items [line items]      
Valuation of the effective portion of derivative financial instruments (689)    
The amounts included in non-financial costs: 0    
Reserve of cash flow hedges | Foreign exchange currency risk | Other stock      
Disclosure of detailed information about hedged items [line items]      
Valuation of the effective portion of derivative financial instruments (9,164)    
Amounts reclassified to profit an loss 5,631    
Reserve of cash flow hedges | Interest rate risk      
Disclosure of detailed information about hedged items [line items]      
Valuation of the effective portion of derivative financial instruments (30)    
Amounts reclassified to profit an loss 0    
The amounts included in non-financial costs: 1,062    
Reserve of cash flow hedges | Commodity price risk | Purchase of stock      
Disclosure of detailed information about hedged items [line items]      
Valuation of the effective portion of derivative financial instruments 0    
The amounts included in non-financial costs: $ 13