v3.26.1
Business Combinations and Disposals - Purchase Allocation (Details) - MXN ($)
 12 Months Ended
Dec. 31, 2025
Sep. 30, 2024
Mar. 31, 2023
Disclosure of detailed information about business combination [line items]      
Goodwill arising on acquisition $ 0    
Delek      
Disclosure of detailed information about business combination [line items]      
Current assets   $ 191,000,000  
Inventories   762,000,000  
Total assets   6,494,000,000  
Other intangible assets   1,216,000,000  
Total liabilities   (910,000,000)  
Net assets acquired   5,584,000,000  
Goodwill arising on acquisition   2,099,000,000  
Business acquisition, consideration transferred   7,683,000,000  
Cash acquired   (166,000,000)  
Net cash paid   7,517,000,000  
Delek | Property, plant and equipment, net      
Disclosure of detailed information about business combination [line items]      
Total assets   3,770,000,000  
Increase (decrease) in amounts allocated to assets in acquisition 637,000,000    
Delek | Right-of-use assets      
Disclosure of detailed information about business combination [line items]      
Total assets   $ 555,000,000  
Delek | Accumulated depreciation      
Disclosure of detailed information about business combination [line items]      
Increase (decrease) in amounts allocated to assets in acquisition $ 37,000,000    
Net Pay S.A.P.I de C.V.      
Disclosure of detailed information about business combination [line items]      
Current assets     $ 271,000,000
Total assets     727,000,000
Other intangible assets     97,000,000
Total liabilities     (223,000,000)
Net assets acquired     504,000,000
Goodwill arising on acquisition     3,918,000,000
Business acquisition, consideration transferred     4,422,000,000
Earn out     (596,000,000)
Cash acquired     (39,000,000)
Net cash paid     3,787,000,000
Net Pay S.A.P.I de C.V. | Customer relationships      
Disclosure of detailed information about business combination [line items]      
Identifiable intangible assets     188,000,000
Net Pay S.A.P.I de C.V. | Trademark rights      
Disclosure of detailed information about business combination [line items]      
Identifiable intangible assets     26,000,000
Net Pay S.A.P.I de C.V. | Technology cost      
Disclosure of detailed information about business combination [line items]      
Identifiable intangible assets     $ 145,000,000