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Financial Instruments - Net Effects of Expired Contracts That Met Hedging Criteria (Details) - Derivative Contract Met Hedging Criteria - MXN ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Currency swap contract | Interest expense      
Disclosure of detailed information about hedges [line items]      
Net effects of expired contracts $ 0 $ (392) $ (1)
Currency swap contract | Foreign exchange      
Disclosure of detailed information about hedges [line items]      
Net effects of expired contracts 0 (747) (5)
Interest rate swaps | Interest expense      
Disclosure of detailed information about hedges [line items]      
Net effects of expired contracts 0 0 0
Forward contract | Foreign exchange      
Disclosure of detailed information about hedges [line items]      
Net effects of expired contracts (3) 180 565
Forward contract | Cost of goods sold      
Disclosure of detailed information about hedges [line items]      
Net effects of expired contracts 136 (1,834) (681)
Commodity price contracts | Cost of goods sold      
Disclosure of detailed information about hedges [line items]      
Net effects of expired contracts (15) 430 614
Options to purchase foreign currency | Cost of goods sold      
Disclosure of detailed information about hedges [line items]      
Net effects of expired contracts $ 39 $ 0 $ 0