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Financial Instruments - Summarizes outstanding Cross Currency Swap Agreements (Detail) - MXN ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items]    
Asset $ 96 $ 591
Cross-currency swaps | Less than one year | Cash flow hedges    
Disclosure of detailed information about financial instruments [line items]    
Notional Amount 5,210 11,381
Derivative financial instruments liability (984) 0
Asset 96 $ 2,278
Cross-currency swaps | One to three years | Cash flow hedges    
Disclosure of detailed information about financial instruments [line items]    
Notional Amount 7,602  
Derivative financial instruments liability (1,377)  
Asset  
Cross-currency swaps | Three to four years | Cash flow hedges    
Disclosure of detailed information about financial instruments [line items]    
Notional Amount 13,633  
Derivative financial instruments liability (803)  
Asset  
Cross-currency swaps | Four to six years | Cash flow hedges    
Disclosure of detailed information about financial instruments [line items]    
Notional Amount 507  
Derivative financial instruments liability (51)  
Asset