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Financial Instruments - Summarizes outstanding Cross Currency Swap Agreements for Prior Year (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 two years | Cash flow hedges    
Disclosure of detailed information about financial instruments [line items]    
Notional Amount   5,971
Derivative financial instruments liability   (918)
Asset   364
Cross-currency swaps | Two to four years | Cash flow hedges    
Disclosure of detailed information about financial instruments [line items]    
Notional Amount   8,713
Derivative financial instruments liability   (418)
Asset   95
Cross-currency swaps | Four to five years | Cash flow hedges    
Disclosure of detailed information about financial instruments [line items]    
Notional Amount   3,679
Derivative financial instruments liability   (104)
Asset   $ 110