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Financial Instruments - Summary of Long Term Notes Payable (Parenthetical) (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
Feb. 16, 2024
MXN ($)
Disclosure of detailed information about financial instruments [line items]    
Debt instrument repurchased notes notional amount $ 1,172  
Gain loss on notes repurchases $ 104  
sustainability-linked long-term notes [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount   $ 5,500
2023 CEBURES tranches one [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount   $ 2,000
2023 CEBURES tranches one [member] | Floating interest rate [member]    
Disclosure of detailed information about financial instruments [line items]    
Borrowings, adjustment to interest rate basis   0.45%
2023 CEBURES tranches two [member]    
Disclosure of detailed information about financial instruments [line items]    
Notional amount   $ 3,500
2023 CEBURES tranches two [member] | Fixed interest rate [member]    
Disclosure of detailed information about financial instruments [line items]    
Borrowings, interest rate   11.48%