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Financial Instruments - Summary of Long Term Notes Payable (Parenthetical) (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Oct. 05, 2023
USD ($)
Dec. 31, 2022
USD ($)
Oct. 05, 2023
MXN ($)
Disclosure of detailed information about financial instruments [line items]      
Debt instrument repurchased notes notional amount   $ 1,172  
Gain loss on notes repurchases $ 38 $ 104  
Cemex, S.A.B. de C.V. 2023 CEBURES [Member]      
Disclosure of detailed information about financial instruments [line items]      
Principal amount     $ 6,000
Cemex S A B de C V 2023 CEBURES fixed rate [Member]      
Disclosure of detailed information about financial instruments [line items]      
Principal amount     $ 5,000
Debt Instrument Term 7 years    
Borrowings, interest rate     11.48%
Cemex, S.A.B. de C.V. 2023 CEBURES variable rate [Member]      
Disclosure of detailed information about financial instruments [line items]      
Principal amount     $ 1,000
Debt Instrument Term 3 years    
Borrowings, adjustment to interest rate basis     0.45%