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Financial Instruments - Additional Information - Credit Agreement, Facilities Agreement and Financing Agreement (Detail) - USD ($)
$ in Millions
 12 Months Ended
Oct. 29, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2017
Jul. 19, 2017
Disclosure of detailed information about financial instruments [line items]            
Repayments of current borrowings   $ 5,897 $ 4,572 $ 3,284    
3-Month LIBOR rate   0.21% 0.24%      
3-Month EURIBOR rate   (0.57%) (0.545%)      
28-Day TIIE Rate   5.72%        
Total adjustment of the interest rate margin description   interest rate margin of plus or minus 5 basis points        
Two Thousand Twenty One Credit Agreement [Member]            
Disclosure of detailed information about financial instruments [line items]            
Repayments of current borrowings $ 3,250          
Line of credit ,Maximum Amount   $ 600        
Line of credit ,Interest basis Points   25 days        
Line of credit Leverage Ratio Description   2.25 times in the lower end to greater than 3.25 times        
Two Thousand Twenty One Credit Agreement [Member] | Five year amortizing term loan [Member]            
Disclosure of detailed information about financial instruments [line items]            
Line of credit ,Maximum Amount 1,500          
Line of credit ,Expiration period   5 years        
Two Thousand Twenty One Credit Agreement [Member] | Five year committed Revolving Credit Facility [Member]            
Disclosure of detailed information about financial instruments [line items]            
Line of credit ,Maximum Amount $ 1,750          
Line of credit ,Expiration period   5 years        
CEMEX Holdings Philippines, Inc. [member]            
Disclosure of detailed information about financial instruments [line items]            
Maximum capital expenditure   $ 500 $ 500      
CEMEX Latam Holdings, S.A [member]            
Disclosure of detailed information about financial instruments [line items]            
Maximum capital expenditure   1,500 1,500      
Acquisitions and investments in joint ventures   $ 400 $ 400      
2017 Credit Agreement [member]            
Disclosure of detailed information about financial instruments [line items]            
Bank indebtedness           $ 4,050
2014 Credit Agreement [member]            
Disclosure of detailed information about financial instruments [line items]            
Bank indebtedness         $ 3,680  
Bottom of range [member] | Two Thousand Twenty One Credit Agreement [Member]            
Disclosure of detailed information about financial instruments [line items]            
Line of credit ,Interest basis Points   100 days        
Bottom of range [member] | Credit agreement [member]            
Disclosure of detailed information about financial instruments [line items]            
Interest rate   1.65%        
Top of range [member] | Two Thousand Twenty One Credit Agreement [Member]            
Disclosure of detailed information about financial instruments [line items]            
Line of credit ,Interest basis Points   175 days        
Top of range [member] | Credit agreement [member]            
Disclosure of detailed information about financial instruments [line items]            
Interest rate   3.94%