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Pensions and Post-Employment Benefits - Additional Information (Detail)
£ in Millions, $ in Millions
 1 Months Ended 12 Months Ended
Feb. 28, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2021
GBP (£)
Dec. 31, 2020
USD ($)
Dec. 31, 2020
GBP (£)
Dec. 31, 2019
USD ($)
Dec. 31, 2019
GBP (£)
Disclosure of defined benefit plans [line items]              
Costs of defined contribution plans   $ 47   $ 48   $ 50  
Projected benefits obligation   2,783   3,033   2,738  
increase in the net projected liability   10   10   10  
Curtailment gain loss on settlement   $ 1   1   3  
Period of settlement of one time settlement obligation   20 years 20 years        
Decrease in the net projected liability   $ 196   (180)   (216)  
Decrease in the net projected liability   (20)   (18)   11  
Top of range [member]              
Disclosure of defined benefit plans [line items]              
Decrease in the net projected liability   122          
Decrease in the net projected liability   20          
Post employment healthcare benefits [member]              
Disclosure of defined benefit plans [line items]              
Projected benefits obligation   $ 69   $ 78      
Other Postretirement Benefits [Member]              
Disclosure of defined benefit plans [line items]              
Curtailment gain loss on settlement $ 1            
Trinidad Cement Limited [member]              
Disclosure of defined benefit plans [line items]              
Medical inflation rates used to determine the projected benefits obligation   5.00%   10.50%      
Mexico [member]              
Disclosure of defined benefit plans [line items]              
Projected benefits obligation   $ 200   $ 216      
Medical inflation rates used to determine the projected benefits obligation   7.00%   8.00%      
Income from prior period adjustment of retirement benefit       $ 1      
Puerto Rico [member]              
Disclosure of defined benefit plans [line items]              
Medical inflation rates used to determine the projected benefits obligation   3.80%   6.40%      
United Kingdom [member]              
Disclosure of defined benefit plans [line items]              
Projected benefits obligation   $ 1,794   $ 1,925      
Medical inflation rates used to determine the projected benefits obligation   6.90%   6.90%      
increase in the net projected liability   $ 81          
Decrease in the net projected liability   86          
Decrease in the net projected liability   12          
United States [member]              
Disclosure of defined benefit plans [line items]              
Projected benefits obligation   270   $ 305      
increase in the net projected liability   81          
Decrease in the net projected liability   13          
United States [member] | Transition to defined contribution plan [member]              
Disclosure of defined benefit plans [line items]              
One time settlement obligation incurred due to transition of contribution plans   24          
United States And United Kingdom [member] | Multi-employer defined benefit plans [member]              
Disclosure of defined benefit plans [line items]              
Contribution to the multiemployer plans combined amounts   58   56   64  
Estimate of contribution to be made to the plan in the subsequent annual period   59          
France [member]              
Disclosure of defined benefit plans [line items]              
Income from prior period adjustment of retirement benefit       2      
Other Countries [member]              
Disclosure of defined benefit plans [line items]              
Projected benefits obligation   339   368      
Decrease in the net projected liability   23          
Germany [member]              
Disclosure of defined benefit plans [line items]              
Projected benefits obligation   180   219      
increase in the net projected liability   81          
CEMEX U.K. [member]              
Disclosure of defined benefit plans [line items]              
Operating assets   553          
Dividends received   $ 30 £ 22.3 29 £ 21.3 $ 27 £ 20.3
Percentage of annual rate   5.00% 5.00%        
increase in the net projected liability       $ 54