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Business Combinations, Discontinued Operations, Sale of Other Disposal Groups and Selected Financial Information by Reportable Segment and Line of Business - Additional Information (Detail)
$ in Millions
 1 Months Ended 2 Months Ended 6 Months Ended 7 Months Ended 12 Months Ended
Dec. 29, 2021
USD ($)
Mar. 31, 2021
USD ($)
Integer
Mar. 06, 2020
USD ($)
Jun. 28, 2019
USD ($)
Mar. 29, 2019
USD ($)
May 31, 2019
USD ($)
Mar. 06, 2020
USD ($)
Jul. 09, 2021
USD ($)
Aug. 03, 2020
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Jan. 31, 2021
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2018
USD ($)
Disclosure of operating segments [line items]                              
Ownership percentage         37.80%                    
Goodwill               $ 41   $ 7,984 [1] $ 8,506 [1] $ 9,562     $ 9,912
Sale of Assets Disposal Group         $ 387                    
Current liabilities                   5,380 5,352        
Loss on sale of discontinued operations               $ 67              
Sale Of Assets   $ 44                          
Concrete Plants [Member]                              
Disclosure of operating segments [line items]                              
Number Of Assets Held For Sale | Integer   24                          
Quarry [Member]                              
Disclosure of operating segments [line items]                              
Number Of Assets Held For Sale | Integer   1                          
White Cement Business [Member]                              
Disclosure of operating segments [line items]                              
Consideration, on sale of operations         155                    
CEMEX [Member]                              
Disclosure of operating segments [line items]                              
Goodwill       $ 8                      
Proceeds from divestiture       36                      
Gain (loss) on sale of business       $ 17 $ 66                    
Gunter Papenburg [Member]                              
Disclosure of operating segments [line items]                              
Proceeds from divestiture           $ 97                  
Gain (loss) on sale of business           $ 59                  
Discontinued operations [member]                              
Disclosure of operating segments [line items]                              
Gain (loss) on sale of business                   (4) (45) $ 55      
Breedon Group Plc [Member]                              
Disclosure of operating segments [line items]                              
Goodwill                     47        
Gain (loss) on sale of business                 $ 57 230          
Current liabilities                   30          
Kosoms [Member]                              
Disclosure of operating segments [line items]                              
Additional ownership percentage acquired     75.00%       75.00%                
Goodwill                     $ 291        
Proceeds from divestiture     $ 499                        
Gain (loss) on sale of business     $ 665       $ 14                
Israel [member] | Kinneret and Beton-He'Emek [Member] | Readymix Business Netei Noy [member]                              
Disclosure of operating segments [line items]                              
Consideration transferred                         $ 6    
Goodwill                   $ 5          
Israel [member] | Ashtrom Industries [Member] | Readymix Business Netei Noy [member]                              
Disclosure of operating segments [line items]                              
Consideration transferred                           $ 33  
Goodwill                           $ 2  
Costa Rica and El Salvador [Member]                              
Disclosure of operating segments [line items]                              
Consideration, on sale of operations $ 335                            
[1] This caption is primarily associated with Neoris N.V., CEMEX’s subsidiary involved in the sale of information technology and services.