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Contingencies - Additional Information (Detail)
€ in Millions, $ in Millions, $ in Millions
 1 Months Ended 12 Months Ended
Nov. 19, 2018
Individuals
Entity
Dec. 11, 2017
MXN ($)
Dec. 11, 2017
USD ($)
Sep. 30, 2018
Jun. 30, 2012
MXN ($)
Jun. 30, 2012
USD ($)
Jun. 30, 2010
USD ($)
Dec. 31, 2018
MXN ($)
T
Dec. 31, 2018
USD ($)
T
Dec. 31, 2012
MXN ($)
Employees
Dec. 31, 2012
USD ($)
Employees
Dec. 31, 2011
Employees
Dec. 31, 2018
USD ($)
Dec. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
MXN ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2016
EUR (€)
Disclosure of Commitments and Contingencies [Line Items]                                    
Fine payable by S.L.U.                               $ 138 $ 7.0 € 6
Development levy on clay               $ 354         $ 18.0          
Number of former employees | Employees                   25 25 25            
Amount of damages and interest identified                   $ 1,513 $ 77.0              
Damages sought value         $ 1,454 $ 74.0                        
Euro [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Official closing exchange rates               22.5169         22.5169 23.5866 21.7945      
Pounds [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Official closing exchange rates               25.0557         25.0557 26.5361 25.5361      
Colombian Peso [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Official closing exchange rates               0.0060         0.0060 0.0066 0.0069      
United Kingdom [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Accrued environmental remediation liabilities               $ 3,282         $ 167.0          
United States [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Accrued environmental remediation liabilities               $ 648         $ 33.0          
Parent [member] | Polish Zloty [Member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Official closing exchange rates               3.75         3.75          
Parent [member] | Euro [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Official closing exchange rates               0.87         0.87          
Parent [member] | Pounds [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Official closing exchange rates               0.78         0.78          
Parent [member] | Colombian Peso [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Official closing exchange rates               3,250         3,250          
Parent [member] | Israelite Shekel [Member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Official closing exchange rates               3.75         3.75          
Superintendencia de Industria y Comercio [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Fine imposed   $ 491 $ 25.0                              
CEMEX Polska [Member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Fine imposed               $ 609 $ 31.0                  
Reduction of Fine Imposed               354 18.0                  
APO Land & Quarry Corporation [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Mibority interest percentage       40.00%                            
Number of individuals filed lawsuit 40                                  
Number of entities | Entity 1                                  
Number of individuals affected by landslide 8,000                                  
Loss contingency               1,611 82.0                  
APO Land & Quarry Corporation [member] | Rehabilitation fund [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Loss contingency               $ 197 $ 10.0                  
Environmental Authority [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Penality imposed | $             $ 0.4                      
Top of range [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Incrementing production up on environmental permit needs modifications | T               950,000 950,000                  
Top of range [member] | United Kingdom [member]                                    
Disclosure of Commitments and Contingencies [Line Items]                                    
Environmental expenditure assessment and quantification period from the date of closure, maximum               60 years 60 years