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Goodwill and Intangible Assets, Net - Summary of Goodwill Balances Allocated by Operating Segment (Detail) - MXN ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill $ 195,474 $ 206,319 $ 184,156 $ 160,544
Mexico [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 7,371 7,529    
United States [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 152,486 162,692    
Spain [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 10,000 12,316    
United Kingdom [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 6,335 6,371    
France [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 4,796 4,524    
Czech Republic [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 709 583    
Colombia [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 6,146 6,461    
Dominican Republic [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 279 250    
Trinidad Cement Limited [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 2,027 0    
Caribbean Argentina Costa Rica And Panama [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 985 1,036    
Philippines [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 1,817 1,911    
United Arab Emirates [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 1,769 1,865    
Egypt [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill 232 231    
Other countries [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill $ 522 $ 550