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Goodwill and Intangible Assets, Net - Additional Information (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2018
MXN ($)
Dec. 31, 2017
MXN ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
MXN ($)
Disclosure of detailed information about intangible assets [line items]        
Amortization of intangible assets of definite useful life recognized within operating costs and expenses $ 2,051 $ 2,037   $ 1,950
Amount of net book value in excess of net present value of projected cash flows   $ 1,920 $ 98  
Funding cost percentage 7.30% 6.10% 6.10% 6.20%
Risk free rate 2.90% 2.80% 2.80% 2.70%
Increase in pre-tax discount rate 1.00%      
Decrease in long-term growth rate (1.00%)      
Weighted average Operating EBITDA multiple 11.1 9.0 9.0 9.0
Lowest multiple 6.7 6.5 6.5 5.9
Highest multiple 14.9 18.9 18.9 18.3
Top of range [member]        
Disclosure of detailed information about intangible assets [line items]        
Decrease in discount rates with goodwill 0.010      
Bottom of range [member]        
Disclosure of detailed information about intangible assets [line items]        
Decrease in discount rates with goodwill 0.003      
United States [member]        
Disclosure of detailed information about intangible assets [line items]        
Percentage of goodwill allocated 78.00% 78.00% 78.00%  
Percentage of increases in ready-mix concrete volumes       1.00%
Percentage of increases in ready-mix concrete prices 2.00% 1.00% 1.00% 1.00%
Percentage of decreases in ready-mix concrete volumes   1.00% 1.00%