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Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Schedule of Estimate Impairment Evaluations (Detail)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Brazil [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 35.28% 31.65%
Average margin on CAPEX 22.13% 18.21%
Average pre-tax discount rate (WACC) 11.71% 9.70%
Puerto Rico [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 23.31% 28.91%
Average margin on CAPEX 8.31% 9.08%
Average pre-tax discount rate (WACC) 4.42% 11.29%
Dominican Republic [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 45.79% 45.83%
Average margin on CAPEX 15.55% 10.55%
Average pre-tax discount rate (WACC) 19.23% 19.70%
Mexico [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 35.48% 33.38%
Average margin on CAPEX 8.72% 10.75%
Average pre-tax discount rate (WACC) 16.13% 14.34%
Ecuador [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 37.83% 35.80%
Average margin on CAPEX 10.07% 7.92%
Average pre-tax discount rate (WACC) 23.57% 22.84%
Peru [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 29.64% 28.92%
Average margin on CAPEX 16.75% 14.18%
Average pre-tax discount rate (WACC) 13.61% 14.20%
El Salvador [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 40.36% 39.43%
Average margin on CAPEX 17.99% 23.69%
Average pre-tax discount rate (WACC) 25.14% 21.95%
Chile [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 22.04% 25.92%
Average margin on CAPEX 12.45% 8.61%
Average pre-tax discount rate (WACC) 6.15% 7.87%
Colombia [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 41.93% 38.34%
Average margin on CAPEX 19.88% 14.40%
Average pre-tax discount rate (WACC) 19.06% 13.93%
Bottom of range [member] | Europe [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 25.59% 23.61%
Average margin on CAPEX 7.34% 8.29%
Average pre-tax discount rate (WACC) 9.06% 8.74%
Bottom of range [member] | Other countries [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 9.16% 10.10%
Average margin on CAPEX 0.43% 0.50%
Average pre-tax discount rate (WACC) 7.89% 7.39%
Top of range [member] | Europe [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 52.46% 51.58%
Average margin on CAPEX 14.97% 20.72%
Average pre-tax discount rate (WACC) 19.04% 20.07%
Top of range [member] | Other countries [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 48.18% 48.92%
Average margin on CAPEX 23.43% 21.39%
Average pre-tax discount rate (WACC) 24.28% 23.79%