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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, 2018
Dec. 31, 2017
Brazil [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 36.43% 35.28%
Average margin on CAPEX 21.88% 22.13%
Average pre-tax discount rate (WACC) 10.38% 11.71%
Puerto Rico [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 23.86% 23.31%
Average margin on CAPEX 9.89% 8.31%
Average pre-tax discount rate (WACC) 4.81% 4.42%
Dominican Republic [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 48.64% 45.79%
Average margin on CAPEX 18.43% 15.55%
Average pre-tax discount rate (WACC) 17.66% 19.23%
Mexico [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 36.33% 35.48%
Average margin on CAPEX 7.93% 8.72%
Average pre-tax discount rate (WACC) 16.30% 16.13%
Ecuador [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 39.83% 37.83%
Average margin on CAPEX 11.26% 10.07%
Average pre-tax discount rate (WACC) 24.45% 23.57%
Peru [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 30.29% 29.64%
Average margin on CAPEX 19.95% 16.75%
Average pre-tax discount rate (WACC) 11.52% 13.61%
El Salvador [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 45.36% 40.36%
Average margin on CAPEX 22.61% 17.99%
Average pre-tax discount rate (WACC) 18.01% 25.14%
Chile [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 25.91% 22.04%
Average margin on CAPEX 14.99% 12.45%
Average pre-tax discount rate (WACC) 6.62% 6.15%
Colombia [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 45.01% 41.93%
Average margin on CAPEX 17.14% 19.88%
Average pre-tax discount rate (WACC) 20.29% 19.06%
Bottom of range [member] | Europe [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 22.13% 25.59%
Average margin on CAPEX 8.13% 7.34%
Average pre-tax discount rate (WACC) 8.36% 9.06%
Bottom of range [member] | Other countries [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 7.90% 9.16%
Average margin on CAPEX 0.61% 0.43%
Average pre-tax discount rate (WACC) 9.97% 7.89%
Top of range [member] | Europe [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 41.51% 52.46%
Average margin on CAPEX 19.40% 14.97%
Average pre-tax discount rate (WACC) 22.08% 19.04%
Top of range [member] | Other countries [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 45.91% 48.18%
Average margin on CAPEX 23.96% 23.43%
Average pre-tax discount rate (WACC) 31.63% 24.28%