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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, 2020
Dec. 31, 2019
Brazil [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 40.67% 40.43%
Average margin on CAPEX 25.36% 23.50%
Average pre-tax discount rate (WACC) 9.50% 11.00%
Puerto Rico [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 23.06% 21.94%
Average margin on CAPEX 14.57% 17.94%
Average pre-tax discount rate (WACC) 3.53% 4.39%
Dominican Republic [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 47.57% 47.23%
Average margin on CAPEX 13.71% 16.17%
Average pre-tax discount rate (WACC) 8.27% 13.84%
Mexico [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 32.69% 38.81%
Average margin on CAPEX 11.01% 9.84%
Average pre-tax discount rate (WACC) 6.03% 6.94%
Ecuador [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 49.23% 44.98%
Average margin on CAPEX 11.14% 11.65%
Average pre-tax discount rate (WACC) 17.50% 19.85%
Peru [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 38.72% 32.51%
Average margin on CAPEX 15.43% 18.51%
Average pre-tax discount rate (WACC) 4.76% 8.86%
El Salvador [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 45.92% 44.04%
Average margin on CAPEX 21.19% 25.03%
Average pre-tax discount rate (WACC) 14.63% 16.05%
Chile [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 26.34% 26.85%
Average margin on CAPEX 13.18% 18.00%
Average pre-tax discount rate (WACC) 3.37% 4.16%
Colombia [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 43.45% 45.58%
Average margin on CAPEX 18.19% 19.25%
Average pre-tax discount rate (WACC) 6.44% 17.27%
Bottom of range [member] | Europe [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 32.20% 29.40%
Average margin on CAPEX 7.04% 10.90%
Average pre-tax discount rate (WACC) 3.88% 5.77%
Bottom of range [member] | Other countries [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 10.07% 7.40%
Average margin on CAPEX 0.48% 0.57%
Average pre-tax discount rate (WACC) 3.42% 6.41%
Top of range [member] | Europe [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 40.76% 44.50%
Average margin on CAPEX 19.39% 19.30%
Average pre-tax discount rate (WACC) 12.02% 14.96%
Top of range [member] | Other countries [member]    
Disclosure of impairment of assets [line items]    
Average margin on EBIDTA 47.23% 52.40%
Average margin on CAPEX 31.67% 31.00%
Average pre-tax discount rate (WACC) 21.85% 34.75%