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Significant Accounting Policies - Effects of Inflation (Detail)
 12 Months Ended 36 Months Ended
Dec. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, threshold for recognition 100.00%      
Mexico [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   11.20% 13.20% 15.70%
Guatemala [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   10.90% 11.80% 12.20%
Costa Rica [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   4.50% 5.80% 5.70%
Panama [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   (1.50%) 0.50% 2.10%
Colombia [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   8.80% 11.00% 13.40%
Nicaragua [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   13.50% 15.60% 13.10%
Argentina [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   209.20% 179.40% 158.40%
Brazil [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   13.10% 11.10% 25.00%
Philippines [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period       11.90%
United States [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   3.70%    
Euro Zone [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   2.40% 3.60% 2.70%
Chile [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   8.80% 8.30% 9.70%
Peru [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   6.20% 5.20% 9.30%
Ecuador [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   (0.70%) 0.30% 30.30%
Uruguay [member]        
Disclosure of Hyperinflationary Reporting [line items]        
Cumulative inflation percentage, actual, during the period   28.50% 22.00% 25.30%