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Significant Accounting Policies - Disclosure of Recognition of Effects of Inflation in Countries with Hyperinflationary Economic Environments (Detail)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
2016- 2018 [member] | Mexico [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 15.70%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Guatemala [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 12.20%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Costa Rica [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 5.70%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Panama [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 2.10%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Colombia [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 13.40%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Nicaragua [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 13.10%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Argentina [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 158.40%    
Type of Economy Hyperinflationary    
2016- 2018 [member] | Venezuela [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Type of Economy Hyperinflationary    
2016- 2018 [member] | Brazil [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 25.00%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Philippines [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 11.90%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Euro Zone [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 2.70%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Chile [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 9.70%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Peru [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 9.30%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Ecuador [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 30.30%    
Type of Economy Non-hyperinflationary    
2016- 2018 [member] | Uruguay [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation 25.30%    
Type of Economy Non-hyperinflationary    
2015 - 2017 [member] | Mexico [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   12.70%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Guatemala [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   13.50%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Costa Rica [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   2.50%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Panama [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   2.30%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Colombia [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   17.50%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Nicaragua [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   12.30%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Argentina [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   101.50%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Venezuela [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   30690.00%  
Type of Economy   Hyperinflationary  
2015 - 2017 [member] | Brazil [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   21.10%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Philippines [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   7.50%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Euro Zone [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   2.70%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Chile [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   9.70%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Peru [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   9.30%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Ecuador [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation   30.30%  
Type of Economy   Non-hyperinflationary  
2015 - 2017 [member] | Uruguay [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Type of Economy   Non-hyperinflationary  
2014-2016 [member] | Mexico [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     9.90%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Guatemala [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     10.60%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Costa Rica [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     5.10%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Panama [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     2.80%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Colombia [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     17.00%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Nicaragua [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     13.10%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Argentina [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     99.70%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Venezuela [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     2263.00%
Type of Economy     Hyperinflationary
2014-2016 [member] | Brazil [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     25.20%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Philippines [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     5.70%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Euro Zone [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     1.20%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Chile [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     12.20%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Peru [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     11.20%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Ecuador [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Cumulative Inflation     8.40%
Type of Economy     Non-hyperinflationary
2014-2016 [member] | Uruguay [member]      
Disclosure of Hyperinflationary Reporting [line items]      
Type of Economy     Non-hyperinflationary