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CURRENT AND DEFERRED INCOME TAXES - Income tax rates applicable in each jurisdiction where the Company operates (Details)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income tax rates          
Applicable rate 27.00% 25.50% 24.00% 22.50% 21.00%
Chile          
Income tax rates          
Applicable rate   25.50% 24.00% 22.50%  
Brazil          
Income tax rates          
Applicable rate   34.00% 34.00% 34.00%  
Argentina          
Income tax rates          
Applicable rate   35.00% 35.00% 35.00%  
Paraguay          
Income tax rates          
Applicable rate   10.00% 10.00% 10.00%