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OTHER NON-FINANCIAL LIABILITIES (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure Of Non Financial Other Liabilities Explanatory [Abstract]  
Schedule of composition of non financial liabilities
   Current liabilities   Non-current liabilities   Total Liabilities 
   As of   As of   As of   As of   As of   As of 
   December 31,   December 31,   December 31,   December 31,   December 31,   December 31, 
   2020   2019   2020   2019   2020   2019 
   ThUS$   ThUS$   ThUS$   ThUS$   ThUS$   ThUS$ 
Deferred revenues (1)(2)   2,036,880    2,689,083    702,008    851,383    2,738,888    3,540,466 
Sales tax   7,609    2,556    -    -    7,609    2,556 
Retentions   27,853    43,916    -    -    27,853    43,916 
Others taxes   3,931    7,555    -    -    3,931    7,555 
Dividends payable   -    57,129    -    -    -    57,129 
Other sundry liabilities   12,518    34,982    -    -    12,518    34,982 
Total other non-financial liabilities   2,088,791    2,835,221    702,008    851,383    2,790,799    3,686,604 
Schedule of composition of non financial liabilities
       Deferred income                 
   Initial balance   (1) Recognition   Use   Loyalty (accreditation and exchange)   Expiration of tickets   Adjustment application IAS 29, Argentina hyperinflation   Others Provisions   Final balance 
   ThUS$   ThUS$   ThUS$   ThUS$   ThUS$   ThUS$   ThUS$   ThUS$ 
                                 
From January 1 to December 31, 2019   2,974,760    8,264,970    (7,703,011)   124,548    (156,435)   2,232    33,402    3,540,466 
From January 1 to December 31, 2020   3,540,466    1,970,203    (2,554,476)   (137,176)   (72,670)   (3,485)   (3,974)   2,738,888