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FINANCIAL RISK MANAGEMENT - Interest Rate Risk (Details) - Interest rate risk - Fixed interest rate
$ in Millions, $ in Millions, in Millions
1 Months Ended 12 Months Ended
Oct. 31, 2019
CLP ($)
Dec. 31, 2019
CLF ( )
Dec. 31, 2019
CLP ($)
Dec. 31, 2019
USD ($)
National        
Interest Rate Risk        
Financial liabilities |   16,457    
Foreign        
Interest Rate Risk        
Financial liabilities       $ 365
Principal     $ 575  
Prepayment amount $ 210      
Percentage of foreign bonds re-denominated to domestic currencies   100.00%