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FINANCIAL RISK MANAGEMENT - Foreign Currency Risk (Details) - Currency risk
$ in Thousands
12 Months Ended
Dec. 31, 2018
CLP ($)
Net exposure of assets and liabilities in foreign currency  
Derivative financial liabilities $ 251,124,893
Financial liabilities net of assets and net of derivative contracts 2,466,157
Dollar  
Net exposure of assets and liabilities in foreign currency  
Gross financial assets subject to offsetting $ 5,917,041
Percentage of US denominated financial liabilities with derivative cross currency swaps 100.00%
Public and Bank liabilities  
Net exposure of assets and liabilities in foreign currency  
Gross financial liabilities subject to offsetting $ 257,041,934
Argentina | Public and Bank liabilities  
Net exposure of assets and liabilities in foreign currency  
Gross financial liabilities subject to offsetting $ 257,041,934