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FINANCIAL RISK MANAGEMENT - Prepayments, Guarantees and Financial Investments (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
item
Dec. 31, 2020
CLP ($)
Dec. 31, 2019
CLP ($)
Dec. 31, 2018
CLP ($)
Credit risk        
Trade receivables   $ 154,632,116 $ 153,654,549  
Other provisions   $ 50,070,273 $ 69,107,550 $ 62,452,526
Maximum        
Credit risk        
Trade receivables uncollectible percentage 0.50%      
Credit risk        
Credit risk        
Prepayment to suppliers threshold $ 25,000      
Credit risk | Minimum        
Credit risk        
Time deposits with institutions with risk ratings of A S&P or equivalent 1 year      
Credit risk | Maximum        
Credit risk        
Time deposits with institutions with risk ratings of Level 1 Fitch or equivalent 1 year      
Currency risk        
Credit risk        
Number of risks exposed to that are caused by exchange rate volatility | item 3