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FINANCIAL RISK MANAGEMENT - Prepayments, Guarantees and Financial Investments (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
CLP ($)
item
Dec. 31, 2017
USD ($)
Dec. 31, 2016
CLP ($)
Dec. 31, 2015
CLP ($)
Credit risk        
Trade receivables covered by insurance percentage 87.00%      
Other provisions $ 65,624,166   $ 73,081,893 $ 64,301,817
Maximum        
Credit risk        
Trade receivables uncollectible percentage 0.50%      
Credit risk        
Credit risk        
Prepayment to suppliers threshold   $ 25,000    
Credit risk | Domestic        
Credit risk        
Trade receivables $ 66,872,384      
Credit risk | Domestic | Provision for credit commitments        
Credit risk        
Other provisions $ 973,696      
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