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RISK MANAGEMENT (Details 21) - Market Risk [Member]
$ in Thousands, $ in Millions
Dec. 31, 2018
CLP ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
CLP ($)
Dec. 31, 2017
USD ($)
Local Currency Investments [Member] | Loss Limit [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income $ 48,000   $ 48,000  
Effect on capital 192,001   175,000  
Local Currency Investments [Member] | Top of Range [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income 43,742   (37,148)  
Effect on capital 189,725   (141,287)  
Local Currency Investments [Member] | Bottom of Range [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income 27,854   (22,958)  
Effect on capital 170,450   (112,818)  
Local Currency Investments [Member] | Weighted Average [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income 37,569   (29,110)  
Effect on capital 180,972   (128,506)  
Foreign Currency Investments [Member] | Loss Limit [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income   $ 30,000   $ 30,000
Effect on capital   75,000   75,000
Foreign Currency Investments [Member] | Top of Range [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income   12,000   16,000
Effect on capital   38,000   42,000
Foreign Currency Investments [Member] | Bottom of Range [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income   4,000   4,000
Effect on capital   (10,000)   15,000
Foreign Currency Investments [Member] | Weighted Average [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income   9,000   10,000
Effect on capital   $ 22,000   $ 23,000
Consolidated [Member] | Loss Limit [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income 48,000   48,000  
Effect on capital 192,002   175,000  
Consolidated [Member] | Top of Range [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income 45,492   (38,249)  
Effect on capital 192,848   (142,442)  
Consolidated [Member] | Bottom of Range [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income 29,167   (23,571)  
Effect on capital 168,766   (112,277)  
Consolidated [Member] | Weighted Average [Member]        
Disclosure of detailed information about financial instruments [line items]        
Effect on financial income 38,908   (29,948)  
Effect on capital $ 182,557   $ (128,360)