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PROPERTY, PLANT, AND EQUIPMENT (Details 3) - CLP ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Total $ 173,602 $ 145,465
Due Within 1 Year [Member]    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Total 25,702 26,059
Due After 1 Year But Within 2 Years [Member]    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Total 24,692 21,343
Due After 2 Years But Within 3 years [Member]    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Total 22,439 18,091
Due After 3 Years But Within 4 Years [Member]    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Total 19,574 15,736
Due After 4 Years But Within 5 Years [Member]    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Total 17,250 12,734
Due After 5 Years [Member]    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Total $ 63,945 $ 51,502