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ISSUED DEBT INSTRUMENTS AND OTHER FINANCIAL LIABILITIES (Details 8) - CLP ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial liabilities [line items]    
Issued debt instruments $ 8,115,233 $ 7,093,653
Mortgage Bonds [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 94,921 99,222
Mortgage Bonds [Member] | Due Within 1 Year [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 4,833 4,541
Mortgage Bonds [Member] | Due After 1 Year But Within 2 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 7,758 7,291
Mortgage Bonds [Member] | Due After 2 Years But Within 3 years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 8,008 7,526
Mortgage Bonds [Member] | Due After 3 Years But Within 4 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 8,267 7,769
Mortgage Bonds [Member] | Due After 4 Years But Within 5 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 8,534 8,019
Mortgage Bonds [Member] | Due After 5 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments $ 57,521 $ 64,076