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ISSUED DEBT INSTRUMENTS AND OTHER FINANCIAL LIABILITIES (Details 6) - CLP ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial liabilities [line items]    
Issued debt instruments $ 8,115,233 $ 7,093,653
Senior Bonds [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 7,198,865 6,186,760
Senior Bonds [Member] | Due Within 1 Year [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 844,898 337,166
Senior Bonds [Member] | Due After 1 Year But Within 2 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 1,331,255 866,936
Senior Bonds [Member] | Due After 2 Years But Within 3 years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 1,073,847 832,978
Senior Bonds [Member] | Due After 3 Years But Within 4 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 1,104,547 1,177,081
Senior Bonds [Member] | Due After 4 Years But Within 5 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 421,918 902,647
Senior Bonds [Member] | Due After 5 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments $ 2,422,400 $ 2,069,952