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ISSUED DEBT INSTRUMENTS AND OTHER FINANCIAL LIABILITIES (Details 2) - 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 Finance Bonds [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 25,490 34,479
Mortgage Finance Bonds [Member] | Due Within 1 Year [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 6,830 8,691
Mortgage Finance Bonds [Member] | Due After 1 Year But Within 2 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 5,946 6,744
Mortgage Finance Bonds [Member] | Due After 2 Years But Within 3 years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 5,034 6,096
Mortgage Finance Bonds [Member] | Due After 3 Years But Within 4 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 3,997 5,155
Mortgage Finance Bonds [Member] | Due After 4 Years But Within 5 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments 2,480 4,101
Mortgage Finance Bonds [Member] | Due After 5 Years [Member]    
Disclosure of financial liabilities [line items]    
Issued debt instruments $ 1,203 $ 3,692