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Issued Debt Instruments and Other Financial Liabilities (Details 2) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial liabilities [line items]      
Issued debt instruments $ 9,500,723 $ 8,115,233 $ 7,093,653
Mortgage Finance Bonds [Member]      
Disclosure of financial liabilities [line items]      
Issued debt instruments 18,502 25,490  
Mortgage Finance Bonds [Member] | Due Within 1 Year [Member]      
Disclosure of financial liabilities [line items]      
Issued debt instruments 6,013 6,830  
Mortgage Finance Bonds [Member] | Due After 1 Year But Within 2 Years [Member]      
Disclosure of financial liabilities [line items]      
Issued debt instruments 4,944 5,946  
Mortgage Finance Bonds [Member] | Due After 2 Years But Within 3 years [Member]      
Disclosure of financial liabilities [line items]      
Issued debt instruments 3,928 5,034  
Mortgage Finance Bonds [Member] | Due After 3 Years But Within 4 Years [Member]      
Disclosure of financial liabilities [line items]      
Issued debt instruments 2,442 3,997  
Mortgage Finance Bonds [Member] | Due After 4 Years But Within 5 Years [Member]      
Disclosure of financial liabilities [line items]      
Issued debt instruments 1,005 2,480  
Mortgage Finance Bonds [Member] | Due After 5 Years [Member]      
Disclosure of financial liabilities [line items]      
Issued debt instruments $ 170 $ 1,203