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Accounting Changes (Details) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of financial assets [line items]    
Right of use assets $ 155,987
Subtotals Assets  
Lease liability 158,494
Subtotals Liabilities  
Additions [Member]    
Disclosure of financial assets [line items]    
Right of use assets 154,284  
Subtotals Assets 154,284  
Lease liability 154,284  
Subtotals Liabilities $ 154,284