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LOANS AND ACCOUNTS RECEIVABLE FROM CUSTOMERS and INTERBANK LOANS (under IAS 39) (Details 10) - CLP ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Disclosure of financial assets [line items]    
Total $ 509,305 $ 529,345
Consumer Loans [Member]    
Disclosure of financial assets [line items]    
Total 508,998 526,293
Interbank Loans [Member]    
Disclosure of financial assets [line items]    
Total $ 307 $ 3,052