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LOANS AND ACCOUNTS RECEIVABLE FROM CUSTOMERS and INTERBANK LOANS (under IAS 39) (Details 7) - Non-performing Loans (collectively evaluated) [Member]
$ in Millions
Dec. 31, 2017
CLP ($)
Disclosure of financial assets [line items]  
Total $ 633,461 [1]
Up To 3 Months [Member]  
Disclosure of financial assets [line items]  
Total 614,774
Less Than 90 Days [Member]  
Disclosure of financial assets [line items]  
Total 18,687
Commercial Loans [Member]  
Disclosure of financial assets [line items]  
Total 368,522 [1]
Commercial Loans [Member] | Up To 3 Months [Member]  
Disclosure of financial assets [line items]  
Total 362,968
Commercial Loans [Member] | Less Than 90 Days [Member]  
Disclosure of financial assets [line items]  
Total 5,554
Mortgage Loans [Member]  
Disclosure of financial assets [line items]  
Total 161,768
Mortgage Loans [Member] | Up To 3 Months [Member]  
Disclosure of financial assets [line items]  
Total 159,265
Mortgage Loans [Member] | Less Than 90 Days [Member]  
Disclosure of financial assets [line items]  
Total 2,503
Consumer Loans [Member]  
Disclosure of financial assets [line items]  
Total 103,171 [1]
Consumer Loans [Member] | Up To 3 Months [Member]  
Disclosure of financial assets [line items]  
Total 92,541
Consumer Loans [Member] | Less Than 90 Days [Member]  
Disclosure of financial assets [line items]  
Total $ 10,630
[1] Non-performing loans include the aggregate unpaid principal and accrued but unpaid interest on all loans with at least one installment at least 90 days past-due.