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RISK MANAGEMENT (Details 12) - Credit Risk [Member] - CLP ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about financial instruments [line items]    
Total $ 48,345,002 $ 44,320,140
Deposits In Banks [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 1,240,578 839,561
Cash Items In Process Of Collection [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 353,757 668,145
Trading Investments [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 485,736
Investments Under Resale Agreements [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total
Financial Derivative Contracts [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 3,100,635 2,238,647
Loans And Accounts Receivable From Customers And Interbank Loans, Net [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 26,934,757
Available For Sale Investment [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 2,574,546
Letters Of Credit Issued [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 223,420 201,699
Foreign Letters Of Credit Confirmed [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 57,038 75,499
Performance Guarantees [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 1,954,205 1,823,793
Available Credit Lines [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 8,997,650 8,135,489
Personal Guarantees [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 133,623 81,577
Other Irrevocable Credit Commitments [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 327,297 260,691
Financial Assets Held For Trading [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 77,041
Loans And Account Receivable At Amortised Cost / Loans And Account Receivable At FVOCI [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 29,399,589
Debt Instrument At Fair Value Through Other Comprehensive Income [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total $ 2,394,323