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RISK MANAGEMENT (Details 2) - CLP ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of risk management strategy related to hedge accounting [line items]    
Total ECL Allowance $ 723 $ 1,440
Credit Risk [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Total ECL Allowance 882,414 791,157
Credit Risk [Member] | Collectively Assessed [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Financial assets 30,213,414 $ 27,725,914
Modified loans $ 1,397,607  
Percentage 4.63%  
Total ECL Allowance $ 882,414  
Modified loans $ 367,901  
Percentage 41.69%  
Credit Risk [Member] | Collectively Assessed [Member] | Stage 1 [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Financial assets $ 26,913,508  
Modified loans  
Total ECL Allowance 153,640  
Modified loans  
Percentage  
Credit Risk [Member] | Collectively Assessed [Member] | Stage 2 [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Financial assets $ 1,796,790  
Modified loans $ 582,513  
Percentage 32.42%  
Total ECL Allowance $ 124,114  
Modified loans $ 44,099  
Percentage 35.25%  
Credit Risk [Member] | Collectively Assessed [Member] | Stage 3 [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Financial assets $ 1,503,116  
Modified loans $ 815,094  
Percentage 54.23%  
Total ECL Allowance $ 603,660  
Modified loans $ 323,802  
Percentage 53.64%