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FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES (Details 6) - CLP ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial assets [line items]    
Assets $ 3,100,635 $ 2,238,647
Liability 2,517,728 2,139,488
Financial Liabilities Derivative Contracts With Collateral Agreement Threshold Equal To Zero [Member]    
Disclosure of financial assets [line items]    
Liability 2,133,149 1,773,471
Financial Liabilities Derivative Contracts With Non-Zero Threshold Collateral Agreement [Member]    
Disclosure of financial assets [line items]    
Liability 262,683 316,840
Financial Liabilities Derivative Contracts Without Collateral Agreement [Member]    
Disclosure of financial assets [line items]    
Liability 121,896 49,177
Financial Assets Derivative Contracts With Collateral Agreement Threshold Equal To Zero [Member]    
Disclosure of financial assets [line items]    
Assets 2,639,835 1,898,220
Financial Assets Derivative Contracts With Non-Zero Threshold Collateral Agreement [Member]    
Disclosure of financial assets [line items]    
Assets 344,520 221,030
Financial Assets Derivative Contracts Without Collateral Agreement [Member]    
Disclosure of financial assets [line items]    
Assets $ 116,280 $ 119,397