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Fair Value of Financial Assets and Liabilities (Details 7) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of financial assets [line items]      
Assets $ 8,148,608 $ 3,100,635 $ 2,238,647
Liability 7,390,654 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 6,748,219 2,133,149  
Financial Liabilities Derivative Contracts With Non-Zero Threshold Collateral Agreement [Member]      
Disclosure of financial assets [line items]      
Liability 517,814 262,683  
Financial Liabilities Derivative Contracts Without Collateral Agreement [Member]      
Disclosure of financial assets [line items]      
Liability 124,621 121,896  
Financial Assets Derivative Contracts With Collateral Agreement Threshold Equal To Zero [Member]      
Disclosure of financial assets [line items]      
Assets 7,478,837 2,639,835  
Financial Assets Derivative Contracts With Non-Zero Threshold Collateral Agreement [Member]      
Disclosure of financial assets [line items]      
Assets 532,298 344,520  
Financial Assets Derivative Contracts Without Collateral Agreement [Member]      
Disclosure of financial assets [line items]      
Assets $ 137,472 $ 116,280