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Risk Management (Details 6) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of risk management strategy related to hedge accounting [line items]    
Reported ECL allowance $ 2,042 $ 723
Macro Economic [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Reported ECL allowance 896,095 882,414
Gross carrying amount $ 32,671,515 $ 30,213,415
Reported ECL Coverage 2.74% 2.92%
Macro Economic [Member] | Favorable Scenario 2 [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Reported ECL allowance $ 797,501 $ 745,089
Reported ECL Coverage 2.44% 2.46%
Macro Economic [Member] | Favorable Scenario 1 [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Reported ECL allowance $ 835,956 $ 815,113
Reported ECL Coverage 2.56% 2.69%
Macro Economic [Member] | Base Scenario [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Reported ECL allowance $ 884,480 $ 879,358
Reported ECL Coverage 2.71% 2.90%
Macro Economic [Member] | Unfavorable Scenario 2 [Member]    
Disclosure of risk management strategy related to hedge accounting [line items]    
Reported ECL allowance $ 929,802 $ 949,329
Reported ECL Coverage 2.85% 3.13%
Macro Economic [Member] | UnfavorableScenarioTwo1Member    
Disclosure of risk management strategy related to hedge accounting [line items]    
Reported ECL allowance $ 962,437 $ 970,563
Reported ECL Coverage 2.95% 3.21%