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Fair Value of Financial Assets and Liabilities: (Details) - Schedule of impact on the fair value of Level 3 financial instruments using alternative assumptions that are reasonably possible - CLP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Financial assets held-for-trading    
Financial Assets $ 42,181 $ 62,259
Sensitivity to changes in key assumptions of models (533) (552)
Financial Assets held-for-trading [Member]    
Financial assets held-for-trading    
Financial Assets 5,494 55,094
Sensitivity to changes in key assumptions of models (8) (466)
Debt securities [member]    
Financial assets held-for-trading    
Financial Assets 36,687 7,165
Sensitivity to changes in key assumptions of models (525) (86)
Level 3 | Other instruments issued in Chile | Financial Assets held-for-trading [Member]    
Financial assets held-for-trading    
Financial Assets 5,494 55,094
Sensitivity to changes in key assumptions of models (8) (466)
Level 3 | Other instruments issued in Chile | Debt securities [member] | Financial assets at fair value through other comprehensive income    
Financial assets held-for-trading    
Financial Assets 36,596 7,069
Sensitivity to changes in key assumptions of models (525) (86)
Level 3 | Instruments issued by foreign institutions | Trading equity instruments | Financial assets at fair value through other comprehensive income    
Financial assets held-for-trading    
Financial Assets $ 91 $ 96