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Fair Value of Financial Assets and Liabilities-Transfers between levels (Details) - Instruments Issued By Chilean Government And Central Bank [Member] - CLP ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Financial assets held-for-trading [Member]    
Disclosure of fair value measurement of assets [line items]    
Transfers from level 1 to level 2 $ 84 $ 496
Transfers from level 2 to level 1 17
Instruments Issued By Foreign Institutions [Member]    
Disclosure of fair value measurement of assets [line items]    
Transfers from level 1 to level 2  
Transfers from level 2 to level 1  
Financial assets at fair value through other comprehensive income [Member]    
Disclosure of fair value measurement of assets [line items]    
Transfers from level 1 to level 2  
Transfers from level 2 to level 1