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Financial Assets Held for Trading (Details) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of fair value measurement of assets [line items]    
Total $ 270,204 $ 77,041
Other Chilean Securities [Member]    
Disclosure of fair value measurement of assets [line items]    
Total
Other Chilean Securities [Member] | Time Deposits In Chilean Financial Institutions [Member]    
Disclosure of fair value measurement of assets [line items]    
Total
Other Chilean Securities [Member] | Mortgage Finance Bonds Of Chilean Financial Institutions [Member]    
Disclosure of fair value measurement of assets [line items]    
Total
Other Chilean Securities [Member] | Chilean Financial Institution Bonds [Member]    
Disclosure of fair value measurement of assets [line items]    
Total
Other Chilean Securities [Member] | Chilean Corporate Bonds [Member]    
Disclosure of fair value measurement of assets [line items]    
Total
Other Chilean Securities [Member] | OthersChileanSecuritiesMember    
Disclosure of fair value measurement of assets [line items]    
Total
Foreign Financial Securities [Member]    
Disclosure of fair value measurement of assets [line items]    
Total 5,883
Foreign Financial Securities [Member] | Foreign Central Banks And Government Securities [Member]    
Disclosure of fair value measurement of assets [line items]    
Total
Foreign Financial Securities [Member] | Other Foreign Financial Instruments [Member]    
Disclosure of fair value measurement of assets [line items]    
Total 5,883
Investments In Mutual Funds [Member]    
Disclosure of fair value measurement of assets [line items]    
Total
Investments In Mutual Funds [Member] | Funds Managed By Related Entities [Member]    
Disclosure of fair value measurement of assets [line items]    
Total
Investments In Mutual Funds [Member] | Funds Managed By Others [Member]    
Disclosure of fair value measurement of assets [line items]    
Total
Chilean Central Bank And Government Securities [Member]    
Disclosure of fair value measurement of assets [line items]    
Total 270,204 71,158
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Bonds [Member]    
Disclosure of fair value measurement of assets [line items]    
Total 1,952 22,947
Chilean Central Bank And Government Securities [Member] | Chilean Central Bank Notes [Member]    
Disclosure of fair value measurement of assets [line items]    
Total
Chilean Central Bank And Government Securities [Member] | Other Chilean Central Bank And Government Securities [Member]    
Disclosure of fair value measurement of assets [line items]    
Total $ 268,252 $ 48,211