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Risk Management (Details 8) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]    
Total $ 80  
Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 59,129,994 $ 48,345,002
Deposits In Banks [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 2,693,342 1,240,578
Cash Items In Process Of Collection [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 355,062 353,757
Financial Derivative Contracts [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 8,148,608 3,100,635
Financial Assets Held For Trading [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 270,204 77,041
Loans And Account Receivable At Amortised Cost / Loans And Account Receivable At FVOCI [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 31,841,485 29,399,589
Debt Instrument At Fair Value Through Other Comprehensive Income [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 4,010,272 2,394,323
Letters Of Credit Issued [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 140,572 223,420
Foreign Letters Of Credit Confirmed [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 70,192 57,038
Performance Guarantees [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 1,929,894 1,954,205
Available Credit Lines [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 8,732,422 8,997,650
Personal guarantees [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total 451,950 133,623
Other Irrevocable Credit Commitments [Member] | Credit Risk [Member]    
Disclosure of detailed information about financial instruments [line items]    
Total $ 485,991 $ 327,297