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Fair Value of Financial Assets and Liabilities (Details) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Deposits and interbank borrowings [Member]    
Liabilities    
Financial Liabilities $ 26,010,067 $ 23,597,863
Financial Liabilities, Fair value 26,200,921 23,770,106
Financial derivative contracts [Member]    
Liabilities    
Financial Liabilities 7,390,654 2,517,728
Financial Liabilities, Fair value 7,390,654 2,517,728
Financial Liabilities Issued Debt Instruments And Other Financial Liabilities Category [Member]    
Liabilities    
Financial Liabilities 9,727,081 8,330,633
Financial Liabilities, Fair value 10,718,997 8,605,135
Guarantees received (margin accounts) [Member]    
Liabilities    
Financial Liabilities 994,714 371,512
Financial Liabilities, Fair value 994,714 371,512
Financial derivative contracts [Member]    
Assets    
Financial Assets 8,148,608 3,100,635
Financial Assets, Fair value 8,148,608 3,100,635
Financial Assets Held For Trading [Member]    
Assets    
Financial Assets 270,204 77,041
Financial Assets, Fair value 270,204 77,041
Loans And Accounts Receivable At Amortised Cost [Member]    
Assets    
Financial Assets 31,775,420 29,331,001
Financial Assets, Fair value 34,602,793 30,505,023
Loans And Accounts Receivable At FVOCI Net [Member]    
Assets    
Financial Assets 66,065 68,588
Financial Assets, Fair value 66,065 68,588
Debt Instrument At FVOCI [Member]    
Assets    
Financial Assets 4,010,272 2,394,323
Financial Assets, Fair value 4,010,272 2,394,323
Guarantee Deposits (Margin Accounts) [Member]    
Assets    
Financial Assets 314,616 170,232
Financial Assets, Fair value $ 314,616 $ 170,232