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Issued Debt Instruments and Other Financial Liabilities (Details 7) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement Line Items [Line Items]      
Issued debt instruments $ 9,500,723 $ 8,115,233 $ 7,093,653
Mortgage Bonds [Member]      
Statement Line Items [Line Items]      
Issued debt instruments 89,924 94,921  
Mortgage Bonds [Member] | Unidad De Fomento [Member]      
Statement Line Items [Line Items]      
Issued debt instruments 89,924 94,921  
Subordinated Bonds [Member]      
Statement Line Items [Line Items]      
Issued debt instruments 818,084 795,957  
Subordinated Bonds [Member] | Unidad De Fomento (funds code) [Member]      
Statement Line Items [Line Items]      
Issued debt instruments 818,084 795,956  
Subordinated Bonds [Member] | Chile, Pesos      
Statement Line Items [Line Items]      
Issued debt instruments $ 1