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Other financial liabilities (Details 3) - CLP ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of other financial liabilities [Line Items]      
Financial liabilities $ 386,347,952 $ 263,261,589 $ 160,489,567
Fixed Interest Rate      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities 262,059,336 182,547,357  
Fixed Interest Rate | US Dollar      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities 17,333,622 6,102,155  
Fixed Interest Rate | Chilean Pesos      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities 65,221,552 65,836,938  
Fixed Interest Rate | Unidades de Fomento      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities 167,823,319 100,928,433  
Fixed Interest Rate | Argentinean Pesos      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities 3,357,467 8,987,505  
Fixed Interest Rate | UI [Member]      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities 1,308,837 692,326  
Variable Interest Rate      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities 8,576,258 6,560,842  
Variable Interest Rate | US Dollar      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities 8,070,339 4,843,243  
Variable Interest Rate | Chilean Pesos      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities 0 0  
Variable Interest Rate | Unidades de Fomento      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities 0 0  
Variable Interest Rate | Argentinean Pesos      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities 505,919 1,717,599  
Variable Interest Rate | UI [Member]      
Disclosure of other financial liabilities [Line Items]      
Financial liabilities $ 0 $ 0