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Financial results (Details) - CLP ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of Financial results [Abstract]      
Finance income $ 15,794,456 $ 5,050,952 $ 5,680,068
Finance costs (23,560,662) (24,166,313) (20,307,238)
Foreign currency exchange differences (3,299,657) 2,563,019 (456,995)
Result as per adjustment units $ 742,041 $ (110,539) $ (2,246,846)