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Financial results (Details) - CLP ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Financial results [Abstract]      
Finance income $ 3,451,143 $ 13,117,641 $ 15,794,456
Finance costs (28,714,063) (27,720,203) (23,560,662)
Foreign currency exchange differences 2,551,823 (9,054,155) 3,299,657
Result as per adjustment units $ (429,198) $ (8,255,001) $ 742,041