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OTHER EXPENSES BY FUNCTION (Details) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
OTHER EXPENSES BY FUNCTION      
Contingencies and non-operating fees $ 1,081,812 $ 17,690,171 $ 10,192,495
Tax on bank debits 3,367,615 4,356,973 4,653,929
Write-offs, disposal and loss of Property, plant and equipment 7,972,976 2,978,194 262,366
Others 5,007,853 1,157,509 948,973
Total other expenses $ 17,430,256 $ 26,182,847 $ 16,057,763