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INCOME TAX EXPENSE AND DEFERRED TAXES - Movement in deferred income tax accounts (Details) - CLP ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Movement in deferred income tax accounts      
Opening Balance $ 168,085,407 $ 145,245,948 $ 121,991,585
Increase (decrease) in deferred tax 4,411,619 20,905,005 11,303,016
Increase (decrease) due to foreign currency translation (20,753,348) 1,934,454 11,951,347
Total movements (16,341,729) 22,839,459 23,254,363
Ending balance $ 151,743,678 $ 168,085,407 $ 145,245,948