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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, 2019
Dec. 31, 2018
Dec. 31, 2017
Movement in deferred income tax accounts      
Opening Balance $ 145,245,948 $ 121,991,585 $ 125,608,802
Increase (decrease) in deferred tax 20,905,005 11,303,016 (3,417,011)
Increase (decrease) due to foreign currency translation 1,934,454 11,951,347 (200,206)
Total movements 22,839,459 23,254,363 (3,617,217)
Ending balance $ 168,085,407 $ 145,245,948 $ 121,991,585