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EQUITY - Earnings per share (Details) - CLP ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Series A      
Earnings per share      
Earnings attributable to shareholders $ 58,095,636 $ 82,725,427 $ 46,001,994
Average weighted number of shares 473,289,301 473,289,301 473,289,301
Earnings per share (in CLP) $ 122.75 $ 174.79 $ 97.20
Series B Share      
Earnings per share      
Earnings attributable to shareholders $ 63,904,169 $ 90,996,501 $ 50,601,377
Average weighted number of shares 473,281,303 473,281,303 473,281,303
Earnings per share (in CLP) $ 135.02 $ 192.27 $ 106.92