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Investments accounted for using equity method (Details 5) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Investments Accounted For Using Equity Method [Line Items]      
Net sales $ 1,857,593,678 $ 1,822,540,697 $ 1,783,282,337
Net income of year 108,194,856 145,645,660 322,084,531
Other comprehensive income (53,621,696) 14,310,634 37,112,643
Depreciation and amortization (109,813,976) (105,020,934) (93,289,194)
Joint ventures      
Disclosure Of Investments Accounted For Using Equity Method [Line Items]      
Net sales 186,220,125 124,808,755 70,296,729
Operating result (17,903,426) (42,670,725) (21,173,985)
Net income of year (17,637,644) (31,752,130) (19,886,274)
Other comprehensive income 10,808,355 (49,363,608) (24,720,721)
Depreciation and amortization $ (16,209,859) $ (11,386,595) $ (2,656,715)