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Investments accounted for using equity method (Details 3) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Investments Accounted For Using Equity Method [Line Items]      
Balance at the beginning of year $ 142,017,781 $ 99,270,280  
Other payments to acquire interests in joint ventures 13,549,638 59,505,559  
Participation in the joint ventures and associates (loss) (16,431,759) (10,815,520) $ (8,914,097)
Capital decrease (11,200,000) 0  
Dividends received (614,591) (423,994)  
Business combinations (241,885) (14,144,241)  
Others 9,018,878 8,625,697  
Total $ 136,098,062 $ 142,017,781 $ 99,270,280