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Investments accounted for using equity method (Details) - 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]      
Investments accounted for using equity method $ 131,106,785 $ 136,098,062 $ 142,017,781
Associates [member]      
Disclosure Of Investments Accounted For Using Equity Method [Line Items]      
Investments accounted for using equity method 1,360,541 1,168,438  
Associates [member] | Other companies [Member]      
Disclosure Of Investments Accounted For Using Equity Method [Line Items]      
Investments accounted for using equity method 1,360,541 1,168,438  
Joint ventures [member]      
Disclosure Of Investments Accounted For Using Equity Method [Line Items]      
Investments accounted for using equity method $ 129,746,244 134,929,624  
Joint ventures [member] | Cerveceria Austral S.A. [Member]      
Disclosure Of Investments Accounted For Using Equity Method [Line Items]      
Proportion of ownership interest in joint venture 50.00%    
Investments accounted for using equity method $ 9,968,250 8,607,390  
Joint ventures [member] | Foods Compania de Alimentos CCU S.A. [Member]      
Disclosure Of Investments Accounted For Using Equity Method [Line Items]      
Proportion of ownership interest in joint venture 50.00%    
Investments accounted for using equity method $ 0 1,709,803  
Joint ventures [member] | Central Cervecera de Colombia S.A.S. [Member]      
Disclosure Of Investments Accounted For Using Equity Method [Line Items]      
Proportion of ownership interest in joint venture 50.00%    
Investments accounted for using equity method $ 28,125,779 25,334,386  
Joint ventures [member] | Zona Franca Central Cervecera S.A.S. [Member]      
Disclosure Of Investments Accounted For Using Equity Method [Line Items]      
Proportion of ownership interest in joint venture 50.00%    
Investments accounted for using equity method $ 91,652,215 $ 99,278,045