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Nature of cost and expense (Details) - CLP ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Nature of cost and expense [Line Items]      
Direct cost $ 757,097,886 $ 694,307,741 $ 650,386,343
Personnel expense [1] 263,948,893 237,122,374 232,141,632
Transportation and distribution 247,520,979 245,696,284 243,907,283
Advertising and promotion 105,887,909 117,889,341 118,003,908
Depreciation and amortization 109,813,976 105,020,934 93,289,194
Materials and maintenance 53,584,604 49,356,159 46,610,947
Energy 28,062,380 29,922,632 29,309,465
Leases 15,049,043 12,798,957 17,727,367
Other expenses 109,333,035 122,202,733 111,639,503
Total $ 1,690,298,705 $ 1,614,317,155 $ 1,543,015,642
[1] See Note 30 - Natures of cost and expense.