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Summary of significant accounting policies (Details 2) - $ / perunit
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
US Dollar [Member]      
Statement [Line Items]      
Closing foreign exchange rate 855.86 844.69 710.95
Cumulative monthly avarege US Dollar [Member]      
Statement [Line Items]      
Closing foreign exchange rate 872.33 759.27 792.22
Euros [Member]      
Statement [Line Items]      
Closing foreign exchange rate 915.95 955.64 873.3
Argentinean Pesos [Member]      
Statement [Line Items]      
Closing foreign exchange rate 4.83 8.22 8.45
Uruguayan Peso [Member]      
Statement [Line Items]      
Closing foreign exchange rate 21.36 18.91 16.79
Canadian Dollar [Member]      
Statement [Line Items]      
Closing foreign exchange rate 632.61 660.79 557
Sterling Pound [Member]      
Statement [Line Items]      
Closing foreign exchange rate 1,033.9 1,139.32 967.15
Paraguayan Guarani [Member]      
Statement [Line Items]      
Closing foreign exchange rate 0.12 0.12 0.1
Swiss Franc [Member]      
Statement [Line Items]      
Closing foreign exchange rate 927.36 923.66 804.97
Bolivians [Member]      
Statement [Line Items]      
Closing foreign exchange rate 122.97 121.36 102.15
Australian Dollar [Member]      
Statement [Line Items]      
Closing foreign exchange rate 583.01 612.23 545.88
Danish Krone [Member]      
Statement [Line Items]      
Closing foreign exchange rate 123.18 128.51 117.4
Colombian Peso [Member]      
Statement [Line Items]      
Closing foreign exchange rate 0.18 0.21 0.21
Brazilian Real [Member]      
Statement [Line Items]      
Closing foreign exchange rate 161.96 151.68 137.33
Unidades de Fomento [Member]      
Statement [Line Items]      
Closing foreign exchange rate [1] 35,110.98 30,991.74 29,070.33
Unidad de indexada [Member]      
Statement [Line Items]      
Closing foreign exchange rate [2] 118.93 98.26 80.45
[1] The Unidad de Fomento (UF) is a Chilean inflation-indexed, Chilean peso-denominated monetary unit. The UF rate is set daily in advance based on changes in the previous month´s inflation rate.
[2] The Unidad Indexada (UI) is a Uruguay inflation-indexed, Uruguayan peso-denominated monetary unit. The UI rate is set daily in advance based on changes in the previous month´s inflation rate.