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Income taxes (Details) - CLP ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
IncomeTaxes [Line Items] |  |
Current tax assets, current | $ 10,865,347 | $ 15,132,290
Refundable tax previous year |  |
IncomeTaxes [Line Items] |  |
Current tax assets, current | 3,911,803 | 5,484,216
Argentinean tax credits [Member] |  |
IncomeTaxes [Line Items] |  |
Current tax assets, current | 3,200,454 | 1,140,073
Monthly provisions [Member] |  |
IncomeTaxes [Line Items] |  |
Current tax assets, current | 3,498,109 | 8,136,478
Payment of absorbed profit provision [Member] |  |
IncomeTaxes [Line Items] |  |
Current tax assets, current | 1,154 | 4,830
Other credits [Member] |  |
IncomeTaxes [Line Items] |  |
Current tax assets, current | $ 253,827 | $ 366,693

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