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Income taxes (Details 6) - CLP ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | $ 51,044,712 | $ 54,528,648 |
Deferred Tax Liabilities, Net | 118,729,946 | 131,582,558 |
Deferred tax liability (asset) | (67,685,234) | (77,053,910) | $ (70,809,083)
Accounts receivable impairment provision [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | 1,435,200 | 1,216,921 |
Other non-tax expenses [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | 14,468,076 | 7,984,991 |
Benefits to staff [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | 4,538,995 | 3,785,361 |
Inventory impairment provision [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | 997,834 | 283,440 |
Severance indemnity [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | 10,700,542 | 8,649,423 |
Inventory valuation [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | 2,738,985 | 2,311,192 |
Intangibles [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | 318,970 | 294,209 |
Deferred Tax Liabilities, Net | 18,499,476 | 17,505,666 |
Other Assets [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | 17,632,929 | 22,334,415 |
Unused tax losses [member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | 16,521,177 | 14,888,509 |
Property, plant and equipment depreciation [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred Tax Liabilities, Net | 79,553,048 | 74,003,316 |
Agricultural operation expenses [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred Tax Liabilities, Net | 6,143,794 | 6,123,595 |
Manufacturing indirect activation costs [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred Tax Liabilities, Net | 5,948,931 | 5,786,780 |
Land [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred Tax Liabilities, Net | 24,468,597 | 25,775,281 |
Other liabilitiess [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred Tax Liabilities, Net | 2,424,096 | 9,607,733 |
Subtotal By Deferred Tax Assets [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | 69,352,708 | 61,748,461 |
Deferred Tax Liabilities Offset [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred tax assets | (18,307,996) | (7,219,813) |
Subtotal By Deferred Tax Liabilities [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred Tax Liabilities, Net | 137,037,942 | 138,802,371 |
Deferred tax assets offset [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Deferred Tax Liabilities, Net | $ (18,307,996) | $ (7,219,813) |

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