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Summary of significant accounting policies (Details 1) - CLP ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Summary Of Significant Accounting Policies [Abstract] |  |  |
Gains (losses) derived from net monetary position | $ (867,802) | $ (6,433,651) | $ 2,312,604

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- Definition The gains (losses) representing the difference resulting from the restatement of non-monetary assets, owners' equity and items in the statement of comprehensive income and the adjustment of index linked assets and liabilities in hyperinflationary reporting. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 29 -IssueDate 2020-01-01 -Paragraph 9 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=29&code=ifrs-tx-2020-en-r&anchor=para_9&doctype=Standard -URIDate 2020-01-01 + Details
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