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Income taxes (Details textual) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
IncomeTaxes [Line Items] |  |  |
Applicable tax rate | 27.00% | 27.00% | 27.00%
Description of expiry date of deductible temporary differences, unused tax losses and unused tax credits | In accordance with current tax laws in Chile, tax losses do not expire and can be applied indefinitely. Argentina, Uruguay and Paraguay tax losses expire after 5 years and Bolivia tax losses expire after 3 years. |  |
Income tax rate Increase | 25.00% | 30.00% | (0.01%)
Percentage of Withholding Tax Rate On Dividends | 13.00% | 7.00% |
CHILE |  |  |
IncomeTaxes [Line Items] |  |  |
Income tax rate Increase | 24.67% | 21.54% | 29.71%
ARGENTINA |  |  |
IncomeTaxes [Line Items] |  |  |
Applicable tax rate | 35.00% |  |
Applicable excise tax rate |  | 8.00% |
Earnings retention ratio | 13.00% | 0.00% |
ARGENTINA | Scenario plan for tax rate [Member] |  |  |
IncomeTaxes [Line Items] |  |  |
Applicable tax rate | 25.00% | 25.00% | (30.00%)
Applicable excise tax rate |  |  | 14.00%
Earnings retention ratio |  | (7.00%) | 13.00%

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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The description of the expiry date (if any) of deductible temporary differences, unused tax losses and unused tax credits for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_e&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from a change in tax rate. [Refer: Average effective tax rate; Applicable tax rate] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2020-01-01 + Details
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