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Shareholders' equity, net - Investment shares (Details) S/ in Thousands, $ in Thousands | Dec. 31, 2020 PEN (S/) shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($)
--- | --- | --- | ---
Disclosure of Shareholders' equity, net [Line Items] |  |  |
Number of shares outstanding | 350,056,012 | 350,056,012 |
Investment shares | $ |  | $ 791 | $ 791
Total investment shares [Member] |  |  |
Disclosure of Shareholders' equity, net [Line Items] |  |  |
Number of shares outstanding | 271,677 | 271,677 |
Investment shares | S/ 2,717 | $ 791 |
Other reserves of equity [member] | investment shares [Member] |  |  |
Disclosure of Shareholders' equity, net [Line Items] |  |  |
Number of shares outstanding | 744,640 | 744,640 |
Investment shares | S/ 7,447 | $ 2,161 |
Other reserves of equity [member] | Treasury investment shares [Member] |  |  |
Disclosure of Shareholders' equity, net [Line Items] |  |  |
Number of shares outstanding | 472,963 | 472,963 |
Investment shares | S/ (4,730) | $ (1,370) |

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- Definition The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 79 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_79_a_iv&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of equity interest of an entity without share capital that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_e&doctype=Standard -URIDate 2020-01-01 + Details
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