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Prepaid expenses - Additional information (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Prepaid expenses |  |
Non-current lease prepayments | $ 25,692 | $ 26,582
Life of underlying assets | P35Y |
Empresa de Generacin Huanza S.A |  |
Prepaid expenses |  |
Non-current lease prepayments | $ 31,007,190 |

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- Definition Prepaid expenses + References No definition available. + Details
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- Definition The length of life of underlying assets. + References No definition available. + Details
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- Definition The amount of non-current prepayments for leases. [Refer: Non-current prepayments] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard -URIDate 2020-01-01 + Details
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- Details
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