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Employee benefits - Narrative (Details) CLF in Thousands, $ in Thousands |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 26, 2023 CLF | Apr. 26, 2022 CLF | Mar. 31, 2023 USD ($) | Dec. 31, 2023 USD ($) executive shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 USD ($)
Employee benefits [Line Items] |  |  |  |  |  |
Number of company executives entitled to benefits | executive |  |  |  | 41 |  |
Key management personnel compensation | CLF | CLF 600 | CLF 600 |  |  |  |
Executive compensation plan |  |  |  |  |  |
Employee benefits [Line Items] |  |  |  |  |  |
Number of shares effected | shares |  |  |  | 18,428 | 8,495 |
Key management personnel compensation | $ |  |  |  | $ 9,933 | $ 8,495 |
Financial target compensation plan |  |  |  |  |  |
Employee benefits [Line Items] |  |  |  |  |  |
Number of shares effected | shares |  |  |  | 188,740 |  |
Key management personnel compensation | $ |  |  | $ 2,390 |  | $ 2,251 | $ 5,978
Men |  |  |  |  |  |
Employee benefits [Line Items] |  |  |  |  |  |
Actuarial assumption of retirement age (in years) |  |  |  | 65 years | 65 years | 65 years
Men | Top of range |  |  |  |  |  |
Employee benefits [Line Items] |  |  |  |  |  |
Actuarial assumption of retirement age (in years) |  |  |  | 65 years |  |
Women |  |  |  |  |  |
Employee benefits [Line Items] |  |  |  |  |  |
Actuarial assumption of retirement age (in years) |  |  |  | 60 years | 60 years | 60 years
Women | Top of range |  |  |  |  |  |
Employee benefits [Line Items] |  |  |  |  |  |
Actuarial assumption of retirement age (in years) |  |  |  | 60 years |  |

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- Definition The retirement age used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_144&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2023-01-01 -Paragraph 17 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=24&code=ifrs-tx-2023-en-r&anchor=para_17&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Number Of Company Executives Entitled To Executive Compensation Benefits + References No definition available. + Details
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