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Long-term debt - Narrative (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Apr. 30, 2023 USD ($) covenant
Long Term Debt [Line Items] |  |  |
Borrowings | $ 1,578.0 | $ 1,503.0 |
Repayments of non-current borrowings | 0.0 | $ 101.6 |
Senior unsecured notes - due July 15, 2027 |  |  |
Long Term Debt [Line Items] |  |  |
Borrowings | $ 400.0 |  |
Borrowings, interest rate | 7.50% |  |
Borrowings, covenant, interest coverage ratio, minimum | 2 |  |
Credit Facility |  |  |
Long Term Debt [Line Items] |  |  |
Borrowing limit |  |  | $ 400.0
Number of covenants | covenant |  |  | 3
Credit facility full interest rate | 2.75% | 2.75% |
Standby fees on undrawn amounts under credit facility | 0.56% | 0.62% |
Issuance of senior unsecured notes, net of transaction costs | $ 0.0 |  |
Letters of credit issued | $ 26.7 | $ 27.5 |
Credit Facility | Bottom of range |  |  |
Long Term Debt [Line Items] |  |  |
Credit facility full interest rate |  |  | 1.25%
Standby fees on undrawn amounts under credit facility | 0.51% |  |
Credit Facility | Top of range |  |  |
Long Term Debt [Line Items] |  |  |
Credit facility full interest rate |  |  | 3.75%
Standby fees on undrawn amounts under credit facility | 0.84% |  |

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- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_7&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The cash inflow from non-current borrowings obtained. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 17 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_17&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Borrowing Facilities, Maximum Borrowing Capacity + References No definition available. + Details
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- Definition Borrowings, Covenant, Interest Coverage Ratio, Minimum + References No definition available. + Details
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- Details
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