Long-term debt - Schedule of borrowings (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Non-current portion of non-current borrowings, by type [abstract]
Total long-term debt	$ 394.9	$ 491.0
Senior unsecured notes - due May 15, 2025
Non-current portion of non-current borrowings, by type [abstract]
Total long-term debt	0.0	97.1
Senior unsecured notes - due July 15, 2027
Non-current portion of non-current borrowings, by type [abstract]
Total long-term debt	394.9	393.9
Credit Facility
Non-current portion of non-current borrowings, by type [abstract]
Total long-term debt	$ 0.0	$ 0.0

The non-current portion of non-current borrowings. [Refer: Borrowings]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard
-URIDate 2022-03-24

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant