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Intangible assets and goodwill - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Line Items]
Goodwill		$ 0	$ 0
Goodwill impairment		$ 0	$ 218,200,000	$ 6,700,000
MCM Products
Goodwill [Line Items]
Goodwill impairment	$ 218,200,000

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- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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