Segment Financial Information - Schedule of Reconciliation of Income Before Earnings in Affiliated Companies and Income Taxes to Adjusted EBITDA and Corporate Charges (Details) € in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 EUR (€)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Income (loss) before earnings in affiliated companies and income taxes		$ (34,800,000)		$ 53,300,000	$ 163,300,000
LTIP and other non-operating charges		14,200,000		14,300,000	13,500,000
Depreciation and amortization of intangible assets, right of use assets, and property, plant and equipment		131,900,000		125,300,000	113,000,000.0
Recovery		(9,200,000)	€ 7.9	55,700,000	0
Loss (recovery) due to misappropriation of assets, net		(6,900,000)		59,300,000	0
Professional fees related to misappropriation of assets		2,300,000		3,600,000	0
Goodwill impairment	$ 80,800,000	80,800,000		0	0
Equity in earnings of affiliated companies, net of tax		500,000		600,000	500,000
Interest and other financial expense, net		62,300,000		49,400,000	50,900,000
Reclassification of actuarial (gains)/losses from AOCI		0		0	(8,900,000)
Adjusted EBITDA		248,000,000.0		302,200,000	332,300,000
LTIP		13,600,000		15,300,000	15,400,000
Environmental reserves		0		0	(2,200,000)
Other non-operating		600,000		(1,000,000.0)	300,000
LTIP and other non-operating charges		14,200,000		14,300,000	13,500,000
Corporate
Segment Reporting Information [Line Items]
LTIP and other non-operating charges		1,100,000		0	(700,000)
Depreciation and amortization of intangible assets, right of use assets, and property, plant and equipment		0		0	0
Loss (recovery) due to misappropriation of assets, net		(6,900,000)		59,300,000
Goodwill impairment		0
Equity in earnings of affiliated companies, net of tax		0		0	0
Adjusted EBITDA		0		0	0
LTIP and other non-operating charges		$ 1,100,000		$ 0	$ (700,000)