Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash flows from operating activities:
Net income (loss)	$ (70.1)	$ 44.2	$ 103.5
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation of property, plant and equipment and amortization of intangible assets and right of use assets	131.9	125.3	113.0
Impairment of property, plant and equipment and intangible assets	80.8	0.0	0.0
Amortization of debt issuance costs	2.0	1.5	2.7
Stock based compensation	13.6	15.3	15.4
Deferred tax (benefit) provision	(6.8)	(19.7)	6.3
Foreign currency transactions	(9.3)	(1.7)	5.0
Reclassification of actuarial gains from AOCI	0.0	0.0	(8.9)
Other operating non-cash items, net	1.4	1.8	0.8
Changes in operating assets and liabilities, net:
Trade receivables	17.4	13.8	131.2
Inventories	36.5	(19.6)	(7.7)
Trade payables	15.3	(14.8)	1.6
Other provisions	8.0	1.4	(4.4)
Income tax liabilities	1.4	(17.8)	(2.1)
Other assets and liabilities, net	(6.3)	(4.4)	(10.5)
Net cash provided by operating activities	215.8	125.3	345.9
Cash flows from investing activities:
Acquisition of property, plant and equipment	(161.0)	(206.7)	(172.8)
Net cash used in investing activities	(161.0)	(206.7)	(172.8)
Cash flows from financing activities:
Proceeds from long-term debt borrowings	0.0	0.0	12.6
Repayments of long-term debt	(8.9)	(4.1)	(3.0)
Payments for debt issue costs	(4.6)	(0.2)	(2.7)
Cash inflows related to current financial liabilities	153.4	263.1	284.4
Cash outflows related to current financial liabilities	(151.6)	(138.1)	(417.9)
Dividends paid to stockholders	(4.7)	(4.8)	(4.9)
Repurchases of Common stock	(24.8)	(26.6)	(65.6)
Net cash provided by (used in) financing activities	(41.2)	89.3	(197.1)
Increase (decrease) in cash, cash equivalents and restricted cash	13.6	7.9	(24.0)
Cash, cash equivalents and restricted cash at the beginning of the period	44.7	40.2	63.4
Effect of exchange rate changes on cash	2.9	(3.4)	0.8
Cash, cash equivalents and restricted cash at the end of the period	61.2	44.7	40.2
Less restricted cash at the end of the period	0.5	0.5	2.7
Cash and cash equivalents at the end of the period	60.7	44.2	37.5
Supplemental Cash flow information:
Cash paid for interest, net	(54.3)	(48.8)	(38.9)
Cash paid for income taxes	(41.2)	(47.3)	(56.1)
Non-cash activity:
Lease liabilities	$ 30.8	$ 28.9	$ 30.0