Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Operating Activities
Net income (loss)	$ 51.2	$ 68.0	$ 114.8	$ 9.0	$ 107.2	$ (159.3)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Share-based compensation expense					10.9	13.7
Depreciation and amortization					72.3	82.8
Change in fair value of contingent obligations, net					0.0	0.6
Amortization of deferred financing costs					7.2	5.2
Deferred income taxes					(5.5)	(5.1)
Loss (gain) on sale of business and assets held for sale					12.2	(32.2)
Change in fair value of warrant liability					(1.8)	(1.1)
Impairment of long-lived assets	0.0		0.0		0.0	27.2	$ 27.2
Loss on disposal of assets					3.5	28.9
Other					(8.7)	3.9
Changes in operating assets and liabilities:
Accounts receivable					(26.4)	52.7
Inventories					(44.5)	(35.5)
Prepaid expenses and other assets					27.1	146.3
Accounts payable					(19.8)	(22.8)
Accrued expenses and other liabilities					(27.0)	32.9
Long-term incentive plan accrual					2.3	2.5
Accrued compensation					(21.8)	(9.9)
Income taxes receivable and payable, net					4.6	26.6
Contract liabilities					1.1	(18.8)
Net cash provided by operating activities					92.9	138.6
Investing Activities
Purchases of property, plant and equipment					(9.9)	(21.2)
Proceeds from sale of property, plant and equipment					38.2	7.6
Milestone payments from prior asset divestiture					50.0	0.0
Proceeds from sale of business					0.0	110.2
Purchase of convertible note receivable					(5.0)	0.0
Net cash provided by investing activities					73.3	96.6
Financing Activities
Proceeds from the issuance of debt, net of lender fees					0.0	219.0
Proceeds allocated to warrants issued in conjunction with debt					0.0	13.4
Proceeds allocated to common stock issued in conjunction with debt					0.0	9.3
Principal payments on term loan facility					0.0	(198.2)
Proceeds from revolving credit facility					0.0	65.0
Principal payments on revolving credit facility					0.0	(284.2)
Debt issuance costs					0.0	(14.6)
Proceeds from issuance of common stock upon exercise of stock options					1.0	0.0
Repurchase of debt					(6.9)	0.0
Purchases of treasury stock					(15.8)	0.0
Proceeds from share-based compensation activity					0.0	0.7
Taxes paid for share-based compensation activity					(1.0)	(0.9)
Net cash used in financing activities:					(22.7)	(190.5)
Effect of exchange rate changes on cash, cash equivalents and restricted cash					0.1	0.0
Net change in cash, cash equivalents and restricted cash					143.6	44.7
Cash, cash equivalents and restricted cash, beginning of period		$ 105.6		$ 111.7	105.6	111.7	111.7
Cash, cash equivalents and restricted cash, end of period	249.2		156.4		249.2	156.4	105.6
Supplemental cash flow disclosures:
Cash paid for interest					41.7	55.8
Cash paid for income taxes, net of refunds					27.5	35.5
Non-cash investing and financing activities:
Purchases of property, plant and equipment unpaid at period end					1.8	1.6
Gain on extinguishment of debt					1.1	0.6
Issuance of common stock in conjunction with debt					0.0	7.7
Excise tax liability accrued for common stock repurchases	0.2		0.0		0.2	0.0
Reconciliation of cash and cash equivalents and restricted cash:
Cash and cash equivalents	245.5		149.9		245.5	149.9	99.5
Restricted cash	3.7		6.5		3.7	6.5
Total	$ 249.2		$ 156.4		$ 249.2	$ 156.4	$ 105.6