Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues:
Total revenues		$ 140.9	$ 254.7	$ 363.1	$ 555.1
Operating expenses:
Cost of product and services sales, net	[1]	66.9	296.1	155.4	440.7
Research and development		12.5	32.7	27.6	47.8
Selling, general and administrative		43.7	85.9	96.1	170.6
Amortization of intangible assets		16.2	16.3	32.5	32.5
Impairment of long-lived assets		0.0	27.2	0.0	27.2
Total operating expenses		139.3	458.2	311.6	718.8
Income (loss) from operations		1.6	(203.5)	51.5	(163.7)
Other income (expense):
Interest expense		(14.7)	(23.6)	(29.4)	(47.9)
Loss on assets held for sale		0.0	(40.0)	(12.2)	(40.0)
Other, net		(3.7)	(2.7)	66.0	(6.1)
Total other income (expense), net		(18.4)	(66.3)	24.4	(94.0)
Income (loss) before income taxes		(16.8)	(269.8)	75.9	(257.7)
Income tax provision (benefit)		(4.8)	13.3	19.9	16.4
Net income (loss)		$ (12.0)	$ (283.1)	$ 56.0	$ (274.1)
Earnings (loss) per common share
Basic (in dollars per share)		$ (0.22)	$ (5.38)	$ 1.03	$ (5.23)
Diluted (in dollars per share)		$ (0.22)	$ (5.38)	$ 0.99	$ (5.23)
Weighted average shares outstanding
Basic (in shares)		54.2	52.6	54.3	52.4
Diluted (in shares)		54.2	52.6	56.7	52.4
Product and services sales, net
Revenues:
Total revenues		$ 130.3	$ 248.1	$ 339.4	$ 540.5
Contracts and grants
Revenues:
Total revenues		$ 10.6	$ 6.6	$ 23.7	$ 14.6

[1] (1) Exclusive of intangible asset amortization