Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues:
Total revenues		$ 231.1	$ 293.8	$ 594.2	$ 848.9
Operating expenses:
Cost of product and services sales, net	[1]	85.9	122.6	241.3	563.3
Research and development		13.5	13.8	41.1	61.6
Selling, general and administrative		38.9	76.6	135.0	247.2
Amortization of intangible assets		16.3	16.3	48.8	48.8
Impairment of long-lived assets		0.0	0.0	0.0	27.2
Total operating expenses		154.6	229.3	466.2	948.1
Income (loss) from operations		76.5	64.5	128.0	(99.2)
Other income (expense):
Interest expense		(15.2)	(8.3)	(44.6)	(56.2)
Gain (loss) on sale of business and assets held for sale		0.0	64.3	(12.2)	24.3
Other, net		(3.7)	21.9	62.3	15.8
Total other income (expense), net		(18.9)	77.9	5.5	(16.1)
Income (loss) before income taxes		57.6	142.4	133.5	(115.3)
Income tax provision		6.4	27.6	26.3	44.0
Net income (loss)		$ 51.2	$ 114.8	$ 107.2	$ (159.3)
Earnings (loss) per common share
Basic (in dollars per share)		$ 0.96	$ 2.16	$ 1.99	$ (3.03)
Diluted (in dollars per share)		$ 0.91	$ 2.06	$ 1.89	$ (3.03)
Weighted average shares outstanding
Basic (in shares)		53.2	53.1	53.9	52.6
Diluted (in shares)		56.5	55.6	56.7	52.6
Product and services sales, net
Revenues:
Total revenues		$ 222.0	$ 283.8	$ 561.4	$ 824.3
Contracts and grants
Revenues:
Total revenues		$ 9.1	$ 10.0	$ 32.8	$ 24.6

[1] (1) Exclusive of intangible asset amortization