Discontinued Operations - Income from Discontinued Operations (Net of Tax) on Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net income from discontinued operations	$ (13.9)	$ 6.8
Disposal Group [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		184.3
Cost of services and products, excluding items below		122.3
Selling, general and administrative, excluding items below		43.9
Depreciation and amortization		5.7
Restructuring and severance related charges		0.4
Transaction costs		4.1
Total operating costs and expenses		176.4
Operating income		7.9
Interest expense		0.4
Other income, net		(0.9)
Income from discontinued operations before income taxes		8.4
Income tax expense		1.6
Net income from discontinued operations		$ 6.8