Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Revenue	$ 276.4	$ 271.6
Costs and expenses
Cost of services and products, excluding items below	122.1	133.5
Selling, general and administrative, excluding items below	55.0	63.2
Depreciation and amortization	84.6	77.4
Restructuring and severance related charges	3.7	0.2
Transaction and integration costs	0.3	0.1
Total operating costs and expenses	265.7	274.4
Operating income (loss)	10.7	(2.8)
Interest expense	33.1	41.6
Other components of pension and postretirement benefit plans benefit	(1.4)	(0.5)
Other income, net	(7.1)	(30.0)
Loss from continuing operations before income taxes	(13.9)	(13.9)
Income tax expense	0.5	33.8
Loss from continuing operations	(14.4)	(47.7)
(Loss) income from discontinued operations (net of tax)	(13.9)	6.8
Net loss	$ (28.3)	$ (40.9)