Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Revenue	$ 271.6	$ 275.9
Costs and expenses
Cost of services and products, excluding items below	133.5	136.4
Selling, general and administrative, excluding items below	63.2	65.8
Depreciation and amortization	77.4	112.9
Restructuring and severance related charges	0.2	0.0
Transaction costs	0.1	0.0
Total operating costs and expenses	274.4	315.1
Operating loss	(2.8)	(39.2)
Interest expense	41.6	35.2
Other components of pension and postretirement benefit plans (benefit) expense	(0.5)	0.4
Other (income) expense, net	(30.0)	3.2
Loss from continuing operations before income taxes	(13.9)	(78.0)
Income tax expense (benefit)	33.8	(4.6)
Loss from continuing operations	(47.7)	(73.4)
Income from discontinued operations (net of tax)	6.8	3.5
Net loss	$ (40.9)	$ (69.9)