Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenue	$ 439.5	$ 414.2	$ 875.3	$ 824.1
Costs and expenses
Cost of services and products, excluding items below	241.2	224.8	479.7	444.9
Selling, general and administrative, excluding items below	95.9	85.4	185.5	169.2
Depreciation and amortization	130.1	71.8	249.6	142.8
Restructuring and severance related charges	0.4	0.4	1.3	0.9
Transaction and integration costs	4.3	1.4	6.6	3.3
Total operating costs and expenses	471.9	383.8	922.7	761.1
Operating (loss) income	(32.4)	30.4	(47.4)	63.0
Interest expense	18.4	33.5	34.9	65.9
Other components of pension and postretirement benefit plans (benefit) expense	(2.6)	1.7	(5.2)	4.3
Other expense (income), net	11.8	(0.2)	11.4	0.0
Loss before income taxes	(60.0)	(4.6)	(88.5)	(7.2)
Income tax (benefit) expense	(14.0)	0.0	(20.5)	0.4
Net loss	(46.0)	(4.6)	(68.0)	(7.6)
Preferred stock dividends	0.0	2.6	0.0	5.2
Net loss applicable to common shareowners	$ (46.0)	$ (7.2)	$ (68.0)	$ (12.8)