Accumulated Other Comprehensive Loss, Net of Tax Reclassification of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	$ 0.5	$ 1.8	$ 0.5	$ 1.8
Net (Gain) Loss on derivative instruments	(0.2)	(0.4)	(0.6)	(0.7)
Amortization of defined benefit pension and postretirement plan items	1.7	1.6	3.4	3.3
Tax effect	(0.5)	(0.2)	(0.8)	(0.5)
Reclassifications from accumulated other comprehensive loss to earnings, net of tax	$ 1.5	$ 2.8	$ 2.5	$ 3.9