Other Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Other Income And Expenses [Abstract]
Interest income		$ 0.1
Net periodic postretirement benefit cost	$ (1.4)	(0.6)
Unrealized loss on equity securities	(0.4)	(0.1)
All other, net	0.2	0.2
Other expense, net	$ (1.6)	$ (0.4)