Other Expenses and Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income and Expenses [Abstract]
Investment (loss) income	$ (0.3)	$ 0.0	$ 0.2
Gain on disposal of subsidiary	0.0	1.6	0.0
Curtailment and settlement (loss) gain on pension and postretirement benefits, net	(4.7)	0.5	0.0
Other	0.0	0.5	0.1
Total	$ (5.0)	$ 2.6	$ 0.3