Other Operating Charges, net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Gain (Loss) on Disposition of Assets	$ 0.0	$ (24.0)	$ 0.0
Other Operating Income (Expense), Net	(6.3)	17.5	(16.8)
Reorganization Expenses [Member]
Other Cost and Expense, Operating	2.9	8.0	2.3
Environmental Remediation [Member]
Other Cost and Expense, Operating	1.0	0.0	0.0
Facility Closing [Member]
Other Cost and Expense, Operating	0.0	0.0	16.7
Other Expense [Member]
Other Cost and Expense, Operating	2.1	0.8	0.6
Director [Member]
Share-based Payment Arrangement, Expense	$ 0.3	$ (2.3)	$ (2.8)