Restructuring Charges (Description of Reserves) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Details activity within the restructuring reserves
Beginning Balance	$ 0.0	$ 0.9
Incurred in 2017	3.2	1.8
Cash Utilization	(2.4)	(2.7)
Non-Cash Utilization and Other	(0.6)	0.0
Ending Balance	0.2	0.0
Severance and Related Expense [Member]
Details activity within the restructuring reserves
Beginning Balance	0.0	0.7
Incurred in 2017	2.0	(0.2)
Cash Utilization	(1.8)	(0.5)
Non-Cash Utilization and Other	0.0	0.0
Ending Balance	0.2	0.0
Asset Write-offs and Accelerated Depreciation [Member]
Details activity within the restructuring reserves
Beginning Balance	0.0	0.0
Incurred in 2017	0.8	0.3
Cash Utilization	(0.2)	(0.2)
Non-Cash Utilization and Other	(0.6)	(0.1)
Ending Balance	0.0	0.0
Equipment Moves [Member]
Details activity within the restructuring reserves
Beginning Balance	0.0	0.0
Incurred in 2017	0.0	0.0
Cash Utilization	0.0	0.0
Non-Cash Utilization and Other	0.0	0.0
Ending Balance	0.0	0.0
Lease Termination [Member]
Details activity within the restructuring reserves
Beginning Balance	0.0	0.2
Incurred in 2017	0.0	0.0
Cash Utilization	0.0	(0.2)
Non-Cash Utilization and Other	0.0	0.0
Ending Balance	0.0	0.0
Other [Member]
Details activity within the restructuring reserves
Beginning Balance	0.0	0.0
Incurred in 2017	0.4	1.7
Cash Utilization	(0.4)	(1.8)
Non-Cash Utilization and Other	0.0	0.1
Ending Balance	$ 0.0	$ 0.0