Commitments and Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Leases, Operating [Abstract]
Rent expense	$ 21.1	$ 22.6	$ 23.1
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2018	20.0
2019	13.5
2020	12.5
2021	11.3
2022	6.2
Thereafter	13.9
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Purchase obligation, property, plant, and equipment	62.8
Accrual for Environmental Loss Contingencies [Abstract]
Accrual for environmental remediation obligations	12.0
Accrued environmental loss contingencies recorded in other current liabilities	7.0
Components of Environmental Loss Accrual [Abstract]
Federal Superfund and comparable state-managed sites	2.0
Formerly owned or operated sites	8.0
Owned or controlled sites at which Company operations have been discontinued	1.0
Sites utilized by the company in its ongoing operations	1.0
Reasonably possible amount by which current matters may exceed reserves	$ 15.0