Commitments and Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Leased Assets [Line Items]
Accrual for environmental loss contingencies	$ 5.2	$ 14.2
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating lease rent expense	28.8	$ 25.7	$ 24.7
Due in 2017	18.7
Due in 2018	16.7
Due in 2019	13.0
Due in 2020	9.3
Due in 2021	7.0
Due thereafter	$ 23.1
Maximum
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
Operating lease, contract term	12 years