Environmental (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Loss Contingencies [Line Items]
Environmental remediation costs	$ 0.0	$ 0.9
Accrued environmental liability	$ 98.8		$ 96.4
Estimated time frame to remediate contigency	30
Business Combination, Indemnification Assets, Amount as of Acquisition Date	$ 4.5
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Accrued environmental liability	$ 85.2		$ 82.9