Environmental (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Loss Contingencies [Line Items]
Environmental remediation costs	$ 0.5	$ 0.1	$ 1.3	$ 4.6
Accrued environmental liability	95.8		$ 95.8		$ 98.1
Estimated time frame to remediate contigency			30
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Accrued environmental liability	$ 81.7		$ 81.7		$ 83.5