Environmental (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Loss Contingencies [Line Items]
Environmental remediation costs	$ 0.9	$ 4.6
Accrued environmental liability	$ 97.0		$ 98.1
Estimated time frame to remediate contigency	30
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Accrued environmental liability	$ 82.5		$ 83.5