Environmental (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Loss Contingencies [Line Items]
Environmental remediation costs	$ 3.0	$ 7.6	$ 1.3
Accrued environmental liability	103.7	$ 103.7		$ 104.5
Estimated time frame to remediate contigency		30
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Accrued environmental liability	$ 84.0	$ 84.0		$ 81.8