Contingent Liability Contingent Liability (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Environmental Remediation Term	10 years
Environmental Exit Costs, Reasonably Possible Additional Losses, Low Estimate	$ 0.3
Environmental Exit Costs, Reasonably Possible Additional Losses, High Estimate	1.4
Capitalizable Environmental Exit Costs	0.3
Environmental Exit Costs, Liability for Remediation	$ 0.2	$ 0.3