Contingent Liability Contingent Liability (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
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		$ 0.3