Price-Risk Management Price-Risk Management (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gain (Loss) on Price Risk Derivatives, Net	$ 0.2	$ 1.3	$ (0.9)
Derivative Asset, Fair Value, Gross Asset	0.0
Derivative Liability, Fair Value, Gross Liability	0.0
Derivative, Fair Value, Net	$ 0.0