Price-Risk Management Price-Risk Management (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gain (Loss) on Price Risk Derivatives, Net	$ 0.0	$ 0.3
Derivative Liability, Fair Value, Gross Liability	0.0
Derivative, Fair Value, Net	0.0
Other Current Assets [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 0.0