Income Taxes (Narrative) (Details) - Valuation Allowance, Operating Loss Carryforwards [Member] - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2014
Domestic Tax Authority [Member]
Valuation Allowance [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 59.3	$ 104.6	$ 38.1
State and Local Jurisdiction [Member]
Valuation Allowance [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 3.3	$ 5.8	$ 3.9