Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Tax Examination [Line Items]
Effective Tax Rate	137.50%	18.20%	(19.70%)	7.90%
Income tax (benefit) expense	$ (4.4)	$ 7.3	$ (16.4)	$ (7.2)
Domestic Tax Authority | Internal Revenue Service (IRS)
Income Tax Examination [Line Items]
Income tax examination, Increase (decrease) in liability from prior year	5.6		5.6
Income tax examination, interest expense	(1.5)
State and Local Jurisdiction
Income Tax Examination [Line Items]
Liability (refund) adjustment from settlement with taxing authority	(1.7)		(1.7)
Tax Years 2005 Through 2007 | Domestic Tax Authority | Internal Revenue Service (IRS)
Income Tax Examination [Line Items]
Liability (refund) adjustment from settlement with taxing authority	4.7		4.7
Income tax (benefit) expense	$ (2.3)