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Basis of Presentation (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2013	Dec. 31, 2013 Scenario, Forecast [Member]
Adjustments to Additional Paid in Capital, Stock Split			$ 12.5
Net loss	(44.3)	4.5	(87.2)	(116.3)	1,200.0	491.1
Cash and cash equivalents	128.4	303.3	128.4	303.3	292.9	37.6		250.0
Long-Term Debt	530.0		530.0		530.0
Line of Credit Facility, Maximum Borrowing Capacity							$ 110.0
NYSE Minimum 30 Day Average Closing Price	$ 1.00		$ 1.00

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