Long-Term Debt -Senior Notes due 2015 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended					6 Months Ended					1 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Senior PIK Exchange Notes due 2015 [Member]	Jun. 30, 2013 Senior PIK Interest Exchange Notes due 2015 [Member]	Jun. 30, 2013 Senior Exchange Notes due 2015 [Member]	Jun. 30, 2012 Senior Notes, due 2015 [Member]	Jun. 30, 2013 Senior Notes, due 2015 [Member]	Dec. 31, 2012 Senior Notes, due 2015 [Member]	Feb. 17, 2012 Senior Notes, due 2015 [Member]	Dec. 31, 2011 Senior Notes, due 2015 [Member]	Feb. 29, 2012 2019 Senior Notes, due 2019 [Member]	Jun. 30, 2013 2019 Senior Notes, due 2019 [Member]	Dec. 31, 2012 2019 Senior Notes, due 2019 [Member]
Debt Instrument [Line Items]
Long-term Debt, stated interest rate					11.50%	12.25%	11.00%							8.50%
Debt, short-term and long-term									$ 0	$ 0		$ 129.0		$ 1,305.0	$ 1,305.0
Proceeds from Issuance of long-term Debt			1,346.6	135.7									130.0
Net loss on extinguishments of long-term debt	10.3	0	14.2	9.4				9.4
Write off of unamortized deferred financing costs								1.5
Extinguishment of Debt, Fees Paid to Lenders											$ 7.9