Long-Term Debt -Senior Notes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Senior Notes, due 2015 [Member]	Mar. 19, 2012 Senior Notes, due 2015 [Member]	Mar. 05, 2012 Senior Notes, due 2015 [Member]	Feb. 17, 2012 Senior Notes, due 2015 [Member]	Dec. 31, 2011 Senior Notes, due 2015 [Member]	Jun. 30, 2012 2019 Senior Notes, due 2019 [Member]	Dec. 31, 2011 2019 Senior Notes, due 2019 [Member]	Jun. 30, 2012 Senior Exchange Notes due 2015 [Member] Senior Notes, due 2015 [Member]	Jun. 30, 2012 Senior PIK Exchange Notes due 2015 [Member] Senior Notes, due 2015 [Member]	Jun. 30, 2012 Senior PIK Interest Exchange Notes due 2015 [Member] Senior Notes, due 2015 [Member]
Debt Instrument [Line Items]
Long-term Debt, stated interest rate										8.50%		11.00%	11.50%	12.25%
Debt, short-term and long-term					$ 0				$ 129.0	$ 1,305.0	$ 1,175.0
Senior Notes, amount repurchased					129.0	8.3	0.1	120.6
2019 Senior Notes, amount issued										130.0
Debt extinguishment fees paid to lenders					7.9
Accrued interest paid to lenders					5.0
Net loss on extinguishments of long-term debt	0	115.7	9.4	118.9	9.4
Write off of unamortized deferred financing costs					$ 1.5