Debt Debt - Extinguishment (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 8 3/4% Senior Subordinated Notes due 2018 [Member]	Dec. 31, 2014 8 3/8% Senior Notes due 2020 [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount					$ 325.0	$ 22.7
Debt Instrument, Redemption Price, Percentage	104.375%
Loss on extinguishment of debt	$ 19.4	$ 0	$ 19.4	$ 0