Long-Term Debt Senior Subordinated Notes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Debt Instrument [Line Items]
Debt, short-term and long-term	$ 3,268.3		$ 3,268.3		$ 3,177.0
Net loss on extinguishments of long-term debt	$ 0.0	$ 45.8	$ 24.3	$ 53.8