Long-Term Debt Deferred Financing Costs (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Deferred Financing Costs [Roll Forward]
Deferred financing costs, net	$ 30.1	$ 53.2
Increase in Deferred Finance Costs	21.9	6.1
Amortization of Financing Costs	6.4	9.1
Write off of Deferred Debt Issuance Cost	(12.6)	(20.1)
Deferred financing costs, net	$ 33.0	$ 30.1
Weighted Average Remaining Life, Deferred Finance Costs	6 years 7 months 9 days	4 years 11 months 7 days