Significant Accounting Policies (Intangible Assets Amortization Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Finite-Lived Intangible Assets, Net [Abstract]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		13 years 8 months
Amortization of Intangible Assets	$ 12.4	$ 24.4
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2014 (remaining)	10.7	10.7
2015	43.0	43.0
2016	43.0	43.0
2017	43.0	43.0
2018	42.6	42.6
Thereafter	340.4	340.4
Total	$ 522.7	$ 522.7