Significant Accounting Policies (Intangible Assets Amortization Expense) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 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	$ 12.0	$ 13.7
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]
2014 (remaining)	21.5	21.5
2015	43.0	43.0
2016	43.0	43.0
2017	43.0	43.0
2018	42.7	42.7
Thereafter	340.2	340.2
Total	$ 533.4	$ 533.4