Property And Equipment (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Property And Equipment [Abstract]
Lease Obligation Period			5 years
Amortization of assets held under capital leases	$ 10.2	$ 9.5	$ 31.4	$ 26.8