Property And Equipment (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Property Plant And Equipment [Abstract]
Lease Obligation Period			5 years
Amortization of assets held under capital leases	$ 8.8	$ 7.6	$ 17.3	$ 14.9