Property And Equipment, Net (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Property And Equipment, Net [Abstract]
Depreciation expense	$ 66.4	$ 72.8	$ 202.8	$ 224.9
Non-cash capital expenditures			$ 6.0		$ 9.5