Derivative Instruments And Hedging Activities (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure Derivative Instruments And Hedging Activities Narrative [Abstract]
Derivative, Notional Amount	$ 38.0	$ 216.0
Net cash outflow/inflow from settlement of derivative contracts	(13.6)	(16.0)	$ 4.9
Derivative Liability	$ 0.4	$ 2.5