Derivative Instruments And Hedging Activities (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2017	Jun. 30, 2017
Derivative [Line Items]
Notional amount of foreign currency hedging contracts held	$ 789.3	$ 568.2
Foreign Currency Hedging Instruments [Member]
Derivative [Line Items]
Terms of foreign currency hedging contracts, maximum	3 years
Maturity date	Dec. 31, 2019