Financial Instruments (Effect Of Derivative Instruments On Consolidated Financial Statements) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative Instruments, Gain (Loss)
Foreign exchange contracts, Gain (Loss) Recognized in OCL	$ (2.0)	$ (13.2)	$ 10.8	$ (2.1)
Foreign exchange contracts, Gain Reclassified from AOCL to Income	$ (5.3)	$ (4.6)	$ (18.1)	$ (18.0)