Derivative Financial Instruments (Location And Amounts Of Pre-Tax Gains (Losses) On Cash Flow Hedge Derivatives Financial Instruments) (Details) - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Net (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (effective portion)	$ (2.5)	$ (13.7)
Cost Of Revenues [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (effective portion)	(2.1)	(11.2)
Selling, General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (effective portion)	(0.4)	(2.5)
Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Increase (decrease) in Derivative Gains (Losses) Recognized in Accumulated Other Comprehensive Income (Loss) (effective portion)	$ 22.0	$ 34.7