Financial Instruments and Risk Management Financial Instruments and Risk Management (Effect Of Derivative Instruments on the Condensed Consolidated Statements of Comprehensive Earnings Derivatives in Cash Flow Hedging Relationships) (Details) (Details) - Cash Flow Hedging - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivative [Line Items]
Amount of Gain (Loss) Recognized in AOCE (Net of Tax) on Derivative	$ (15.1)	$ 14.8
Foreign currency forward contracts
Derivative [Line Items]
Amount of Gain (Loss) Recognized in AOCE (Net of Tax) on Derivative	(15.1)	14.1
Interest rate swaps
Derivative [Line Items]
Amount of Gain (Loss) Recognized in AOCE (Net of Tax) on Derivative	$ 0.0	$ 0.7