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		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivative [Line Items]
Amount of Gain (Loss) Recognized in AOCE (Net of Tax) on Derivative	$ (33.9)	$ (12.1)	$ (87.7)	$ 5.5
Foreign currency forward contracts
Derivative [Line Items]
Amount of Gain (Loss) Recognized in AOCE (Net of Tax) on Derivative	(33.9)	(8.8)	(87.7)	7.5
Interest rate swaps
Derivative [Line Items]
Amount of Gain (Loss) Recognized in AOCE (Net of Tax) on Derivative	$ 0.0	$ (3.3)	$ 0.0	$ (2.0)