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		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 12.8	$ 3.8	$ (30.0)	$ 19.3
Foreign currency forward contracts
Derivative [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ 12.8	$ 3.8	$ (30.0)	$ 19.3