Financial Instruments and Risk Management (Effect of Derivative Instruments on the Condensed Consolidated Statements of Comprehensive Earnings Derivatives in Net Investment Hedging Relationships (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Gains and Losses on Derivatives | Net Investment Hedging | Foreign currency borrowings and forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	$ (44.9)	$ (34.5)	$ (4.8)	$ 20.7