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Derivative Instruments and Hedging Activities (Fair Value Of Derivative Instruments) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Derivative [Line Items]
Derivative asset, fair value	$ 56.7		$ 56.7		$ 39.3
Derivative liability, fair value	17.1		17.1		15.0
Foreign currency contracts \| Designated as Hedging Instrument \| Other current assets
Derivative [Line Items]
Derivative asset, fair value	4.6		4.6		0.6
Foreign currency contracts \| Designated as Hedging Instrument \| Other current liabilities
Derivative [Line Items]
Derivative liability, fair value	0.1		0.1		1.9
Foreign currency contracts \| Not Designated as Hedging Instrument \| Other current assets
Derivative [Line Items]
Derivative asset, fair value	23.7		23.7		11.7
Foreign currency contracts \| Not Designated as Hedging Instrument \| Other current liabilities
Derivative [Line Items]
Derivative liability, fair value	17.0		17.0		13.1
Cross currency swap contract \| Designated as Hedging Instrument \| Other noncurrent assets
Derivative [Line Items]
Derivative asset, fair value	28.4		28.4		27.0
Cross currency swap contract \| Designated as Hedging Instrument \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liability, fair value	0.0		0.0		$ 0.0
Other expense, net \| Foreign currency contracts \| Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative instruments not designated as hedging instruments, gain (loss), net	$ (9.0)	$ (3.1)	$ 23.1	$ 5.7