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Derivative Instruments and Hedging Activities (Fair Value Of Derivative Instruments) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Derivative [Line Items]
Derivative asset, fair value	$ 50.9		$ 50.9		$ 24.7
Derivative liability, fair value	5.2		5.2		6.6
Foreign currency contracts \| Designated as Hedging Instrument \| Other current assets
Derivative [Line Items]
Derivative asset, fair value	0.9		0.9		1.9
Foreign currency contracts \| Designated as Hedging Instrument \| Other current liabilities
Derivative [Line Items]
Derivative liability, fair value	0.3		0.3		0.4
Foreign currency contracts \| Not Designated as Hedging Instrument \| Other current assets
Derivative [Line Items]
Derivative asset, fair value	15.5		15.5		5.1
Foreign currency contracts \| Not Designated as Hedging Instrument \| Other current liabilities
Derivative [Line Items]
Derivative liability, fair value	4.9		4.9		6.2
Cross currency swap contract \| Designated as Hedging Instrument \| Other noncurrent assets
Derivative [Line Items]
Derivative asset, fair value	34.5		34.5		17.7
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	$ 25.6	$ (0.8)	$ 31.3	$ 1.6