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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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Derivative [Line Items]
Derivative asset, fair value	$ 31.5		$ 31.5		$ 24.7
Derivative liability, fair value	11.9		11.9		6.6
Foreign currency contracts \| Designated as Hedging Instrument \| Other current assets
Derivative [Line Items]
Derivative asset, fair value	2.2		2.2		1.9
Foreign currency contracts \| Designated as Hedging Instrument \| Other current liabilities
Derivative [Line Items]
Derivative liability, fair value	0.0		0.0		0.4
Foreign currency contracts \| Not Designated as Hedging Instrument \| Other current assets
Derivative [Line Items]
Derivative asset, fair value	6.8		6.8		5.1
Foreign currency contracts \| Not Designated as Hedging Instrument \| Other current liabilities
Derivative [Line Items]
Derivative liability, fair value	11.9		11.9		6.2
Interest rate swap contract \| Designated as Hedging Instrument \| Other noncurrent assets
Derivative [Line Items]
Derivative asset, fair value					17.7
Interest rate swap contract \| Designated as Hedging Instrument \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liability, fair value					$ 0.0
Cross currency swap contract \| Designated as Hedging Instrument \| Other noncurrent assets
Derivative [Line Items]
Derivative asset, fair value	22.5		22.5
Cross currency swap contract \| Designated as Hedging Instrument \| Other noncurrent liabilities
Derivative [Line Items]
Derivative liability, fair value	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	$ (3.1)	$ (3.8)	$ 5.7	$ 2.4