Derivative Instruments and Hedging Activities (Schedule Of Fair Value Of Outstanding Derivatives) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Interest rate contracts | Other current liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 45.5	$ 19.5
Interest rate contracts | Other assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		0.0
Interest rate contracts | Other liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	69.6	41.9
Interest rate contracts | Prepaid expenses and other current assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		0.0
Foreign exchange forward contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	43.5	30.5
Liability Derivatives, Fair Value	139.7	89.1
Foreign exchange forward contracts | Other current liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	3.6	6.2
Foreign exchange forward contracts | Other assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	0.0	0.6
Foreign exchange forward contracts | Other liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	0.4	1.1
Foreign exchange forward contracts | Prepaid expenses and other current assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	14.6	12.7
Foreign exchange forward contracts | Other current liabilities | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	20.6	20.4
Foreign exchange forward contracts | Prepaid expenses and other current assets | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	28.9	$ 17.2
Interest rate contracts | Level 2 | Other assets
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Assets, at Fair Value	0.0
Interest rate contracts | Level 2 | Prepaid expenses and other current assets
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Assets, at Fair Value	$ 0.0