Derivative Instruments and Hedging Activities (Schedule Of Fair Value Of Outstanding Derivatives) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 12.1	$ 30.5
Liability Derivatives, Fair Value	128.3	89.1
Interest rate contracts | Other current liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	45.6	19.5
Interest rate contracts | Other liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	57.6	41.9
Foreign exchange forward contracts
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	12.1	30.5
Liability Derivatives, Fair Value	128.3	89.1
Foreign exchange forward contracts | Other current liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	16.8	6.2
Foreign exchange forward contracts | Other assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	0.4	0.6
Foreign exchange forward contracts | Other liabilities | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	0.3	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	3.0	12.7
Foreign exchange forward contracts | Foreign exchange forward contracts | Other current liabilities | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	8.0	20.4
Foreign exchange forward contracts | Foreign exchange forward contracts | Prepaid expenses and other current assets | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	8.7	17.2
Interest rate contracts | Interest rate contracts | Other assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Assets, at Fair Value	0.0	0.0
Interest rate contracts | Interest rate contracts | Prepaid expenses and other current assets | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Interest Rate Derivative Assets, at Fair Value	$ 0.0	$ 0.0