Derivative Instruments and Hedging Activities (Schedule Of Other Comprehensive Income And Earnings From Foreign Exchange Contracts) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Total revenues	$ 1,588.7	$ 1,263.1	$ 4,478.1	$ 3,606.8
Interest expense	(27.6)	(17.9)	(77.0)	(56.1)
Foreign exchange forward contracts | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(22.9)	30.5	(3.0)	40.8
Foreign exchange forward contracts | Sales | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	(4.0)	8.6	12.2	21.0
Interest rate contracts | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	0.1	(7.1)	(52.6)	(45.9)
Interest rate contracts | Interest Expense | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	(8.8)	2.6	(20.1)	9.6
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) from Hedging Activities
Derivative Instruments, Gain (Loss) [Line Items]
Total revenues	(5.0)	11.0	15.9	27.1
Interest expense	11.3	(3.4)	25.9	(12.5)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) from Hedging Activities | Foreign exchange forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total revenues	(5.0)	11.0	15.9	27.1
Interest expense	0.0	0.0	0.0	0.0
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains (Losses) from Hedging Activities | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total revenues	0.0	0.0	0.0	0.0
Interest expense	$ 11.3	$ (3.4)	$ 25.9	$ (12.5)