Derivative Financial Instruments (Fair Value Of Derivative Instruments In Balance Sheets) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Derivatives, Fair Value
Derivative assets	$ 279.1		$ 279.1		$ 141.4
Derivative liabilities	375.7		375.7		194.0
Long-term - Derivative financial instruments - Synthetic Bonds - Call Option Premium | Long Term Derivative Financial Instruments
Derivatives, Fair Value
Derivative assets	0.1		0.1		4.3
Long-term - Derivative financial instruments - Synthetic Bonds - Embedded Derivatives | Long Term Derivative Financial Instruments
Derivatives, Fair Value
Derivative liabilities	0.1		0.1		4.3
Derivatives Designated As Hedging Instruments | Foreign exchange contracts
Derivatives, Fair Value
Derivative assets	262.0		262.0		129.1
Derivative liabilities	365.3		365.3		173.0
Derivatives Designated As Hedging Instruments | Foreign exchange contracts | Current - Derivative Financial Instruments
Derivatives, Fair Value
Derivative assets	184.9		184.9		94.3
Derivative liabilities	298.3		298.3		125.0
Derivatives Designated As Hedging Instruments | Foreign exchange contracts | Long Term Derivative Financial Instruments
Derivatives, Fair Value
Derivative assets	77.1		77.1		34.8
Derivative liabilities	67.0		67.0		48.0
Derivatives Not Designated As Hedging Instruments | Foreign exchange contracts
Derivatives, Fair Value
Derivative assets	17.0		17.0		8.0
Derivative liabilities	10.3		10.3		16.7
Derivatives Not Designated As Hedging Instruments | Foreign exchange contracts | Current - Derivative Financial Instruments
Derivatives, Fair Value
Derivative assets	17.0		17.0		7.6
Derivative liabilities	10.2		10.2		16.3
Derivatives Not Designated As Hedging Instruments | Foreign exchange contracts | Long Term Derivative Financial Instruments
Derivatives, Fair Value
Derivative assets	0.0		0.0		0.4
Derivative liabilities	0.1		0.1		$ 0.4
Cash Flow Hedging | Foreign exchange contracts
Derivatives, Fair Value
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	41.7	$ (13.6)	(70.3)	$ 3.0
Selling, General and Administrative Expenses [Member] | Cash Flow Hedging | Foreign exchange contracts
Derivatives, Fair Value
Total hedge gain (loss) recognized in income	$ (0.5)		$ (0.5)	$ 0.1