Derivative Financial Instruments (Location of gain (loss) recognized in income related to hedges and derivatives) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Revenues	$ 3,335.7	$ 3,335.1	$ 9,624.5	$ 9,682.3
Selling, General and Administrative Expense	(252.0)	(298.1)	(780.8)	(919.7)
Other income (expense), net	28.9	(57.7)	(9.3)	(156.5)
Foreign exchange contracts | Sales [Member]
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(0.1)	(0.1)	(0.8)	(1.2)
Total gain (loss) recognized in income associated with hedges and derivatives	(20.4)	(0.6)	(52.1)	(15.3)
Foreign exchange contracts | Cost of Sales [Member]
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	1.4	0.1	2.7
Total gain (loss) recognized in income associated with hedges and derivatives	16.5	(1.2)	42.7	1.4
Foreign exchange contracts | Selling, General and Administrative Expenses [Member]
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Total gain (loss) recognized in income associated with hedges and derivatives	0.1	0.0	(0.4)	0.1
Foreign exchange contracts | Other Nonoperating Income (Expense) [Member]
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	4.6	(19.4)	(24.4)	(14.4)
Total gain (loss) recognized in income associated with hedges and derivatives	15.7	(4.7)	(6.0)	(23.2)
Foreign exchange contracts | Cash Flow Hedging | Sales [Member]
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net	3.5	2.6	6.0	1.5
Total cash flow hedge gain (loss) recognized in income	(20.3)	(0.5)	(51.3)	(14.1)
Total hedge gain (loss) recognized in income	(20.3)	(0.5)	(51.3)	(14.1)
Foreign exchange contracts | Cash Flow Hedging | Cost of Sales [Member]
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net	(3.2)	(2.9)	(8.0)	(5.1)
Total cash flow hedge gain (loss) recognized in income	15.1	(1.3)	40.0	1.4
Total hedge gain (loss) recognized in income	15.1	(1.3)	40.0	1.4
Foreign exchange contracts | Cash Flow Hedging | Selling, General and Administrative Expenses [Member]
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net	0.1
Total cash flow hedge gain (loss) recognized in income	0.1	0.0	(0.4)	0.1
Total hedge gain (loss) recognized in income	0.1		(0.4)	0.1
Foreign exchange contracts | Cash Flow Hedging | Other Nonoperating Income (Expense) [Member]
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Gain (Loss) from Components Excluded from Assessment of Cash Flow Hedge Effectiveness, Net	13.1	(8.6)	21.6	(30.7)
Total cash flow hedge gain (loss) recognized in income	11.1	14.7	18.4	(8.8)
Total hedge gain (loss) recognized in income	11.1	14.7	18.4	(8.8)
Foreign exchange contracts | Cash Flow Hedging | Amount Reclassified out of Accumulated Other Comprehensive Loss | Hedging
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Revenues	(23.8)	(3.1)	(57.3)	(15.6)
Cost of Revenue	18.3	1.6	48.0	6.5
Selling, General and Administrative Expense		0.0	(0.4)	0.1
Other income (expense), net	$ (2.0)	$ 23.3	$ (3.2)	$ 21.9