Derivative Financial Instruments (Location of gain (loss) recognized in income related to hedges and derivatives) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Revenues	$ 3,434.2	$ 2,960.9	$ 6,347.2	$ 6,086.1
Selling, general and administrative expense	(323.8)	(281.4)	(621.6)	(584.5)
Other income (expense), net	(72.6)	2.2	(98.8)	(23.0)
Sales [Member] | Foreign exchange contracts
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)	(1.2)	(1.1)	(0.9)
Total gain (loss) recognized in income associated with hedges and derivatives	(14.1)	0.2	(14.7)	3.5
Cost of Sales [Member] | Foreign exchange contracts
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	(0.1)	0.2
Total gain (loss) recognized in income associated with hedges and derivatives	4.1	2.7	2.6	3.3
Selling, General and Administrative Expenses [Member] | Foreign exchange contracts
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	0.0	0.0	0.0	0.0
Total gain (loss) recognized in income associated with hedges and derivatives	0.0	(0.1)	0.1	0.0
Other Nonoperating Income (Expense) [Member] | Foreign exchange contracts
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	8.3	11.8	5.0	(1.6)
Total gain (loss) recognized in income associated with hedges and derivatives	(3.2)	12.4	(18.5)	(3.1)
Cash Flow Hedging | Sales [Member] | Foreign exchange contracts
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	(0.8)	0.3	(1.1)	0.8
Total cash flow hedge gain (loss) recognized in income	(14.0)	1.4	(13.6)	4.4
Cash Flow Hedging | Cost of Sales [Member] | Foreign exchange contracts
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	1.9	(0.9)	(2.2)	(2.0)
Total cash flow hedge gain (loss) recognized in income	4.2	2.6	2.7	3.1
Cash Flow Hedging | Selling, General and Administrative Expenses [Member] | Foreign exchange contracts
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	0.0	0.0	0.0	0.0
Total cash flow hedge gain (loss) recognized in income	0.0	(0.1)	0.1	0.0
Cash Flow Hedging | Other Nonoperating Income (Expense) [Member] | Foreign exchange contracts
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	(12.5)	0.7	(22.1)	3.2
Total cash flow hedge gain (loss) recognized in income	(11.5)	0.6	(23.5)	(1.5)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Amount Reclassified out of Accumulated Other Comprehensive Loss | Cash Flow Hedging | Foreign exchange contracts
Location of gain (loss) recognized in income related to hedges and derivatives [Line Items]
Revenues	(13.2)	1.1	(12.5)	3.6
Cost of Revenue	2.3	3.5	4.9	5.1
Selling, general and administrative expense	0.0	(0.1)	0.1	0.0
Other income (expense), net	$ 1.0	$ (0.1)	$ (1.4)	$ (4.7)