Derivative Financial Instruments (Derivative Instruments In Cash Flow Hedging Relationships Gain (Loss)) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Derivative Instruments, Gain (Loss)
Revenue	$ 3,125.2	$ 3,388.0
Selling, general and administrative expense	(303.1)	(254.1)
Research and development expense	41.1	43.4
Other income (expense), net	(25.2)	63.5
Income before income taxes	140.7	36.6
Foreign exchange contracts
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Income on Derivatives (Instruments Not Designated as Hedging Instruments)	(13.0)	27.8
Foreign exchange contracts \| Revenue
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Income on Derivatives (Instruments Not Designated as Hedging Instruments)	0.3	0.3
Foreign exchange contracts \| Cost of sales
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Income on Derivatives (Instruments Not Designated as Hedging Instruments)	0.1	(0.5)
Foreign exchange contracts \| Other income (expense), net
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Income on Derivatives (Instruments Not Designated as Hedging Instruments)	(13.4)	28.0
Cash Flow Hedging \| Foreign exchange contracts
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Income (Ineffective Portion and Amount Excluded from Effectiveness Testing)	1.9	(2.5)
Cash Flow Hedging \| Foreign exchange contracts \| Revenue
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Income (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0.5	1.8
Cash Flow Hedging \| Foreign exchange contracts \| Cost of sales
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Income (Ineffective Portion and Amount Excluded from Effectiveness Testing)	(1.1)	(1.2)
Cash Flow Hedging \| Foreign exchange contracts \| Other income (expense), net
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Income (Ineffective Portion and Amount Excluded from Effectiveness Testing)	2.5	(3.1)
Amount Reclassified out of Accumulated Other Comprehensive Loss
Derivative Instruments, Gain (Loss)
Income before income taxes	0.0	(0.7)
Hedging \| Amount Reclassified out of Accumulated Other Comprehensive Loss \| Foreign exchange contracts
Derivative Instruments, Gain (Loss)
Revenue	2.5	(14.6)
Cost of sales	1.6	(0.1)
Selling, general and administrative expense	0.1	0.0
Research and development expense	0.0	0.1
Other income (expense), net	(4.6)	(28.4)
Hedging \| Amount Reclassified out of Accumulated Other Comprehensive Loss \| Cash Flow Hedging \| Foreign exchange contracts
Derivative Instruments, Gain (Loss)
Income before income taxes	$ (0.4)	$ (43.2)

The aggregate cost of goods produced and sold and services rendered during the reporting period.

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount of income (expense) related to nonoperating activities, classified as other.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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