Fair Value Measurements, Derivative Instruments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Derivatives Fair Value [Line Items]
Notional Amount Of Derivatives	$ 3,740.0invest_DerivativeNotionalAmount	$ 2,030.0invest_DerivativeNotionalAmount
Net Investment Hedge
Gain (Loss) in Cumulative Translation Adjustment on Net Investment Hedge	20.9
Interest Rate Swaps [Member] \| Other Expense [Member] \| Derivatives Designated as Fair Value Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized	4.2	0.2
Ineffective Portion of Gain (Loss) Recognized	0.9	(1.4)
Interest Rate Swaps [Member] \| Derivatives Designated as Hedging Instruments \| Other Long-term Liabilities [Member]
Fair Value - Liabilities
Derivative Liability, Fair Value	3.7	5.2
Foreign Currency Exchange Contracts [Member] \| Cost of Revenues [Member] \| Derivatives Not Designated as Fair Value Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized	14.7	2.7
Foreign Currency Exchange Contracts [Member] \| Other Expense [Member] \| Derivatives Not Designated as Fair Value Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized	129.9	(22.1)
Foreign Currency Exchange Contracts [Member] \| Derivatives Not Designated as Fair Value Hedges \| Other Current Assets [Member]
Fair Value - Assets
Derivative Asset, Fair Value	20.2	3.8
Foreign Currency Exchange Contracts [Member] \| Derivatives Not Designated as Fair Value Hedges \| Accrued Expense [Member]
Fair Value - Liabilities
Derivative Liability, Fair Value	$ 6.7	$ 1.3

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 20

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4B

-Subparagraph (a),(c)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 210

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-Section 55

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (d)

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-SubTopic 25

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Current period adjustment in other comprehensive income reflecting gains or losses on foreign currency transactions that are designated as, and are effective as, hedges of a net investment in a foreign entity, net of tax effect.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 30

-Section 45

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