Derivative Instruments (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Aggregate notional amount	$ 1,103.0	$ 1,302.3
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Aggregate notional amount	721.0	365.2
Foreign Exchange Contract \| Other current assets \| Designated as Hedging Instrument
Summary of derivatives designated as hedging instruments
Asset derivatives	16.6	69.5
Foreign Exchange Contract \| Other current assets \| Not Designated as Hedging Instrument
Summary of derivatives designated as hedging instruments
Asset derivatives	10.3	1.3
Foreign Exchange Contract \| Investments and other assets \| Designated as Hedging Instrument
Summary of derivatives designated as hedging instruments
Asset derivatives	0.3	1.9
Foreign Exchange Contract \| Accrued expenses and other \| Designated as Hedging Instrument
Summary of derivatives designated as hedging instruments
Liability derivatives	10.2
Foreign Exchange Contract \| Accrued expenses and other \| Not Designated as Hedging Instrument
Summary of derivatives designated as hedging instruments
Liability derivatives	2.0	5.4
Foreign Exchange Contract \| Other long-term liabilities \| Designated as Hedging Instrument
Summary of derivatives designated as hedging instruments
Liability derivatives	2.5
Euro \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Aggregate notional amount	945.5	1,174.6
Swiss francs \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Aggregate notional amount	80.8	0.0
Canadian dollar \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Aggregate notional amount	76.7	56.7
British pound sterling \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Aggregate notional amount	0.0	34.5
Australian dollar \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Aggregate notional amount	0.0	19.9
Japanese yen \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Aggregate notional amount	$ 0.0	$ 16.6

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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- References

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+ 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=51824906&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=56946850&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719

Reference 2: 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=51824906&loc=SL20225862-175312

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
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-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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