Derivative Instruments Narrative (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Cash flow Hedges [Member] \| Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Derivative [Line Items]
Amount of gain recognized in other comprehensive income (effective portion)	$ 15.8
Cash flow Hedges [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, notional amount	406.6	$ 321.5
Balance sheet hedges [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative, notional amount	$ 232.7	$ 239.9

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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- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994

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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

No definition available.

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