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Fair Value of Financial Instruments Additional Information (Details) - Forward contracts - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 31, 2015
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |
Derivative, notional amount | $ 452.9 |  | $ 452.9 |  | $ 217.7
Accrued expenses |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |
Fair value foreign currency forward contracts, liabilities | 0.3 |  | 0.3 |  | $ 0.3
Other (expenses) income, net |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |
Recognized (losses) gains of foreign currency forward contracts | $ (10.7) | $ 3.8 | (4.9) | $ (16.6) |
Other, net |  |  |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |  |  |
Change in the fair value of foreign currency forward contracts |  |  | 4.9 | 16.6 |
Cash settlements |  |  | $ 4.8 | $ 15.7 |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References 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 + Details
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