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Fair Value of Financial Instruments Fair Value of Financial Instruments - Additional Information (Details) - Forward Contracts - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Derivative, notional amount | $ 251.6 | $ 217.7 |
Accrued expenses |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Fair value foreign currency forward contracts, liabilities | 0.2 | 0.3 |
Other income (expenses), net |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Recognized gains (losses) of foreign currency forward contracts | 16.1 | (38.5) | $ (17.8)
Other, net |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Change in the fair value of foreign currency forward contracts | (16.1) | 38.5 | 17.8
Cash receipts (settlements) | $ 16.0 |  |
Cash receipts (settlements) |  | $ (37.6) | $ (18.3)

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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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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + 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 (e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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- Definition Fair value as of the balance sheet date of all foreign currency derivative liabilities not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959 + Details
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