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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, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Derivative, notional amount | $ 217.7 | $ 479.9 |
Accrued liabilities |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value | 0.3 |  |
Other accounts receivable |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Fair value of foreign currency forward contracts, assets |  | 0.6 |
Other income (expenses), net |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Recognized gains (losses) of foreign currency forward contracts | (38.5) | (17.8) | $ (1.1)
Other, net |  |  |
Fair Value, Option, Quantitative Disclosures [Line Items] |  |  |
Change in the fair value of foreign currency forward contracts | 38.5 | 17.8 | 1.1
Cash settlements | $ (37.6) | $ (18.3) | $ (1.8)

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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=56946850&loc=SL5624171-113959 + Details
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- Definition Fair value as of the balance sheet date of all foreign currency derivative assets 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=56946850&loc=SL5624163-113959 + Details
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