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Financial Instruments and Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2018
Fair Value Disclosures [Abstract] |
Fair Value by Balance Sheet Location | The following table summarizes the fair value of the company’s foreign exchange forward contracts as of March 31, 2018 and December 31, 2017.
|  | March 31, 2018 |  | December 31, 2017
Balance Sheet Location |  |  |  |
Prepaid expenses and other current assets |  | $ | 1.1 |  |  | $ | 4.9 |
Other accrued liabilities |  | 1.1 |  |  | 1.6 |
Total fair value |  | $ | — |  |  | $ | 3.3 |
Gains and Losses Recognized on Foreign Exchange Forward Contracts | The following table summarizes the location and amount of gains and losses recognized on foreign exchange forward contracts for the three months ended March 31, 2018 and 2017.
| Three months ended March 31,
| 2018 |  | 2017
Statement of Income Location |  |  |
Other income (expense), net | $ | 10.7 |  |  | $ | 5.7 |
Fair Values of Other Financial Instruments Not Measured at Fair Value in Consolidated Balance Sheets | Financial assets with carrying values approximating fair value include cash and cash equivalents and accounts receivable. Financial liabilities with carrying values approximating fair value include accounts payable and other accrued liabilities. The carrying amounts of these financial assets and liabilities approximate fair value due to their short maturities. Such financial instruments are not included in the following table that provides information about the estimated fair values of other financial instruments that are not measured at fair value in the consolidated balance sheets as of March 31, 2018 and December 31, 2017.
| March 31, 2018 |  | December 31, 2017
| Carrying Amount |  | Fair Value |  | Carrying Amount |  | Fair Value
Long-term debt: |  |  |  |  |  |  |
10.75% senior secured notes due 2022 | $ | 430.2 |  |  | $ | 495.0 |  |  | $ | 429.6 |  |  | $ | 492.8 |
5.50% convertible senior notes due 2021 | $ | 188.2 |  |  | $ | 279.9 |  |  | $ | 186.3 |  |  | $ | 237.9 |

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- Definition Fair Value Measurements Estimated Fair Value of Financial Instruments Not Measured at Fair Value [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified 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 -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 + Details
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