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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2013
Fair Value Measurements [Abstract] |
Carrying amount and fair values of the Company's assets and liabilities measured on a recurring basis |
|  | March 31, 2013 |  |  | December 31, 2012 |
(in millions) |  | Carrying Amount |  |  | Fair Value |  |  | Carrying Amount |  |  | Fair Value |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 43.2 |  |  | $ | 43.2 |  |  | $ | 22.4 |  |  | $ | 22.4 |
Short-term investments |  |  | 5.0 |  |  |  | 5.0 |  |  |  | 5.1 |  |  |  | 5.1 |
Non-financial assets (Level 3 measurement): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill—Octane Additives |  |  | 0.9 |  |  |  | 0.9 |  |  |  | 1.3 |  |  |  | 1.3 |
Derivatives (Level 1 measurement): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other non-current assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commodity swaps |  |  | 0.0 |  |  |  | 0.0 |  |  |  | 0.1 |  |  |  | 0.1 |
Foreign currency forward exchange contracts |  |  | 0.0 |  |  |  | 0.0 |  |  |  | 0.8 |  |  |  | 0.8 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-derivatives: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt (including current portion) |  |  | 37.0 |  |  |  | 37.0 |  |  |  | 30.0 |  |  |  | 30.0 |
Non-financial liabilities (Level 3 measurement): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock equivalent units |  |  | 12.0 |  |  |  | 12.0 |  |  |  | 12.6 |  |  |  | 12.6 |
Acquisition-related contingent consideration |  |  | 4.4 |  |  |  | 4.4 |  |  |  | 4.3 |  |  |  | 4.3 |
Derivatives (Level 1 measurement): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other non-current liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency forward exchange contracts |  | $ | 1.2 |  |  | $ | 1.2 |  |  | $ | 0.0 |  |  | $ | 0.0 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19190-110258 + Details
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