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Fair Value Measurements (Details) (Recurring, USD $) In Millions, unless otherwise specified | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | ---
Level 1 |  |
Fair value measurements |  |
Cash equivalents | $ 81.0 | $ 134.0
Total Assets | 81.0 | 134.0
Total Liabilities | 0 | 0
Level 1 | Other derivative agreements |  |
Fair value measurements |  |
Other current assets | 0 |
Other long-term assets | 0 | 0
Other current liabilities | 0 | 0
Other long-term liabilities | 0 |
Level 1 | Interest rate swap |  |
Fair value measurements |  |
Other current liabilities | 0 | 0
Other long-term liabilities | 0 | 0
Level 1 | Biofuels blending obligation |  |
Fair value measurements |  |
Other current liabilities (biofuel blending obligation) | 0 | 0
Level 2 |  |
Fair value measurements |  |
Cash equivalents | 0 | 0
Total Assets | 1.0 | 0.9
Total Liabilities | (35.2) | (71.6)
Level 2 | Other derivative agreements |  |
Fair value measurements |  |
Other current assets | 0.9 |
Other long-term assets | 0.1 | 0.9
Other current liabilities | (15.3) | (67.7)
Other long-term liabilities | (1.8) |
Level 2 | Interest rate swap |  |
Fair value measurements |  |
Other current liabilities | (0.9) | (0.9)
Other long-term liabilities | (1.0) | (1.9)
Level 2 | Biofuels blending obligation |  |
Fair value measurements |  |
Other current liabilities (biofuel blending obligation) | (16.2) | (1.1)
Level 3 |  |
Fair value measurements |  |
Cash equivalents | 0 | 0
Total Assets | 0 | 0
Total Liabilities | 0 | 0
Level 3 | Other derivative agreements |  |
Fair value measurements |  |
Other current assets | 0 |
Other long-term assets | 0 | 0
Other current liabilities | 0 | 0
Other long-term liabilities | 0 |
Level 3 | Interest rate swap |  |
Fair value measurements |  |
Other current liabilities | 0 | 0
Other long-term liabilities | 0 | 0
Level 3 | Biofuels blending obligation |  |
Fair value measurements |  |
Other current liabilities (biofuel blending obligation) | 0 | 0
Total |  |
Fair value measurements |  |
Cash equivalents | 81.0 | 134.0
Total Assets | 82.0 | 134.9
Total Liabilities | (35.2) | (71.6)
Total | Other derivative agreements |  |
Fair value measurements |  |
Other current assets | 0.9 |
Other long-term assets | 0.1 | 0.9
Other current liabilities | (15.3) | (67.7)
Other long-term liabilities | (1.8) |
Total | Interest rate swap |  |
Fair value measurements |  |
Other current liabilities | (0.9) | (0.9)
Other long-term liabilities | (1.0) | (1.9)
Total | Biofuels blending obligation |  |
Fair value measurements |  |
Other current liabilities (biofuel blending obligation) | $ (16.2) | $ (1.1)

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