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Accrued Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2015
Accrued Liabilities [Abstract] |
Components of Accrued Liabilities | The components of accrued liabilities were as follows (dollars in millions):
| June 30, 2015 |  | December 31, 2014
Compensation and benefits | $ | 97.8 |  |  | $ | 130.8 |
Medical insurance and workers’ compensation | 30.2 |  |  | 27.0 |
Franchise, property, and sales and use taxes | 18.2 |  |  | 17.5 |
Customer volume discounts and rebates | 13.7 |  |  | 13.9 |
Environmental liabilities and asset retirement obligations | 8.8 |  |  | 7.1 |
Severance, retention, and relocation | 12.0 |  |  | 8.3 |
Other | 8.7 |  |  | 15.4 |
Total | $ | 189.4 |  |  | $ | 220.0 |

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