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Accrued Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2016
Accrued Liabilities [Abstract] |
Components of Accrued Liabilities | The components of accrued liabilities were as follows (dollars in millions):
| June 30, 2016 |  | December 31, 2015
Compensation and benefits | $ | 88.7 |  |  | $ | 106.4 |
Medical insurance and workers’ compensation | 30.1 |  |  | 31.1 |
Franchise, property, and sales and use taxes | 17.7 |  |  | 16.0 |
Customer volume discounts and rebates | 16.4 |  |  | 15.3 |
Environmental liabilities and asset retirement obligations | 7.4 |  |  | 7.9 |
Severance, retention, and relocation | 2.7 |  |  | 7.3 |
Other | 7.2 |  |  | 9.5 |
Total | $ | 170.2 |  |  | $ | 193.5 |

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