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Accrued Liabilities
 9 Months Ended
Sep. 30, 2015
Accrued Liabilities [Abstract]  
Accrued Liabilities
Accrued Liabilities

The components of accrued liabilities were as follows (dollars in millions):
 
September 30,
2015
 
December 31,
2014
Compensation and benefits
$
109.9

 
$
130.8

Medical insurance and workers’ compensation
31.0

 
27.0

Franchise, property, and sales and use taxes
23.3

 
17.5

Customer volume discounts and rebates
14.6

 
13.9

Environmental liabilities and asset retirement obligations
9.1

 
7.1

Severance, retention, and relocation
9.5

 
8.3

Other
11.6

 
15.4

Total
$
209.0

 
$
220.0