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Property, Plant and Equipment, net (Tables)
 3 Months Ended
Mar. 31, 2014
Property, Plant and Equipment, Net  
Schedule of property, plant and equipment, net

 

 

 
   March 31,
2014		   December 31,
2013		  
 
   (in millions)
  

Land

   $ 1.6   $ 1.6  

Building and improvements

     8.1     8.1  

Plant and equipment

     377.8     375.6  

Construction in progress

     85.6     71.5  
           
​ ​ ​ ​ ​ ​ ​ ​

 

     473.1     456.8  

Less: Accumulated depreciation and amortization

     248.4     242.7  
           
​ ​ ​ ​ ​ ​ ​ ​

 

   $ 224.7   $ 214.1  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​
           

        
Summary of plant turnaround activity

 

 

 
   Three months
ended
March 31,		  
 
   2014   2013  
 
   (in millions)
  

Net capitalized turnaround costs:

              

Beginning balance

   $ 22.7   $ 2.6  

Additions

     0.3     —  

Depreciation

     (1.6 )   (1.0 )
           
​ ​ ​ ​ ​ ​ ​ ​

Ending balance

   $ 21.4   $ 1.6  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​