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PROPERTY, PLANT AND EQUIPMENT, NET
12 Months Ended
Dec. 31, 2013
PROPERTY, PLANT AND EQUIPMENT, NET  
PROPERTY, PLANT AND EQUIPMENT, NET

5. PROPERTY, PLANT AND EQUIPMENT, NET

As of December 31, 2013 and 2012, property, plant and equipment consisted of the following:

 
  December 31,  
(In millions)
  2013   2012  

Machinery and equipment

  $ 2,311.9   $ 1,492.6  

Buildings

    219.9     203.7  

Depletable land and land improvements

    292.2     90.4  

Construction-in-progress

    134.7     33.6  
           

Property, plant and equipment, at cost

    2,958.7     1,820.3  

Less: accumulated depreciation

    1,300.0     1,182.6  
           

Property, plant and equipment, net

  $ 1,658.7   $ 637.7