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PROPERTY, PLANT AND EQUIPMENT, NET (Details) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Property, plant and equipment    
Property, plant and equipment, at cost $ 3,043.2 $ 2,958.7
Less: accumulated depreciation 1,382.5 1,300.0
Property, plant and equipment, net 1,660.7 1,658.7
Chemical manufacturing plants
   
Property, plant and equipment    
Property, plant and equipment, at cost 1,407.5 1,361.7
Machinery and equipment
   
Property, plant and equipment    
Property, plant and equipment, at cost 1,145.0 1,070.4
Buildings
   
Property, plant and equipment    
Property, plant and equipment, at cost 205.1 214.4
Land and land improvements
   
Property, plant and equipment    
Property, plant and equipment, at cost 175.7 195.3
Construction-in-progress
   
Property, plant and equipment    
Property, plant and equipment, at cost $ 109.9 $ 116.9