Quarterly report pursuant to Section 13 or 15(d)

PROPERTY, PLANT AND EQUIPMENT (Narrative) (Details)

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PROPERTY, PLANT AND EQUIPMENT (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Construction in Progress [Member]
Dec. 31, 2013
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]            
Depreciation And Depletion $ 142.5 $ 138.9 $ 280.9 $ 274.9    
Accumulated amount of capitalized interest included within construction in progress         31.2 31.4
Interest costs capitalized during the period         $ 1.0 $ 17.4