Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details)

v2.4.0.8
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Related Party Transaction [Line Items]        
Current Fiscal Year End Date     --12-31  
Black Label And Black Thor Chromite Deposits [Member]
       
Related Party Transaction [Line Items]        
Ownership Interest 100.00%   100.00%  
Big Daddy Chromite Deposit [Member]
       
Related Party Transaction [Line Items]        
Ownership Interest 70.00%   70.00%  
Transaction Gains and Losses Resulting from Remeasurement [Member]
       
Related Party Transaction [Line Items]        
Foreign Currency Transaction Gain (Loss), before Tax $ 26.4 $ (14.1) $ 8.4 $ 36.5
Short-term intercompany loan [Member]
       
Related Party Transaction [Line Items]        
Foreign Currency Transaction Gain (Loss), before Tax 17.7 (4.5) 4.7 23.8
Cash and Cash Equivalents [Member]
       
Related Party Transaction [Line Items]        
Foreign Currency Transaction Gain (Loss), before Tax $ 9.6 $ (4.3) $ 4.5 $ 7.4