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 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 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 $ (11.4) $ 47.0 $ (18.1) $ 50.5
Short-term intercompany loan [Member]
       
Related Party Transaction [Line Items]        
Foreign Currency Transaction Gain (Loss), before Tax (4.2) 28.7 (13.0) 28.2
Cash and Cash Equivalents [Member]
       
Related Party Transaction [Line Items]        
Foreign Currency Transaction Gain (Loss), before Tax $ (2.0) $ 12.2 $ (5.1) $ 11.9