Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

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COMMITMENTS AND CONTINGENCIES (Details) (Bloom Lake [Member], USD $)
3 Months Ended
Mar. 31, 2013
Bloom Lake [Member]
 
Related Party Transaction [Line Items]  
Capital investment committed $ 1,200,000,000
Capital expenditures related to commitment 889,000,000
Capital investment, future payments $ 311,000,000