COMMITMENTS AND CONTINGENCIES (Details) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Other Commitments [Line Items]
Capital investment, future payments	$ (117,100,000)	$ 125,100,000
Bloom Lake [Member]
Other Commitments [Line Items]
Capital investment committed	1,300,000,000
Capital expenditures related to commitment	1,200,000,000
Capital investment, future payments	$ 104,000,000