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Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE OF FINANCIAL INSTRUMENTS FAIR VALUE OF FINANCIAL INSTRUMENTS (Impairment Charges on Financial and Nonfinancial Assets) (Details)

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FAIR VALUE OF FINANCIAL INSTRUMENTS FAIR VALUE OF FINANCIAL INSTRUMENTS (Impairment Charges on Financial and Nonfinancial Assets) (Details) (Amapa [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
ASSETS: Ìý
Equity Method Investments, Fair Value Disclosure $ 72.5
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
Ìý
ASSETS: Ìý
Equity Method Investments, Fair Value Disclosure 0
Significant Other Observable Inputs (Level 2) [Member]
Ìý
ASSETS: Ìý
Equity Method Investments, Fair Value Disclosure 0
Significant Unobservable Inputs (Level 3) [Member]
Ìý
ASSETS: Ìý
Equity Method Investments, Fair Value Disclosure 72.5
Equity Method Investments [Member]
Ìý
ASSETS: Ìý
Impairment of equity method investment $ 365.4