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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	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
ASSETS:
Equity Method Investments, Fair Value Disclosure	$ 0	$ 72.5
Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]
ASSETS:
Equity Method Investments, Fair Value Disclosure	0	0
Significant Other Observable Inputs (Level 2) [Member]
ASSETS:
Equity Method Investments, Fair Value Disclosure	0	0
Significant Unobservable Inputs (Level 3) [Member]
ASSETS:
Equity Method Investments, Fair Value Disclosure	0	72.5
Equity Method Investments [Member]
ASSETS:
Equity Method Investment, Other than Temporary Impairment	$ 67.6	$ 365.4

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents investments accounted for under the equity method of accounting as of the balance sheet date.

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