DEBT AND CREDIT FACILITIES 3 (Details) (Flat Ridge II [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Schedule of Equity Method Investments [Line Items]
Proceeds from return of capital	$ 148
Liability for guarantee obligation associated with cash flow requirements	3
Term Loan, Due June 2023 [Member]
Schedule of Equity Method Investments [Line Items]
Long-term debt outstanding	242
Fixed Rate Note, Due June 2035 [Member]
Schedule of Equity Method Investments [Line Items]
Long-term debt outstanding	$ 110