Quarterly report pursuant to Section 13 or 15(d)

DISCONTINUED OPERATIONS (Details)

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DISCONTINUED OPERATIONS (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Sonoma [Member]
Mar. 31, 2012
Sonoma [Member]
Jul. 10, 2012
Asia Pacific Coal [Member]
Sonoma [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Percentage Of Ownership Interests         45.00%
Statements of Consolidated Operations          
REVENUES FROM PRODUCT SALES AND SERVICES     $ 0 $ 52.4  
INCOME FROM DISCONTINUED OPERATIONS, net of tax 0 5.5 0 5.5  
Tax effect of discontinued operation, tax expense (benefit)       $ 2.4