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ENVIRONMENTAL (Details) (USD $)
In Millions
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Dec. 31, 2010
ENVIRONMENTAL [Abstract]          
Reserves for future environmental expenditures-total $ 168.0 $ 165.8 $ 168.0 $ 165.8 $ 167.6
Reserves for environmental expenditures-noncurrent 140.0 141.8 140.0 141.8 139.6
Environment provisions charged (credited) to income [Abstract]          
Charges to income 7.9 5.5 9.9 6.1  
Recoveries from third parties of costs incurred and expensed in prior periods (9.0) (2.8) (9.5) (5.4)  
Total environmental expense (income) $ (1.1) $ 2.7 $ 0.4 $ 0.7