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STOCK-BASED COMPENSATION (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation expense	$ 2.2	$ 1.9	$ 6.0	$ 6.7
Mark-to-market adjustments	0.5	(2.0)	1.0	(1.2)
Total expense (income)	$ 2.7	$ (0.1)	$ 7.0	$ 5.5

Equity-based compensation cost during the period with respect to the award, which will be recognized in income (as well as the total recognized tax benefit) or capitalized as part of the cost of an asset.

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