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STOCK-BASED COMPENSATION (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Allocated Share-based Compensation Expense	$ 3.5	$ 1.9	$ 6.2	$ 3.8
Mark-to-market adjustments	(0.5)	(0.4)	1.3	0.5
Total expense	$ 3.0	$ 1.5	$ 7.5	$ 4.3

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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