STOCK-BASED COMPENSATION (Details 2) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended					0 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Supplemental Employee Incentive Plan	Mar. 31, 2012 Supplemental Employee Incentive Plan	Mar. 31, 2013 Supplemental Employee Incentive Plan Interim trigger date occurs by June 30, 2014	Feb. 11, 2013 Supplemental Employee Incentive Plan Interim trigger date occurs by June 30, 2014 February 2013 Trigger Achievement
Stock-Based Compensation arrangements
Stock based compensation expense	$ 18.7	$ 1.7	$ 3.4	$ (1.7)
Interim goal price (in dollars per share)					$ 50
Distribution to be made to company's employees due to achievement of interim goal price of $50 per share						6.8
Percentage of total interim distribution paid in February						25.00%
Current distribution to be made to company's employees due to achievement of interim goal price of $50 per share						1.7
Percentage of total interim distribution deferred						75.00%
Deferred distribution to be made to company's employees due to achievement of interim goal price of $50 per share						$ 5.1