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STOCK-BASED COMPENSATION (Details 2) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended |  | 0 Months Ended
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 Supplemental Employee Incentive Plan | Jun. 30, 2013 Supplemental Employee Incentive Plan | Jun. 30, 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 | $ 10.0 | $ 11.4 | $ 28.7 | $ 13.1 | $ 1.7 | $ 5.1 |  |
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

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