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STOCK-BASED COMPENSATION (Details 2) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  | 0 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 SEIP III | Sep. 30, 2012 SEIP III | Sep. 30, 2013 SEIP III | Sep. 30, 2012 SEIP III | Feb. 11, 2013 SEIP III Interim trigger date occurs by June 30, 2014 | Feb. 11, 2013 SEIP III Interim trigger date occurs by June 30, 2014 February 2013 Trigger Achievement | Aug. 27, 2013 SEIP III Final trigger date occurs by June 30, 2016 | Sep. 19, 2013 SEIP IV | Sep. 30, 2013 SEIP IV Interim trigger date occurs by September 30, 2015 | Sep. 30, 2013 SEIP IV Final trigger date occurs by September 30, 2017
Stock-Based Compensation arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock based compensation expense | $ 12.2 | $ 10.4 | $ 41.0 | $ 23.4 | $ 4.1 | $ 1.6 | $ 9.2 | $ (0.1) |  |  |  |  |  |
Interim goal price (in dollars per share) |  |  |  |  |  |  |  |  | $ 25 |  |  |  | $ 55 |
Distribution to be made to company's employees due to achievement of interim goal price of $25 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 $25 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 $25 per share |  |  |  |  |  |  |  |  |  | 5.1 |  |  |  |
Final goal price (in dollars per share) |  |  |  |  |  |  |  |  |  |  | $ 37.50 |  |  | $ 80
Distribution to be made to the company's employees due to achievement of interim goal price of $25 per share |  |  |  |  |  |  |  |  |  |  | 11.1 |  |  |
Percentage of the total distribution paid in September 2013 |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |
Current distribution to be made to the company's employees due to achievement of final goal price of $37.50 per share |  |  |  |  |  |  |  |  |  |  | 2.8 |  |  |
Percentage of the total distribution to be paid in August 2014 |  |  |  |  |  |  |  |  |  |  | 75.00% |  |  |
Deferred distribution to be made to the company's employees due to achievement of final goal price of $37.50 per share |  |  |  |  |  |  |  |  |  |  | $ 8.3 |  |  |
Number of trading days during which the closing price per share of the company's common stock equals or exceeds the goal price |  |  |  |  |  |  |  |  |  |  |  | 20 days |  |
Number of consecutive trading days |  |  |  |  |  |  |  |  |  |  |  | 60 days |  |

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