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STOCK-BASED COMPENSATION (Details 2) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Jun. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Stock options
         
Stock-based compensation          
Weighted-average grant-date fair value of options granted (in dollars per share)       $ 29.33 $ 22.44
Total intrinsic value of options exercised $ 25.4   $ 3.3 $ 40.4 $ 87.6
Cash received from option exercises 7.3   1.9 15.0 18.2
Total unrecognized compensation expense related to non-vested shares granted to employees 46.2     46.2  
Cost expected to be recognized over a weighted-average period       2 years 6 months  
Stock units and stock awards expected to vest (in shares) 12,574     12,574  
Restricted stock units
         
Stock-based compensation          
Total unrecognized compensation expense related to non-vested shares granted to employees $ 6.5     $ 6.5  
Cost expected to be recognized over a weighted-average period       2 years 4 months 24 days  
Stock units and stock awards expected to vest (in shares) 100     100  
Number of Shares          
Non-vested at the beginning of the period (in shares)       391  
Granted (in shares) 0 10 0    
Vested (in shares)       (237)  
Forfeited/cancelled (in shares)       (13)  
Non-vested at the end of the period (in shares) 151     151  
Weighted Average Grant-Date Fair Value          
Non-vested at the beginning of the period (in dollars per share)       $ 49.27  
Granted (in dollars per share) $ 69.00 $ 69.00   $ 69.00 $ 53.25
Vested (in dollars per share)       $ 44.11  
Forfeited/cancelled (in dollars per share)       $ 51.15  
Non-vested at the end of the period (in dollars per share) $ 58.56     $ 58.56