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STOCK-BASED COMPENSATION (Details 2) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Stock options
       
Stock-based compensation        
Weighted-average grant-date fair value of options granted (in dollars per share) $ 25.71 $ 25.16 $ 29.35 $ 22.44
Total intrinsic value of options exercised $ 3.7 $ 81.0 $ 15.1 $ 84.2
Cash received from option exercises 2.0 13.9 7.7 16.3
Total unrecognized compensation expense related to non-vested shares granted to employees 52.4   52.4  
Cost expected to be recognized over a weighted-average period     2 years 8 months 12 days  
Stock units and stock awards expected to vest (in shares) 12,918   12,918  
Restricted stock units
       
Stock-based compensation        
Total unrecognized compensation expense related to non-vested shares granted to employees $ 8.8   $ 8.8  
Cost expected to be recognized over a weighted-average period     1 year 4 months 24 days  
Stock units and stock awards expected to vest (in shares) 300   300  
Number of Shares        
Non-vested at the beginning of the period (in shares)     391  
Granted (in shares) 10      
Vested (in shares)     (39)  
Forfeited/cancelled (in shares)     (8)  
Non-vested at the end of the period (in shares) 354   354  
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 $ 54.64 $ 69.00 $ 53.25
Vested (in dollars per share)     $ 53.98  
Forfeited/cancelled (in dollars per share)     $ 53.34  
Non-vested at the end of the period (in dollars per share) $ 49.23   $ 49.23