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STOCK-BASED COMPENSATION (Detail 3) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Mar. 31, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Stock options          
Stock-based compensation          
Weighted-average grant-date fair value of options granted (in dollars per share) $ 51.14     $ 50.20 $ 29.33
Total intrinsic value of options exercised $ 11.9   $ 25.4 $ 841.5 $ 40.4
Cash received from option exercises 1.9   $ 7.3 43.6 $ 15.0
Total unrecognized compensation expense related to non-vested shares granted to employees $ 76.7     $ 76.7  
Cost expected to be recognized over a weighted-average period       2 years 10 months 24 days  
Stock units and stock awards expected to vest (in shares) 6,428,000     6,428,000  
Restricted stock units          
Stock-based compensation          
Total unrecognized compensation expense related to non-vested shares granted to employees $ 13.7     $ 13.7  
Cost expected to be recognized over a weighted-average period       2 years  
Stock units and stock awards expected to vest (in shares) 200,000     200,000  
Number of Shares          
Non-vested at the beginning of the period (in shares)   149,000   149,000  
Granted (in shares) 8,000 83,000 0    
Vested (in shares)       (43,000)  
Forfeited/cancelled (in shares)       (14,000)  
Non-vested at the end of the period (in shares) 183,000     183,000  
Weighted Average Grant-Date Fair Value          
Non-vested at the beginning of the period (in dollars per share)   $ 61.09   $ 61.09  
Granted (in dollars per share) $ 147.36 $ 135.48 $ 147.36 136.50 $ 69.00
Vested (in dollars per share)       57.57  
Forfeited/cancelled (in dollars per share)       63.57  
Non-vested at the end of the period (in dollars per share) $ 98.95     $ 98.95