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STOCK-BASED COMPENSATION (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
plan
Jun. 30, 2014
USD ($)
Stock-based compensation        
Stock-based compensation plans | plan     2  
Compensation expense on share-based plans $ 8.5 $ 8.1 $ 14.8 $ 15.1
Stock options        
Stock-based compensation        
Excess tax benefit realized for tax deductions from non-qualified stock option exercises and disqualifying dispositions of incentive stock options $ 115.6 $ 0.7 $ 300.3 $ 3.3