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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Share-based Payment Arrangement [Abstract]    
Total remaining unrecognized compensation cost $ 173.0  
Unrecognized compensation cost, recognition period 33 months  
Options granted (in shares) 1.7  
Weighted average exercise price of options granted (in dollars per share) $ 72.82  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock units granted (in shares) 0.6  
Weighted average grant date fair value (in dollars per share) $ 72.85  
Market Based Restricted Stock Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock units granted (in shares) 0.1  
Weighted average grant date fair value (in dollars per share) $ 82.67  
Award vesting period 3 years  
Average risk-free interest rate 0.20% 2.20%
Expected volatility (as a percent) 32.70% 29.40%
Market Based Restricted Stock Units Related to Previous Year's Grant    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock units granted (in shares) 0.1  
Minimum | Market Based Restricted Stock Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares expected to be granted as percent of target 0.00%  
Maximum | Market Based Restricted Stock Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares expected to be granted as percent of target 175.00%