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EQUITY-BASED COMPENSATION - Market-Based Performance Share Units (Details) - PSUs - $ / shares
shares in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Non-vested at beginning of period (shares) 0.5    
Granted (shares) 0.2    
Adjustment for performance results achieved (shares) 0.2    
Vested (shares) (0.5)    
Forfeited (shares) 0.0    
Non-vested at end of period (shares) 0.4 0.5  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Non-vested at beginning of period (USD per share) $ 105.47    
Granted (USD per share) 159.74 $ 121.01 $ 92.50
Adjustment for performance results achieved (USD per share) 92.50    
Vested (USD per share) 92.50    
Forfeited (USD per share) 0    
Non-vested at end of period (USD per share) $ 139.00 $ 105.47