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SHARE-BASED COMPENSATION - Stock Option Activity (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Weighted Average Exercise Price Per Share          
Exercised, weighted average exercise price per share (in dollars per share)     $ 17.45    
Share based compensation expense $ 27,646,000 $ 34,318,000 $ 55,927,000 $ 62,264,000  
Share based compensation - Unrecognized deferred compensation cost $ 160,592,000   $ 160,592,000    
Risk-free interest rate     1.03%    
Expected life (in years)     6 years 3 months    
Dividend yield     0.00%    
Volatility     32.94%    
Grant date fair value     $ 11.45    
2017 LTIP          
Weighted Average Exercise Price Per Share          
Beginning balance (in dollars per share)     25.52    
Granted (in dollars per share)     34.45    
Forfeited (in dollars per share)     26.83    
Ending balance (in dollars per share) $ 25.99   25.99    
Options exercisable (in dollars per share) $ 20.00   $ 20.00    
Options outstanding, Weighted Average Remaining Contractual Term (in years)     8 years 1 month 6 days 8 years 8 months 8 days  
Options exercisable, Weighted Average Remaining Contractual Term (in years)     6 years 10 months 2 days    
Options outstanding, Aggregate Intrinsic Value $ 294,984,000   $ 294,984,000   $ 457,608,000
Options exercisable, Aggregate Intrinsic Value $ 54,504,000   $ 54,504,000    
2017 LTIP | Share-based Payment Arrangement, Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]          
Beginning balance (in shares)     37,062,146    
Granted (in shares)     896,398    
Option exercises     1,206,372    
Forfeited (in shares)     (655,043)    
Ending balance (in shares) 36,097,129   36,097,129    
Options exercisable (in shares) 3,854,992   3,854,992    
Weighted Average Exercise Price Per Share          
Share based compensation expense $ 24,473,000 25,327,000 $ 48,696,000 $ 45,676,000  
Share based compensation - Unrecognized deferred compensation cost 102,654,000   $ 102,654,000    
Expected time (in years) unrecogized compensation costs relating to share based awards will be recognized     2 years 4 months 9 days    
2017 LTIP | Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]          
Granted (in shares)     7,313,873    
Weighted Average Exercise Price Per Share          
Share based compensation expense 2,868,000 4,419,000 $ 5,850,000 8,320,000  
Share based compensation - Unrecognized deferred compensation cost 57,633,000   $ 57,633,000    
Expected time (in years) unrecogized compensation costs relating to share based awards will be recognized     4 years 6 months 3 days    
Grant date fair value     $ 10.65    
2019 LTIP | Restricted Stock          
Weighted Average Exercise Price Per Share          
Share based compensation expense 261,000 $ 635,000 $ 578,000 $ 1,211,000  
Share based compensation - Unrecognized deferred compensation cost $ 305,000   $ 305,000