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EQUITY COMPENSATION - Restricted Units (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended
Mar. 17, 2022
Mar. 31, 2022
Mar. 31, 2021
Equity compensation      
Dividend declared and paid per class A common stock (in dollars per share) $ 0.61    
Distribution equivalents made to holders   $ 8.0  
Class A Common Stock      
Equity compensation      
Shares delivered in period (in shares)   2,800,000 2,400,000
Dividend declared and paid per class A common stock (in dollars per share)   $ 0.61 $ 0.47
Restricted units      
Equity compensation      
Shares delivered in period (in shares)   5,100,000 4,200,000
Restricted Units      
Balance at the beginning of the period (in shares)   18,323,036  
Granted (in shares)   3,789,737  
Vested (in shares)   (4,996,756)  
Forfeited (in shares)   (63,769)  
Balance at the end of the period (in shares)   17,052,248  
Weighted Average Grant Date Fair Value Per Unit      
Balance at the beginning of the period (in dollars per share)   $ 36.43  
Granted (in dollars per share)   74.77  
Vested (in dollars per share)   26.07  
Forfeited (in dollars per share)   50.90  
Balance at the end of the period (in dollars per share)   $ 47.94  
Unrecognized compensation expenses   $ 680.4  
Weighted average period of compensation expense expected to be recognized   4 years 1 month 6 days  
Restricted units | Senior executives      
Equity compensation      
Annual award vesting percentage   25.00%