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Equity-Based Awards (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Equity-based compensation expense [Abstract]    
Total compensation expense $ 39.1 $ 39.1
Phantom Unit Awards [Member]    
Equity-based compensation expense [Abstract]    
Total compensation expense 38.0 36.2
Profits Interest Awards [Member]    
Equity-based compensation expense [Abstract]    
Total compensation expense $ 1.1 $ 2.9