Equity-Based Awards (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Equity-based compensation expense [Abstract]
Total compensation expense	$ 41.1	$ 41.7	$ 80.2	$ 80.8
Phantom Unit Awards [Member]
Equity-based compensation expense [Abstract]
Total compensation expense	38.0	39.6	76.0	75.8
Profits Interest Awards [Member]
Equity-based compensation expense [Abstract]
Total compensation expense	3.0	2.1	4.1	5.0
Liability-classified awards [Member]
Equity-based compensation expense [Abstract]
Total compensation expense	$ 0.1	$ 0.0	$ 0.1	$ 0.0