Equity-Based Awards (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Equity-based compensation expense [Abstract]
Total compensation expense	$ 39.5	$ 37.3	$ 120.3	$ 107.8
Phantom Unit Awards [Member]
Equity-based compensation expense [Abstract]
Total compensation expense	37.3	34.7	113.1	99.6
Profits Interest Awards [Member]
Equity-based compensation expense [Abstract]
Total compensation expense	2.2	2.5	7.2	8.1
Liability-classified awards [Member]
Equity-based compensation expense [Abstract]
Total compensation expense	$ 0.0	$ 0.1	$ 0.0	$ 0.1