CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (DEFICIT) (UNAUDITED) - USD ($) $ in Millions	Total	Limited Partner Class A Shares	Noncontrolling Interest
Balance, beginning of period at Dec. 31, 2022	$ 529.0	$ 245.1	$ 283.9
Net income	142.2	20.7	121.5
Equity-based compensation	0.6	0.6
Distributions to unitholders	(136.7)	(25.1)	(111.6)
Recognition of deferred tax asset	4.3	4.3
Class B unit repurchase	(100.0)	(17.5)	(82.5)
Transaction costs	(0.9)	(0.2)	(0.7)
Balance, end of period at Mar. 31, 2023	438.5	227.9	210.6
Balance, beginning of period at Dec. 31, 2022	529.0	245.1	283.9
Net income	454.9
Balance, end of period at Sep. 30, 2023	445.3	367.4	77.9
Balance, beginning of period at Mar. 31, 2023	438.5	227.9	210.6
Net income	147.9	25.1	122.8
Equity-based compensation	0.4	0.4
Distributions to unitholders	(138.3)	(25.9)	(112.4)
Recognition of deferred tax asset	87.2	87.2
Sales of shares held by Sponsors		11.0	(11.0)
Class B unit repurchase	(100.0)	(23.4)	(76.6)
Transaction costs	(0.9)	(0.2)	(0.7)
Balance, end of period at Jun. 30, 2023	434.8	302.1	132.7
Net income	164.8	35.3	129.5
Equity-based compensation	0.3	0.3
Distributions to unitholders	(140.1)	(34.2)	(105.9)
Recognition of deferred tax asset	86.2	86.2
Sales of shares held by Sponsors		6.8	(6.8)
Class B unit repurchase	(100.0)	(28.9)	(71.1)
Transaction costs	(0.7)	(0.2)	(0.5)
Balance, end of period at Sep. 30, 2023	445.3	367.4	77.9
Balance, beginning of period at Dec. 31, 2023	363.2	340.2	23.0
Net income	161.9	44.6	117.3
Equity-based compensation	0.5	0.5
Distributions to unitholders	(143.6)	(50.7)	(92.9)
Recognition of deferred tax asset	100.4	100.4
Sales of shares held by Sponsors		5.2	(5.2)
Class B unit repurchase	(100.0)	(35.6)	(64.4)
Transaction costs	(0.7)	(0.3)	(0.4)
Balance, end of period at Mar. 31, 2024	381.7	404.3	(22.6)
Balance, beginning of period at Dec. 31, 2023	363.2	340.2	23.0
Net income	486.9
Balance, end of period at Sep. 30, 2024	441.8	531.0	(89.2)
Balance, beginning of period at Mar. 31, 2024	381.7	404.3	(22.6)
Net income	160.3	49.5	110.8
Equity-based compensation	0.1	0.1
Distributions to unitholders	(145.7)	(52.1)	(93.6)
Recognition of deferred tax asset	107.0	107.0
Sales of shares held by Sponsors		(2.7)	2.7
Class B unit repurchase	(100.0)	(41.3)	(58.7)
Transaction costs	(0.8)	(0.3)	(0.5)
Balance, end of period at Jun. 30, 2024	402.6	464.5	(61.9)
Net income	164.7	58.6	106.1
Equity-based compensation	0.5	0.5
Distributions to unitholders	(147.5)	(61.1)	(86.4)
Recognition of deferred tax asset	122.4	122.4
Sales of shares held by Sponsors		(11.1)	11.1
Class B unit repurchase	(100.0)	(42.5)	(57.5)
Transaction costs	(0.9)	(0.3)	(0.6)
Balance, end of period at Sep. 30, 2024	$ 441.8	$ 531.0	$ (89.2)