CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (UNAUDITED) - USD ($) $ in Millions	Total	Limited Partner Class A Shares	Noncontrolling Interest
Balance, beginning of period at Dec. 31, 2020	$ 1,326.0	$ 125.0	$ 1,201.0
Net income	159.6	8.6	151.0
Equity-based compensation	0.4	0.4
Distributions to unitholders	(127.3)	(8.2)	(119.1)
Recognition of deferred tax asset	26.4	26.4
Sales of shares held by Sponsors		31.8	(31.8)
Balance, end of period at Mar. 31, 2021	1,385.1	184.0	1,201.1
Balance, beginning of period at Dec. 31, 2020	1,326.0	125.0	1,201.0
Net income	452.7
Balance, end of period at Sep. 30, 2021	669.1	135.7	533.4
Balance, beginning of period at Mar. 31, 2021	1,385.1	184.0	1,201.1
Net income	162.0	11.0	151.0
Equity-based compensation	0.3	0.3
Distributions to unitholders	(128.8)	(11.3)	(117.5)
Balance, end of period at Jun. 30, 2021	1,418.6	184.0	1,234.6
Net income	131.1	9.9	121.2
Equity-based compensation	0.4	0.4
Distributions to unitholders	(143.6)	(12.7)	(130.9)
Recognition of deferred tax asset	14.8	14.8
Class B unit repurchase	(750.0)	(60.4)	(689.6)
Class B unit repurchase transaction costs	(2.2)	(0.3)	(1.9)
Balance, end of period at Sep. 30, 2021	669.1	135.7	533.4
Balance, beginning of period at Dec. 31, 2021	753.1	204.1	549.0
Net income	159.6	16.9	142.7
Equity-based compensation	0.5	0.5
Distributions to unitholders	(131.0)	(17.5)	(113.5)
Transaction costs	(0.4)	(0.1)	(0.3)
Balance, end of period at Mar. 31, 2022	781.8	203.9	577.9
Balance, beginning of period at Dec. 31, 2021	753.1	204.1	549.0
Net income	470.8
Balance, end of period at Sep. 30, 2022	513.9	247.8	266.1
Balance, beginning of period at Mar. 31, 2022	781.8	203.9	577.9
Net income	151.8	22.0	129.8
Equity-based compensation	0.4	0.4
Distributions to unitholders	(131.8)	(24.2)	(107.6)
Recognition of deferred tax asset	86.4	86.4
Sales of shares held by Sponsors		27.0	(27.0)
Class B unit repurchase	(400.0)	(66.6)	(333.4)
Transaction costs	(1.1)	(0.2)	(0.9)
Balance, end of period at Jun. 30, 2022	487.5	248.7	238.8
Net income	159.4	23.2	136.2
Equity-based compensation	0.4	0.4
Distributions to unitholders	(133.4)	(24.5)	(108.9)
Balance, end of period at Sep. 30, 2022	$ 513.9	$ 247.8	$ 266.1