Consolidated Statement of Changes in Members' Equity - USD ($) $ in Millions		Total		Common Units	Accumulated Other Comprehensive Loss	Non-Controlling Interest	Redeemable Non-Controlling Interest (Temporary Equity)
Member equity, beginning balance at Dec. 31, 2020		$ 3,213.0		$ 1,508.8	$ (15.3)	$ 1,719.5
Units outstanding, beginning balance (in shares) at Dec. 31, 2020				489,400,000
Increase (Decrease) in Members' Equity
Conversion of restricted units for common units, net of units withheld for taxes		(1.2)		$ (1.2)
Conversion of restricted units for common units, net of units withheld for taxes (in shares)				700,000
Unit-based compensation		6.5		$ 6.5
Contributions from non-controlling interests		0.9				0.9
Distributions		(72.9)		(47.1)		(25.8)	$ (0.2)
Unrealized gain on designated cash flow hedge	[2]	3.6	[1]		3.6
Fair value adjustment related to redeemable non-controlling interest		$ (0.1)		(0.1)			0.2
Common units repurchased (in shares)		0
Net income (loss)		$ 12.6		(12.7)		25.3
Member equity, end balance at Mar. 31, 2021		3,162.4		$ 1,454.2	(11.7)	1,719.9
Units outstanding, end balance (in shares) at Mar. 31, 2021				490,100,000
Redeemable noncontrolling interest, beginning balance at Dec. 31, 2020							0.0
Increase (Decrease) in Temporary Equity
Distributions		(72.9)		$ (47.1)		(25.8)	(0.2)
Fair value adjustment related to redeemable non-controlling interest		(0.1)		(0.1)			0.2
Redeemable noncontrolling interest, ending balance at Mar. 31, 2021							$ 0.0
Member equity, beginning balance at Dec. 31, 2021		$ 2,987.0		$ 1,325.8	(1.4)	1,662.6
Units outstanding, beginning balance (in shares) at Dec. 31, 2021		484,277,258		484,300,000
Increase (Decrease) in Members' Equity
Conversion of restricted units for common units, net of units withheld for taxes		$ (4.2)		$ (4.2)
Conversion of restricted units for common units, net of units withheld for taxes (in shares)				1,200,000
Unit-based compensation		8.1		$ 8.1
Contributions from non-controlling interests		7.3				7.3
Distributions		(91.0)		(56.4)		(34.6)
Unrealized gain on designated cash flow hedge		0.1	[1]		0.1
Redemption of non-controlling interest		(50.5)				(50.5)
Common units repurchased		$ (17.0)		$ (17.0)
Common units repurchased (in shares)		(2,093,842)		(2,100,000)
Net income (loss)		$ 66.0		$ 35.2		30.8
Member equity, end balance at Mar. 31, 2022		$ 2,905.8		$ 1,291.5	$ (1.3)	1,615.6
Units outstanding, end balance (in shares) at Mar. 31, 2022		483,364,767		483,400,000
Increase (Decrease) in Temporary Equity
Distributions		$ (91.0)		$ (56.4)		$ (34.6)

[1] Includes tax expense of $1.1 million for the three months ended March 31, 2021.

[2] Includes tax expense of $1.1 million.