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, 2019		$ 3,806.1		$ 2,135.5	$ (11.0)	$ 1,681.6
Units outstanding, beginning balance (in shares) at Dec. 31, 2019				487,800,000
Increase (Decrease) in Members' Equity
Conversion of restricted units for common units, net of units withheld for taxes		(4.0)		$ (4.0)		0.0
Conversion of restricted units for common units, net of units withheld for taxes (in shares)				1,300,000
Unit-based compensation		12.3		$ 12.3		0.0
Contributions from non-controlling interests		37.1				37.1
Distributions		(117.7)		(93.3)		(24.4)	$ (0.3)
Gain (loss) on designated cash flow hedge	[2]	(13.1)	[1]		(13.1)
Fair value adjustment related to redeemable non-controlling interest		0.7		0.7			(0.9)
Net income (loss)		(260.4)		(286.8)		26.4	0.0
Member equity, end balance at Mar. 31, 2020		3,461.0		$ 1,764.4	(24.1)	1,720.7
Units outstanding, end balance (in shares) at Mar. 31, 2020				489,100,000
Redeemable noncontrolling interest, beginning balance at Dec. 31, 2019							5.2
Increase (Decrease) in Temporary Equity
Distributions		(117.7)		$ (93.3)		(24.4)	(0.3)
Fair value adjustment related to redeemable non-controlling interest		0.7		0.7			(0.9)
Redemption of non-controlling interest							(4.0)
Redeemable noncontrolling interest, ending balance at Mar. 31, 2020							0.0
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		489,381,149		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)
Gain (loss) 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
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		490,055,402		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

[1] Includes a tax expense of $1.1 million and a tax benefit of $4.0 million for the three months ended March 31, 2021 and 2020, respectively.

[2] Includes a tax expense of $1.1 million.