Consolidated Statements 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, 2016		$ 5,265.6		$ 1,880.9	$ 0.0	$ 3,384.7
Units outstanding, beginning balance (in shares) at Dec. 31, 2016				180,000,000.0
Increase (Decrease) in Members' Equity
Issuance of common units by ENLK		106.9				106.9
Issuance of Preferred Units by ENLK		394.0				394.0
Conversion of restricted units for common units, net of units withheld for taxes		(10.1)		$ (4.8)		(5.3)
Conversion of restricted units for common units, net of units withheld for taxes (in shares)				600,000
Unit-based compensation		42.7		$ 21.3		21.4
Change in equity due to issuance of units by ENLK		0.1				0.1
Non-controlling interest contribution		57.3				57.3
Distributions		(619.1)		(186.0)		(433.1)	$ (0.6)
Contribution from Devon to ENLK		1.3				1.3
Loss on designated cash flow hedge	[1]	(2.0)	[2]		(2.0)
Net income (loss)		320.0		212.8		107.2
Member equity, end balance at Dec. 31, 2017		5,556.7		$ 1,924.2	(2.0)	3,634.5
Units outstanding, end balance (in shares) at Dec. 31, 2017				180,600,000
Redeemable noncontrolling interest, beginning balance at Dec. 31, 2016							5.2
Increase (Decrease) in Temporary Equity
Net income (loss)		320.0		$ 212.8		107.2
Redeemable noncontrolling interest, ending balance at Dec. 31, 2017							4.6
Increase (Decrease) in Members' Equity
Issuance of common units by ENLK		46.1				46.1
Conversion of restricted units for common units, net of units withheld for taxes		(11.3)		$ (5.7)		(5.6)
Conversion of restricted units for common units, net of units withheld for taxes (in shares)				700,000
Unit-based compensation		41.9		$ 20.5		21.4
Change in equity due to issuance of units by ENLK		0.1		0.7		(0.6)
Non-controlling interest contribution		90.2				90.2
Distributions		(712.0)		(194.8)		(517.2)
Loss on designated cash flow hedge	[2]	0.0
Fair value adjustment related to redeemable non-controlling interest		(4.1)		(0.8)		(3.3)	4.1
Net income (loss)		(33.4)		(13.2)		(20.2)	0.6
Member equity, end balance at Dec. 31, 2018		$ 4,974.2		$ 1,730.9	(2.0)	3,245.3
Units outstanding, end balance (in shares) at Dec. 31, 2018		181,309,981		181,300,000
Increase (Decrease) in Temporary Equity
Fair value adjustment related to redeemable non-controlling interest		$ (4.1)		$ (0.8)		(3.3)	4.1
Net income (loss)		(33.4)		(13.2)		(20.2)	0.6
Redeemable noncontrolling interest, ending balance at Dec. 31, 2018							9.3
Increase (Decrease) in Members' Equity
Issuance of common units for ENLK public common units related to the Merger		399.0		$ 1,958.1		(1,559.1)
Issuance of common units for ENLK public common units related to the Merger (in shares)				304,900,000
Conversion of restricted units for common units, net of units withheld for taxes		(10.6)		$ (7.8)		(2.8)
Conversion of restricted units for common units, net of units withheld for taxes (in shares)				1,600,000
Unit-based compensation		38.9		$ 37.5		1.4
Non-controlling interest contribution		97.5				97.5
Distributions		(687.4)		(467.2)		(220.2)	(0.3)
Loss on designated cash flow hedge	[1],[3]	(9.0)	[2]		(9.0)
Fair value adjustment related to redeemable non-controlling interest		3.0		3.0			(4.0)
Net income (loss)		(999.8)		(1,119.3)		119.5	0.2
Member equity, end balance at Dec. 31, 2019		$ 3,806.1		$ 2,135.5	$ (11.0)	1,681.6
Units outstanding, end balance (in shares) at Dec. 31, 2019		487,791,612		487,800,000
Increase (Decrease) in Temporary Equity
Fair value adjustment related to redeemable non-controlling interest		$ 3.0		$ 3.0			(4.0)
Net income (loss)		$ (999.8)		$ (1,119.3)		$ 119.5	0.2
Redeemable noncontrolling interest, ending balance at Dec. 31, 2019							$ 5.2

[1] Includes a tax benefit of $0.2 million.

[2] The loss on designated cash flow hedge recorded in accumulated other comprehensive loss for the years ended December 31, 2019 and 2017 was net of a tax benefit of $3.4 million and $0.2 million, respectively.

[3] Includes a tax benefit of $3.4 million.