10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

Form 10-Q

ýQuarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended June 30, 2018

OR

¨Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from               to

Commission file number: 001-36336

ENLINK MIDSTREAM, LLC

(Exact name of registrant as specified in its charter)

Delaware	46-4108528
(State of organization)	(I.R.S. Employer Identification No.)
1722 Routh St., Suite 1300
Dallas, Texas	75201
(Address of principal executive offices)	(Zip Code)

(214) 953-9500

(Registrant’s telephone number, including area code)

Indicate by check mark whether registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ý No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	ý	Accelerated filer	¨
Non-accelerated filer	¨	Smaller reporting company	¨
(Do not check if a smaller reporting company)		Emerging growth company	¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ¨ No ý

As of July 26, 2018, the Registrant had 181,132,896 common units outstanding.

TABLE OF CONTENTS

Item	Description	Page
	PART I—FINANCIAL INFORMATION
1.	Financial Statements	5
2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	38
3.	Quantitative and Qualitative Disclosures About Market Risk	56
4.	Controls and Procedures	58
	PART II—OTHER INFORMATION
1.	Legal Proceedings	59
1A.	Risk Factors	59
2.	Unregistered Sales of Equity Securities and Use of Proceeds	61
6.	Exhibits	62

2

DEFINITIONS

The following terms as defined are used in this document:

Defined Term	Definition
/d	Per day.
2017 EDA	Equity Distribution Agreement entered into by ENLK in August 2017 with UBS Securities LLC, Barclays Capital Inc., BMO Capital Markets Corp., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Jefferies LLC, Mizuho Securities USA LLC, RBC Capital Markets, LLC, SunTrust Robinson Humphrey, Inc., and Wells Fargo Securities, LLC to sell up to $600.0 million in aggregate gross sales of our common units from time to time through an “at the market” equity offering program.
AMZ	Alerian MLP Index for Master Limited Partnerships.
ASC	The FASB Accounting Standards Codification.
ASC 606	ASC 606, Revenue from Contracts with Customers.
ASU	The FASB Accounting Standards Update.
Ascension JV	Ascension Pipeline Company, LLC, a joint venture between a subsidiary of ENLK and a subsidiary of Marathon Petroleum Corporation in which ENLK owns a 50% interest and Marathon Petroleum Corporation owns a 50% interest. The Ascension JV, which began operations in April 2017, owns an NGL pipeline that connects ENLK’s Riverside fractionator to Marathon Petroleum Corporation’s Garyville refinery.
Bbls	Barrels.
Bcf	Billion cubic feet.
Cedar Cove JV	Cedar Cove Midstream LLC, a joint venture between a subsidiary of ENLK and a subsidiary of Kinder Morgan, Inc. in which ENLK owns a 30% interest and Kinder Morgan, Inc. owns a 70% interest. The Cedar Cove JV, which was formed in November 2016, owns gathering and compression assets in Blaine County, Oklahoma, located in the STACK play.
CFTC	U.S. Commodity Futures Trading Commission.
CNOW	Central Northern Oklahoma Woodford Shale.
Devon	Devon Energy Corporation.
Delaware Basin JV	Delaware G&P LLC, a joint venture between a subsidiary of ENLK and an affiliate of NGP in which ENLK owns a 50.1% interest and NGP owns a 49.9% interest. The Delaware Basin JV, which was formed in August 2016, owns the Lobo processing facilities located in the Delaware Basin in Texas.
ENLC	EnLink Midstream, LLC.
ENLC Credit Facility	A $250.0 million revolving credit facility entered into by ENLC that matures on March 7, 2019, which includes a $125.0 million letter of credit subfacility.
ENLK	EnLink Midstream Partners, LP or EnLink Midstream Partners, LP together with its consolidated subsidiaries. Also referred to as the “Partnership.”
ENLK Credit Facility	A $1.5 billion unsecured revolving credit facility entered into by ENLK that matures on March 6, 2020, which includes a $500.0 million letter of credit subfacility.
EOGP	EnLink Oklahoma Gas Processing, LP or EnLink Oklahoma Gas Processing, LP together with, when applicable, its consolidated subsidiaries. EOGP is a partnership in which ENLK and ENLC hold an approximate 84% and 16% interest, respectively.
FASB	Financial Accounting Standards Board.
FERC	Federal Energy Regulatory Commission.
GAAP	Generally accepted accounting principles in the United States of America.
Gal	Gallons.
GCF	Gulf Coast Fractionators, which owns an NGL fractionator in Mont Belvieu, Texas. ENLK owns 38.75% of GCF.
General Partner	EnLink Midstream GP, LLC, the general partner of ENLK, which owns a 0.4% general partner interest and all of the incentive distribution rights in ENLK.
GIP	Global Infrastructure Management, LLC, an independent infrastructure fund manager, itself, or its affiliates, including GIP III Stetson I, L.P. and GIP III Stetson II, L.P.
Greater Chickadee	Crude oil gathering system in Upton and Midland counties, Texas in the Permian Basin.
Gross Operating Margin	A non-GAAP financial measure. See “Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures” for the definition and other information.
HEP	Howard Energy Partners. ENLK sold its 31% ownership interest in HEP in March 2017.
ISDAs	International Swaps and Derivatives Association Agreements.

3

Mcf	Thousand cubic feet.
MMbtu	Million British thermal units.
MMcf	Million cubic feet.
MVC	Minimum volume commitment.
NGL	Natural gas liquid.
NGP	NGP Natural Resources XI, LP, an affiliate of ENLK’s joint venture partner in the Delaware Basin JV.
Operating Partnership	EnLink Midstream Operating, LP, a Delaware limited partnership and wholly owned subsidiary of ENLK.
ORV	ENLK’s Ohio River Valley crude oil, condensate stabilization, natural gas compression, and brine disposal assets in the Utica and Marcellus shales.
OTC	Over-the-counter.
Permian Basin	A large sedimentary basin that includes the Midland and Delaware Basins in West Texas.
POL contracts	Percentage-of-liquids contracts.
POP contracts	Percentage-of-proceeds contracts.
Series B Preferred Units	ENLK’s Series B Cumulative Convertible Preferred Units.
Series C Preferred Units	ENLK’s Series C Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units.
STACK	Sooner Trend Anadarko Basin Canadian and Kingfisher Counties in Oklahoma.
VEX	ENLK’s Victoria Express Pipeline and related truck terminal and storage assets located in the Eagle Ford Shale in South Texas.

4

PART I—FINANCIAL INFORMATION

Item 1. Financial Statements

ENLINK MIDSTREAM, LLC

Consolidated Balance Sheets

(In millions, except unit data)

	June 30, 2018			December 31, 2017
	(Unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	36.8		$	31.2
Accounts receivable:
Trade, net of allowance for bad debt of $0.3 and $0.3, respectively	73.2			50.1
Accrued revenue and other	579.4			576.6
Related party	122.7			102.8
Fair value of derivative assets	4.0			6.8
Natural gas and NGLs inventory, prepaid expenses, and other	99.1			41.2
Total current assets	915.2			808.7
Property and equipment, net of accumulated depreciation of $2,745.8 and $2,533.0, respectively	6,763.2			6,587.0
Intangible assets, net of accumulated amortization of $360.4 and $298.7, respectively	1,435.4			1,497.1
Goodwill	1,542.2			1,542.2
Investment in unconsolidated affiliates	85.5			89.4
Other assets, net	42.1			13.4
Total assets	$	10,783.6		$	10,537.8
LIABILITIES AND MEMBERS’ EQUITY
Current liabilities:
Accounts payable and drafts payable	$	115.2		$	66.9
Accounts payable to related party	30.5			16.3
Accrued gas, NGLs, condensate, and crude oil purchases	509.2			476.1
Fair value of derivative liabilities	10.7			8.4
Installment payable, net of discount of $0.5 at December 31, 2017	—			249.5
Current maturities of long-term debt	483.7			—
Other current liabilities	206.4			222.9
Total current liabilities	1,355.7			1,040.1
Long-term debt	3,590.2			3,542.1
Asset retirement obligations	14.5			14.2
Other long-term liabilities	21.2			33.9
Deferred tax liability	358.0			346.2
Fair value of derivative liabilities	8.9			—
Redeemable non-controlling interest	4.6			4.6
Members’ equity:
Members’ equity (181,051,875 and 180,600,728 units issued and outstanding, respectively)	1,871.9			1,924.2
Accumulated other comprehensive loss	(2.0		)	(2.0		)
Non-controlling interest	3,560.6			3,634.5
Total members’ equity	5,430.5			5,556.7
Total liabilities and members’ equity	$	10,783.6		$	10,537.8

See accompanying notes to consolidated financial statements.

5

ENLINK MIDSTREAM, LLC

Consolidated Statements of Operations

(In millions, except per unit data)

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
	(Unaudited)
Revenues:
Product sales	$	1,435.1		$	927.2		$	2,934.3		$	1,917.2
Product sales—related parties	27.2			29.3			30.8			72.0
Midstream services	142.4			131.9			234.6			259.3
Midstream services—related parties	175.2			173.6			341.4			332.6
Gain (loss) on derivative activity	(15.2		)	1.6			(14.7		)	4.4
Total revenues	1,764.7			1,263.6			3,526.4			2,585.5
Operating costs and expenses:
Cost of sales (1)	1,325.6			932.4			2,707.1			1,934.7
Operating expenses	113.4			102.6			222.6			206.7
General and administrative	30.4			31.1			57.9			67.2
(Gain) loss on disposition of assets	1.2			(5.4		)	1.3			(0.3		)
Depreciation and amortization	145.3			142.5			283.4			270.8
Impairments	—			—			—			7.0
Gain on litigation settlement	—			(8.5		)	—			(26.0		)
Total operating costs and expenses	1,615.9			1,194.7			3,272.3			2,460.1
Operating income	148.8			68.9			254.1			125.4
Other income (expense):
Interest expense, net of interest income	(44.6		)	(47.7		)	(89.1		)	(92.6		)
Gain on extinguishment of debt	—			9.0			—			9.0
Income (loss) from unconsolidated affiliates	4.4			(0.1		)	7.4			0.6
Other income (expense)	(0.1		)	0.2			0.2			0.2
Total other expense	(40.3		)	(38.6		)	(81.5		)	(82.8		)
Income before non-controlling interest and income taxes	108.5			30.3			172.6			42.6
Income tax provision	(6.3		)	(3.2		)	(13.3		)	(6.2		)
Net income	102.2			27.1			159.3			36.4
Net income attributable to non-controlling interest	74.2			21.2			118.9			32.4
Net income attributable to ENLC	$	28.0		$	5.9		$	40.4		$	4.0
Net income attributable to ENLC per unit:
Basic common unit	$	0.15		$	0.03		$	0.22		$	0.02
Diluted common unit	$	0.15		$	0.03		$	0.22		$	0.02

(1) Includes related party cost of sales of $46.7 million and $50.9 millionfor thethree months endedJune 30, 2018and2017, respectively, and $80.8 million and $79.6 millionfor thesix months endedJune 30, 2018and2017, respectively.

See accompanying notes to consolidated financial statements.

6

ENLINK MIDSTREAM, LLC

Consolidated Statements of Comprehensive Income

(In millions)

	Three Months Ended June 30,					Six Months Ended June 30,
	2018		2017			2018		2017
	(Unaudited)
Net income	$	102.2	$	27.1		$	159.3	$	36.4
Loss on designated cash flow hedge, net of tax benefit of $0.2 million for the three and six months ended June 30, 2017	—		(2.0		)	—		(2.0		)
Comprehensive income	102.2		25.1			159.3		34.4
Comprehensive income attributable to non-controlling interest	74.2		19.6			118.9		30.8
Comprehensive income attributable to EnLink Midstream, LLC	$	28.0	$	5.5		$	40.4	$	3.6

See accompanying notes to consolidated financial statements.

7

ENLINK MIDSTREAM, LLC

Consolidated Statement of Changes in Members’ Equity

Six Months Ended June 30, 2018

(In millions)

	Common Units				Accumulated Other Comprehensive Loss			Non-Controlling Interest			Total			Redeemable Non-Controlling Interest (Temporary Equity)
	$			Units	$			$			$			$
	(Unaudited)
Balance, December 31, 2017	$	1,924.2		180.6	$	(2.0	)	$	3,634.5		$	5,556.7		$	4.6
Issuance of common units by ENLK	—			—	—			0.9			0.9			—
Conversion of restricted units for common units, net of units withheld for taxes	(3.5		)	0.5	—			—			(3.5		)	—
Non-controlling interest’s impact of conversion of restricted units	—			—	—			(3.4		)	(3.4		)	—
Unit-based compensation	8.4			—	—			8.4			16.8			—
Change in equity due to issuance of units by ENLK	(1.9		)	—	—			2.5			0.6			—
Contributions from non-controlling interests	—			—	—			54.3			54.3			—
Distributions	(95.7		)	—	—			(255.5		)	(351.2		)	—
Net income	40.4			—	—			118.9			159.3			—
Balance, June 30, 2018	$	1,871.9		181.1	$	(2.0	)	$	3,560.6		$	5,430.5		$	4.6

See accompanying notes to consolidated financial statements.

8

ENLINK MIDSTREAM, LLC

Consolidated Statements of Cash Flows

(In millions)

	Six Months Ended June 30,
	2018			2017
	(Unaudited)
Cash flows from operating activities:
Net income	$	159.3		$	36.4
Adjustments to reconcile net income to net cash provided by operating activities:
Impairments	—			7.0
Depreciation and amortization	283.4			270.8
Non-cash unit-based compensation	14.7			28.7
(Gain) loss on derivatives recognized in net income	14.7			(4.4		)
Gain on extinguishment of debt	—			(9.0		)
Cash settlements on derivatives	(0.4		)	(6.0		)
Amortization of debt issue costs, net discount (premium) of notes and installment payable	2.5			14.3
Distribution of earnings from unconsolidated affiliates	9.5			—
Income from unconsolidated affiliates	(7.4		)	(0.6		)
Non-cash revenue from contract restructuring	(45.5		)	—
Other operating activities	13.2			5.8
Changes in assets and liabilities, net of assets acquired and liabilities assumed:
Accounts receivable, accrued revenue, and other	(46.7		)	56.2
Natural gas and NGLs inventory, prepaid expenses, and other	(40.1		)	(34.0		)
Accounts payable, accrued gas and crude oil purchases, and other accrued liabilities	72.1			(36.1		)
Net cash provided by operating activities	429.3			329.1
Cash flows from investing activities:
Additions to property and equipment	(404.4		)	(471.7		)
Proceeds from sale of unconsolidated affiliate investment	—			189.7
Investment in unconsolidated affiliates	(0.1		)	(10.3		)
Distribution from unconsolidated affiliates in excess of earnings	1.9			7.4
Other investing activities	0.8			1.3
Net cash used in investing activities	(401.8		)	(283.6		)
Cash flows from financing activities:
Proceeds from borrowings	1,361.8			1,800.2
Payments on borrowings	(832.0		)	(1,384.9		)
Payment of installment payable for EOGP acquisition	(250.0		)	(250.0		)
Debt financing costs	—			(5.7		)
Conversion of restricted units, net of units withheld for taxes	(3.5		)	(4.8		)
Conversion of ENLK's restricted units, net of units withheld for taxes	(3.4		)	(5.1		)
Proceeds from issuance of ENLK common units	0.9			72.2
Distribution to members	(95.7		)	(92.9		)
Distributions to non-controlling partners	(255.5		)	(202.9		)
Contributions by non-controlling interests	54.3			28.5
Other financing activities	1.2			(0.4		)
Net cash used in financing activities	(21.9		)	(45.8		)
Net increase (decrease) in cash and cash equivalents	5.6			(0.3		)
Cash and cash equivalents, beginning of period	31.2			11.7
Cash and cash equivalents, end of period	$	36.8		$	11.4
Supplemental disclosures of cash flow information:
Cash paid for interest	$	89.1		$	79.1
Cash paid for income taxes	$	0.4		$	3.6
Non-cash investing activities:
Non-cash accrual of property and equipment	$	(5.0	)	$	(5.2	)
Discounted secured term loan receivable from contract restructuring	$	47.7		$	—

See accompanying notes to consolidated financial statements.

9

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements

June 30, 2018

(Unaudited)

(1) General

In this report, the terms “Company” or “Registrant,” as well as the terms “ENLC,” “our,” “we,” “us,” or like terms, are sometimes used as abbreviated references to EnLink Midstream, LLC itself or EnLink Midstream, LLC together with its consolidated subsidiaries, including ENLK and its consolidated subsidiaries. References in this report to “EnLink Midstream Partners, LP,” the “Partnership,” “ENLK,” or like terms refer to EnLink Midstream Partners, LP itself or EnLink Midstream Partners, LP together with its consolidated subsidiaries, including the Operating Partnership and EOGP.

Please read the notes to the consolidated financial statements in conjunction with the Definitions page set forth in this report prior to Part I—Financial Information.

(a) Organization of Business

EnLink Midstream, LLC is a publicly traded Delaware limited liability company formed in October 2013. The Company’s common units are traded on the New York Stock Exchange under the symbol “ENLC.”

Our assets consist of equity interests in ENLK and EOGP. ENLK is a publicly traded limited partnership formed on July 12, 2002 and is engaged in the gathering, transmission, processing, and marketing of natural gas, NGLs, condensate, and crude oil, as well as providing crude oil, condensate, and brine services to producers. EOGP is a partnership held by us and ENLK and is engaged in the gathering and processing of natural gas. As ofJune 30, 2018, our direct and indirect interests in ENLK and EOGP consisted of the following:

• 88,528,451common units representing an aggregate21.6%limited partner interest in ENLK;

• 100%ownership interest in the General Partner of ENLK, which owns a0.4%general partner interest and all of the incentive distribution rights in ENLK; and

• 16.1%limited partner interest in EOGP

Prior to July 18, 2018, subsidiaries of Devon collectively owned a100%equity interest in ENLC’s managing member, common units of ENLC representing approximately63.8%of the outstanding limited liability company interests in ENLC, and approximately23.1%of the outstanding limited partner interests in ENLK. On July 18, 2018, the Devon subsidiaries sold all of these interests to GIP. SeeNote 15—Subsequent Event for more information regarding this transaction.

(b) Nature of Business

We primarily focus on providing midstream energy services, including:

• gathering, compressing, treating, processing, transporting, storing, and selling natural gas;

• fractionating, transporting, storing, and selling NGLs; and

• gathering, transporting, stabilizing, storing, trans-loading, and selling crude oil and condensate, in addition to brine disposal services.

Our natural gas business includes connecting the wells of producers in our market areas to our gathering systems. Our gathering systems consist of networks of pipelines that collect natural gas from points at or near producing wells and transport it to our processing plants or to larger pipelines for further transmission. We operate processing plants that remove NGLs from the natural gas stream that is transported to the processing plants by our own gathering systems or by third-party pipelines. In conjunction with our gathering and processing business, we may purchase natural gas and NGLs from producers and other supply sources and sell that natural gas or NGLs to utilities, industrial consumers, marketers, and pipelines. Our transmission pipelines receive natural gas from our gathering systems and from third-party gathering and transmission systems and deliver natural gas to industrial end-users, utilities, and other pipelines.

Our fractionators separate NGLs into separate purity products, including ethane, propane, iso-butane, normal butane, and natural gasoline. Our fractionators receive NGLs primarily through our transmission lines that transport NGLs from East Texas and from our South Louisiana processing plants. Our fractionators also have the capability to receive NGLs by truck or rail

10

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

terminals. We also have agreements pursuant to which third parties transport NGLs from our West Texas and Central Oklahoma operations to our NGL transmission lines that then transport the NGLs to our fractionators. In addition, we have NGL storage capacity to provide storage for customers.

Our crude oil and condensate business includes the gathering and transmission of crude oil and condensate via pipelines, barges, rail, and trucks, in addition to condensate stabilization and brine disposal. We also purchase crude oil and condensate from producers and other supply sources and sell that crude oil and condensate through our terminal facilities to various markets.

Across our businesses, we primarily earn our fees through various fee-based contractual arrangements, which include stated fee-only contract arrangements or arrangements with fee-based components where we purchase and resell commodities in connection with providing the related service and earn a net margin as our fee. We earn our net margin under our purchase and resell contract arrangements primarily as a result of stated service-related fees that are deducted from the price of the commodities purchased. While our transactions vary in form, the essential element of most of our transactions is the use of our assets to transport a product or provide a processed product to an end-user or marketer at the tailgate of the plant, pipeline, or barge, truck, or rail terminal.

(2) Significant Accounting Policies

(a) Basis of Presentation

The accompanying consolidated financial statements are prepared in accordance with the instructions to Form 10-Q, are unaudited, and do not include all the information and disclosures required by GAAP for complete financial statements. All adjustments that, in the opinion of management, are necessary for a fair presentation of the results of operations for the interim periods have been made and are of a recurring nature unless otherwise disclosed herein. The results of operations for such interim periods are not necessarily indicative of results of operations for a full year. All significant intercompany balances and transactions have been eliminated in consolidation.

(b) Revenue Recognition

We generate the majority of our revenues from midstream energy services, including gathering, transmission, processing, fractionation, storage, condensate stabilization, brine services, and marketing, through various contractual arrangements, which include fee-based contract arrangements or arrangements where we purchase and resell commodities in connection with providing the related service and earn a net margin for our fee. While our transactions vary in form, the essential element of most of our transactions is the use of our assets to transport a product or provide a processed product to an end-user or marketer at the tailgate of the plant, pipeline, or barge, truck, or rail terminal. Revenues from both “Product sales” and “Midstream services” represent revenues from contracts with customers and are reflected on the consolidated statements of operations as follows:

• Product sales—Product sales represent the sale of natural gas, NGLs, crude oil, and condensate where the product is purchased and resold in connection with providing our midstream services as outlined above.

• Midstream services—Midstream services represent all other revenue generated as a result of performing our midstream services as outlined above.

Adoption of ASC 606

Effective January 1, 2018, we adopted ASC 606 using the modified retrospective method. ASC 606 replaces previous revenue recognition requirements in GAAP and requires entities to recognize revenue at an amount that reflects the consideration to which they expect to be entitled in exchange for transferring goods or services to a customer. ASC 606 also requires significantly expanded disclosures containing qualitative and quantitative information regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.

11

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

Evaluation of Our Contractual Performance Obligations

In adopting ASC 606, we evaluated our contracts with customers that are within the scope of ASC 606. In accordance with the new revenue recognition framework introduced by ASC 606, we identified our performance obligations under our contracts with customers. These performance obligations include:

• promises to perform midstream services for our customers over a specified contractual term and/or for a specified volume of commodities; and

• promises to sell a specified volume of commodities to our customers.

The identification of performance obligations under our contracts requires a contract-by-contract evaluation of when control, including the economic benefit, of commodities transfers to and from us (if at all). This evaluation of control changed the way we account for certain transactions effective January 1, 2018, specifically those contracts in which there is both a commodity purchase and a midstream service. For contracts where control of commodities transfers to us before we perform our services, we generally have no performance obligation for our services, and accordingly, we do not consider these revenue-generating contracts for purposes of ASC 606. Based on the control determination, all contractually-stated fees that are deducted from our payments to producers or other suppliers for commodities purchased are reflected as a reduction in the cost of such commodity purchases. Alternatively, for contracts where control of commodities transfers to us after we perform our services, we consider these contracts to contain performance obligations for our services. Accordingly, we consider the satisfaction of these performance obligations as revenue-generating and recognize the fees received for satisfying them as midstream service revenues over time as we satisfy our performance obligations. For contracts where control of commodities never transfers to us and we simply earn a fee for our services, we recognize these fees as midstream services revenues over time as we satisfy our performance obligations.

We also evaluate our contractual arrangements that contain a purchase and sale of commodities under the principal/agent provisions in ASC 606. For contracts where we possess control of the commodity and act as principal in the purchase and sale, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities when purchased. For contracts in which we do not possess control of the commodity and are acting as an agent, our consolidated statements of operations only reflect midstream services revenues that we earn based on the fees contained in the applicable contract.

Based on our review of our performance obligations in our contracts with customers, we changed the consolidated statement of operations classification for certain transactions from revenue to cost of sales or from cost of sales to revenue. For thethree and six months ended June 30, 2018, the reclassification of revenues and cost of sales resulted in a net decrease in revenue of approximately$163 million and $301 million, respectively, or 9% and 8%, respectively, compared to total revenues based on accounting prior to the adoption of ASC 606, with an equivalent net decrease in cost of sales. The change in total revenues as a result of the adoption of ASC 606 is made up of the following revenue line item changes (in millions):

	Increase (Decrease) in Revenue Due to ASC 606 Adoption
	Three Months Ended June 30, 2018			Six Months Ended June 30, 2018
Product sales	$	(46	)	$	(78	)
Product sales—related parties	(24		)	(46		)
Midstream services	(76		)	(153		)
Midstream services—related parties	(17		)	(24		)
Total	$	(163	)	$	(301	)

This change in accounting treatment had no impact on our operating income, net income, results of operations, financial condition, or cash flows.

Changes in Accounting Methodology for Certain Contracts

For NGL contracts in which we purchase raw mix NGLs and subsequently transport, fractionate, and market the NGLs, we accounted for these contracts prior to the adoption of ASC 606 as revenue-generating contracts in which the fees we earned for

12

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

our services were recorded as midstream services revenue on the consolidated statements of operations. As a result of the adoption of ASC 606, we determined that the control, including the economic benefit, of commodities has passed to us once the raw mix NGLs have been purchased from the customer. Therefore, we now consider the contractually-stated fees to serve as pricing mechanisms that reduce the cost of such commodity purchased upon receipt of the raw mix NGLs, rather than being recorded as midstream services revenue. Upon sale of the NGLs to a third-party customer, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities purchased.

For our crude oil and condensate service contracts in which we purchase the commodity, we utilize a similar approach under ASC 606 as outlined above for NGL contracts. This treatment is consistent with our accounting for crude oil and condensate service contracts prior to the adoption of ASC 606.

For our natural gas gathering and processing contracts in which we perform midstream services and also purchase the natural gas, we accounted for these contracts prior to the adoption of ASC 606 as revenue-generating contracts in which all contractually-stated fees earned for our gathering and processing services were recorded as midstream services revenue on the statements of operations. As a result of the adoption of ASC 606, we must determine if economic control of the commodities has passed from the producer to us before or after we perform our services (if at all). Control is assessed on a contract-by-contract basis by analyzing each contract’s provisions, which can include provisions for: the customer to take its residue gas and/or NGLs in-kind; fixed or actual NGL or keep-whole recovery; commodity purchase prices at weighted average sales price or market index-based pricing; and various other contract-specific considerations. Based on this control assessment, our gathering and processing contracts fall into two primary categories:

• For gathering and processing contracts in which there is a commodity purchase and analysis of the contract provisions indicates that control, including the economic benefit, of the natural gas passes to us when the natural gas is brought into our system, we do not consider these contracts to contain performance obligations for our services. As control of the natural gas passes to us prior to performing our gathering and processing services, we are, in effect, performing our services for our own benefit. Based on this control determination, we consider the contractually-stated fees to serve as pricing mechanisms that reduce the cost of such commodity purchased upon receipt of the natural gas, rather than being recorded as midstream services revenue. Upon sale of the residue gas and/or NGLs to a third-party customer, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities purchased.

• For gathering and processing contracts in which there is a commodity purchase and analysis of the contract provisions indicates that control, including the economic benefit, of the natural gas does not pass to us until after the natural gas has been gathered and processed, we consider these contracts to contain performance obligations for our services. Accordingly, we consider the satisfaction of these performance obligations as revenue-generating, and we recognize the fees received for satisfying these performance obligations as midstream service revenues over time as we satisfy our performance obligations.

For midstream service contracts related to NGL, crude oil, or natural gas gathering and processing in which there is no commodity purchase or control of the commodity never passes to us and we simply earn a fee for our services, we consider these contracts to contain performance obligations for our services. Accordingly, we consider the satisfaction of these performance obligations as revenue-generating, and we recognize the fees received for satisfying these performance obligations as midstream service revenues over time as we satisfy our performance obligations. This treatment is consistent with our accounting for these contracts prior to the adoption of ASC 606.

For our natural gas transmission contracts, we determined that control of the natural gas never transfers to us and we simply earn a fee for our services. Therefore, we recognize these fees as midstream services revenues over time as we satisfy our performance obligations. This treatment is consistent with our accounting for natural gas transmission contracts prior to the adoption of ASC 606.

We also evaluate our commodity marketing contracts, under which we purchase and sell commodities in connection with our gas, NGL, crude, and condensate midstream services, pursuant to ASC 606, including the principal/agent provisions. For contracts in which we possess control of the commodity and act as principal in the purchase and sale of commodities, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities when purchased. For contracts in which we do not possess control of the commodity and are acting as agent, our consolidated statements of operations only reflect midstream services revenues that we earn based on the fees contained in the

13

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

applicable contract. This treatment is consistent with our accounting for our commodity marketing contracts prior to the adoption of ASC 606.

Satisfaction of Performance Obligations and Recognition of Revenue

While ASC 606 alters the line item on which certain amounts are recorded on the consolidated statements of operations, ASC 606 did not significantly affect the timing of income and expense recognition on the consolidated statements of operations. Specifically, for our commodity sales contracts, we satisfy our performance obligations at the point in time at which the commodity transfers from us to the customer. This transfer pattern aligns with our billing methodology. Therefore, we recognize product sales revenue at the time the commodity is delivered and in the amount to which we have the right to invoice the customer, which is consistent with our accounting prior to the adoption of ASC 606. For our midstream service contracts that contain revenue-generating performance obligations, we satisfy our performance obligations over time as we perform the midstream service and as the customer receives the benefit of these services over the term of the contract. As permitted by ASC 606, we are utilizing the practical expedient that allows an entity to recognize revenue in the amount to which the entity has a right to invoice, since we have a right to consideration from our customer in an amount that corresponds directly with the value to the customer of our performance completed to date. Accordingly, we continue to recognize revenue over time as our midstream services are performed. Therefore, ASC 606 does not significantly affect the timing of revenue and expense recognition on our consolidated statements of operations, and no cumulative effect adjustment was made to the balance of equity upon our adoption of ASC 606.

We generally accrue one month of sales and the related natural gas, NGL, condensate, and crude oil purchases and reverse these accruals when the sales and purchases are invoiced and recorded in the subsequent month. Actual results could differ from the accrual estimates. We typically receive payment for invoiced amounts within one month, depending on the terms of the contract. We account for taxes collected from customers attributable to revenue transactions and remitted to government authorities on a net basis (excluded from revenues).

Minimum Volume Commitments and Firm Transportation Contracts

Certain gathering and processing agreements in our Texas, Oklahoma, and Crude and Condensate segments provide for quarterly or annual MVCs, including MVCs from Devon from certain of our Barnett Shale assets in North Texas and our Cana gathering and processing assets in Oklahoma. Under these agreements, our customers or suppliers (as “customers” and “suppliers” are determined per application of ASC 606) agree to ship and/or process a minimum volume of product on our systems over an agreed time period. If a customer or supplier under such an agreement fails to meet its MVC for a specified period, the customer is obligated to pay a contractually-determined fee based upon the shortfall between actual product volumes and the MVC for that period. Some of these agreements also contain make-up right provisions that allow a customer or supplier to utilize gathering or processing fees in excess of the MVC in subsequent periods to offset shortfall amounts in previous periods. We record revenue under MVC contracts during periods of shortfall when it is known that the customer cannot, or will not, make up the deficiency in subsequent periods. Deficiency fee revenue is included in midstream services revenues.

For our firm transportation contracts, we transport commodities owned by others for a stated monthly fee for a specified monthly quantity with an additional fee based on actual volumes. We include transportation fees from firm transportation contracts in our midstream services revenues.

The following table summarizes the expected impact to our consolidated statements of operations, resulting from either revenue or reductions to cost of sales, from MVC and firm transportation contractual provisions. All amounts in the table below reflect the contractually-stated MVC or firm transportation volumes specified for each period multiplied by the relevant deficiency or reservation fee. Actual amounts could differ due to the timing of revenue recognition or reductions to cost of sales resulting from make-up right provisions included in our agreements, as well as due to nonpayment or nonperformance by our customers. In addition, amounts in the table below do not represent the shortfall amounts we expect to collect under our MVC contracts as we generally do not expect volume shortfalls to equal the full amount of the contractual MVCs during these periods.

14

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

2018 (remaining)	$	388.4
2019	235.8
2020	224.8
2021	82.2
2022	71.9
Thereafter	231.2
Total	$	1,234.3

In May 2018, we restructured one of our natural gas gathering and processing contracts that included MVCs that were in effect through 2023. Prior to the contract restructuring, we expected$135.1 million in guaranteed future gross operating margin under the contract, generated from either revenue or reductions to cost of sales resulting from both gathering and processing fees as well as shortfall revenue under the MVCs. As a result of the contract restructuring, all MVC provisions were removed from the contract, and we and the counterparty entered into additional agreements pursuant to which: (i) the counterparty made a$19.7 million payment to us on the date of the contract restructuring to satisfy MVC revenue earned up to the date of the contract restructuring; (ii) the counterparty entered into a second lien secured term loan under which the counterparty will pay us$58.0 millionin principal payments in various installments ending in May 2023, with interest accruing on the loan balance at8.0%per annum beginning in 2020; and (iii) the counterparty granted to us a1.0%term overriding royalty interest through June 2034 in each well located on leasehold interests of the counterparty and connected to the gas gathering system that we operate. As a result of the contract restructuring and in accordance with ASC 606, we recognized$45.5 millionof midstream services revenue, which primarily represents the discounted present value of the second lien secured term loan receivable, in the Oklahoma segment in the second quarter of 2018. Pursuant to the contract restructuring, the terms of the restructured contract, other than the MVCs, are the same as the original contract, and we expect to continue recognizing gathering and processing fees on volumes delivered by the customer.

Contributions in Aid of Construction

The adoption of ASC 606 also alters how we account for contributions in aid of construction (“CIAC”). CIAC payments are lump sum payments from third parties to reimburse us for capital expenditures related to the construction of our operating assets and, in most cases, the connection of these operating assets to the third party’s assets. CIAC payments can be paid to us prior to the commencement of construction activities, during construction, or after construction has been completed. Prior to adoption of ASC 606 and in accordance with ASC 980, Regulated Operations (“ASC 980”), and the FERC Uniform System of Accounts, we reduced the balance of the related property and equipment by the amount of CIAC payments received. In doing so, CIAC payments previously affected the consolidated statements of operations through reduced depreciation expense over the useful lives of the related property and equipment. Upon adoption of ASC 606, we initially recognize CIAC payments received from customers as deferred revenue, which will be subsequently amortized into revenue over the term of the underlying operational contract. For CIAC payments from noncustomers and for payments related to the construction of regulated operating assets, we continue to reduce the balance of the related property and equipment in accordance with ASC 980 and the FERC Uniform System of Accounts. This change in our CIAC accounting policy was not material to our financial statements for thethree and six months ended June 30, 2018.

Disaggregation of Revenue and Presentation of Prior Periods

Based on the disclosure requirements of ASC 606, we are presenting revenues disaggregated based on the type of good or service in order to more fully depict the nature of our revenues. SeeNote 13—Segment Informationfor the revenue disaggregation information included in the segment information table for thethree and six months ended June 30, 2018. As we adopted ASC 606 using the modified retrospective method, only the consolidated statement of operations and revenue disaggregation information for thethree and six months ended June 30, 2018are presented to conform to ASC 606 accounting and disclosure requirements. Prior periods presented in the consolidated financial statements and accompanying notes were not restated in accordance with ASC 606.

(c) Accounting Standards to be Adopted in Future Periods

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842)—Amendments to the FASB Accounting Standards Codification (“ASU 2016-02”), which establishes ASC Topic 842, Leases (“ASC 842”). Under ASC 842, lessees will need to recognize virtually all of their leases on the balance sheet by recording a right-of-use asset and lease liability. Lessor accounting is similar to the current model, but updated to align with certain changes to the lessee model and the new revenue recognition

15

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

standard. Existing sale-leaseback guidance is replaced with a new model applicable to both lessees and lessors. Additional revisions have been made to embedded leases, reassessment requirements, and lease term assessments including variable lease payment, discount rate, and lease incentives. ASC 842 is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those annual periods. Entities are required to adopt ASC 842 using a modified retrospective transition. We will adopt ASC 842 effective January 1, 2019. We are currently assessing the impact of adopting ASC 842 and are in the process of implementing a lease accounting software tool. This assessment includes the evaluation of our current lease contracts and the analysis of contracts that may contain lease components. While we cannot currently estimate the quantitative effect that ASC 842 will have on our consolidated financial statements, the adoption of ASC 842 will increase our asset and liability balances on the consolidated balance sheets due to the required recognition of right-of-use assets and corresponding lease liabilities for all lease obligations that are currently classified as operating leases. In addition, there are industry-specific concerns with the implementation of ASC 842 that will require further evaluation before we are able to fully assess the impact of ASC 842 on our consolidated financial statements.

In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842)—Land Easement Practical Expedient for Transition to Topic 842 (“ASU 2018-01”). ASU 2018-01 amends ASC 842 and provides an optional practical expedient to not evaluate under ASC 842 existing or expired land easements that were not previously accounted for as leases under the current leases guidance in ASC 840, Leases. Under ASU 2018-01, an entity that elects this practical expedient should evaluate new or modified land easements under ASC 842 beginning at the date that the entity adopts ASC 842. We plan to utilize the practical expedient provided in ASU 2018-01 in conjunction with our adoption of ASC 842.

(d)    Property & Equipment

Impairment Review. In accordance with ASC 360, Property, Plant and Equipment, we evaluate long-lived assets of identifiable business activities for potential impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. The carrying amount of a long-lived asset is not recoverable when it exceeds the undiscounted sum of the future cash flows expected to result from the use and eventual disposition of the asset. Estimates of expected future cash flows represent management’s best estimate based on reasonable and supportable assumptions. When the carrying amount of a long-lived asset is not recoverable, an impairment loss is recognized equal to the excess of the asset’s carrying value over its fair value.For thesix months ended June 30, 2017, we recognized impairments of property and equipment of$7.0 million, which related to the carrying values of rights-of-way that we are no longer using and an abandoned brine disposal well. We did not recognize impairments for any other period presented in the consolidated statements of operations.

(3) Intangible Assets

Intangible assets associated with customer relationships are amortized on a straight-line basis over the expected period of benefits of the customer relationships, which range from10 to 20 years.

The following table represents our change in carrying value of intangible assets (in millions):

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Six Months Ended June 30, 2018
Customer relationships, beginning of period	$	1,795.8	$	(298.7	)	$	1,497.1
Amortization expense	—		(61.7		)	(61.7		)
Customer relationships, end of period	$	1,795.8	$	(360.4	)	$	1,435.4

The weighted average amortization period is15.0 years. Amortization expense was $30.9 millionand$35.5 millionfor the three months endedJune 30, 2018and2017, respectively, and$61.7 millionand$65.0 millionfor thesixmonths endedJune 30, 2018and2017, respectively.

16

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

The following table summarizes our estimated aggregate amortization expense for the next five years and thereafter (in millions):

2018 (remaining)	$	61.8
2019	123.4
2020	123.4
2021	123.4
2022	123.4
Thereafter	880.0
Total	$	1,435.4

(4) Related Party Transactions

We engage in various transactions with Devon and other related parties. For the three and six months ended June 30, 2018, Devon accounted for 11.5% and 10.6%of our revenues, respectively, and for thethree and sixmonths endedJune 30, 2017, Devon accounted for15.8%and15.3%of our revenues, respectively. We had an accounts receivable balance related to transactions with Devon of $122.1 million at June 30, 2018 and $102.7 million at December 31, 2017. Additionally, we had an accounts payable balance related to transactions with Devon of $27.0 million at June 30, 2018 and $16.3 million at December 31, 2017.

On July 18, 2018, subsidiaries of Devon sold all of their equity interests in ENLK, ENLC, and the managing member of ENLC to GIP. Accordingly, Devon is no longer an affiliate of ENLK or ENLC. The sale did not affect our commercial arrangements with Devon, except that Devon agreed to extend through 2029 certain existing, fixed-fee gathering and processing contracts related to the Bridgeport plant in North Texas and the Cana plant in Oklahoma. SeeNote 15—Subsequent Eventfor additional information regarding Devon’s sale to GIP.

For thethree and sixmonths endedJune 30, 2018, we recorded cost of sales of$9.5 millionand$22.5 million, respectively, and for thethree and sixmonths endedJune 30, 2017, we recorded cost of sales of$4.3 millionand$5.5 million, respectively, related to our purchase of residue gas and NGLs from the Cedar Cove JV subsequent to processing at our Central Oklahoma processing facilities.We had an accounts receivable balance related to transactions with Cedar Cove of$0.6 million at June 30, 2018. Additionally, we had an accounts payable balance related to transactions with Cedar Cove of$3.5 million at June 30, 2018. The accounts receivable and payable balances related to transactions with Cedar Cover were immaterial atDecember 31, 2017.

Management believes these transactions are executed on terms that are fair and reasonable to us. The amounts related to related party transactions are specified in the accompanying consolidated financial statements.

17

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

(5) Long-Term Debt

As of June 30, 2018 and December 31, 2017, long-term debt consisted of the following (in millions):

	June 30, 2018								December 31, 2017
	Outstanding Principal		Premium (Discount)			Long-Term Debt			Outstanding Principal		Premium (Discount)			Long-Term Debt
ENLK credit facility due 2020 (1)	$	520.0	$	—		$	520.0		$	—	$	—		$	—
ENLC credit facility due 2019 (2)	84.4		—			84.4			74.6		—			74.6
ENLK’s 2.70% Senior unsecured notes due 2019	400.0		(0.1		)	399.9			400.0		(0.1		)	399.9
ENLK’s 4.40% Senior unsecured notes due 2024	550.0		2.0			552.0			550.0		2.2			552.2
ENLK’s 4.15% Senior unsecured notes due 2025	750.0		(0.9		)	749.1			750.0		(1.0		)	749.0
ENLK’s 4.85% Senior unsecured notes due 2026	500.0		(0.6		)	499.4			500.0		(0.6		)	499.4
ENLK’s 5.60% Senior unsecured notes due 2044	350.0		(0.2		)	349.8			350.0		(0.2		)	349.8
ENLK’s 5.05% Senior unsecured notes due 2045	450.0		(6.3		)	443.7			450.0		(6.5		)	443.5
ENLK's 5.45% Senior unsecured notes due 2047	500.0		(0.1		)	499.9			500.0		(0.1		)	499.9
Debt classified as long-term, including current maturities of long-term debt	$	4,104.4	$	(6.2	)	$	4,098.2		$	3,574.6	$	(6.3	)	$	3,568.3
Debt issuance cost (3)						(24.3		)						(26.2		)
Less: Current maturities of long-term debt (4)						(483.7		)						—
Long-term debt, net of unamortized issuance cost						$	3,590.2							$	3,542.1

(1) Bears interest based on Prime and/or LIBOR plus an applicable margin. The effective interest rate was3.6%atJune 30, 2018.

(2) Bears interest based on Prime and/or LIBOR plus an applicable margin. The effective interest rate was 3.9% and 3.2% at June 30, 2018 and December 31, 2017, respectively.

(3) Net of amortization of $14.8 million and $12.9 million at June 30, 2018 and December 31, 2017, respectively.

(4) The outstanding balance, net of debt issuance costs, of the ENLC Credit Facility and ENLK’s2.70%senior unsecured notes as ofJune 30, 2018are classified as “Current maturities of long-term debt” on the consolidated balance sheet as the ENLC Credit Facility matures on March 7, 2019, and ENLK’s 2.70% senior unsecured notes mature on April 1, 2019.

ENLC Credit Facility

The ENLC Credit Facility is a $250.0 million revolving credit facility that matures on March 7, 2019 and includes a $125.0 million letter of credit subfacility. Our obligations under the ENLC Credit Facility are guaranteed by two of our wholly-owned subsidiaries and secured by first priority liens on (i) 88,528,451 ENLK common units and the 100% membership interest in the General Partner indirectly held by us, (ii) the 100% equity interest in each of our wholly-owned subsidiaries held by us, and (iii) any additional equity interests subsequently pledged as collateral under the ENLC Credit Facility.

The ENLC Credit Facility contains certain financial, operational, and legal covenants. The financial covenants are tested on a quarterly basis, based on the rolling four-quarter period that ends on the last day of each fiscal quarter, and include (i) maintaining a maximum consolidated leverage ratio (as defined in the ENLC Credit Facility, but generally computed as the ratio of consolidated funded indebtedness to consolidated earnings before interest, taxes, depreciation, amortization, and certain other non-cash charges) of 4.00 to 1.00, provided that the maximum consolidated leverage ratio is 4.50 to 1.00 during an acquisition period (as defined in the ENLC Credit Facility) and (ii) maintaining a minimum consolidated interest coverage ratio (as defined in the ENLC Credit Facility, but generally computed as the ratio of consolidated earnings before interest, taxes, depreciation, amortization, and certain other non-cash charges to consolidated interest charges) of 2.50 to 1.00 unless an investment grade event (as defined in the ENLC Credit Facility) occurs.

Borrowings under the ENLC Credit Facility bear interest at our option at the Eurodollar Rate (the LIBOR Rate) plus an applicable margin (ranging from 1.75% to 2.50%) or the Base Rate (the highest of the Federal Funds Rate plus 0.50%, the 30-day Eurodollar Rate plus 1.0% or the administrative agent’s prime rate) plus an applicable margin (ranging from 0.75% to 1.50%). The applicable margins vary depending on our leverage ratio. Upon breach by us of certain covenants governing the ENLC Credit Facility, amounts outstanding under the ENLC Credit Facility, if any, may become due and payable immediately and the liens securing the ENLC Credit Facility could be foreclosed upon.

18

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

On June 20, 2018, we amended the change of control provisions of the ENLC Credit Facility to, among other things, designate GIP as Qualifying Owners (as defined in the ENLC Credit Facility). At June 30, 2018, ENLC was in compliance and expects to be in compliance with the covenants in the ENLC Credit Facility through its maturity date.

As of June 30, 2018, there were no outstanding letters of credit and $84.4 million in outstanding borrowings under the ENLC Credit Facility, leaving approximately $165.6 million available for future borrowing.

ENLK Credit Facility

The ENLK Credit Facility is a $1.5 billion unsecured revolving credit facility that matures on March 6, 2020 and includes a $500.0 millionletter of credit subfacility. Under the ENLK Credit Facility, ENLK is permitted to (1) subject to certain conditions and the receipt of additional commitments by one or more lenders, increase the aggregate commitments under the ENLK Credit Facility by an additional amount not to exceed $500.0 millionand (2) subject to certain conditions and the consent of the requisite lenders, ontwo separate occasions extend the maturity date of the ENLK Credit Facility by one yearon each occasion. The ENLK Credit Facility contains certain financial, operational, and legal covenants. Among other things, these covenants include maintaining a ratio of consolidated indebtedness to consolidated EBITDA (which is defined in the ENLK Credit Facility and includes projected EBITDA from certain capital expansion projects) of no more than 5.0 to 1.0. If ENLK consummates one or more acquisitions in which the aggregate purchase price is$50.0 million or more, ENLK can elect to increase the maximum allowed ratio of consolidated indebtedness to consolidated EBITDA to5.5 to 1.0 for the quarter of the acquisition and the three following quarters.

Borrowings under the ENLK Credit Facility bear interest at ENLK’s option at the Eurodollar Rate (the LIBOR Rate) plus an applicable margin (ranging from 1.00% to 1.75%) or the Base Rate (the highest of the Federal Funds Rate plus 0.50%, the 30-day Eurodollar Rate plus1.0%or the administrative agent’s prime rate) plus an applicable margin (ranging from0.0% to 0.75%). The applicable margins vary depending on ENLK’s credit rating. If ENLK breaches certain covenants governing the ENLK Credit Facility, amounts outstanding under the ENLK Credit Facility, if any, may become due and payable immediately.

On June 20, 2018, ENLK amended the change of control provisions of the ENLK Credit Facility to, among other things, designate GIP as Qualifying Owners (as defined in the ENLK Credit Facility). At June 30, 2018, ENLK was in compliance and expects to be in compliance with the covenants in the ENLK Credit Facility for at least the next twelve months.

As of June 30, 2018, there were $9.3 millionin outstanding letters of credit and $520.0 million outstanding borrowings under the ENLK Credit Facility, leaving approximately $970.7 million available for future borrowing.

All other material terms and conditions of the ENLC Credit Facility, the ENLK Credit Facility, and outstanding senior unsecured notes are described in Part II, “Item 8. Financial Statements and Supplementary Data—Note 6” in our Annual Report on Form 10-K for the year ended December 31, 2017.

(6) Income Taxes

Income taxes included on the consolidated financial statements were as follows for the periods presented (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018		2017
Current income tax provision (benefit)	$	(0.3	)	$	(1.0	)	$	0.9	$	(0.2	)
Deferred income tax provision	6.6			4.2			$	12.4	$	6.4
Total income tax provision	$	6.3		$	3.2		$	13.3	$	6.2

19

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

The following schedule reconciles total income tax expense and the amount calculated by applying the statutory U.S. federal tax rate to income before income taxes (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Expected income tax provision based on federal statutory rate (1)	$	7.2		$	3.1		$	11.3		$	3.5
State income taxes expense, net of federal tax benefit	0.8			0.3			1.3			0.3
Income tax expense (benefit) from ENLK	(2.0		)	(0.3		)	(1.0		)	0.2
Unit-based compensation	(0.1		)	—			1.5			2.3
Other	0.4			0.1			0.2			(0.1		)
Total income tax provision	$	6.3		$	3.2		$	13.3		$	6.2

(1) The statutory federal tax rate for corporations was 21% at June 30, 2018 and 35% at June 30, 2017.

(7) Certain Provisions of the Partnership Agreement

(a) Issuance of ENLK Common Units

In August 2017, ENLK entered into the 2017 EDA with UBS Securities LLC, Barclays Capital Inc., BMO Capital Markets Corp., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Jefferies LLC, Mizuho Securities USA LLC, RBC Capital Markets, LLC, SunTrust Robinson Humphrey, Inc. and Wells Fargo Securities, LLC (collectively, the “Sales Agents”) to sell up to$600.0 million in aggregate gross sales of ENLK common units from time to time through an “at the market” equity offering program. ENLK may also sell common units to any Sales Agent as principal for the Sales Agent’s own account at a price agreed upon at the time of sale. ENLK has no obligation to sell any of the common units under the 2017 EDA and may at any time suspend solicitation and offers under the 2017 EDA.

For thesix months ended June 30, 2018, ENLK sold an aggregate of approximately0.1 millioncommon units under the 2017 EDA, generating proceeds of approximately$0.9 million(net of less than$0.1 millionof commissions paid to the Sales Agents). ENLK used the net proceeds for general partnership purposes. As of June 30, 2018, approximately $564.5 millionin aggregate gross proceeds remains available to be issued under the 2017 EDA.

(b) ENLK Series B Preferred Units

Beginning with the quarter ended September 30, 2017, Series B Preferred Unit distributions are payable quarterlyin cash at an amount equal to$0.28125 per Series B Preferred Unit (the “Cash Distribution Component”) plus an in-kind distribution equal to the greater of (A)0.0025Series B Preferred Units per Series B Preferred Unit and (B) an amount equal to (i) the excess, if any, of the distribution that would have been payable had the Series B Preferred Units converted into common units over the Cash Distribution Component, divided by (ii) the issue price of $15.00.

20

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

A summary of the distribution activity relating to the Series B Preferred Units during the six months ended June 30, 2018 and 2017 is provided below:

Declaration period	Distribution paid as additional Series B Preferred Units	Cash Distribution (in millions)		Date paid/payable
2018
Fourth Quarter of 2017	413,658	$	16.0	February 13, 2018
First Quarter of 2018	416,657	$	16.2	May 14, 2018
Second Quarter of 2018	419,678	$	16.3	August 13, 2018
2017
Fourth Quarter of 2016	1,130,131	$	—	February 13, 2017
First Quarter of 2017	1,154,147	$	—	May 12, 2017
Second Quarter of 2017	1,178,672	$	—	August 11, 2017

(c) ENLK Series C Preferred Units

Distributions on the Series C Preferred Units accrue and are cumulative from the date of original issue and payable semi-annually in arrears on the 15^th day of June and December of each year through and including December 15, 2022 and, thereafter, quarterly in arrears on the 15^th day of March, June, September, and December of each year, in each case, if and when declared by the General Partner out of legally available funds for such purpose. The distribution rate for the Series C Preferred Units is6.0%per annum, and ENLK distributed $12.0 million to holders of Series C Preferred Units during thesix months ended June 30, 2018.

(d) ENLK Common Unit Distributions

Unless restricted by the terms of the ENLK Credit Facility and/or the indentures governing ENLK’s senior unsecured notes, ENLK must make distributions of100%of available cash, as defined in its partnership agreement, within 45 daysfollowing the end of each quarter. Distributions of available cash are made to the General Partner in accordance with its current percentage interest with the remainder to the common unitholders, subject to the payment of incentive distributions as described below to the extent that certain target levels of cash distributions are achieved. The General Partner is not entitled to incentive distributions with respect to (i) distributions on theSeries B Preferred Units until such units convert into common units or (ii) the Series C Preferred Units.

The General Partner owns the general partner interest in ENLK and all incentive distribution rights in ENLK. The General Partner is entitled to receive incentive distributions if the amount ENLK distributes with respect to any quarter exceeds levels specified in its partnership agreement. Under the quarterly incentive distribution provisions, the General Partner is entitled to13.0% of amounts ENLK distributes in excess of $0.25 per unit, 23.0% of the amounts ENLK distributes in excess of $0.3125 per unit, and 48.0% of amounts ENLK distributes in excess of $0.375 per unit.

A summary of ENLK’s distribution activity relating to the common units during thesixmonths endedJune 30, 2018 and 2017 is provided below:

Declaration period	Distribution/unit		Date paid/payable
2018
Fourth Quarter of 2017	$	0.39	February 13, 2018
First Quarter of 2018	$	0.39	May 14, 2018
Second Quarter of 2018	$	0.39	August 13, 2018
2017
Fourth Quarter of 2016	$	0.39	February 13, 2017
First Quarter of 2017	$	0.39	May 12, 2017
Second Quarter of 2017	$	0.39	August 11, 2017

21

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

(e) Allocation of ENLK Income

Net income is allocated to the General Partner in an amount equal to its incentive distribution rights as described in section “(d) ENLK Common Unit Distributions” above. The General Partner’s share of net income consists of incentive distribution rights to the extent earned, a deduction for unit-based compensation attributable to ENLC’s restricted units, and the percentage interest of ENLK’s net income adjusted for ENLC’s unit-based compensation specifically allocated to the General Partner. The net income allocated to the General Partner is as follows (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Income allocation for incentive distributions	$	14.8		$	14.6		$	29.6		$	29.3
Unit-based compensation attributable to ENLC’s restricted units	(4.0		)	(3.9		)	(8.4		)	(12.7		)
General Partner share of net income	0.4			0.1			0.6			0.1
General Partner interest in net income	$	11.2		$	10.8		$	21.8		$	16.7

22

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

(8) Members' Equity

(a)Earnings Per Unit and Dilution Computations

As required under ASC 260, Earnings Per Share, unvested share-based payments that entitle employees to receive non-forfeitable distributions are considered participating securities for earnings per unit calculations. The following table reflects the computation of basic and diluted earnings per unit for the periods presented (in millions, except per unit amounts):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
ENLC interest in net income	$	28.0		$	5.9		$	40.4		$	4.0
Distributed earnings allocated to:
Common units (1) (2)	$	48.3		$	46.1		$	95.9		$	92.0
Unvested restricted units (1) (2)	0.8			0.6			1.3			1.2
Total distributed earnings	$	49.1		$	46.7		$	97.2		$	93.2
Undistributed loss allocated to:
Common units	$	(20.8	)	$	(40.3	)	$	(56.1	)	$	(88.1	)
Unvested restricted units	(0.3		)	(0.5		)	(0.7		)	(1.1		)
Total undistributed loss	$	(21.1	)	$	(40.8	)	$	(56.8	)	$	(89.2	)
Net income allocated to:
Common units	$	27.5		$	5.8		$	39.8		$	3.9
Unvested restricted units	0.5			0.1			0.6			0.1
Total net income	$	28.0		$	5.9		$	40.4		$	4.0
Basic and diluted net income per unit:
Basic	$	0.15		$	0.03		$	0.22		$	0.02
Diluted	$	0.15		$	0.03		$	0.22		$	0.02

(1) For the three months ended June 30, 2018 and 2017, distributed earnings represent a declared distribution of $0.267 per unit payable on August 14, 2018 and a distribution of $0.255 per unit paid on August 14, 2017, respectively.

(2) For the six months ended June 30, 2018, distributed earnings included a distribution of $0.263 per unit paid on May 15, 2018 and a declared distribution of $0.267 per unit payable on August 14, 2018. For the six months ended June 30, 2017, distributed earnings included distributions of $0.255 per unit paid on May 15, 2017 and $0.255 per unit paid on August 14, 2017.

The following are the unit amounts used to compute the basic and diluted earnings per unit for the periods presented (in millions):

	Three Months Ended June 30,		Six Months Ended June 30,
	2018	2017	2018	2017
Basic weighted average units outstanding:
Weighted average common units outstanding	181.0	180.6	181.0	180.4
Diluted weighted average units outstanding:
Weighted average basic common units outstanding	181.0	180.6	181.0	180.4
Dilutive effect of non-vested restricted units	1.2	1.1	1.0	1.2
Total weighted average diluted common units outstanding	182.2	181.7	182.0	181.6

All outstanding units were included in the computation of diluted earnings per unit and weighted based on the number of days such units were outstanding during the periods presented.

23

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

(b) Distributions

A summary of our distribution activity relating to the ENLC common units for the six months ended June 30, 2018 and 2017, respectively, is provided below:

Declaration period	Distribution/unit		Date paid/payable
2018
Fourth Quarter of 2017	$	0.259	February 14, 2018
First Quarter of 2018	$	0.263	May 15, 2018
Second Quarter 2018	$	0.267	August 14, 2018
2017
Fourth Quarter of 2016	$	0.255	February 14, 2017
First Quarter of 2017	$	0.255	May 15, 2017
Second Quarter 2017	$	0.255	August 14, 2017

24

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

(9) Investment in Unconsolidated Affiliates

As of June 30, 2018, our unconsolidated investments consisted of a contractual right to the economic benefits and burdens associated with Devon’s 38.75%ownership in GCF and an approximate30% ownership in the Cedar Cove JV.

The following table shows the activity related to our investment in unconsolidated affiliates for the periods indicated (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
GCF
Distributions	$	5.4		$	4.4		$	11.1		$	7.1
Equity in income	$	4.8		$	—		$	9.4		$	4.0
HEP
Equity in loss (1)	$	—		$	—		$	—		$	(3.4	)
Cedar Cove JV
Contributions	$	0.1		$	4.3		$	0.1		$	10.3
Distributions	$	—		$	0.1		$	0.3		$	0.3
Equity in loss	$	(0.4	)	$	(0.1	)	$	(2.0	)	$	—
Total
Contributions	$	0.1		$	4.3		$	0.1		$	10.3
Distributions	$	5.4		$	4.5		$	11.4		$	7.4
Equity in income (loss) (1)	$	4.4		$	(0.1	)	$	7.4		$	0.6

(1) We sold our ownership interest in HEP during the first quarter of 2017, resulting in a loss of$3.4 million for the sixmonths ended June 30, 2017.

The following table shows the balances related to our investment in unconsolidated affiliates as ofJune 30, 2018 and December 31, 2017 (in millions):

	June 30, 2018		December 31, 2017
GCF	$	46.7	$	48.4
Cedar Cove JV	38.8		41.0
Total investment in unconsolidated affiliates	$	85.5	$	89.4

(10) Employee Incentive Plans

(a) Long-Term Incentive Plans

ENLC and ENLK each have similar unit-based compensation payment plans for officers and employees. ENLC grants unit-based awards under the EnLink Midstream, LLC 2014 Long-Term Incentive Plan (the “2014 Plan”), and ENLK grants unit-based awards under the amended and restated EnLink Midstream GP, LLC Long-Term Incentive Plan (the “GP Plan”).

We account for unit-based compensation in accordance with ASC 718, Stock Compensation (“ASC 718”), which requires that compensation related to all unit-based awards be recognized in the consolidated financial statements. Unit-based compensation cost is valued at fair value at the date of grant, and that grant date fair value is recognized as expense over each award’s requisite service period with a corresponding increase to equity or liability based on the terms of each award and the appropriate accounting treatment under ASC 718. Unit-based compensation associated with ENLC’s unit-based compensation

25

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

plan awarded to ENLC’s officers and employees is recorded by us since ENLC has no substantial or managed operating activities other than its interests in ENLK and EOGP.

Amounts recognized on the consolidated financial statements with respect to these plans are as follows (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Cost of unit-based compensation charged to operating expense	$	2.3	$	2.6	$	4.3	$	7.6
Cost of unit-based compensation charged to general and administrative expense	7.3		6.7		10.4		21.1
Total unit-based compensation expense	$	9.6	$	9.3	$	14.7	$	28.7
Non-controlling interest in unit-based compensation	$	3.6	$	3.5	$	5.5	$	10.8
Amount of related income tax benefit recognized in net income (1)	$	1.2	$	2.1	$	1.9	$	6.7

(1) For the three and six months ended June 30, 2018, the amount of related income tax benefit recognized in net income excluded $0.1 million of income tax benefit and $1.5 million of income tax expense, respectively, related to tax deficiencies recorded upon vesting of restricted units. For the six months ended June 30, 2017, the amount of related income tax benefit recognized in net income excluded $2.3 million of income tax expense related to tax deficiencies recorded upon vesting of restricted units. There was no income tax expense or benefit related to tax deficiencies recorded upon vesting of restricted units for the three months ended June 30, 2017.

(b) EnLink Midstream Partners, LP Restricted Incentive Units

ENLK restricted incentive units are valued at their fair value at the date of grant, which is equal to the market value of ENLK common units on such date.A summary of the restricted incentive unit activity for thesix months ended June 30, 2018is provided below:

	Six Months Ended June 30, 2018
EnLink Midstream Partners, LP Restricted Incentive Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	1,980,224			$	15.81
Granted (1)	1,166,464			15.15
Vested (1)(2)	(601,581		)	22.04
Forfeited	(148,572		)	12.29
Non-vested, end of period	2,396,535			$	14.14
Aggregate intrinsic value, end of period (in millions)	$	37.2

(1) Restricted incentive units typically vest at the end of three years. In March 2018, ENLK granted 200,753restricted incentive units with a fair value of$3.0 millionto officers and certain employees as bonus payments for 2017, and these restricted incentive units vested immediately and are included in the restricted incentive units granted and vested line items.

(2) Vested units included189,584units withheld for payroll taxes paid on behalf of employees.

A summary of the restricted incentive units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thethree and six months ended June 30, 2018 and 2017 is provided below (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
EnLink Midstream Partners, LP Restricted Incentive Units:	2018		2017		2018		2017
Aggregate intrinsic value of units vested	$	0.4	$	0.4	$	9.1	$	15.7
Fair value of units vested	$	0.5	$	0.5	$	13.3	$	21.0

26

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

As of June 30, 2018, there was $20.2 million of unrecognized compensation cost related to non-vested ENLK restricted incentive units. That cost is expected to be recognized over a weighted-average period of 1.9 years.

(c) EnLink Midstream Partners, LP Performance Units

The General Partner grants performance awards under the GP Plan. The performance award agreements provide that the vesting of performance units (i.e., performance-based restricted incentive units) granted thereunder is dependent on the achievement of certain total shareholder return (“TSR”) performance goals relative to the TSR achievement of a peer group of companies (the “Peer Companies”) over the applicable performance period. The performance award agreements contemplate that the Peer Companies for an individual performance award (the “Subject Award”) are the companies comprising the AMZ, excluding ENLC and ENLK, on the grant date for the Subject Award. The performance units will vest based on the percentile ranking of the average of ENLC’s and ENLK’s TSR achievement (“EnLink TSR”) for the applicable performance period relative to the TSR achievement of the Peer Companies.

At the end of the vesting period, recipients receive distribution equivalents, if any, with respect to the number of performance units vested. The vesting of units ranges fromzero to 200% of the units granted depending on the EnLink TSR as compared to the TSR of the Peer Companies on the vesting date. The fair value of each performance unit is estimated as of the date of grant using a Monte Carlo simulation with the following assumptions used for all performance unit grants made under the plan: (i) a risk-free interest rate based on United States Treasury rates as of the grant date; (ii) a volatility assumption based on the historical realized price volatility of ENLK’s common units and the designated Peer Companies securities; (iii) an estimated ranking of ENLK among the designated Peer Companies; and (iv) the distribution yield. The fair value of the performance unit on the date of grant is expensed over a vesting period of approximately three years. The following table presents a summary of the grant-date fair value of performance units granted and the related assumptions by performance unit grant date:

EnLink Midstream Partners, LP Performance Units:	March 2018
Beginning TSR price	$	15.44
Risk-free interest rate	2.38		%
Volatility factor	43.85		%
Distribution yield	10.5		%

The following table presents a summary of the performance units:

	Six Months Ended June 30, 2018
EnLink Midstream Partners, LP Performance Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	585,285			$	20.52
Granted	256,345			19.24
Vested (1)	(115,328		)	35.39
Forfeited	(76,351		)	16.62
Non-vested, end of period	649,951			$	17.83
Aggregate intrinsic value, end of period (in millions)	$	10.1

(1) Vested units included34,069units withheld for payroll taxes paid on behalf of employees.

27

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

A summary of the performance units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thesixmonths endedJune 30, 2018is provided below (in millions). No performance units vested for the three months ended June 30, 2018 or for the three and six months ended June 30, 2017.

EnLink Midstream Partners, LP Performance Units:	Six Months Ended June 30, 2018
Aggregate intrinsic value of units vested	$	2.0
Fair value of units vested	$	4.1

As ofJune 30, 2018, there was$7.4 million of unrecognized compensation cost that related to non-vested ENLK performance units. That cost is expected to be recognized over a weighted-average period of 2.0 years.

(d) EnLink Midstream, LLC Restricted Incentive Units

ENLC restricted incentive units are valued at their fair value at the date of grant, which is equal to the market value of ENLC common units on such date.A summary of the restricted incentive unit activity for thesixmonths endedJune 30, 2018is provided below:

	Six Months Ended June 30, 2018
EnLink Midstream, LLC Restricted Incentive Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	1,889,310			$	16.33
Granted (1)	1,059,062			15.67
Vested (1)(2)	(556,262		)	24.24
Forfeited	(138,187		)	12.24
Non-vested, end of period	2,253,923			$	14.32
Aggregate intrinsic value, end of period (in millions)	$	37.1

(1) Restricted incentive units typically vest at the end of three years. In March 2018, ENLC granted194,185restricted incentive units with a fair value of$3.0 million to officers and certain employees as bonus payments for 2017, and these restricted incentive units vested immediately and are included in the restricted incentive units granted and vested line items.

(2) Vested units included178,824units withheld for payroll taxes paid on behalf of employees.

A summary of the restricted incentive units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thethree and six months ended June 30, 2018 and 2017is provided below (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
EnLink Midstream, LLC Restricted Incentive Units:	2018		2017		2018		2017
Aggregate intrinsic value of units vested	$	0.4	$	0.3	$	9.3	$	14.6
Fair value of units vested	$	0.4	$	0.4	$	13.5	$	20.8

As of June 30, 2018, there was $19.2 million of unrecognized compensation cost related to non-vested ENLC restricted incentive units. The cost is expected to be recognized over a weighted-average period of 1.9 years.

28

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

(e) EnLink Midstream, LLC’s Performance Units

ENLC grants performance awards under the 2014 Plan. The performance award agreements provide that the vesting of performance units (i.e., performance-based restricted incentive units) granted thereunder is dependent on the achievement of certain TSR performance goals relative to the TSR achievement of the Peer Companies over the applicable performance period. At the end of the vesting period, recipients receive distribution equivalents, if any, with respect to the number of performance units vested. The vesting of units ranges fromzero to 200%of the units granted depending on the EnLink TSR as compared to the TSR of the Peer Companies on the vesting date. The fair value of each performance unit is estimated as of the date of grant using a Monte Carlo simulation with the following assumptions used for all performance unit grants made under the plan: (i) a risk-free interest rate based on United States Treasury rates as of the grant date; (ii) a volatility assumption based on the historical realized price volatility of ENLC’s common units and the designated Peer Companies securities; (iii) an estimated ranking of ENLC among the designated Peer Companies, and (iv) the distribution yield. The fair value of the performance unit on the date of grant is expensed over a vesting period of approximatelythree years. The following table presents a summary of the grant-date fair value assumptions by performance unit grant date:

EnLink Midstream, LLC Performance Units:	March 2018
Beginning TSR price	$	16.55
Risk-free interest rate	2.38		%
Volatility factor	51.36		%
Distribution yield	6.7		%

The following table presents a summary of the performance units:

	Six Months Ended June 30, 2018
EnLink Midstream, LLC Performance Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	548,839			$	22.14
Granted	223,865			21.63
Vested (1)	(102,555		)	40.48
Forfeited	(70,918		)	17.75
Non-vested, end of period	599,231			$	19.33
Aggregate intrinsic value, end of period (in millions)	$	9.9

(1) Vested units included28,846units withheld for payroll taxes paid on behalf of employees.

A summary of the performance units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thesixmonths endedJune 30, 2018is provided below (in millions). No performance units vested for the three months ended June 30, 2018 or for the three and six months ended June 30, 2017.

EnLink Midstream, LLC Performance Units:	Six Months Ended June 30, 2018
Aggregate intrinsic value of units vested	$	1.9
Fair value of units vested	$	4.2

As of June 30, 2018, there was $7.5 million of unrecognized compensation cost that related to non-vested ENLC performance units. That cost is expected to be recognized over a weighted-average period of 2.0 years.

29

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

(11) Derivatives

Interest Rate Swaps

We periodically enter into interest rate swaps in connection with new debt issuances. During the debt issuance process, we are exposed to variability in future long-term debt interest payments that may result from changes in the benchmark interest rate (commonly the U.S. Treasury yield) prior to the debt being issued. In order to hedge this variability, we enter into interest rate swaps to effectively lock in the benchmark interest rate at the inception of the swap. Prior to 2017, we did not designate interest rate swaps as hedges and, therefore, included the associated settlement gains and losses as interest expense, net of interest income on the consolidated statements of operations.

In May 2017, we entered into an interest rate swap in connection with the issuance of ENLK’s 5.45% senior unsecured notes due 2047 (the “2047 Notes”). In accordance with ASC 815, we designated this swap as a cash flow hedge. Upon settlement of the interest rate swap in May 2017, we recorded the associated $2.2 million settlement loss in accumulated comprehensive loss on the consolidated balance sheets. We will amortize the settlement loss into interest expense on the consolidated statements of operations over the term of the 2047 Notes. There was no ineffectiveness related to the hedge. For the three and six months ended June 30, 2018, we amortized an immaterial amount of the settlement loss into interest expense from accumulated other comprehensive income (loss). We expect to recognize$0.1 millionof interest expense out of accumulated other comprehensive income (loss) over the next twelve months. We have no open interest rate swap position as of June 30, 2018.

Commodity Swaps

We manage our exposure to changes in commodity prices by hedging the impact of market fluctuations. Commodity swaps are used both to manage and hedge price and location risk related to these market exposures and to manage margins on offsetting fixed-price purchase or sale commitments for physical quantities of crude, condensate, natural gas, and NGLs. We do not designate commodity swaps as cash flow or fair value hedges for hedge accounting treatment under ASC 815. Therefore, changes in the fair value of our derivatives are recorded in revenue in the period incurred. In addition, our risk management policy does not allow us to take speculative positions with our derivative contracts.

We commonly enter into index (float-for-float) or fixed-for-float swaps in order to mitigate our cash flow exposure to fluctuations in the future prices of natural gas, NGLs, and crude oil. For natural gas, index swaps are used to protect against the price exposure of daily priced gas versus first-of-month priced gas. They are also used to hedge the basis location price risk resulting from supply and markets being priced on different indices. For natural gas, NGLs, condensate, and crude oil, fixed-for-float swaps are used to protect cash flows against price fluctuations: (1) where we receive a percentage of liquids as a fee for processing third-party gas or where we receive a portion of the proceeds of the sales of natural gas and liquids as a fee, (2) in the natural gas processing and fractionation components of our business and (3) where we are mitigating the price risk for product held in inventory or storage.

Assets and liabilities related to our derivative contracts are included in the fair value of derivative assets and liabilities, and the change in fair value of these contracts is recorded net as a gain (loss) on derivative activity on the consolidated statements of operations. We estimate the fair value of all of our derivative contracts based upon actively-quoted prices of the underlying commodities.

The components of gain (loss) on derivative activity in the consolidated statements of operations related to commodity swaps are (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Change in fair value of derivatives	$	(10.5	)	$	1.8		$	(14.0	)	$	7.1
Realized loss on derivatives	(4.7		)	(0.2		)	(0.7		)	(2.7		)
Gain (loss) on derivative activity	$	(15.2	)	$	1.6		$	(14.7	)	$	4.4

30

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

The fair value of derivative assets and liabilities related to commodity swaps are as follows (in millions):

	June 30, 2018			December 31, 2017
Fair value of derivative assets—current	$	4.0		$	6.8
Fair value of derivative liabilities—current	(10.7		)	(8.4		)
Fair value of derivative liabilities—long-term	(8.9		)	—
Net fair value of derivatives	$	(15.6	)	$	(1.6	)

As of June 30, 2018 and December 31, 2017, there were no derivative assets classified as long-term on the consolidated balance sheets.

Set forth below are the summarized notional volumes and fair values of all instruments held for price risk management purposes and related physical offsets atJune 30, 2018(in millions). The remaining term of the contracts extend no later than October 2019.

		June 30, 2018
Commodity	Instruments	Unit	Volume		Fair Value
NGL (short contracts)	Swaps	Gallons	(46.9	)	$	(7.3	)
NGL (long contracts)	Swaps	Gallons	17.9		0.5
Natural Gas (short contracts)	Swaps	MMBtu	(9.7	)	1.4
Natural Gas (long contracts)	Swaps	MMBtu	7.5		(2.4		)
Crude and condensate (short contracts)	Swaps	MMbbls	(8.8	)	(12.1		)
Crude and condensate (long contracts)	Swaps	MMbbls	1.1		4.3
Total fair value of derivatives					$	(15.6	)

On all transactions where we are exposed to counterparty risk, we analyze the counterparty’s financial condition prior to entering into an agreement, establish limits, and monitor the appropriateness of these limits on an ongoing basis. We primarily deal with financial institutions when entering into financial derivatives on commodities. We have entered into Master ISDAs that allow for netting of swap contract receivables and payables in the event of default by either party. If our counterparties failed to perform under existing swap contracts, the maximum loss on our gross receivable position of$8.3 million as of June 30, 2018 would be reduced toan immaterial amountdue to the offsetting of gross fair value payables against gross fair value receivables as allowed by the ISDAs.

(12) Fair Value Measurements

ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), sets forth a framework for measuring fair value and required disclosures about fair value measurements of assets and liabilities. Fair value under ASC 820 is defined as the price at which an asset could be exchanged in a current transaction between knowledgeable, willing parties. A liability’s fair value is defined as the amount that would be paid to transfer the liability to a new obligor, not the amount that would be paid to settle the liability with the creditor. Where available, fair value is based on observable market prices or parameters or derived from such prices or parameters. Where observable prices or inputs are not available, use of unobservable prices or inputs are used to estimate the current fair value, often using an internal valuation model. These valuation techniques involve some level of management estimation and judgment, the degree of which is dependent on the item being valued.

ASC 820 established a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

Our derivative contracts primarily consist of commodity swap contracts, which are not traded on a public exchange. The fair values of commodity swap contracts are determined using discounted cash flow techniques. The techniques incorporate Level 1 and Level 2 inputs for future commodity prices that are readily available in public markets or can be derived from information available in publicly-quoted markets. These market inputs are utilized in the discounted cash flow calculation considering the instrument’s term, notional amount, discount rate, and credit risk and are classified as Level 2 in hierarchy.

31

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

Net assets (liabilities) measured at fair value on a recurring basis are summarized below (in millions):

	Level 2
	June 30, 2018			December 31, 2017
Commodity Swaps (1)	$	(15.6	)	$	(1.6	)

(1) The fair values of derivative contracts included in assets or liabilities for risk management activities represent the amount at which the instruments could be exchanged in a current arms-length transaction adjusted for our credit risk and/or the counterparty credit risk as required under ASC 820.

Fair Value of Financial Instruments

The estimated fair value of our financial instruments has been determined using available market information and valuation methodologies.Considerable judgment is required to develop the estimates of fair value; thus, the estimates provided below are not necessarily indicative of the amount we could realize upon the sale or refinancing of such financial instruments (in millions):

	June 30, 2018				December 31, 2017
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including current maturities of long-term debt (1)	$	4,073.9	$	3,795.2	$	3,542.1	$	3,650.2
Installment Payables	$	—	$	—	$	249.5	$	249.6
Obligations under capital lease	$	3.3	$	2.8	$	4.1	$	3.4
Secured term loan receivable	$	48.5	$	48.5	$	—	$	—

(1) The carrying value of long-term debt, including current maturities of long-term debt, is reduced by debt issuance costs of$24.3 million and $26.2 million at June 30, 2018 and December 31, 2017, respectively. The respective fair values do not factor in debt issuance costs.

The carrying amounts of our cash and cash equivalents, accounts receivable, and accounts payable approximate fair value due to the short-term maturities of these assets and liabilities.

ENLK had $520.0 million of outstanding borrowings under the ENLK Credit Facility as of June 30, 2018 and no outstanding borrowings under the ENLK Credit Facility as of December 31, 2017. ENLC had $84.4 million and $74.6 million in outstanding borrowings under the ENLC Credit Facility as of June 30, 2018 and December 31, 2017, respectively. As borrowings under the ENLK Credit Facility and ENLC Credit Facility accrue interest under floating interest rate structures, the carrying value of such indebtedness approximates fair value for the amounts outstanding under the ENLK Credit Facility and the ENLC Credit Facility. As of June 30, 2018 and December 31, 2017, ENLK had total borrowings under senior unsecured notes of$3.5 billion maturing between 2019 and 2047 with fixed interest rates ranging from2.7% to 5.6%. The fair values of all senior unsecured notes and installment payables as ofJune 30, 2018 and December 31, 2017were based on Level 2 inputs from third-party market quotations. The fair values of obligations under capital leases and the secured term loan receivable were calculated using Level 2 inputs from third-party banks.

(13) Segment Information

Identification of the majority of our operating segments is based principally upon geographic regions served and the nature of operating activity. Our reportable segments consist of the following: natural gas gathering, processing, transmission, and fractionation operations located in North Texas and the Permian Basin primarily in West Texas (“Texas”), natural gas pipelines, processing plants, storage facilities, NGL pipelines, and fractionation assets in Louisiana (“Louisiana”), natural gas gathering and processing operations located throughout Oklahoma (“Oklahoma”), and crude rail, truck, pipeline, and barge facilities in West Texas, South Texas, Louisiana, Oklahoma, and the Ohio River Valley (“Crude and Condensate”). Operating activity for intersegment eliminations is shown in the Corporate segment. Our sales are derived from external domestic customers. We evaluate the performance of our operating segments based on segment profits.

Corporate assets consist primarily of cash, property, and equipment, including software, for general corporate support, debt financing costs, and unconsolidated affiliate investments in GCF and the Cedar Cove JV.

32

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

Based on the disclosure requirements of ASC 606, we are presenting revenues disaggregated based on the type of good or service in order to more fully depict the nature of our revenues. As we adopted ASC 606 using the modified retrospective method, only the consolidated statement of operations and revenue disaggregation information for thethree and six months ended June 30, 2018are presented to conform to ASC 606 accounting and disclosure requirements. Prior periods presented in the consolidated financial statements and accompanying notes were not restated in accordance with ASC 606.

33

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

Summarized financial information for our reportable segments is shown in the following tables (in millions):

	Texas			Louisiana			Oklahoma			Crude and Condensate			Corporate			Totals
Three Months Ended June 30, 2018
Natural gas sales	$	56.8		$	122.7		$	37.9		$	—		$	—		$	217.4
NGL sales	—			627.9			3.6			0.3			—			631.8
Crude oil and condensate sales	—			0.1			—			585.8			—			585.9
Product sales	56.8			750.7			41.5			586.1			—			1,435.1
Natural gas sales—related parties	—			—			1.9			—			—			1.9
NGL sales—related parties	134.3			28.9			140.4			—			(278.6		)	25.0
Crude oil and condensate sales—related parties	15.1			0.1			23.6			1.7			(40.2		)	0.3
Product sales—related parties	149.4			29.0			165.9			1.7			(318.8		)	27.2
Gathering and transportation	13.5			16.7			25.6			0.9			—			56.7
Processing	9.5			1.1			47.4			—			—			58.0
NGL services	—			10.3			—			—			—			10.3
Crude services	—			—			(0.1		)	15.1			—			15.0
Other services	2.2			0.2			—			—			—			2.4
Midstream services	25.2			28.3			72.9			16.0			—			142.4
Gathering and transportation—related parties	61.4			—			38.7			—			—			100.1
Processing—related parties	46.8			—			23.1			—			—			69.9
Crude services—related parties	—			—			0.7			4.3			—			5.0
Other services—related parties	0.2			—			—			—			—			0.2
Midstream services—related parties	108.4			—			62.5			4.3			—			175.2
Revenue from contracts with customers	339.8			808.0			342.8			608.1			(318.8		)	1,779.9
Cost of sales	(178.7		)	(723.0		)	(170.3		)	(572.4		)	318.8			(1,325.6		)
Operating expenses	(45.8		)	(28.0		)	(20.8		)	(18.8		)	—			(113.4		)
Loss on derivative activity	—			—			—			—			(15.2		)	(15.2		)
Segment profit (loss)	$	115.3		$	57.0		$	151.7		$	16.9		$	(15.2	)	$	325.7
Depreciation and amortization	$	(53.4	)	$	(30.5	)	$	(46.4	)	$	(12.7	)	$	(2.3	)	$	(145.3	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	44.7		$	16.6		$	121.0		$	34.9		$	1.0		$	218.2
Three Months Ended June 30, 2017
Product sales	$	74.6		$	548.7		$	27.7		$	276.2		$	—		$	927.2
Product sales—related parties	115.5			5.4			62.4			—			(154.0		)	29.3
Midstream services	28.2			56.3			33.0			14.4			—			131.9
Midstream services—related parties	107.2			35.3			59.4			5.3			(33.6		)	173.6
Cost of sales	(177.0		)	(575.7		)	(99.0		)	(268.3		)	187.6			(932.4		)
Operating expenses	(42.9		)	(24.6		)	(14.7		)	(20.4		)	—			(102.6		)
Gain on derivative activity	—			—			—			—			1.6			1.6
Segment profit	$	105.6		$	45.4		$	68.8		$	7.2		$	1.6		$	228.6
Depreciation and amortization	$	(59.6	)	$	(29.4	)	$	(38.6	)	$	(12.6	)	$	(2.3	)	$	(142.5	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	39.7		$	15.6		$	135.0		$	13.7		$	14.5		$	218.5

34

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

	Texas			Louisiana			Oklahoma			Crude and Condensate			Corporate			Totals
Six Months Ended June 30, 2018
Natural gas sales	$	139.8		$	247.7		$	86.0		$	—		$	—		$	473.5
NGL sales	—			1,236.3			5.5			0.8			—			1,242.6
Crude oil and condensate sales	—			0.1			—			1,218.1			—			1,218.2
Product sales	139.8			1,484.1			91.5			1,218.9			—			2,934.3
Natural gas sales—related parties	—			—			2.4			—			—			2.4
NGL sales—related parties	227.3			34.5			240.5			—			(474.9		)	27.4
Crude oil and condensate sales—related parties	26.0			0.2			45.9			1.8			(72.9		)	1.0
Product sales—related parties	253.3			34.7			288.8			1.8			(547.8		)	30.8
Gathering and transportation	26.7			34.3			41.2			1.7			—			103.9
Processing	13.3			1.7			56.4			—			—			71.4
NGL services	—			26.9			—			—			—			26.9
Crude services	—			—			—			27.9			—			27.9
Other services	4.0			0.4			—			0.1			—			4.5
Midstream services	44.0			63.3			97.6			29.7			—			234.6
Gathering and transportation—related parties	114.0			—			73.4			—			—			187.4
Processing—related parties	98.4			—			45.2			—			—			143.6
Crude services—related parties	—			—			1.4			8.6			—			10.0
Other services—related parties	0.4			—			—			—			—			0.4
Midstream services—related parties	212.8			—			120.0			8.6			—			341.4
Revenue from contracts with customers	649.9			1,582.1			597.9			1,259.0			(547.8		)	3,541.1
Cost of sales	(340.2		)	(1,409.7		)	(309.3		)	(1,195.7		)	547.8			(2,707.1		)
Operating expenses	(90.0		)	(53.6		)	(41.5		)	(37.5		)	—			(222.6		)
Loss on derivative activity	—			—			—			—			(14.7		)	(14.7		)
Segment profit (loss)	$	219.7		$	118.8		$	247.1		$	25.8		$	(14.7	)	$	596.7
Depreciation and amortization	$	(105.9	)	$	(59.7	)	$	(88.5	)	$	(25.1	)	$	(4.2	)	$	(283.4	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	110.0		$	23.4		$	219.5		$	44.2		$	2.3		$	399.4
Six Months Ended June 30, 2017
Product sales	$	159.7		$	1,093.2		$	42.2		$	622.1		$	—		$	1,917.2
Product sales—related parties	222.0			15.6			126.8			0.8			(293.2		)	72.0
Midstream services	56.0			109.4			60.9			33.0			—			259.3
Midstream services—related parties	212.3			64.3			108.8			8.6			(61.4		)	332.6
Cost of sales	(356.2		)	(1,140.4		)	(187.7		)	(605.0		)	354.6			(1,934.7		)
Operating expenses	(86.8		)	(50.0		)	(28.8		)	(41.1		)	—			(206.7		)
Gain on derivative activity	—			—			—			—			4.4			4.4
Segment profit	$	207.0		$	92.1		$	122.2		$	18.4		$	4.4		$	444.1
Depreciation and amortization	$	(109.4	)	$	(57.5	)	$	(75.1	)	$	(24.1	)	$	(4.7	)	$	(270.8	)
Impairments	$	—		$	—		$	—		$	(7.0	)	$	—		$	(7.0	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	68.0		$	48.3		$	275.7		$	51.1		$	23.5		$	466.6

35

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

The table below represents information about segment assets as ofJune 30, 2018 and December 31, 2017 (in millions):

Segment Identifiable Assets:	June 30, 2018		December 31, 2017
Texas	$	3,139.3	$	3,094.8
Louisiana	2,391.1		2,408.5
Oklahoma	2,993.8		2,836.7
Crude and Condensate	1,005.0		929.5
Corporate	1,254.4		1,268.3
Total identifiable assets	$	10,783.6	$	10,537.8

The following table reconciles the segment profits reported above to the operating income as reported on the consolidated statements of operations (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Segment profit	$	325.7		$	228.6		$	596.7		$	444.1
General and administrative expenses	(30.4		)	(31.1		)	(57.9		)	(67.2		)
Gain (loss) on disposition of assets	(1.2		)	5.4			(1.3		)	0.3
Depreciation and amortization	(145.3		)	(142.5		)	(283.4		)	(270.8		)
Impairments	—			—			—			(7.0		)
Gain on litigation settlement	—			8.5			—			26.0
Operating income	$	148.8		$	68.9		$	254.1		$	125.4

(14) Other Information

The following tables present additional detail for other current assets and other current liabilities, which consists of the following (in millions):

Other Current Assets:	June 30, 2018		December 31, 2017
Natural gas and NGLs inventory	$	60.8	$	30.1
Secured term loan receivable from contract restructuring, net of discount of $1.6	17.9		—
Prepaid expenses and other	20.4		11.1
Natural gas and NGLs inventory, prepaid expenses, and other	$	99.1	$	41.2

Other Current Liabilities:	June 30, 2018		December 31, 2017
Accrued interest	$	36.6	$	35.6
Accrued wages and benefits, including taxes	18.0		30.4
Accrued ad valorem taxes	25.9		27.8
Capital expenditure accruals	41.8		48.8
Onerous performance obligations	17.9		15.2
Other	66.2		65.1
Other current liabilities	$	206.4	$	222.9

36

ENLINK MIDSTREAM, LLC

Notes to Consolidated Financial Statements (Continued)

(Unaudited)

(15) Subsequent Event

On July 18, 2018, subsidiaries of Devon closed a transaction to sell all of their equity interests in ENLK, ENLC, and the managing member of ENLC to GIP. In connection with the closing of the transaction, GIP paid aggregate consideration of$3.125 billion in cash to Devon. As a result of the transaction:

• GIP, through GIP Stetson I, L.P., acquired all of the equity interests held by subsidiaries of Devon in ENLK and the managing member of ENLC, which amount to100%of the outstanding limited liability company interests in the managing member of ENLC and approximately23.1%of the outstanding limited partner interests in ENLK. Through this ownership, GIP acquired control of the managing member of ENLC and ENLC, and, as a result of ENLC’s indirect ownership of ENLK’s general partner, GIP has the ability to control ENLK; and

• GIP, through GIP Stetson II, L.P., acquired all of the equity interests held by subsidiaries of Devon in ENLC, which amount to approximately63.8%of the outstanding limited liability company interests in ENLC.

37

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Please read the following discussion of our financial condition and results of operations in conjunction with the financial statements and notes thereto included elsewhere in this report. In addition, please refer to the Definitions page set forth in this report prior to Part I—Financial Information.

In this report, the terms “Company” or “Registrant,” as well as the terms “ENLC,” “our,” “we,” “us,” or like terms, are sometimes used as abbreviated references to EnLink Midstream, LLC itself or EnLink Midstream, LLC together with its consolidated subsidiaries, including ENLK and its consolidated subsidiaries. References in this report to “EnLink Midstream Partners, LP,” the “Partnership,” “ENLK” or like terms refer to EnLink Midstream Partners, LP itself or EnLink Midstream Partners, LP together with its consolidated subsidiaries, including the Operating Partnership and EOGP.

Overview

We are a Delaware limited liability company formed in October 2013. Our assets consist of equity interests in ENLK and EOGP. ENLK is a publicly traded limited partnership engaged in the gathering, transmission, processing, and marketing of natural gas, NGLs, condensate, and crude oil, as well as providing crude oil, condensate, and brine services to producers. EOGP is a partnership held by us and ENLK and is engaged in the gathering and processing of natural gas. As ofJune 30, 2018, our direct and indirect interests in ENLK and EOGP consisted of the following:

• 88,528,451common units representing an aggregate21.6%limited partner interest in ENLK;

• 100.0%ownership interest in the General Partner of ENLK, which owns a0.4%general partner interest and all of the incentive distribution rights in ENLK; and

• 16.1%limited partner interest in EOGP

Each of ENLK and EOGP is required by its partnership agreement to distribute all its cash on hand at the end of each quarter, less reserves established by their respective general partners in their sole discretion to provide for the proper conduct of ENLK’s or EOGP’s business, as applicable, or to provide for future distributions.

The incentive distribution rights in ENLK entitle us to receive an increasing percentage of cash distributed by ENLK as certain target distribution levels are reached. Specifically, they entitle us to receive 13.0% of all cash distributed in a quarter after each common unit has received $0.25 for that quarter, 23.0% of all cash distributed after each common unit has received $0.3125 for that quarter, and 48.0% of all cash distributed after each common unit has received $0.375 for that quarter.

Since we control the General Partner interest in ENLK, we reflect our ownership interest in ENLK on a consolidated basis, which means that our financial results are combined with ENLK’s financial results and the results of our other subsidiaries. Our consolidated results of operations are derived from the results of operations of ENLK and also include our deferred taxes, interest of non-controlling partners in ENLK’s net income, interest income (expense), and general and administrative expenses not reflected in ENLK’s results of operations. Accordingly, the discussion of our financial position and results of operations in this “Management’s Discussion and Analysis of Financial Condition and Results of Operations” primarily reflects the operating activities and results of operations of ENLK.

We primarily focus on providing midstream energy services, including:

• gathering, compressing, treating, processing, transporting, storing, and selling natural gas;

• fractionating, transporting, storing, and selling NGLs; and

• gathering, transporting, stabilizing, storing, trans-loading, and selling crude oil and condensate, in addition to brine disposal services.

Our midstream energy asset network includes approximately 11,000 miles of pipelines, 20 natural gas processing plants with approximately 4.8 Bcf/d of processing capacity, seven fractionators with approximately 260,000 Bbls/d of fractionation capacity, barge and rail terminals, product storage facilities, purchasing and marketing capabilities, brine disposal wells, a crude oil trucking fleet, and equity investments in certain joint ventures. We manage and report our activities primarily according to the nature of activity and geography. We have five reportable segments:

• Texas Segment. The Texas segment includes our natural gas gathering, processing, and transmission operations in North Texas and the Permian Basin primarily in West Texas;

38

• Oklahoma Segment. The Oklahoma segment includes our natural gas gathering, processing, and transmission activities in the Cana-Woodford, Arkoma-Woodford, Northern Oklahoma Woodford, STACK, and CNOW areas;

• Louisiana Segment. The Louisiana segment includes our natural gas pipelines, natural gas processing plants, storage facilities, fractionation facilities, and NGL assets located in Louisiana;

• Crude and Condensate Segment. The Crude and Condensate segment includes our ORV crude oil, condensate, condensate stabilization, natural gas compression, and brine disposal activities in the Utica and Marcellus Shales, our crude oil operations in the Permian Basin and Central Oklahoma, and our crude oil activities associated with VEX located in the Eagle Ford Shale; and

• Corporate Segment. The Corporate segment includes our unconsolidated affiliate investments in the Cedar Cove JV in Oklahoma, our ownership interest in GCF in South Texas, and our general corporate property, goodwill, and expenses.

We manage our operations by focusing on gross operating margin because our business is generally to gather, process, transport, or market natural gas, NGLs, crude oil, and condensate using our assets for a fee. We earn our fees through various fee-based contractual arrangements, which include stated fee-only contract arrangements or arrangements with fee-based components where we purchase and resell commodities in connection with providing the related service and earn a net margin as our fee. We earn our net margin under our purchase and resell contract arrangements primarily as a result of stated service-related fees that are deducted from the price of the commodity purchase. While our transactions vary in form, the essential element of most of our transactions is the use of our assets to transport a product or provide a processed product to an end-user or marketer at the tailgate of the plant, pipeline, or barge, truck, or rail terminal. We define gross operating margin as operating revenue minus cost of sales. Gross operating margin is a non-GAAP financial measure and is explained in greater detail under “Non-GAAP Financial Measures” below. Approximately 93% of our gross operating margin was derived from fee-based contractual arrangements with minimal direct commodity price exposure for the six months ended June 30, 2018. We reflect revenue as “Product sales” and “Midstream services” on the consolidated statements of operations.

Devon is one of our primary customers. For thethree and six months ended June 30, 2018, approximately 37.7% and 38.3%of our gross operating margin, respectively, was attributable to commercial contracts with Devon.

We generate revenues from eight primary sources:

• gathering and transporting natural gas, NGLs, and crude oil on the pipeline systems we own;

• processing natural gas at our processing plants;

• fractionating and marketing recovered NGLs;

• providing compression services;

• providing crude oil and condensate transportation and terminal services;

• providing condensate stabilization services;

• providing brine disposal services; and

• providing natural gas, crude oil, and NGL storage.

Our gross operating margins are determined primarily by the volumes of:

• natural gas gathered, transported, purchased, and sold through our pipeline systems;

• natural gas processed at our processing facilities;

• NGLs handled at our fractionation facilities or transported through our pipeline systems;

• crude oil and condensate handled at our crude terminals;

• crude oil and condensate gathered, transported, purchased, and sold;

• condensate stabilized;

• brine disposed; and

• natural gas, crude oil, and NGLs stored.

We gather, transport, or store gas owned by others under fee-only contract arrangements based either on the volume of gas gathered, transported, or stored or, for firm transportation arrangements, a stated monthly fee for a specified monthly quantity with an additional fee based on actual volumes. We also buy natural gas from producers or shippers at a market index less a fee-based deduction subtracted from the purchase price of the natural gas. We then gather or transport the natural gas and sell the natural gas at a market index, thereby earning a margin through the fee-based deduction. We attempt to execute substantially all purchases and sales concurrently, or we enter into a future delivery obligation, thereby establishing the basis for the fee we will receive for each natural gas transaction. We are also party to certain long-term gas sales commitments that

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we satisfy through supplies purchased under long-term gas purchase agreements. When we enter into those arrangements, our sales obligations generally match our purchase obligations. However, over time, the supplies that we have under contract may decline due to reduced drilling or other causes, and we may be required to satisfy the sales obligations by buying additional gas at prices that may exceed the prices received under the sales commitments. In our purchase/sale transactions, the resale price is generally based on the same index at which the gas was purchased.

On occasion we have entered into certain purchase/sale transactions in which the purchase price is based on a production-area index and the sales price is based on a market-area index, and we capture the difference in the indices (also referred to as “basis spread”), less the transportation expenses from the two areas, as our fee. Changes in the basis spread can increase or decrease our margins or potentially result in losses. For example, we are a party to one contract associated with our North Texas operations with a term ending June 2019 that requires us to supply approximately 150,000 MMBtu/d of gas. We buy gas for this contract on several different production-area indices and sell the gas into a different market-area index. We realize a cash loss on the delivery of gas under this contract each month based on current prices. The fair value of this performance obligation was recorded based on forecasted discounted cash obligations in excess of market prices under this gas delivery contract. As of June 30, 2018, the balance sheet reflects a liability of $17.9 million related to this performance obligation. Unfavorable basis spreads in recent periods have increased the losses on this contract, and greater losses on this contract could occur in future periods if these conditions persist or become worse.

We typically buy mixed NGLs from our suppliers to our gas processing plants at a fixed discount to market indices for the component NGLs with a deduction for our fractionation fee. We subsequently sell the fractionated NGL products based on the same index-based prices. To a lesser extent, we transport and fractionate or store NGLs owned by others for a fee based on the volume of NGLs transported and fractionated or stored. The operating results of our NGL fractionation business are largely dependent upon the volume of mixed NGLs fractionated and the level of fractionation fees charged. With our fractionation business, we also have the opportunity for product upgrades for each of the discrete NGL products. We realize higher gross operating margins from product upgrades during periods with higher NGL prices.

We gather or transport crude oil and condensate owned by others by rail, truck, pipeline, and barge facilities under fee-only contract arrangements based on volumes gathered or transported. We also buy crude oil and condensate from producers at a market index less a stated deduction, then transport and resell the crude oil and condensate at the same market index. We execute substantially all purchases and sales concurrently, thereby establishing the net margin we will receive for each crude oil and condensate transaction.

We realize gross operating margins from our gathering and processing services primarily through different contractual arrangements: processing margin (“margin”) contracts, POL contracts, POP contracts, fixed-fee component contracts, or a combination of these contractual arrangements. “See Item 3. Quantitative and Qualitative Disclosures about Market Risk—Commodity Price Risk” for a detailed description of these contractual arrangements. Under any of these gathering and processing arrangements, we may only earn a fee for the services performed, or we may buy and resell the gas and/or NGLs as part of the processing arrangement and realize a net margin as our fee. Under margin contract arrangements, our gross operating margins are higher during periods of high NGL prices relative to natural gas prices. Gross operating margin results under POL contracts are impacted only by the value of the liquids produced with margins higher during periods of higher liquids prices. Gross operating margin results under POP contracts are impacted only by the value of the natural gas and liquids produced with margins higher during periods of higher natural gas and liquids prices. Under fixed-fee based contracts, our gross operating margins are driven by throughput volume.

Operating expenses are costs directly associated with the operations of a particular asset. Among the most significant of these costs are those associated with direct labor and supervision, property insurance, property taxes, repair and maintenance expenses, contract services, and utilities. These costs are normally fairly stable across broad volume ranges and therefore do not normally increase or decrease significantly in the short term with increases or decreases in the volume of gas, liquids, crude oil, and condensate moved through or by our assets.

Recent Developments

Strategic Partner Update.Prior to July 18, 2018, subsidiaries of Devon collectively owned a100%equity interest in ENLC’s managing member, common units of ENLC representing approximately63.8%of the outstanding limited liability company interests in ENLC, and approximately23.1%of the outstanding limited partner interests in ENLK. On July 18, 2018, the Devon subsidiaries sold all of these interests to GIP. See “Item 1. Financial Statements—Note 15” for more information regarding this transaction.

Avenger Crude Oil Gathering System. We are constructing a new crude oil gathering system in the Northern Delaware Basin called the Avenger crude oil gathering system (“Avenger”). Avenger is wholly owned by ENLK and supported by a long-

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term contract with Devon on dedicated acreage in their Todd and Potato Basin development areas in Eddy and Lea counties in New Mexico. We expect to commence initial operations on Avenger during the third quarter of 2018 and begin full-service operations during the first quarter of 2019.

Central Oklahoma Plants. In December 2017, we commenced construction on an additional 200 MMcf/d gas processing plant, referred to as the “Thunderbird plant” to expand our Central Oklahoma processing capacity. We expect to begin operations on the Thunderbird plant during the first quarter of 2019.

Central Oklahoma Crude Oil Gathering Systems. In late March 2018, we completed construction of the first phase of a new crude oil gathering system that we refer to as “Black Coyote.” Black Coyote expands our operations in the core of the STACK play in Central Oklahoma and was built primarily on acreage dedicated from Devon, which is the main shipper on the system. In addition, we are further expanding our crude oil gathering operations in the STACK through the construction of the Redbud Crude Oil Gathering System (“Redbud”), which is supported by a contract with an existing large and active customer in the STACK. We expect Redbud to be operational during the second half of 2018. Both Black Coyote and Redbud are jointly owned by ENLK and ENLC through their respective ownership in EOGP.

Lobo Natural Gas Gathering and Processing Facilities. During the second quarter of 2018, we completed construction of an expansion to our Lobo II cryogenic gas processing plant, bringing total operational processing capacity at our Lobo facilities to 175 MMcf/d. We are further expanding our gas processing capacity at our Lobo facilities through the construction of the Lobo III cryogenic gas processing plant. We expect 100 MMcf/d of operational capacity at Lobo III to be completed during the fourth quarter of 2018 and an additional 100 MMcf/d of operational capacity to be completed during the first quarter of 2019.

Non-GAAP Financial Measures

We include the following non-GAAP financial measures: cash available for distribution and gross operating margin.

Cash Available for Distribution

We calculate cash available for distribution as distributions due to us from ENLK, plus our interest in EOGP adjusted EBITDA (defined herein), less our share of maintenance capital attributable to our interest in EOGP, our specific general and administrative costs as a separate public reporting entity, the interest costs associated with our debt and current taxes attributable to our earnings. ENLC’s share of EOGP growth capital expenditures is funded by borrowings under the ENLC Credit Facility and is not considered in determining ENLC’s cash flow available for distribution.

We also calculate cash available for distribution as net income (loss) of ENLC less the net income (loss) attributable to ENLK, which is consolidated into ENLC’s net income (loss), plus ENLC's (i) share of distributions from ENLK, (ii) share of EOGP’s non-cash expenses, (iii) deferred income tax (benefit) expense, (iv) corporate goodwill impairment, if any, and (v) successful acquisition transaction costs, if any, less ENLC’s interest in maintenance capital expenditures of EOGP and less third-party non-controlling interest share of net income (loss) from consolidated affiliates.

Cash available for distribution is a supplemental performance measure used by us and by external users of our financial statements, such as investors, commercial banks, research analysts, and others to measure ENLC’s profitability and performance in creating value for its unitholders. As ENLC is a holding company without any direct operations, ENLC primarily generates value for its unitholders by generating returns on its investments in other entities and subsequently distributing these returns in cash to its unitholders. Therefore, cash available for distribution serves as an important measure of ENLC’s profitability and serves as an indicator of ENLC’s success in providing a cash return on its investments to its unitholders.

Maintenance capital expenditures include capital expenditures made to replace partially or fully depreciated assets in order to maintain the existing operating capacity of the assets and to extend their useful lives. Examples of maintenance capital expenditures are expenditures to refurbish and replace pipelines, gathering assets, well connections, compression assets, and processing assets up to their original operating capacity, to maintain pipeline and equipment reliability, integrity, and safety, and to address environmental laws and regulations.

The GAAP measure most directly comparable to cash available for distribution is net income (loss). Cash available for distribution should not be considered as an alternative to GAAP net income (loss). Cash available for distribution is not a presentation made in accordance with GAAP and has important limitations as an analytical tool. Investors should not consider cash available for distribution in isolation or as a substitute for analysis of our results as reported under GAAP. Because cash

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available for distribution excludes some items that affect net income (loss) and is defined differently by different companies in our industry, our definition of cash available for distribution may not be comparable to similarly-titled measures of other companies, thereby diminishing its utility.

The following is a calculation of our cash available for distribution (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Distribution declared by ENLK associated with (1):
General partner interest	$	0.6		$	0.7		$	1.2		$	1.3
Incentive distribution rights	14.8			14.6			29.6			29.3
ENLK common units owned	34.6			34.6			69.1			69.1
Total share of ENLK distributions declared	50.0			49.9			99.9			99.7
Adjusted EBITDA of EOGP (2)	10.3			5.1			19.2			7.7
Total cash available	60.3			55.0			119.1			107.4
Uses of cash:
General and administrative expenses	(1.3		)	(1.6		)	(2.5		)	(2.6		)
Current income taxes (3)	(0.1		)	(0.2		)	(0.2		)	(0.2		)
Interest expense	(0.9		)	(0.6		)	(1.7		)	(1.0		)
Maintenance capital expenditures (4)	(0.1		)	—			(0.2		)	—
Total cash used	(2.4		)	(2.4		)	(4.6		)	(3.8		)
ENLC cash available for distribution	$	57.9		$	52.6		$	114.5		$	103.6

(1) Represents distributions declared by ENLK and to be paid to ENLC onAugust 13, 2018and distributions paid by ENLK to ENLC onMay 14, 2018, August 11, 2017, and May 12, 2017.

(2) Represents ENLC’s interest in EOGP adjusted EBITDA, which is disbursed to ENLC by EOGP on a monthly basis. EOGP adjusted EBITDA is defined as earnings before depreciation and amortization and provision for income taxes and includes allocated expenses from ENLK.

(3) Represents ENLC’s stand-alone current tax expense.

(4) Represents ENLC’s interest in EOGP’s maintenance capital expenditures which is netted against the monthly disbursement of EOGP’s adjusted EBITDA per (2) above.

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The following table provides a reconciliation of our net income from continuing operations to our cash available for distribution (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Net income of ENLC	$	102.2		$	27.1		$	159.3		$	36.4
Less: Net income attributable to ENLK	98.9			29.6			159.0			47.7
Net income (loss) of ENLC excluding ENLK	3.3			(2.5		)	0.3			(11.3		)
ENLC's share of distributions from ENLK (1)	50.0			49.9			99.9			99.7
ENLC's interest in EOGP's non-cash expenses (2)	(2.3		)	4.2			2.4			8.2
ENLC deferred income tax expense (3)	8.4			3.3			14.2			5.8
Non-controlling interest share of ENLK's net (income) loss (4)	(1.4		)	(2.2		)	(2.1		)	1.2
Other items (5)	(0.1		)	(0.1		)	(0.2		)	—
ENLC cash available for distribution	$	57.9		$	52.6		$	114.5		$	103.6

(1) Represents distributions declared by ENLK and to be paid to ENLC onAugust 13, 2018and distributions paid by ENLK to ENLC on May 14, 2018, August 11, 2017, and May 12, 2017.

(2) Includes depreciation and amortization, unit-based compensation expense allocated to EOGP, gains and losses on sale of property, and non-cash revenue recognized upon receipt of secured term loan receivable related to contract restructuring (as discussed in “Item 1. Financial Statements—Note 2”).

(3) Represents ENLC’s stand-alone deferred taxes.

(4) Represents NGP’s49.9%share of the Delaware Basin JV, Marathon Petroleum Corporation’s 50% share of the Ascension JV, and other minor non-controlling interests.

(5) Represents ENLC’s interest in EOGP’s maintenance capital expenditures (which is netted against the monthly disbursement of EOGP’s adjusted EBITDA)and other non-cash items not included in cash available for distribution.

Gross Operating Margin

We define gross operating margin as revenues less cost of sales. We present gross operating margin by segment in “Results of Operations.” We disclose gross operating margin in addition to total revenue because it is the primary performance measure used by our management. We believe gross operating margin is an important measure because, in general, our business is to gather, process, transport, or market natural gas, NGLs, condensate, and crude oil for a fee or to purchase and resell natural gas, NGLs, condensate, and crude oil for a margin. Operating expense is a separate measure used by our management to evaluate operating performance of field operations. Direct labor and supervision, property insurance, property taxes, repair and maintenance, utilities, and contract services comprise the most significant portion of our operating expenses. We do not deduct operating expenses from total revenue in calculating gross operating margin because these expenses are largely independent of the volumes we transport or process and fluctuate depending on the activities performed during a specific period. The GAAP measure most directly comparable to gross operating margin is operating income (loss). Gross operating margin should not be considered an alternative to, or more meaningful than, operating income (loss) as determined in accordance with GAAP. Gross operating margin has important limitations because it excludes all operating costs that affect operating income (loss) except cost of sales. Our gross operating margin may not be comparable to similarly-titled measures of other companies because other entities may not calculate these amounts in the same manner.

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The following table provides a reconciliation of operating income (loss) to gross operating margin (in millions):

	Three Months Ended June 30,					Six Months Ended June 30,
	2018		2017			2018		2017
Operating income	$	148.8	$	68.9		254.1		$	125.4
Add (deduct):
Operating expenses	113.4		102.6			222.6		206.7
General and administrative expenses	30.4		31.1			57.9		67.2
(Gain) loss on disposition of assets	1.2		(5.4		)	1.3		(0.3		)
Depreciation and amortization	145.3		142.5			283.4		270.8
Impairments	—		—			—		7.0
Gain on litigation settlement	—		(8.5		)	—		(26.0		)
Gross operating margin	$	439.1	$	331.2		$	819.3	$	650.8

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Results of Operations

The table below sets forth certain financial and operating data for the periods indicated. We manage our operations by focusing on gross operating margin, which we define as revenue less cost of sales as reflected in the table below (in millions, except volumes):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Texas Segment
Revenues	$	339.8		$	325.5		$	649.9		$	650.0
Cost of sales	(178.7		)	(177.0		)	(340.2		)	(356.2		)
Total gross operating margin	$	161.1		$	148.5		$	309.7		$	293.8
Louisiana Segment
Revenues	$	808.0		$	645.7		$	1,582.1		$	1,282.5
Cost of sales	(723.0		)	(575.7		)	(1,409.7		)	(1,140.4		)
Total gross operating margin	$	85.0		$	70.0		$	172.4		$	142.1
Oklahoma Segment
Revenues	$	342.8		$	182.5		$	597.9		$	338.7
Cost of sales	(170.3		)	(99.0		)	(309.3		)	(187.7		)
Total gross operating margin	$	172.5		$	83.5		$	288.6		$	151.0
Crude and Condensate Segment
Revenues	$	608.1		$	295.9		$	1,259.0		$	664.5
Cost of sales	(572.4		)	(268.3		)	(1,195.7		)	(605.0		)
Total gross operating margin	$	35.7		$	27.6		$	63.3		$	59.5
Corporate Segment
Revenues	$	(334.0	)	$	(186.0	)	$	(562.5	)	$	(350.2	)
Cost of sales	318.8			187.6			547.8			354.6
Total gross operating margin	$	(15.2	)	$	1.6		$	(14.7	)	$	4.4
Total
Revenues	$	1,764.7		$	1,263.6		$	3,526.4		$	2,585.5
Cost of sales	(1,325.6		)	(932.4		)	(2,707.1		)	(1,934.7		)
Total gross operating margin	$	439.1		$	331.2		$	819.3		$	650.8
Midstream Volumes:
Texas Segment
Gathering and Transportation (MMBtu/d)	2,258,300			2,272,100			2,224,700			2,273,100
Processing (MMBtu/d)	1,283,100			1,179,700			1,238,800			1,170,900
Louisiana Segment
Gathering and Transportation (MMBtu/d)	2,094,100			1,939,500			2,158,200			1,935,400
Processing (MMBtu/d)	395,600			446,500			418,600			457,100
NGL Fractionation (Gals/d)	6,480,100			5,819,600			6,342,400			5,534,100
Oklahoma Segment
Gathering and Transportation (MMBtu/d)	1,235,500			765,500			1,142,200			735,600
Processing (MMBtu/d)	1,200,700			733,100			1,135,400			693,200
Crude and Condensate Segment
Crude Oil Handling (Bbls/d)	148,600			107,600			138,200			109,000
Brine Disposal (Bbls/d)	3,500			4,800			3,100			4,600

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Three Months Ended June 30, 2018 Compared to Three Months Ended June 30, 2017

Gross Operating Margin. Gross operating margin was $439.1 million for the three months ended June 30, 2018 compared to $331.2 million for the three months ended June 30, 2017, an increase of $107.9 million, or 32.6%, due to the following:

• Texas Segment. Gross operating margin in the Texas segment increased$12.6 million, which was due to a $12.6 million increase from our Permian Basin processing assets as a result of higher volumes from continued development by our customers. Our gross operating margin from our North Texas assets was flat quarter over quarter despite declines in volumes across the system, which were offset by an increase in revenue earned from MVCs (as discussed in more detail below). For the three months ended June 30, 2018, the shortfall revenue from Devon-related MVCs was $20.8 million compared to $13.7 million for the three months ended June 30, 2017.

• Louisiana Segment. Gross operating margin in the Louisiana segment increased$15.0 million, which was due to an $8.5 million increase from our NGL transmission and fractionation assets as a result of higher volumes received from our Permian Basin and Oklahoma assets and fees earned from the Ascension JV, which commenced operations in April 2017. In addition, there was a $6.5 million increase from our gas processing and transmission assets as a result of higher gathering and transportation volumes and increased gross operating margin under our processing margin contracts due to higher NGL prices during the three months ended June 30, 2018.

• Oklahoma Segment. Gross operating margin in the Oklahoma segment increased$89.0 million, which includes $45.5 million recognized from a contract restructuring with a customer during the three months ended June 30, 2018 (as discussed in “Item 1. Financial Statements—Note 2”). The remaining $43.5 million increase in gross operating margin was primarily due to higher volumes as a result of continued development by our customers.

• Crude and Condensate Segment. Gross operating margin in the Crude and Condensate segment increased$8.1 million, which was primarily due to a $4.8 million increase from our ORV assets due to higher condensate stabilization volumes and improved margins due to contract renegotiations. In addition, there was a $2.0 million increase from our Midland Basin crude business as a result of increased trucked volumes, higher trucking fees, and higher volumes due to continued expansion of our customer base on the Greater Chickadee gathering system.

• Corporate Segment. Gross operating margin in the Corporate segmentdecreased$16.8 million, which was due to the changes in fair value of our commodity swaps between the periods.For the three months endedJune 30, 2018, there were realized losses of$4.7 millionin addition to unrealized losses of$10.5 million.For the three months endedJune 30, 2017, realized losses of$0.2 millionwere offset by unrealized gains of$1.8 million.

Certain gathering and processing agreements in our Texas, Oklahoma, and Crude and Condensate segments provide for quarterly or annual MVCs, including MVCs from Devon from certain of our Barnett Shale assets in North Texas and our Cana gathering and processing assets in Oklahoma. Under these agreements, our customers agree to ship and/or process a minimum volume of commodity on our systems over an agreed time period. If a customer under such an agreement fails to meet its MVC for a specified period, the customer is obligated to pay a contractually-determined fee based upon the shortfall between actual commodity volumes and the MVC for that period. Some of these agreements also contain make-up right provisions that allow a customer to utilize gathering or processing fees in excess of the MVC in subsequent periods to offset shortfall amounts in previous periods. We record revenue under MVC contracts during periods of shortfall when it is known that the customer cannot, or will not, make up the deficiency in subsequent periods.

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Revenue recorded for the shortfall between actual production volumes and the MVC is as follows (in millions):

	Texas		Oklahoma		Crude and Condensate		Total
Three Months Ended
June 30, 2018
Midstream services (1)	$	0.1	$	47.7	$	—	$	47.8
Midstream services—related parties	20.8		—		2.3		23.1
Total	$	20.9	$	47.7	$	2.3	$	70.9
June 30, 2017
Midstream services	$	0.5	$	4.7	$	—	$	5.2
Midstream services—related parties	13.7		4.4		2.0		20.1
Total	$	14.2	$	9.1	$	2.0	$	25.3

(1) We restructured a natural gas gathering and processing contract that contained MVCs. As a result, we recognized$45.5 millionof midstream services revenue in the Oklahoma segment for the three months endedJune 30, 2018. For more information, see “Item 1. Financial Statements—Note 2.”

On January 1, 2019, certain MVCs related to gathering and processing agreements with Devon for operations in the Texas and Oklahoma segments will expire. These MVCs generated$20.8 millionin shortfall revenue for the three months endedJune 30, 2018.

In May 2018, we restructured one of our natural gas gathering and processing contracts that included MVCs that were in effect through 2023. Prior to the contract restructuring, we expected$135.1 million in guaranteed future gross operating margin under the contract, generated from either revenue or reductions to cost of sales resulting from both gathering and processing fees as well as shortfall revenue under the MVCs. As a result of the contract restructuring, all MVC provisions were removed from the contract, and we and the counterparty entered into additional agreements pursuant to which: (i) the counterparty made a$19.7 million payment to us on the date of the contract restructuring to satisfy MVC revenue earned up to the date of the contract restructuring; (ii) the counterparty entered into a second lien secured term loan under which the counterparty will pay us$58.0 millionin principal payments in various installments ending in May 2023, with interest accruing on the loan balance at8.0%per annum beginning in 2020; and (iii) the counterparty granted to us a1.0%term overriding royalty interest through June 2034 in each well located on leasehold interests of the counterparty and connected to the gas gathering system that we operate. As a result of the contract restructuring and in accordance with ASC 606, we recognized$45.5 millionof midstream services revenue, which primarily represents the discounted present value of the second lien secured term loan receivable, in the Oklahoma segment in the second quarter of 2018. Pursuant to the contract restructuring, the terms of the restructured contract, other than the MVCs, are the same as the original contract, and we expect to continue recognizing gathering and processing fees on volumes delivered by the customer.

Operating Expenses. Operating expenses were $113.4 million for the three months ended June 30, 2018 compared to $102.6 million for the three months ended June 30, 2017, an increase of $10.8 million, or 10.5%. The primary contributors to the total increase by segment were as follows (in millions):

	Three Months Ended June 30,				Change
	2018		2017		$			%
Texas Segment	$	45.8	$	42.9	$	2.9		6.8	%
Louisiana Segment	28.0		24.6		3.4			13.8	%
Oklahoma Segment	20.8		14.7		6.1			41.5	%
Crude and Condensate Segment	18.8		20.4		(1.6		)	(7.8	)%
Total	$	113.4	$	102.6	$	10.8		10.5	%

• Texas Segment. Operating expenses in the Texas segmentincreased$2.9 millionprimarily due to expanded operations in the Permian Basin.

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• Louisiana Segment. Operating expenses in the Louisiana segmentincreased$3.4 millionprimarily due to increased regulatory, utilities, and materials and supplies expenses as a result of higher volumes across our Louisiana assets.

• Oklahoma Segment. Operating expenses in the Oklahoma segment increased$6.1 million primarily due to an increase in labor and benefits expenses due to increased headcount, as well as an increase in materials and supplies, utilities, and ad valorem tax expenses as a result of increased activity on our Oklahoma assets.

• Crude and Condensate Segment. Operating expenses in the Crude and Condensate segmentdecreased$1.6 millionprimarily due to decreases in third-party transportation charges and labor and benefits expenses.

Depreciation and Amortization. Depreciation and amortization expenses were $145.3 million for the three months endedJune 30, 2018 compared to$142.5 million for the three months ended June 30, 2017, an increase of $2.8 million, or2.0%. This increase was primarily due to increased depreciation from our Central Oklahoma assets.

(Gain) Loss on Disposition of Assets.Losson disposition of assets was$1.2 millionfor the three months endedJune 30, 2018compared to againof$5.4 millionfor the three months endedJune 30, 2017, a decrease of $6.6 million. The gain on disposition of $5.4 million for the three months ended June 30, 2017 was primarily due to the retirement of certain plant assets, as well as certain asset dispositions.

Gain on Litigation Settlement. We settled a lawsuit in 2017 and recognized a gain on litigation settlement of$8.5 million for the three months ended June 30, 2017. 

Gain on Extinguishment of Debt. We recognized a gain on extinguishment of debt of $9.0 million for the three months ended June 30, 2017 due to the redemption of $162.5 million in aggregate principal amount of ENLK’s 7.125% senior unsecured notes due 2022.

Interest Expense. Interest expense was $44.6 million for the three months ended June 30, 2018 compared to $47.7 millionfor the three months ended June 30, 2017, a decrease of $3.1 million, or 6.5%. Interest expense consisted of the following (in millions):

	Three Months Ended June 30,
	2018			2017
ENLK senior notes	$	40.0		$	38.9
ENLK Credit Facility	4.9			2.5
ENLC Credit Facility	0.9			0.5
Capitalized interest	(1.6		)	(1.4		)
Amortization of debt issue costs and net discounts	0.9			7.1
Other	(0.5		)	0.1
Total	$	44.6		$	47.7

Income (Loss) from Unconsolidated Affiliate Investments. Income from unconsolidated affiliate investments was$4.4 millionfor the three months endedJune 30, 2018compared to a loss of$0.1 millionfor the three months endedJune 30, 2017, an increase of$4.5 million. The increase was primarily due to a$4.8 millionincreasein income from our investment in GCF for the three months endedJune 30, 2018, which was partially offset by a$0.3 milliondecreasein income from our Cedar Cove JV for the three months endedJune 30, 2018.

Income Tax Benefit (Provision). Income tax expense was $6.3 million for the three months ended June 30, 2018 compared to $3.2 million for the three months ended June 30, 2017, an increase of $3.1 million. The increase in income tax expense was primarily attributable to higher taxable income between periods, partially offset by a decrease in our statutory federal tax rate. See “Item 1. Financial Statements—Note 6” for additional information.

Net Income (Loss) Attributable to Non-Controlling Interest. Net income attributable to non-controlling interest was $74.2 million for the three months ended June 30, 2018 compared to net income of $21.2 million for the three months ended June 30, 2017, an increase of $53.0 million. This increase was primarily due to an increase in net income at ENLK and an increase in outstanding ENLK common units, Series B Preferred Units, and Series C Preferred Units that are not owned by ENLC.

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Six Months Ended June 30, 2018 Compared to Six Months Ended June 30, 2017

Gross Operating Margin. Gross operating margin was$819.3 million for the six months ended June 30, 2018 compared to $650.8 million for the six months ended June 30, 2017, an increase of $168.5 million, or 25.9%, due to the following:

• Texas Segment. Gross operating margin in the Texas segmentincreased$15.9 million, which was primarily due to a $19.0 million increase from our Permian Basin processing assets as a result of higher volumes due to continued development by our customers, partially offset by a $3.1 million decrease from our North Texas assets as a result of lower volumes due to well production declines. The decrease in gross operating margin from our North Texas assets was partially offset by an increase in revenue earned from MVCs (as discussed in more detail below). For the six months ended June 30, 2018, the shortfall revenue from Devon-related MVCs was $38.9 million compared to $26.2 million for the six months ended June 30, 2017.

• Louisiana Segment. Gross operating margin in the Louisiana segmentincreased $30.3 million, which was primarily due to a $29.0 million increase in our NGL transmission and fractionation gross operating margin due to additional NGL volumes received from our Oklahoma and Permian Basin assets and fees earned from the start-up of our Ascension JV assets in April 2017, as well as a $1.3 million increase from volume increases within our gas gathering and transmission assets.

• Oklahoma Segment. Gross operating margin in the Oklahoma segmentincreased$137.6 million, which was primarily due to a $92.1 million increase from higher volumes as a result of continued development by our customers. In addition, during the six months ended June 30, 2018, we restructured a contract with a customer, which resulted in the recognition of $45.5 million in revenue for the six months ended June 30, 2018 (as discussed in “Item 1. Financial Statements —Note 2”).

• Crude and Condensate Segment. Gross operating margin in the Crude and Condensate segmentincreased$3.8 million, which was primarily due to a $1.5 million increase from our ORV assets related to renegotiated contracts and a $2.8 million increase due to higher volumes from continued expansion of our customer base on the Greater Chickadee gathering system.

• Corporate Segment. Gross operating margin in the Corporate segmentdecreased$19.1 milliondue to the changes in fair value of our commodity swaps between the periods. For the six months ended June 30, 2018, there were realized losses of$0.7 millionin addition to unrealized losses of$14.0 million. For the six months ended June 30, 2017, realized losses of$2.7 millionwere offset by unrealized gains of$7.1 million.

Revenue recorded for the shortfall between actual production volumes and the MVC is as follows (in millions):

	Texas		Oklahoma		Crude and Condensate		Total
Six Months Ended
June 30, 2018
Midstream services (1)	$	0.1	$	52.7	$	—	$	52.8
Midstream services—related parties	38.9		1.2		5.7		45.8
Total	$	39.0	$	53.9	$	5.7	$	98.6
June 30, 2017
Midstream services	$	0.8	$	6.2	$	—	$	7.0
Midstream services—related parties	26.2		8.0		2.8		37.0
Total	$	27.0	$	14.2	$	2.8	$	44.0

(1) We restructured a natural gas gathering and processing contract that contained MVCs. As a result, we recognized$45.5 millionof midstream services revenue in the Oklahoma segment for thesixmonths endedJune 30, 2018. For more information, see “Item 1. Financial Statements—Note 2.”

On January 1, 2019, certain MVCs related to gathering and processing agreements with Devon for operations in the Texas and Oklahoma segments will expire. These MVCs generated$40.1 millionin shortfall revenue for the six months endedJune 30, 2018.

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Operating Expenses. Operating expenses were $222.6 million for the six months ended June 30, 2018 compared to $206.7 million for the six months ended June 30, 2017, an increase of $15.9 million, or 7.7%. The primary contributors to the increase by segment were as follows (in millions):

	Six Months Ended June 30,				Change
	2018		2017		$			%
Texas Segment	$	90.0	$	86.8	$	3.2		3.7	%
Louisiana Segment	53.6		50.0		3.6			7.2	%
Oklahoma Segment	41.5		28.8		12.7			44.1	%
Crude and Condensate Segment	37.5		41.1		(3.6		)	(8.8	)%
Total	$	222.6	$	206.7	$	15.9		7.7	%

• Texas Segment. Operating expenses in the Texas segmentincreased$3.2 millionas a result of expanded operations and higher utilities expense in the Permian Basin.

• Louisiana Segment. Operating expenses in the Louisiana segmentincreased$3.6 millionprimarily due to increased regulatory, utilities, and materials and supplies expenses as a result of the start-up of the Ascension JV in April 2017 and higher volumes across our Louisiana assets.

• Oklahoma Segment. Operating expenses in the Oklahoma segmentincreased$12.7 million primarily due to increased labor and benefits charges attributable to higher headcount and increased materials and supplies expense as a result of expanded operations.

• Crude and Condensate Segment. Operating expenses in the Crude and Condensate segmentdecreased$3.6 millionprimarily due to decreases in third-party transportation charges and labor and benefits expenses.

General and Administrative Expenses. General and administrative expenses were $57.9 million for the six months ended June 30, 2018 compared to $67.2 million for the six months ended June 30, 2017, a decrease of $9.3 million, or 13.8%. The primary contributors to the decrease were as follows:

• Unit-based compensation expense decreased $10.7 million primarily due to a higher portion of the annual bonuses being paid in the form of units that vested immediately in March 2017.

• Office lease expense decreased $0.9 million.

• Salaries and wages expense increased $3.4 million due to a higher portion of the annual bonus being paid in cash during 2018.

Depreciation and Amortization. Depreciation and amortization expenses were $283.4 million for the six months ended June 30, 2018 compared to $270.8 million for the six months ended June 30, 2017, an increase of $12.6 million, or 4.7%. Thisincreasewas primarily due to increased depreciation from our Central Oklahoma assets.

Gain on Litigation Settlement. We settled a lawsuit in 2017 and recognized a gain on litigation settlement of$26.0 millionfor thesixmonths endedJune 30, 2017.

Gain on Extinguishment of Debt. We recognized a gain on extinguishment of debt of $9.0 million for thesixmonths endedJune 30, 2017 due to the redemption of $162.5 million in aggregate principal amount of ENLK’s 7.125% senior unsecured notes due 2022.

Impairments.We recognized impairment expense for thesixmonths endedJune 30, 2017related to the carrying values of rights-of-way that we are no longer using and a brine disposal well that was abandoned.

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Interest Expense. Interest expense was $89.1 million for the six months ended June 30, 2018 compared to $92.6 million for the six months ended June 30, 2017, a decrease of $3.5 million, or 3.8%. Interest expense consisted of the following (in millions):

	Six Months Ended June 30,
	2018			2017
ENLK senior notes	$	80.0		$	75.0
ENLK Credit Facility	8.3			5.9
ENLC Credit Facility	1.6			0.9
Capitalized interest	(2.9		)	(4.0		)
Amortization of debt issue cost and net discounts (premium)	2.5			14.4
Other	(0.4		)	0.4
Total	$	89.1		$	92.6

Income (Loss) from Unconsolidated Affiliate Investments. Income from unconsolidated affiliate investments was $7.4 millionfor the six months endedJune 30, 2018compared to $0.6 millionfor the six months endedJune 30, 2017, an increase of $6.8 million. The increasewas primarily due to additional income of $5.4 million from our GCF investment as a result of higher fractionation revenues and lower operating expensesand a $3.4 million loss on the sale of our HEP investment for the six months ended June 30, 2017. These increases were offset by a $2.0 million decrease in income from our Cedar Cove JV for the six months endedJune 30, 2018.

Income Tax Benefit (Provision). Income tax expense was $13.3 million for the six months ended June 30, 2018 compared to income tax expense of $6.2 million for the six months ended June 30, 2017, an increase of $7.1 million. The increase in income tax expense was primarily attributable to an increase in taxable income between periods, partially offset by a decrease in our statutory federal tax rate. See “Item 1. Financial Statements—Note 6” for additional information.

Net Income (Loss) Attributable to Non-Controlling Interest. Net income attributable to non-controlling interest was $118.9 million for the six months ended June 30, 2018 compared to a net income of $32.4 million for the six months ended June 30, 2017, an increase of $86.5 million. This increase was primarily due to an increase in net income at ENLK and an increase in outstanding ENLK common units, Series B Preferred Units, and Series C Preferred Units that are not owned by ENLC.

Critical Accounting Policies

Information regarding our critical accounting policies is included in Item 7 of our Annual Report on Form 10-K for the year endedDecember 31, 2017, except for our critical accounting policy on revenue recognition, which changed as a result of the adoption of ASC 606 on January 1, 2018. See “Item 1. Financial Statements—Note 2” for information on our revenue recognition accounting policy.

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Liquidity and Capital Resources

Cash Flows from Operating Activities. Net cash provided by operating activities was $429.3 million for the six months ended June 30, 2018 compared to $329.1 million for the six months ended June 30, 2017. Operating cash flows and changes in working capital for comparative periods were as follows (in millions):

	Six Months Ended June 30,
	2018			2017
Operating cash flows before working capital	$	444.0		$	343.0
Changes in working capital	(14.7		)	(13.9		)

Operating cash flows before changes in working capitalincreased$101.0 millionfor the six months ended June 30, 2018compared to the six months endedJune 30, 2017primarily due to a$142.1 millionincrease in gross operating margin, excluding gains and losses on derivative activity and excluding non-cash revenue recognized from the restructuring of a contract (as discussed in “Item 1. Financial Statements—Note 2). The increase in operating cash flows was partially offset by a$8.4 millionincrease in interest expense, excluding amortization of debt issue costs and net discounts, as well as a$26.0 milliongain on litigation settlement recognized for the six months ended June 30, 2017. The remaining difference is due to higher cash paid for operating expenses and general and administrative expenses for the six months ended June 30, 2018. The changes in working capital for thesixmonths endedJune 30, 2018compared to thesixmonths endedJune 30, 2017were primarily due to fluctuations in trade receivable and payable balances due to timing of collection and payments and changes in inventory balances attributable to normal operating fluctuations.

Cash Flows from Investing Activities. Net cash used in investing activities was $401.8 million for the six months endedJune 30, 2018, compared to $283.6 million for the six months ended June 30, 2017. Our primary investing cash flows were as follows (in millions):

	Six Months Ended June 30,
	2018			2017
Growth capital expenditures	$	(385.9	)	$	(458.1	)
Maintenance capital expenditures	(18.5		)	(13.6		)
Proceeds from sale of unconsolidated affiliate investment	—			189.7

Growth capital expenditures decreased$72.2 million for the six months ended June 30, 2018 compared to the six months ended June 30, 2017. The decreasewas primarily due to completion of capital expenditures in 2017 related to the Greater Chickadee crude oil gathering system in the Permian Basin and the Ascension JV assets in Louisiana, in addition to lower capital expenditure levels for our expansion projects in the Central Oklahoma assets compared to 2017.

We completed the sale of our ownership interest in HEP in March 2017 and received net proceeds of $189.7 million.

Cash Flows from Financing Activities. Net cash used in financing activities was $21.9 million for the six months ended June 30, 2018 and $45.8 million for the six months ended June 30, 2017. Our primary financing activities consisted of the following (in millions):

	Six Months Ended June 30,
	2018			2017
Net borrowings on the ENLK Credit Facility	$	520.0		$	46.0
Net borrowings on the ENLC Credit Facility	9.8			37.7
ENLK unsecured senior notes borrowings, net of notes extinguished	—			331.6
Proceeds from issuance of ENLK common units	0.9			72.2
Contributions by non-controlling interests	54.3			28.5
Payment of installment payable for EOGP acquisition	(250.0		)	(250.0		)

On May 11, 2017, ENLK issued $500.0 million in aggregate principal amount of ENLK’s 5.450% senior unsecured notes due June 1, 2047 at a price to the public of 99.981% of their face value. The net proceeds of approximately $495.2 million were used to repay outstanding borrowings under the ENLK Credit Facility and for general partnership purposes. For the six months ended June 30, 2017, ENLK redeemed $162.5 million in aggregate principal amount of ENLK’s 7.125% senior unsecured

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notes due June 1, 2022 at 103.6% of the principal amount, plus accrued unpaid interest, for aggregate cash consideration of $174.1 million, which included payments for accrued interest of $5.8 million.

For thesixmonths endedJune 30, 2018, ENLK sold an aggregate of approximately0.1 millioncommon units under the 2017 EDA, generating proceeds of $0.9 million. For thesixmonths endedJune 30, 2017, ENLK sold an aggregate of approximately4.0 millioncommon units under a prior equity distribution agreement, generating proceeds of$72.2 million.

For the six months ended June 30, 2018, contributions by non-controlling interests included $54.5 million from NGP to the Delaware Basin JV. For the six months ended June 30, 2017, contributions by non-controlling interests included $24.8 million from NGP to the Delaware Basin JV and $3.7 million from Marathon Petroleum Corporation to the Ascension JV. 

For thesixmonths endedJune 30, 2018and2017, we made the final two $250.0 million payments under the installment payable obligation related to the EOGP acquisition.

Distributions to unitholders and non-controlling interests also represent a primary use of cash in financing activities. Total cash distributions made for the six months ended June 30, 2018 and 2017 were as follows (in millions):

	Six Months Ended June 30,
	2018		2017
Distributions to members	$	95.7	$	92.9
Distributions to non-controlling interests	255.5		202.9

Distributions to non-controlling interests included distributions paid to public unitholders of ENLK common units, Series B Preferred Units, and Series C Preferred Units, as well as distributions made to our joint venture partners. 

Series B Preferred Unit distributions for the six months ended June 30, 2017 were paid in-kind by ENLK in the form of additional Series B Preferred Units. As these were non-cash distributions, they were not reflected in our financing cash flows for the six months ended June 30, 2017. Beginning with the quarter ended September 30, 2017, Series B Preferred Unit distributions are payable quarterly in cash in an amount per quarter equal to $0.28125 per Series B Preferred Unit (the “Cash Distribution Component”) plus an in-kind distribution equal to the greater of (a) 0.0025 Series B Preferred Units per Series B Preferred Unit and (b) an amount equal to (i) the excess, if any, of the distributions that would have been payable had the Series B Preferred Units converted into common units for that quarter over the Cash Distribution Component, divided by (ii) the issue price of $15.00.

Distributions on the Series C Preferred Units accrue and are cumulative from the date of original issue and payable semi-annually in arrears on the 15^th day of June and December of each year through and including December 15, 2022 and, thereafter, quarterly in arrears on the 15^th day of March, June, September, and December of each year, in each case, if and when declared by the General Partner out of legally available funds for such purpose. The distribution rate for the Series C Preferred Units from and including the date of original issue to, but not including, December 15, 2022 is 6.0%per annum. On and after December 15, 2022, distributions on the Series C Preferred Units will accumulate for each distribution period at a percentage of the $1,000 liquidation preference per unit equal to an annual floating rate of the three-month LIBOR plus a spread of4.11%.

Capital Requirements. We consider a number of factors in determining whether our capital expenditures are growth capital expenditures or maintenance capital expenditures. Growth capital expenditures generally include capital expenditures made for acquisitions or capital improvements that we expect will increase our asset base, operating income, or operating capacity over the long-term. Examples of growth capital expenditures include the acquisition of assets and the construction or development of additional pipeline, storage, well connections, gathering, or processing assets, in each case, to the extent such capital expenditures are expected to expand our asset base, operating capacity, or our operating income.

Maintenance capital expenditures include capital expenditures made to replace partially or fully depreciated assets in order to maintain the existing operating capacity of the assets and to extend their useful lives. Examples of maintenance capital expenditures are expenditures to refurbish and replace pipelines, gathering assets, well connections, compression assets, and processing assets up to their original operating capacity, or to maintain pipeline and equipment reliability, integrity, and safety and to address environmental laws and regulations.

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We expect our remaining 2018 capital expenditures, including capital contributions to our unconsolidated affiliate investments, to be as follows (in millions):

	Remainder of
	2018
Growth Capital Expenditures
Texas segment	$	135 - 165
Louisiana segment		35 - 45
Oklahoma segment (1)		183 - 223
Crude and Condensate segment		72 - 102
Corporate segment		3 - 8
Total growth capital expenditures	$	428 - 543
Less: Growth capital expenditures funded by joint venture partners (2)		(44 - 59)
Growth capital expenditures, attributable to ENLC	$	384 - 484
Maintenance Capital Expenditures	$	32 - 37

(1) Includes projected growth capital contributions related to our non-controlling interest share of the Cedar Cove JV.

(2) Includes growth capital expenditures that will be contributed by other entities and relate to the non-controlling interest share of our consolidated entities. These contributions include contributions by NGP to the Delaware Basin JV and contributions by Marathon Petroleum Corporation to the Ascension JV.

Our primary capital projects for the remainder of 2018include the construction of the Thunderbird processing plant in Central Oklahoma, the Lobo III processing plant and Avenger in the Delaware Basin, and the development of additional crude oil gathering assets in Oklahoma. See “Recent Developments” for further details.

We expect to fund growth capital expenditures from the proceeds of borrowings under the ENLK Credit Facility, the ENLC Credit Facility, and proceeds from other debt and equity sources, including capital contributions by joint venture partners that relate to the non-controlling interest share of our consolidated entities. We expect to fund our maintenance capital expenditures from operating cash flows. In 2018, it is possible that not all of our planned projects will be commenced or completed. Our ability to pay distributions to our unitholders, to fund planned capital expenditures, and to make acquisitions will depend upon our future operating performance, which will be affected by prevailing economic conditions in the industry, financial, business, and other factors, some of which are beyond our control.

Off-Balance Sheet Arrangements. No off-balance sheet arrangements existed as of June 30, 2018.

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Total Contractual Cash Obligations. A summary of contractual cash obligations as of June 30, 2018 is as follows (in millions):

	Payments Due by Period
	Total		Remainder 2018		2019		2020		2021		2022		Thereafter
Long-term debt obligations (1)	$	3,500.0	$	—	$	400.0	$	—	$	—	$	—	$	3,100.0
ENLK Credit Facility	520.0		—		—		520.0		—		—		—
ENLC Credit Facility	84.4		—		84.4		—		—		—		—
Interest payable on fixed long-term debt obligations	2,493.4		79.9		154.5		149.2		149.2		149.2		1,811.4
Capital lease obligations	3.6		0.8		1.5		1.3		—		—		—
Operating lease obligations	103.8		7.9		11.5		8.6		8.6		8.6		58.6
Purchase obligations	44.6		44.6		—		—		—		—		—
Delivery contract obligation	17.9		8.9		9.0		—		—		—		—
Pipeline capacity and deficiency agreements (2)	166.4		15.2		33.2		22.8		22.8		22.4		50.0
Inactive easement commitment (3)	10.0		—		—		—		—		10.0		—
Total contractual obligations	$	6,944.1	$	157.3	$	694.1	$	701.9	$	180.6	$	190.2	$	5,020.0

(1) On April 1, 2019, $400.0 million in aggregate principal amount of ENLK’s 2.7% senior unsecured notes will mature.

(2) Consists of pipeline capacity payments for firm transportation and deficiency agreements.

(3) Amounts related to inactive easements paid as utilized by us with balance due in 2022 if not utilized.

The above table does not include any physical or financial contract purchase commitments for natural gas and NGLs due to the nature of both the price and volume components of such purchases, which vary on a daily or monthly basis. Additionally, we do not have contractual commitments for fixed price and/or fixed quantities of any material amount.

The interest payable under the ENLK Credit Facility and the ENLC Credit Facility is not reflected in the above table because such amounts depend on the outstanding balances and interest rates, which vary from time to time.

Our contractual cash obligations for the next twelve months are expected to be funded from cash flows generated from our operations, proceeds from ENLK common unit issuances under the 2017 EDA, asset sales, and borrowings under the ENLC Credit Facility and ENLK Credit Facility.

Indebtedness

The ENLK Credit Facility is a $1.5 billion unsecured revolving credit facility that matures on March 6, 2020 and includes a $500.0 million letter of credit subfacility. As of June 30, 2018, there were $9.3 millionin outstanding letters of credit and $520.0 million outstanding borrowings under the ENLK Credit Facility, leaving approximately $970.7 million available for future borrowing.

The ENLC Credit Facility is a $250.0 million revolving credit facility that matures on March 7, 2019 and includes a $125.0 million letter of credit subfacility. As of June 30, 2018, there were no outstanding letters of credit and $84.4 million in outstanding borrowings under the ENLC Credit Facility, leaving approximately $165.6 million available for future borrowing.

In addition, as of June 30, 2018, ENLK has $3.5 billion in aggregate principal amount of outstanding unsecured senior notes with $400.0 millionmaturing in April 2019 and the remaining amount maturing from 2024 to 2047.

See “Item 1. Financial Statements—Note 5” for more information on our outstanding debt instruments.

Recent Accounting Pronouncements

See “Item 1. Financial Statements—Note 2” for more information on recently issued and adopted accounting pronouncements.

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Disclosure Regarding Forward-Looking Statements

This Quarterly Report on Form 10-Q contains forward-looking statements that are based on information currently available to management as well as management’s assumptions and beliefs. All statements, other than statements of historical fact, included in this Quarterly Report constitute forward-looking statements, including, but not limited to, statements identified by the words “forecast,” “may,” “believe,” “will,” “should,” “plan,” “predict,” “anticipate,” “intend,” “estimate,” “expect,” “continue,” and similar expressions. Such statements reflect our current views with respect to future events, based on what we believe are reasonable assumptions; however, such statements are subject to certain risks and uncertainties. In addition to the specific uncertainties discussed elsewhere in this Quarterly Report on Form 10-Q, the risk factors set forth in Part II, “Item 1A. Risk Factors” of this report and in Part I, “Item 1A. Risk Factors” of our Annual Report on Form 10-K for the year endedDecember 31, 2017may affect our performance and results of operations. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may differ materially from those in the forward-looking statements. We disclaim any intention or obligation to update or review any forward-looking statements or information, whether as a result of new information, future events, or otherwise.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

Market risk is the risk of loss arising from adverse changes in market rates and prices. Our primary market risk is the risk related to changes in the prices of natural gas, NGLs, condensate, and crude oil. In addition, we are also exposed to the risk of changes in interest rates on floating rate debt.

Comprehensive financial reform legislation was signed into law by the President on July 21, 2010. The legislation calls for the CFTC to regulate certain markets for derivative products, including OTC derivatives. The CFTC has issued several new relevant regulations that mandate that certain derivatives products be subject to margin requirements, cleared at a clearinghouse, or executed on an exchange. While some of these rules have been finalized, some have not and, as a result, the final form and timing of the implementation of the new regulatory regime affecting commodity derivatives remains uncertain.

In particular, on October 18, 2011, the CFTC adopted final rules under the Dodd-Frank Act establishing position limits for certain energy commodity futures and options contracts and economically equivalent swaps, futures, and options. The CFTC’s original position limits rule was challenged in court by two industry associations and was vacated and remanded by a federal district court. The CFTC has withdrawn its appeal of the court order vacating the original position limits rule. However, in November 2013, the CFTC proposed new rules that would place limits on positions in certain core futures and equivalent swaps contracts for or linked to certain physical commodities, subject to exceptions for certain bona fide hedging transactions. In December 2016, the CFTC modified and reproposed its positions limits rules. The CFTC has sought comment on the position limits rule as reproposed, but these new position limit rules are not yet final and the impact of those provisions on us is uncertain at this time.

The legislation and new regulations may also require counterparties to our derivative instruments to spin off some of their derivatives activities to separate entities, which may not be as creditworthy as the current counterparties. The new legislation and any future new regulations could significantly increase the cost of derivative contracts, materially alter the terms of derivative contracts, reduce the availability of derivatives to protect against risks we encounter, reduce our ability to monetize or restructure our existing derivative contracts, and increase our exposure to less creditworthy counterparties. If we reduce our use of derivatives as a result of the legislation and regulations, our results of operations may become more volatile, and our cash flows may be less predictable, which could adversely affect our ability to plan for and fund capital expenditures and to generate sufficient cash flow to pay quarterly distributions at current levels or at all. Our revenues could be adversely affected if a consequence of the legislation and regulations is lower commodity prices. Any of these consequences could have a material adverse effect on us, our financial condition, and our results of operations.

Commodity Price Risk

We are subject to risks due to fluctuations in commodity prices. Approximately 93% of our gross operating margin for thesix months ended June 30, 2018was generated from arrangements with fee-based structures with minimal direct commodity price exposure.Our exposure to these commodity price fluctuations is primarily in the gas processing component of our business. We currently process gas under four main types of contractual arrangements (or a combination of these types of contractual arrangements) as summarized below.

1. Fee-based contracts: Under fee-based contracts, we earn our fees through (1) stated fixed-fee arrangements in which we are paid a fixed fee per unit of volume processed or (2) arrangements where we purchase and resell commodities in

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connection with providing the related processing service and earn a net margin through a fee-like deduction subtracted from the purchase price of the commodities.

2. Processing margin contracts: Under these contracts, we pay the producer for the full amount of inlet gas to the plant, and we make a margin based on the difference between the value of liquids recovered from the processed natural gas as compared to the value of the natural gas volumes lost and the cost of fuel used in processing. The shrink and fuel losses are referred to as plant thermal reduction, or PTR. Our margins from these contracts are high during periods of high liquids prices relative to natural gas prices and can be negative during periods of high natural gas prices relative to liquids prices. However, we mitigate our risk of processing natural gas when margins are negative primarily through our ability to bypass processing when it is not profitable for us or by contracts that revert to a minimum fee for processing if the natural gas must be processed to meet pipeline quality specifications. For thesix months ended June 30, 2018, approximately 1.3%of our contracts, based on gross operating margin, were under processing margin contracts.

3. POL contracts: Under these contracts, we receive a fee in the form of a percentage of the liquids recovered, and the producer bears all the cost of the natural gas shrink. Therefore, our margins from these contracts are greater during periods of high liquids prices. Our margins from processing cannot become negative under POL contracts, but they do decline during periods of low liquids prices.

4. POP contracts: Under these contracts, we receive a fee in the form of a portion of the proceeds of the sale of natural gas and liquids. Therefore, our margins from these contracts are greater during periods of high natural gas and liquids prices. Our margins from processing cannot become negative under POP contracts, but they do decline during periods of low natural gas and liquids prices.

For thesixmonths ended June 30, 2018, approximately6.4%of our contracts, based on gross operating margin, were under POL or POP contracts.

Our primary commodity risk management objective is to reduce volatility in our cash flows. We maintain a risk management committee, including members of senior management, which oversees all hedging activity. We enter into hedges for natural gas and NGLs using OTC derivative financial instruments with only certain well-capitalized counterparties which have been approved by our risk management committee.

We have hedged our exposure to fluctuations in prices for natural gas, NGLs, crude oil, and condensate volumes produced for our account. We hedge our exposure based on volumes we consider hedgeable (volumes committed under contracts that are long term in nature) versus total volumes that include volumes that may fluctuate due to contractual terms, such as contracts with month-to-month processing options. Further, we have tailored our hedges to generally match the NGL product composition and the NGL and natural gas delivery points to those of our physical equity volumes. The NGL hedges cover specific NGL products based upon our expected equity NGL composition.

The following table sets forth certain information related to derivative instruments outstanding at June 30, 2018mitigating the risks associated with the gas processing and fractionation components of our business. The relevant payment index price for liquids is the monthly average of the daily closing price for deliveries of commodities into Mont Belvieu, Texas as reported by Oil Price Information Service. The relevant index price for natural gas is Henry Hub Gas Daily as defined by the pricing dates in the swap contracts.

Period	Underlying	Notional Volume	We Pay	We Receive (1)	Fair Value Asset/(Liability) (In millions)
July 2018 - June 2019	Ethane	425 (MBbls)	$0.3051/gal	Index	$	0.5
July 2018 - June 2019	Propane	767 (MBbls)	Index	$0.8676/gal	(5.1		)
July 2018 - June 2019	Normal Butane	244 (MBbls)	Index	$0.9623/gal	(1.3		)
July 2018 - June 2019	Natural Gasoline	107 (MBbls)	Index	$1.4054/gal	(0.9		)
July 2018 - October 2019	Natural Gas	45,989 (MMBtu/d)	Index	$2.183/MMBtu	(1.0		)
August 2018 - December 2021	Crude and condensate	7,650 (MBbls)	Index	$59.53/bbl	(7.8		)
					$	(15.6	)

(1) Weighted average.

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Another price risk we face is the risk of mismatching volumes of gas bought or sold on a monthly price versus volumes bought or sold on a daily price. We enter each month with a balanced book of natural gas bought and sold on the same basis. However, it is normal to experience fluctuations in the volumes of natural gas bought or sold under either basis, which leaves us with short or long positions that must be covered. We use financial swaps to mitigate the exposure at the time it is created to maintain a balanced position.

The use of financial instruments may expose us to the risk of financial loss in certain circumstances, including instances when (1) sales volumes are less than expected requiring market purchases to meet commitments or (2) counterparties fail to purchase the contracted quantities of natural gas or otherwise fail to perform. To the extent that we engage in hedging activities, we may be prevented from realizing the benefits of favorable price changes in the physical market. However, we are similarly insulated against unfavorable changes in such prices.

As of June 30, 2018, outstanding natural gas swap agreements, NGL swap agreements, swing swap agreements, storage swap agreements, and other derivative instruments were a net fair value liability of $15.6 million. The aggregate effect of a hypothetical 10% change, increase or decrease, in gas and NGL prices would result in a change of approximately $10.1 million in the net fair value of these contracts as of June 30, 2018. 

Interest Rate Risk

We are exposed to interest rate risk from the ENLC Credit Facility and the ENLK Credit Facility. At June 30, 2018, the ENLC Credit Facility had $84.4 million in outstanding borrowings, and the ENLK Credit Facility had $520.0 million in outstanding borrowings. A 1% increase or decrease in interest rates would change the annualized interest expense by approximately $0.8 million for the ENLC Credit Facility and $5.2 million for the ENLK Credit Facility.

We are not exposed to changes in interest rates with respect to ENLK’s senior unsecured notes due in 2019, 2024, 2025, 2026, 2044, 2045 or 2047 as these are fixed-rate obligations. The estimated fair value of ENLK’s senior unsecured notes was approximately$3,190.8 millionas ofJune 30, 2018, based on market prices of similar debt at June 30, 2018. Market risk is estimated as the potential decrease in fair value of our long-term debt resulting from a hypothetical increase of 1% in interest rates. Such an increase in interest rates would result in an approximate $228.4 milliondecrease in fair value of ENLK’s senior unsecured notes at June 30, 2018.

Item 4. Controls and Procedures

(a) Evaluation of Disclosure Controls and Procedures

We carried out an evaluation, under the supervision and with the participation of our management, including the Chief Executive Officer and Chief Financial Officer of EnLink Midstream Manager, LLC, of the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report pursuant to Exchange Act Rules 13a-15 and 15d-15. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of the period covered by this report (June 30, 2018), our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed by us in the reports we file or submit under the Securities Exchange Act of 1934 is recorded, processed, summarized, and reported within the time period specified in the applicable rules and forms, and that such information is accumulated and communicated to management, including the Chief Executive Officer and Chief Financial Officer, to allow timely decisions regarding required disclosure.

(b) Changes in Internal Control Over Financial Reporting

Effective January 1, 2018, we adopted ASC 606. The adoption of this accounting standard had no impact on our operating income, results of operations, financial condition, or cash flows. While the adoption of ASC 606 did not materially affect our internal control over financial reporting, we did implement certain changes to our related revenue recognition control activities, including changes to our policies related to the revenue recognition model, training, ongoing contract review requirements, and gathering of information to comply with disclosure requirements.Furthermore, there has been no change in our internal control over financial reporting that occurred in the three months endedJune 30, 2018 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II—OTHER INFORMATION

Item 1. Legal Proceedings

We are involved in various litigation and administrative proceedings arising in the normal course of business. In the opinion of management, any liabilities that may result from these claims would not individually or in the aggregate have a material adverse effect on our financial position, results of operations, or cash flows.

Item 1A. Risk Factors

The risk factors set forth below update and replace the corresponding risk factors set forth in our Annual Report on Form 10-K for the year ended December 31, 2017. Except as set forth below, information about risk factors does not differ materially from that set forth in Part I, “Item 1A. Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2017.

GIP owns approximately 63.8% of ENLC’s outstanding common units as of July 18, 2018 and controls the Managing Member, which has sole responsibility for conducting our business and managing our operations. Our Managing Member and GIP may have conflicts of interest with us, have limited duties to us, and may favor their own interests to the detriment of our unitholders.

GIP owns and controls the Managing Member and appoints all of the directors of the Managing Member. Some of the directors of the Managing Member are also officers of GIP. Although the Managing Member has a duty to manage us in a manner it subjectively believes to be in, or not opposed to, our best interests, the directors and officers of the Managing Member also have a duty to manage the Managing Member in a manner that is in the best interests of GIP, in its capacity as the sole member of the Managing Member. Conflicts of interest may arise in the future among GIP and its affiliates, including the Managing Member, on the one hand, and us and our unitholders, on the other hand. In resolving these conflicts of interest, the Managing Member may favor its own interests and those of its affiliates, including GIP, over our interests. Subject to certain limitations, these conflicts include, among others, the following situations:

• neither our operating agreement nor any other agreement requires GIP to pursue a business strategy that favors us, to enter into any commercial agreements with us or ENLK, or to sell any assets to us or ENLK. GIP’s officers have a fiduciary duty to make decisions in the best interests of the owners of GIP, which may be contrary to our interests;

• the Managing Member determines the amount and timing of asset purchases and sales, borrowings, issuance of additional membership interests, and the creation, reduction, or increase of reserves, each of which can affect the amount of cash that is available to be distributed to unitholders;

• the Managing Member determines which costs incurred by its affiliates are reimbursable by us;

• the Managing Member is allowed to take into account the interests of parties other than us in exercising certain rights under our operating agreement, which limits its duties to our unitholders;

• our operating agreement limits the liability of, and eliminates and replaces the fiduciary duties that would otherwise be owed by, the Managing Member and also restricts the remedies available to our unitholders for actions that, without the provisions of the operating agreement, might constitute breaches of fiduciary duty;

• any future contracts between us, on the one hand, and the Managing Member and its affiliates, on the other, will not be the result of arm’s-length negotiations, and disputes may arise under any such future contracts;

• except in limited circumstances, the Managing Member has the power and authority to conduct our business without unitholder approval;

• the Managing Member may exercise its right to call and purchase all of ENLC’s outstanding common units not owned by it and its affiliates if it and its affiliates own more than 90% of ENLC’s outstanding common units;

• the Managing Member controls the enforcement of obligations owed to us by the Managing Member and its affiliates, including commercial agreements; and

59

• the Managing Member decides whether to retain separate counsel, accountants, or others to perform services for us.

GIP is not limited in its ability to compete with us and is not obligated to offer us the opportunity to acquire additional assets or businesses, which could limit our ability to grow and could adversely affect our results of operations and cash available for distribution to our unitholders.

GIP is not prohibited from owning assets or interests in entities, or engaging in businesses, that compete directly or indirectly with us. GIP and its affiliates may acquire, construct, or dispose of additional midstream or other assets and may be presented with new business opportunities, without any obligation to offer us the opportunity to purchase or construct such assets or to engage in such business opportunities. Moreover, while GIP may offer us the opportunity to buy additional assets from it or its affiliates, GIP is not under a contractual obligation to do so and we are unable to predict whether or when such acquisitions might be completed. GIP is a private equity firm with significant resources and experience making investments in midstream energy businesses.

Pursuant to the terms of our operating agreement, the doctrine of corporate opportunity, or any analogous doctrine, does not apply to the Managing Member or any of its affiliates, including GIP and its officers. Any such person or entity that becomes aware of a potential transaction, agreement, arrangement or other matter that may be an opportunity for us will not have any duty to communicate or offer such opportunity to us. Any such person or entity will not be liable to us or to any limited partner for breach of any duty by reason of the fact that such person or entity pursues or acquires such opportunity for itself, directs such opportunity to another person or entity, or does not communicate such opportunity or information to us. As a result, competition from GIP and other affiliates of GIP could materially and adversely impact our results of operations and distributable cash flow. This may create actual and potential conflicts of interest between us and affiliates of the Managing Member and result in less than favorable treatment of us and our unitholders.

The control of our Managing Member may be transferred to a third party without unitholder consent.

Our Managing Member may transfer its managing member interest in us to a third party in a merger or in a sale of all or substantially all of its assets without the consent of the unitholders. Furthermore, our operating agreement does not restrict the ability of GIP to transfer all or a portion of the ownership interest in the Managing Member to a third party. If the managing member interest were transferred, the new owner of the Managing Member would then be in a position to replace the board of directors and officers of the Managing Member with its own choices and thereby exert significant control over the decisions made by such board of directors and officers. This effectively permits a “change of control” of the Managing Member without the vote or consent of the unitholders. On July 18, 2018, Devon sold its equity interests in us and our Managing Member to affiliates of GIP. For more information about the GIP transaction, see “Item 1. Financial Statements—Note 15.”

GIP has pledged all of the equity interests that it owns in us, the Managing Member and ENLK to GIP’s lenders under its credit facility. A default under GIP’s credit facility could have an adverse effect on the price of our common units and could result in a change of control of the Managing Member.

GIP has pledged all of the equity interests that it owns in us, the Managing Member and ENLK to its lenders as security under GIP’s senior secured credit facility. Although we are not a party to this credit facility, if a default under such credit facility were to occur, the lenders could foreclose on the pledged equity interests. Any such foreclosure on our common units could have an adverse effect on the market price of our common units. In addition, any foreclosure on GIP’s interest in the Managing Member would allow the new owner of the Managing Member to replace the board of directors and officers of the Managing Member with its own designees and to control the decisions taken by the board of directors and officers. Moreover, any change of control of the Managing Member could permit the lenders under our credit facility to declare all amounts thereunder immediately due and payable, and if any such event occurs, we may be required to refinance our debt on unfavorable terms, which could negatively impact our results of operations and our ability to make distributions to our unitholders.

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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

During the three months ended June 30, 2018, we re-acquired ENLC common units from certain employees in order to satisfy the employees’ tax liability in connection with the vesting of restricted incentive units.

Period	Total Number of Units Purchased (1)	Average Price Paid Per Unit		Total Number of Units Purchased as Part of Publicly Announced Plans or Programs	Maximum Number of Units that May Yet Be Purchased under the Plans or Programs
April 1, 2018 to April 30, 2018	3,942	$	14.49	—	—
May 1, 2018 to May 31, 2018	68	15.40		—	—
June 1, 2018 to June 30, 2018	3,001	17.01		—	—
Total	7,011	$	15.58	—	—

_________________

(1) The common units were not re-acquired pursuant to any repurchase plan or program.

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Item 6. Exhibits

The exhibits filed as part of this report are as follows (exhibits incorporated by reference are set forth with the name of the registrant, the type of report and registration number or last date of the period for which it was filed, and the exhibit number in such filing):

Number		Description
3.1	—	Certificate of Formation of EnLink Midstream, LLC (incorporated by reference to Exhibit 3.1 to our Registration Statement on Form S-4, file No. 333-192419).
3.2	—	Certificate of Amendment to Certificate of Formation of EnLink Midstream, LLC (incorporated by reference to Exhibit 3.2 to our Registration Statement on Form S-4, file No. 333-192419).
3.3	—	First Amended and Restated Operating Agreement of EnLink Midstream, LLC, dated as of March 7, 2014 (incorporated by reference to Exhibit 3.1 to our Current Report on Form 8-K dated March 7, 2014, filed with the Commission on March 11, 2014, file No. 001-36336).
3.4	—	Certificate of Formation of EnLink Midstream Manager, LLC (incorporated by reference to Exhibit 3.12 to our Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2014, filed with the Commission on August 6, 2014, file No. 001-36336).
3.5	—	Certificate of Amendment to the Certificate of Formation of EnLink Midstream Manager, LLC (incorporated by reference to Exhibit 3.13 to our Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2014, filed with the Commission on August 6, 2014, file No. 001-36336).
3.6	—	Second Amended and Restated Limited Liability Company Agreement of EnLink Midstream Manager, LLC, dated as of July 18, 2018 (incorporated by reference to Exhibit 3.1 to our Current Report on Form 8-K dated July 17, 2018, filed with the Commission on July 23, 2018, file No. 001-36336).
3.7	—	Certificate of Formation of EnLink Midstream GP, LLC (incorporated by reference to Exhibit 3.7 to EnLink Midstream Partners, LP’s Registration Statement on Form S-1, file No. 333-97779).
3.8	—	Certificate of Amendment to the Certificate of Formation of EnLink Midstream GP, LLC (incorporated by reference to Exhibit 3.12 to EnLink Midstream Partners, LP’s Registration Statement on Form S-3, file No. 333-194465).
3.9	—	Fourth Amended and Restated Limited Liability Company Agreement of EnLink Midstream GP, LLC, dated as of July 18, 2018 (incorporated by reference to Exhibit 3.2 to our Current Report on Form 8-K dated July 17, 2018, filed with the Commission on July 23, 2018, file No. 001-36366).
3.10	—	Certificate of Limited Partnership of EnLink Midstream Partners, LP (incorporated by reference to Exhibit 3.1 to EnLink Midstream Partners, LP’s Registration Statement on Form S-1, file No. 333-97779).
3.11	—	Certificate of Amendment to the Certificate of Limited Partnership of EnLink Midstream Partners, LP (incorporated by reference to Exhibit 3.2 to EnLink Midstream Partners, LP’s Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2012, filed with the Commission on August 7, 2012, file No. 000-50067).
3.12	—	Second Amendment to the Certificate of Limited Partnership of EnLink Midstream Partners, LP (incorporated by reference to Exhibit 3.3 to EnLink Midstream Partners, LP’s Current Report on Form 8-K dated March 6, 2014, filed with the Commission on March 11, 2014, file No. 001-36340).
3.13	—	Third Amendment to the Certificate of Limited Partnership of EnLink Midstream Partners, LP (incorporated by reference to Exhibit 3.1 to EnLink Midstream Partners, LP’s Current Report on Form 8-K dated June 16, 2017, filed with the Commission on June 19, 2017, file No. 001-36340).
3.14	—	Ninth Amended and Restated Agreement of Limited Partnership of EnLink Midstream Partners, LP, dated as of September 21, 2017 (incorporated by reference to Exhibit 3.1 to EnLink Midstream Partners, LP’s Current Report on Form 8-K dated September 21, 2017, filed with the Commission on September 21, 2017, file No. 001-36340).
3.15	—	Amendment No. 1 to Ninth Amended and Restated Agreement of Limited Partnership of EnLink Midstream Partners, LP, dated as of December 12, 2017 (incorporated by reference to Exhibit 3.1 to EnLink Midstream Partners, LP’s Current Report on Form 8-K dated December 12, 2017, filed with the Commission on December 14, 2017, file No. 001-36340).
10.1	—	Second Amendment to Credit Agreement and Limited Consent, dated as of June 20, 2018, by and among EnLink Midstream, LLC, Bank of America, N.A., as Administrative Agent, and the lenders party thereto (incorporated by reference to Exhibit 10.1 to our Current Report on Form 8-K dated June 20, 2018, filed with the Commission on June 25, 2018, file No. 001-36336).
10.2	—	Second Amendment to Credit Agreement and Limited Consent, dated as of June 20, 2018, by and among EnLink Midstream Partners, LP, Bank of America, N.A., as Administrative Agent, and the lenders party thereto (incorporated by reference to Exhibit 10.2 to our Current Report on Form 8-K dated June 20, 2018, filed with the Commission on June 25, 2018, file No. 001-36336).
10.3	—	Form of Indemnification Agreement (incorporated by reference to Exhibit 10.1 to our Current Report on Form 8-K dated July 17, 2018, filed with the Commission on July 23, 2018, file No. 003-36336).
31.1 *	—	Certification of the Principal Executive Officer.
31.2 *	—	Certification of the Principal Financial Officer.
32.1 *	—	Certification of the Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. Section 1350.
101 *	—	The following financial information from EnLink Midstream, LLC's Quarterly Report on Form 10-Q for the quarter ended June 30, 2018, formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Balance Sheets as of June 30, 2018 and December 31, 2017, (ii) Consolidated Statements of Operations for the three and six months ended June 30, 2018 and 2017, (iii) Consolidated Statements of Changes in Members’ Equity for the six months ended June 30, 2018, (iv) Consolidated Statements of Cash Flows for the six months ended June 30, 2018 and 2017, and (v) the notes to Consolidated Financial Statements.

* Filed herewith.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	EnLink Midstream, LLC
	By:	EnLink Midstream Manager, LLC,
		its managing member
	By:	/s/ ERIC D. BATCHELDER
		Eric D. Batchelder
		Executive Vice President and Chief Financial Officer
August 1, 2018

63

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Michael J. Garberding, certify that:

1. I have reviewed this quarterly report on Form 10-Q of EnLink Midstream, LLC;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 1, 2018	/s/ MICHAEL J. GARBERDING
	Michael J. Garberding
	President and Chief Executive Officer
	(principal executive officer)

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Eric D. Batchelder, certify that:

1. I have reviewed this quarterly report on Form 10-Q of EnLink Midstream, LLC;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: August 1, 2018	/s/ ERIC D. BATCHELDER
	Eric D. Batchelder
	Chief Financial Officer
	(principal financial and accounting officer)

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of EnLink Midstream, LLC (the “Registrant”) on Form 10-Q of EnLink Midstream, LLC for the quarter ended June 30, 2018 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned, Michael J. Garberding, Chief Executive Officer of EnLink Midstream Manager, LLC, and Eric D. Batchelder, Chief Financial Officer of EnLink Midstream Manager, LLC, certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to his knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date: August 1, 2018	/s/ MICHAEL J. GARBERDING
	Michael J. Garberding
	Chief Executive Officer
Date: August 1, 2018	/s/ ERIC D. BATCHELDER
	Eric D. Batchelder
	Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to the Registrant and will be retained by the Registrant and furnished to the Securities and Exchange Commission or its staff upon request. The foregoing certification is being furnished to the Securities and Exchange Commission as an exhibit to the Report.

XML

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Jul. 26, 2018
Entity Information [Abstract]
Document Type	10-Q
Document Fiscal Period Focus	Q2
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Amendment Flag	false
Entity Registrant Name	Enlink Midstream, LLC
Entity Central Index Key	0001592000
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		181,132,896

XML

Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 36.8	$ 31.2
Accounts receivable:
Trade, net of allowance for bad debt of $0.3 and $0.3, respectively	73.2	50.1
Accrued revenue and other	579.4	576.6
Related party	122.7	102.8
Fair value of derivative assets	4.0	6.8
Natural gas and NGLs inventory, prepaid expenses, and other	99.1	41.2
Total current assets	915.2	808.7
Property and equipment, net of accumulated depreciation of $2,745.8 and $2,533.0, respectively	6,763.2	6,587.0
Intangible assets, net of accumulated amortization of $360.4 and $298.7, respectively	1,435.4	1,497.1
Goodwill	1,542.2	1,542.2
Investment in unconsolidated affiliates	85.5	89.4
Other assets, net	42.1	13.4
Total assets	10,783.6	10,537.8
Current liabilities:
Accounts payable and drafts payable	115.2	66.9
Accounts payable to related party	30.5	16.3
Accrued gas, NGLs, condensate, and crude oil purchases	509.2	476.1
Fair value of derivative liabilities	10.7	8.4
Installment payable, net of discount of $0.5 at December 31, 2017	0.0	249.5
Current maturities of long-term debt	483.7	0.0
Other current liabilities	206.4	222.9
Total current liabilities	1,355.7	1,040.1
Long-term debt	3,590.2	3,542.1
Asset retirement obligations	14.5	14.2
Other long-term liabilities	21.2	33.9
Deferred tax liability	358.0	346.2
Fair value of derivative liabilities	8.9	0.0
Redeemable non-controlling interest	4.6	4.6
Members’ equity:
Members’ equity (181,051,875 and 180,600,728 units issued and outstanding, respectively)	1,871.9	1,924.2
Accumulated other comprehensive loss	(2.0)	(2.0)
Non-controlling interest	3,560.6	3,634.5
Total members’ equity	5,430.5	5,556.7
Total liabilities and members’ equity	$ 10,783.6	$ 10,537.8

XML

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
ASSETS
Allowance for bad debt	$ 0.3	$ 0.3
Property and equipment, accumulated depreciation	2,745.8	2,533.0
Intangible assets, accumulated amortization	360.4	298.7
Liabilities:
Current installment payable discount	$ 0.0	$ 0.5
Members’ equity:
Common units issued (in shares)	181,051,875	180,600,728
Common units outstanding (in shares)	181,051,875	180,600,728

XML

Consolidated Statements of Operations - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues:
Product sales		$ 1,435.1	$ 927.2	$ 2,934.3	$ 1,917.2
Product sales—related parties		27.2	29.3	30.8	72.0
Midstream services		142.4	131.9	234.6	259.3
Midstream services—related parties		175.2	173.6	341.4	332.6
Gain (loss) on derivative activity		(15.2)	1.6	(14.7)	4.4
Total revenues		1,764.7	1,263.6	3,526.4	2,585.5
Operating costs and expenses:
Cost of sales	[1]	1,325.6	932.4	2,707.1	1,934.7
Operating expenses		113.4	102.6	222.6	206.7
General and administrative		30.4	31.1	57.9	67.2
(Gain) loss on disposition of assets		1.2	(5.4)	1.3	(0.3)
Depreciation and amortization		145.3	142.5	283.4	270.8
Impairments		0.0	0.0	0.0	7.0
Gain on litigation settlement		0.0	(8.5)	0.0	(26.0)
Total operating costs and expenses		1,615.9	1,194.7	3,272.3	2,460.1
Operating income		148.8	68.9	254.1	125.4
Other income (expense):
Interest expense, net of interest income		(44.6)	(47.7)	(89.1)	(92.6)
Gain on extinguishment of debt		0.0	9.0	0.0	9.0
Income (loss) from unconsolidated affiliates		4.4	(0.1)	7.4	0.6
Other income (expense)		(0.1)	0.2	0.2	0.2
Total other expense		(40.3)	(38.6)	(81.5)	(82.8)
Income before non-controlling interest and income taxes		108.5	30.3	172.6	42.6
Income tax provision		(6.3)	(3.2)	(13.3)	(6.2)
Net income		102.2	27.1	159.3	36.4
Net income attributable to non-controlling interest		74.2	21.2	118.9	32.4
Net income attributable to ENLC		$ 28.0	$ 5.9	$ 40.4	$ 4.0
Net income attributable to ENLC per unit:
Basic common unit (in dollars per share)		$ 0.15	$ 0.03	$ 0.22	$ 0.02
Diluted common unit (in dollars per share)		$ 0.15	$ 0.03	$ 0.22	$ 0.02

[1] Includes related party cost of sales of $46.7 million and $50.9 million for the three months ended June 30, 2018 and 2017, respectively, and $80.8 million and $79.6 million for the six months ended June 30, 2018 and 2017, respectively.

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Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Related party cost of sales	$ 46.7	$ 50.9	$ 80.8	$ 79.6

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Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 102.2	$ 27.1	$ 159.3	$ 36.4
Loss on designated cash flow hedge, net of tax benefit of $0.2 million for the three and six months ended June 30, 2017	0.0	(2.0)	0.0	(2.0)
Comprehensive income	102.2	25.1	159.3	34.4
Comprehensive income attributable to non-controlling interest	74.2	19.6	118.9	30.8
Comprehensive income attributable to EnLink Midstream, LLC	$ 28.0	$ 5.5	$ 40.4	$ 3.6

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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Loss on designated cash flow hedge, tax benefit	$ 0.0	$ 0.2	$ 0.0	$ 0.2

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Consolidated Statement of Changes in Members' Equity - 6 months ended Jun. 30, 2018 - 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, 2017	$ 5,556.7	$ 1,924.2	$ (2.0)	$ 3,634.5
Units outstanding, beginning balance (in shares) at Dec. 31, 2017	180,600,728	180,600,000
Increase (Decrease) in Members' Equity
Issuance of common units by ENLK	$ 0.9			0.9
Conversion of restricted units for common units, net of units withheld for taxes	(3.5)	$ (3.5)
Conversion of restricted units for common units, net of units withheld for taxes (in shares)		500,000
Non-controlling interest’s impact of conversion of restricted units	(3.4)			(3.4)
Unit-based compensation	16.8	$ 8.4		8.4
Change in equity due to issuance of units by ENLK	0.6	(1.9)		2.5
Contributions from non-controlling interests	54.3			54.3
Distributions	(351.2)	(95.7)		(255.5)
Net income	159.3	40.4		118.9
Member equity, end balance at Jun. 30, 2018	$ 5,430.5	$ 1,871.9	$ (2.0)	$ 3,560.6
Units outstanding, end balance (in shares) at Jun. 30, 2018	181,051,875	181,100,000
Redeemable noncontrolling interest, beginning balance at Dec. 31, 2017					$ 4.6
Redeemable noncontrolling interest, ending balance at Jun. 30, 2018					$ 4.6

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Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 159.3	$ 36.4
Adjustments to reconcile net income to net cash provided by operating activities:
Impairments	0.0	7.0
Depreciation and amortization	283.4	270.8
Non-cash unit-based compensation	14.7	28.7
(Gain) loss on derivatives recognized in net income	14.7	(4.4)
Gain on extinguishment of debt	0.0	(9.0)
Cash settlements on derivatives	(0.4)	(6.0)
Amortization of debt issue costs, net discount (premium) of notes and installment payable	2.5	14.3
Distribution of earnings from unconsolidated affiliates	9.5	0.0
Income from unconsolidated affiliates	(7.4)	(0.6)
Non-cash revenue from contract restructuring	(45.5)	0.0
Other operating activities	13.2	5.8
Changes in assets and liabilities, net of assets acquired and liabilities assumed:
Accounts receivable, accrued revenue, and other	(46.7)	56.2
Natural gas and NGLs inventory, prepaid expenses, and other	(40.1)	(34.0)
Accounts payable, accrued gas and crude oil purchases, and other accrued liabilities	72.1	(36.1)
Net cash provided by operating activities	429.3	329.1
Cash flows from investing activities:
Additions to property and equipment	(404.4)	(471.7)
Proceeds from sale of unconsolidated affiliate investment	0.0	189.7
Investment in unconsolidated affiliates	(0.1)	(10.3)
Distribution from unconsolidated affiliates in excess of earnings	1.9	7.4
Other investing activities	0.8	1.3
Net cash used in investing activities	(401.8)	(283.6)
Cash flows from financing activities:
Proceeds from borrowings	1,361.8	1,800.2
Payments on borrowings	(832.0)	(1,384.9)
Payment of installment payable for EOGP acquisition	(250.0)	(250.0)
Debt financing costs	0.0	(5.7)
Conversion of restricted units, net of units withheld for taxes	(3.5)	(4.8)
Conversion of ENLK's restricted units, net of units withheld for taxes	(3.4)	(5.1)
Proceeds from issuance of ENLK common units	0.9	72.2
Distribution to members	(95.7)	(92.9)
Distributions to non-controlling partners	(255.5)	(202.9)
Contributions by non-controlling interests	54.3	28.5
Other financing activities	1.2	(0.4)
Net cash used in financing activities	(21.9)	(45.8)
Net increase (decrease) in cash and cash equivalents	5.6	(0.3)
Cash and cash equivalents, beginning of period	31.2	11.7
Cash and cash equivalents, end of period	36.8	11.4
Supplemental disclosures of cash flow information:
Cash paid for interest	89.1	79.1
Cash paid for income taxes	0.4	3.6
Non-cash investing activities:
Non-cash accrual of property and equipment	(5.0)	(5.2)
Discounted secured term loan receivable from contract restructuring	$ 47.7	$ 0.0

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General

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

General

(1) General

In this report, the terms “Company” or “Registrant,” as well as the terms “ENLC,” “our,” “we,” “us,” or like terms, are sometimes used as abbreviated references to EnLink Midstream, LLC itself or EnLink Midstream, LLC together with its consolidated subsidiaries, including ENLK and its consolidated subsidiaries. References in this report to “EnLink Midstream Partners, LP,” the “Partnership,” “ENLK,” or like terms refer to EnLink Midstream Partners, LP itself or EnLink Midstream Partners, LP together with its consolidated subsidiaries, including the Operating Partnership and EOGP.

Please read the notes to the consolidated financial statements in conjunction with the Definitions page set forth in this report prior to Part I—Financial Information.

(a) Organization of Business

EnLink Midstream, LLC is a publicly traded Delaware limited liability company formed in October 2013. The Company’s common units are traded on the New York Stock Exchange under the symbol “ENLC.”

Our assets consist of equity interests in ENLK and EOGP. ENLK is a publicly traded limited partnership formed on July 12, 2002 and is engaged in the gathering, transmission, processing, and marketing of natural gas, NGLs, condensate, and crude oil, as well as providing crude oil, condensate, and brine services to producers. EOGP is a partnership held by us and ENLK and is engaged in the gathering and processing of natural gas. As ofJune 30, 2018, our direct and indirect interests in ENLK and EOGP consisted of the following:

• 88,528,451common units representing an aggregate21.6%limited partner interest in ENLK;

• 100%ownership interest in the General Partner of ENLK, which owns a0.4%general partner interest and all of the incentive distribution rights in ENLK; and

• 16.1%limited partner interest in EOGP

Prior to July 18, 2018, subsidiaries of Devon collectively owned a100%equity interest in ENLC’s managing member, common units of ENLC representing approximately63.8%of the outstanding limited liability company interests in ENLC, and approximately23.1%of the outstanding limited partner interests in ENLK. On July 18, 2018, the Devon subsidiaries sold all of these interests to GIP. SeeNote 15—Subsequent Event for more information regarding this transaction.

(b) Nature of Business

We primarily focus on providing midstream energy services, including:

• gathering, compressing, treating, processing, transporting, storing, and selling natural gas;

• fractionating, transporting, storing, and selling NGLs; and

• gathering, transporting, stabilizing, storing, trans-loading, and selling crude oil and condensate, in addition to brine disposal services.

Our natural gas business includes connecting the wells of producers in our market areas to our gathering systems. Our gathering systems consist of networks of pipelines that collect natural gas from points at or near producing wells and transport it to our processing plants or to larger pipelines for further transmission. We operate processing plants that remove NGLs from the natural gas stream that is transported to the processing plants by our own gathering systems or by third-party pipelines. In conjunction with our gathering and processing business, we may purchase natural gas and NGLs from producers and other supply sources and sell that natural gas or NGLs to utilities, industrial consumers, marketers, and pipelines. Our transmission pipelines receive natural gas from our gathering systems and from third-party gathering and transmission systems and deliver natural gas to industrial end-users, utilities, and other pipelines.

Our fractionators separate NGLs into separate purity products, including ethane, propane, iso-butane, normal butane, and natural gasoline. Our fractionators receive NGLs primarily through our transmission lines that transport NGLs from East Texas and from our South Louisiana processing plants. Our fractionators also have the capability to receive NGLs by truck or rail terminals. We also have agreements pursuant to which third parties transport NGLs from our West Texas and Central Oklahoma operations to our NGL transmission lines that then transport the NGLs to our fractionators. In addition, we have NGL storage capacity to provide storage for customers.

Our crude oil and condensate business includes the gathering and transmission of crude oil and condensate via pipelines, barges, rail, and trucks, in addition to condensate stabilization and brine disposal. We also purchase crude oil and condensate from producers and other supply sources and sell that crude oil and condensate through our terminal facilities to various markets.

Across our businesses, we primarily earn our fees through various fee-based contractual arrangements, which include stated fee-only contract arrangements or arrangements with fee-based components where we purchase and resell commodities in connection with providing the related service and earn a net margin as our fee. We earn our net margin under our purchase and resell contract arrangements primarily as a result of stated service-related fees that are deducted from the price of the commodities purchased. While our transactions vary in form, the essential element of most of our transactions is the use of our assets to transport a product or provide a processed product to an end-user or marketer at the tailgate of the plant, pipeline, or barge, truck, or rail terminal.

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Significant Accounting Policies

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Significant Accounting Policies

(2) Significant Accounting Policies

(a) Basis of Presentation

The accompanying consolidated financial statements are prepared in accordance with the instructions to Form 10-Q, are unaudited, and do not include all the information and disclosures required by GAAP for complete financial statements. All adjustments that, in the opinion of management, are necessary for a fair presentation of the results of operations for the interim periods have been made and are of a recurring nature unless otherwise disclosed herein. The results of operations for such interim periods are not necessarily indicative of results of operations for a full year. All significant intercompany balances and transactions have been eliminated in consolidation.

(b) Revenue Recognition

We generate the majority of our revenues from midstream energy services, including gathering, transmission, processing, fractionation, storage, condensate stabilization, brine services, and marketing, through various contractual arrangements, which include fee-based contract arrangements or arrangements where we purchase and resell commodities in connection with providing the related service and earn a net margin for our fee. While our transactions vary in form, the essential element of most of our transactions is the use of our assets to transport a product or provide a processed product to an end-user or marketer at the tailgate of the plant, pipeline, or barge, truck, or rail terminal. Revenues from both “Product sales” and “Midstream services” represent revenues from contracts with customers and are reflected on the consolidated statements of operations as follows:

• Product sales—Product sales represent the sale of natural gas, NGLs, crude oil, and condensate where the product is purchased and resold in connection with providing our midstream services as outlined above.

• Midstream services—Midstream services represent all other revenue generated as a result of performing our midstream services as outlined above.

Adoption of ASC 606

Effective January 1, 2018, we adopted ASC 606 using the modified retrospective method. ASC 606 replaces previous revenue recognition requirements in GAAP and requires entities to recognize revenue at an amount that reflects the consideration to which they expect to be entitled in exchange for transferring goods or services to a customer. ASC 606 also requires significantly expanded disclosures containing qualitative and quantitative information regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.

Evaluation of Our Contractual Performance Obligations

In adopting ASC 606, we evaluated our contracts with customers that are within the scope of ASC 606. In accordance with the new revenue recognition framework introduced by ASC 606, we identified our performance obligations under our contracts with customers. These performance obligations include:

• promises to perform midstream services for our customers over a specified contractual term and/or for a specified volume of commodities; and

• promises to sell a specified volume of commodities to our customers.

The identification of performance obligations under our contracts requires a contract-by-contract evaluation of when control, including the economic benefit, of commodities transfers to and from us (if at all). This evaluation of control changed the way we account for certain transactions effective January 1, 2018, specifically those contracts in which there is both a commodity purchase and a midstream service. For contracts where control of commodities transfers to us before we perform our services, we generally have no performance obligation for our services, and accordingly, we do not consider these revenue-generating contracts for purposes of ASC 606. Based on the control determination, all contractually-stated fees that are deducted from our payments to producers or other suppliers for commodities purchased are reflected as a reduction in the cost of such commodity purchases. Alternatively, for contracts where control of commodities transfers to us after we perform our services, we consider these contracts to contain performance obligations for our services. Accordingly, we consider the satisfaction of these performance obligations as revenue-generating and recognize the fees received for satisfying them as midstream service revenues over time as we satisfy our performance obligations. For contracts where control of commodities never transfers to us and we simply earn a fee for our services, we recognize these fees as midstream services revenues over time as we satisfy our performance obligations.

We also evaluate our contractual arrangements that contain a purchase and sale of commodities under the principal/agent provisions in ASC 606. For contracts where we possess control of the commodity and act as principal in the purchase and sale, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities when purchased. For contracts in which we do not possess control of the commodity and are acting as an agent, our consolidated statements of operations only reflect midstream services revenues that we earn based on the fees contained in the applicable contract.

Based on our review of our performance obligations in our contracts with customers, we changed the consolidated statement of operations classification for certain transactions from revenue to cost of sales or from cost of sales to revenue. For thethree and six months ended June 30, 2018, the reclassification of revenues and cost of sales resulted in a net decrease in revenue of approximately$163 million and $301 million, respectively, or 9% and 8%, respectively, compared to total revenues based on accounting prior to the adoption of ASC 606, with an equivalent net decrease in cost of sales. The change in total revenues as a result of the adoption of ASC 606 is made up of the following revenue line item changes (in millions):

	Increase (Decrease) in Revenue Due to ASC 606 Adoption
	Three Months Ended June 30, 2018			Six Months Ended June 30, 2018
Product sales	$	(46	)	$	(78	)
Product sales—related parties	(24		)	(46		)
Midstream services	(76		)	(153		)
Midstream services—related parties	(17		)	(24		)
Total	$	(163	)	$	(301	)

This change in accounting treatment had no impact on our operating income, net income, results of operations, financial condition, or cash flows.

Changes in Accounting Methodology for Certain Contracts

For NGL contracts in which we purchase raw mix NGLs and subsequently transport, fractionate, and market the NGLs, we accounted for these contracts prior to the adoption of ASC 606 as revenue-generating contracts in which the fees we earned for our services were recorded as midstream services revenue on the consolidated statements of operations. As a result of the adoption of ASC 606, we determined that the control, including the economic benefit, of commodities has passed to us once the raw mix NGLs have been purchased from the customer. Therefore, we now consider the contractually-stated fees to serve as pricing mechanisms that reduce the cost of such commodity purchased upon receipt of the raw mix NGLs, rather than being recorded as midstream services revenue. Upon sale of the NGLs to a third-party customer, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities purchased.

For our crude oil and condensate service contracts in which we purchase the commodity, we utilize a similar approach under ASC 606 as outlined above for NGL contracts. This treatment is consistent with our accounting for crude oil and condensate service contracts prior to the adoption of ASC 606.

For our natural gas gathering and processing contracts in which we perform midstream services and also purchase the natural gas, we accounted for these contracts prior to the adoption of ASC 606 as revenue-generating contracts in which all contractually-stated fees earned for our gathering and processing services were recorded as midstream services revenue on the statements of operations. As a result of the adoption of ASC 606, we must determine if economic control of the commodities has passed from the producer to us before or after we perform our services (if at all). Control is assessed on a contract-by-contract basis by analyzing each contract’s provisions, which can include provisions for: the customer to take its residue gas and/or NGLs in-kind; fixed or actual NGL or keep-whole recovery; commodity purchase prices at weighted average sales price or market index-based pricing; and various other contract-specific considerations. Based on this control assessment, our gathering and processing contracts fall into two primary categories:

• For gathering and processing contracts in which there is a commodity purchase and analysis of the contract provisions indicates that control, including the economic benefit, of the natural gas passes to us when the natural gas is brought into our system, we do not consider these contracts to contain performance obligations for our services. As control of the natural gas passes to us prior to performing our gathering and processing services, we are, in effect, performing our services for our own benefit. Based on this control determination, we consider the contractually-stated fees to serve as pricing mechanisms that reduce the cost of such commodity purchased upon receipt of the natural gas, rather than being recorded as midstream services revenue. Upon sale of the residue gas and/or NGLs to a third-party customer, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities purchased.

• For gathering and processing contracts in which there is a commodity purchase and analysis of the contract provisions indicates that control, including the economic benefit, of the natural gas does not pass to us until after the natural gas has been gathered and processed, we consider these contracts to contain performance obligations for our services. Accordingly, we consider the satisfaction of these performance obligations as revenue-generating, and we recognize the fees received for satisfying these performance obligations as midstream service revenues over time as we satisfy our performance obligations.

For midstream service contracts related to NGL, crude oil, or natural gas gathering and processing in which there is no commodity purchase or control of the commodity never passes to us and we simply earn a fee for our services, we consider these contracts to contain performance obligations for our services. Accordingly, we consider the satisfaction of these performance obligations as revenue-generating, and we recognize the fees received for satisfying these performance obligations as midstream service revenues over time as we satisfy our performance obligations. This treatment is consistent with our accounting for these contracts prior to the adoption of ASC 606.

For our natural gas transmission contracts, we determined that control of the natural gas never transfers to us and we simply earn a fee for our services. Therefore, we recognize these fees as midstream services revenues over time as we satisfy our performance obligations. This treatment is consistent with our accounting for natural gas transmission contracts prior to the adoption of ASC 606.

We also evaluate our commodity marketing contracts, under which we purchase and sell commodities in connection with our gas, NGL, crude, and condensate midstream services, pursuant to ASC 606, including the principal/agent provisions. For contracts in which we possess control of the commodity and act as principal in the purchase and sale of commodities, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities when purchased. For contracts in which we do not possess control of the commodity and are acting as agent, our consolidated statements of operations only reflect midstream services revenues that we earn based on the fees contained in the applicable contract. This treatment is consistent with our accounting for our commodity marketing contracts prior to the adoption of ASC 606.

Satisfaction of Performance Obligations and Recognition of Revenue

While ASC 606 alters the line item on which certain amounts are recorded on the consolidated statements of operations, ASC 606 did not significantly affect the timing of income and expense recognition on the consolidated statements of operations. Specifically, for our commodity sales contracts, we satisfy our performance obligations at the point in time at which the commodity transfers from us to the customer. This transfer pattern aligns with our billing methodology. Therefore, we recognize product sales revenue at the time the commodity is delivered and in the amount to which we have the right to invoice the customer, which is consistent with our accounting prior to the adoption of ASC 606. For our midstream service contracts that contain revenue-generating performance obligations, we satisfy our performance obligations over time as we perform the midstream service and as the customer receives the benefit of these services over the term of the contract. As permitted by ASC 606, we are utilizing the practical expedient that allows an entity to recognize revenue in the amount to which the entity has a right to invoice, since we have a right to consideration from our customer in an amount that corresponds directly with the value to the customer of our performance completed to date. Accordingly, we continue to recognize revenue over time as our midstream services are performed. Therefore, ASC 606 does not significantly affect the timing of revenue and expense recognition on our consolidated statements of operations, and no cumulative effect adjustment was made to the balance of equity upon our adoption of ASC 606.

We generally accrue one month of sales and the related natural gas, NGL, condensate, and crude oil purchases and reverse these accruals when the sales and purchases are invoiced and recorded in the subsequent month. Actual results could differ from the accrual estimates. We typically receive payment for invoiced amounts within one month, depending on the terms of the contract. We account for taxes collected from customers attributable to revenue transactions and remitted to government authorities on a net basis (excluded from revenues).

Minimum Volume Commitments and Firm Transportation Contracts

Certain gathering and processing agreements in our Texas, Oklahoma, and Crude and Condensate segments provide for quarterly or annual MVCs, including MVCs from Devon from certain of our Barnett Shale assets in North Texas and our Cana gathering and processing assets in Oklahoma. Under these agreements, our customers or suppliers (as “customers” and “suppliers” are determined per application of ASC 606) agree to ship and/or process a minimum volume of product on our systems over an agreed time period. If a customer or supplier under such an agreement fails to meet its MVC for a specified period, the customer is obligated to pay a contractually-determined fee based upon the shortfall between actual product volumes and the MVC for that period. Some of these agreements also contain make-up right provisions that allow a customer or supplier to utilize gathering or processing fees in excess of the MVC in subsequent periods to offset shortfall amounts in previous periods. We record revenue under MVC contracts during periods of shortfall when it is known that the customer cannot, or will not, make up the deficiency in subsequent periods. Deficiency fee revenue is included in midstream services revenues.

For our firm transportation contracts, we transport commodities owned by others for a stated monthly fee for a specified monthly quantity with an additional fee based on actual volumes. We include transportation fees from firm transportation contracts in our midstream services revenues.

The following table summarizes the expected impact to our consolidated statements of operations, resulting from either revenue or reductions to cost of sales, from MVC and firm transportation contractual provisions. All amounts in the table below reflect the contractually-stated MVC or firm transportation volumes specified for each period multiplied by the relevant deficiency or reservation fee. Actual amounts could differ due to the timing of revenue recognition or reductions to cost of sales resulting from make-up right provisions included in our agreements, as well as due to nonpayment or nonperformance by our customers. In addition, amounts in the table below do not represent the shortfall amounts we expect to collect under our MVC contracts as we generally do not expect volume shortfalls to equal the full amount of the contractual MVCs during these periods.

2018 (remaining)	$	388.4
2019	235.8
2020	224.8
2021	82.2
2022	71.9
Thereafter	231.2
Total	$	1,234.3

In May 2018, we restructured one of our natural gas gathering and processing contracts that included MVCs that were in effect through 2023. Prior to the contract restructuring, we expected$135.1 million in guaranteed future gross operating margin under the contract, generated from either revenue or reductions to cost of sales resulting from both gathering and processing fees as well as shortfall revenue under the MVCs. As a result of the contract restructuring, all MVC provisions were removed from the contract, and we and the counterparty entered into additional agreements pursuant to which: (i) the counterparty made a$19.7 million payment to us on the date of the contract restructuring to satisfy MVC revenue earned up to the date of the contract restructuring; (ii) the counterparty entered into a second lien secured term loan under which the counterparty will pay us$58.0 millionin principal payments in various installments ending in May 2023, with interest accruing on the loan balance at8.0%per annum beginning in 2020; and (iii) the counterparty granted to us a1.0%term overriding royalty interest through June 2034 in each well located on leasehold interests of the counterparty and connected to the gas gathering system that we operate. As a result of the contract restructuring and in accordance with ASC 606, we recognized$45.5 millionof midstream services revenue, which primarily represents the discounted present value of the second lien secured term loan receivable, in the Oklahoma segment in the second quarter of 2018. Pursuant to the contract restructuring, the terms of the restructured contract, other than the MVCs, are the same as the original contract, and we expect to continue recognizing gathering and processing fees on volumes delivered by the customer.

Contributions in Aid of Construction

The adoption of ASC 606 also alters how we account for contributions in aid of construction (“CIAC”). CIAC payments are lump sum payments from third parties to reimburse us for capital expenditures related to the construction of our operating assets and, in most cases, the connection of these operating assets to the third party’s assets. CIAC payments can be paid to us prior to the commencement of construction activities, during construction, or after construction has been completed. Prior to adoption of ASC 606 and in accordance with ASC 980, Regulated Operations (“ASC 980”), and the FERC Uniform System of Accounts, we reduced the balance of the related property and equipment by the amount of CIAC payments received. In doing so, CIAC payments previously affected the consolidated statements of operations through reduced depreciation expense over the useful lives of the related property and equipment. Upon adoption of ASC 606, we initially recognize CIAC payments received from customers as deferred revenue, which will be subsequently amortized into revenue over the term of the underlying operational contract. For CIAC payments from noncustomers and for payments related to the construction of regulated operating assets, we continue to reduce the balance of the related property and equipment in accordance with ASC 980 and the FERC Uniform System of Accounts. This change in our CIAC accounting policy was not material to our financial statements for thethree and six months ended June 30, 2018.

Disaggregation of Revenue and Presentation of Prior Periods

Based on the disclosure requirements of ASC 606, we are presenting revenues disaggregated based on the type of good or service in order to more fully depict the nature of our revenues. SeeNote 13—Segment Informationfor the revenue disaggregation information included in the segment information table for thethree and six months ended June 30, 2018. As we adopted ASC 606 using the modified retrospective method, only the consolidated statement of operations and revenue disaggregation information for thethree and six months ended June 30, 2018are presented to conform to ASC 606 accounting and disclosure requirements. Prior periods presented in the consolidated financial statements and accompanying notes were not restated in accordance with ASC 606.

(c) Accounting Standards to be Adopted in Future Periods

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842)—Amendments to the FASB Accounting Standards Codification (“ASU 2016-02”), which establishes ASC Topic 842, Leases (“ASC 842”). Under ASC 842, lessees will need to recognize virtually all of their leases on the balance sheet by recording a right-of-use asset and lease liability. Lessor accounting is similar to the current model, but updated to align with certain changes to the lessee model and the new revenue recognition standard. Existing sale-leaseback guidance is replaced with a new model applicable to both lessees and lessors. Additional revisions have been made to embedded leases, reassessment requirements, and lease term assessments including variable lease payment, discount rate, and lease incentives. ASC 842 is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those annual periods. Entities are required to adopt ASC 842 using a modified retrospective transition. We will adopt ASC 842 effective January 1, 2019. We are currently assessing the impact of adopting ASC 842 and are in the process of implementing a lease accounting software tool. This assessment includes the evaluation of our current lease contracts and the analysis of contracts that may contain lease components. While we cannot currently estimate the quantitative effect that ASC 842 will have on our consolidated financial statements, the adoption of ASC 842 will increase our asset and liability balances on the consolidated balance sheets due to the required recognition of right-of-use assets and corresponding lease liabilities for all lease obligations that are currently classified as operating leases. In addition, there are industry-specific concerns with the implementation of ASC 842 that will require further evaluation before we are able to fully assess the impact of ASC 842 on our consolidated financial statements.

In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842)—Land Easement Practical Expedient for Transition to Topic 842 (“ASU 2018-01”). ASU 2018-01 amends ASC 842 and provides an optional practical expedient to not evaluate under ASC 842 existing or expired land easements that were not previously accounted for as leases under the current leases guidance in ASC 840, Leases. Under ASU 2018-01, an entity that elects this practical expedient should evaluate new or modified land easements under ASC 842 beginning at the date that the entity adopts ASC 842. We plan to utilize the practical expedient provided in ASU 2018-01 in conjunction with our adoption of ASC 842.

(d)    Property & Equipment

Impairment Review. In accordance with ASC 360, Property, Plant and Equipment, we evaluate long-lived assets of identifiable business activities for potential impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. The carrying amount of a long-lived asset is not recoverable when it exceeds the undiscounted sum of the future cash flows expected to result from the use and eventual disposition of the asset. Estimates of expected future cash flows represent management’s best estimate based on reasonable and supportable assumptions. When the carrying amount of a long-lived asset is not recoverable, an impairment loss is recognized equal to the excess of the asset’s carrying value over its fair value.For thesix months ended June 30, 2017, we recognized impairments of property and equipment of$7.0 million, which related to the carrying values of rights-of-way that we are no longer using and an abandoned brine disposal well. We did not recognize impairments for any other period presented in the consolidated statements of operations.

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Intangible Assets

6 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

(3) Intangible Assets

Intangible assets associated with customer relationships are amortized on a straight-line basis over the expected period of benefits of the customer relationships, which range from10 to 20 years.

The following table represents our change in carrying value of intangible assets (in millions):

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Six Months Ended June 30, 2018
Customer relationships, beginning of period	$	1,795.8	$	(298.7	)	$	1,497.1
Amortization expense	—		(61.7		)	(61.7		)
Customer relationships, end of period	$	1,795.8	$	(360.4	)	$	1,435.4

The weighted average amortization period is15.0 years. Amortization expense was $30.9 millionand$35.5 millionfor the three months endedJune 30, 2018and2017, respectively, and$61.7 millionand$65.0 millionfor thesixmonths endedJune 30, 2018and2017, respectively.

The following table summarizes our estimated aggregate amortization expense for the next five years and thereafter (in millions):

2018 (remaining)	$	61.8
2019	123.4
2020	123.4
2021	123.4
2022	123.4
Thereafter	880.0
Total	$	1,435.4

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Related Party Transactions

6 Months Ended

Jun. 30, 2018

Related Party Transactions [Abstract]

Related Party Transactions

(4) Related Party Transactions

We engage in various transactions with Devon and other related parties. For the three and six months ended June 30, 2018, Devon accounted for 11.5% and 10.6%of our revenues, respectively, and for thethree and sixmonths endedJune 30, 2017, Devon accounted for15.8%and15.3%of our revenues, respectively. We had an accounts receivable balance related to transactions with Devon of $122.1 million at June 30, 2018 and $102.7 million at December 31, 2017. Additionally, we had an accounts payable balance related to transactions with Devon of $27.0 million at June 30, 2018 and $16.3 million at December 31, 2017.

On July 18, 2018, subsidiaries of Devon sold all of their equity interests in ENLK, ENLC, and the managing member of ENLC to GIP. Accordingly, Devon is no longer an affiliate of ENLK or ENLC. The sale did not affect our commercial arrangements with Devon, except that Devon agreed to extend through 2029 certain existing, fixed-fee gathering and processing contracts related to the Bridgeport plant in North Texas and the Cana plant in Oklahoma. SeeNote 15—Subsequent Eventfor additional information regarding Devon’s sale to GIP.

For thethree and sixmonths endedJune 30, 2018, we recorded cost of sales of$9.5 millionand$22.5 million, respectively, and for thethree and sixmonths endedJune 30, 2017, we recorded cost of sales of$4.3 millionand$5.5 million, respectively, related to our purchase of residue gas and NGLs from the Cedar Cove JV subsequent to processing at our Central Oklahoma processing facilities.We had an accounts receivable balance related to transactions with Cedar Cove of$0.6 million at June 30, 2018. Additionally, we had an accounts payable balance related to transactions with Cedar Cove of$3.5 million at June 30, 2018. The accounts receivable and payable balances related to transactions with Cedar Cover were immaterial atDecember 31, 2017.

Management believes these transactions are executed on terms that are fair and reasonable to us. The amounts related to related party transactions are specified in the accompanying consolidated financial statements.

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Long-Term Debt

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Long-Term Debt

(5) Long-Term Debt

As of June 30, 2018 and December 31, 2017, long-term debt consisted of the following (in millions):

	June 30, 2018								December 31, 2017
	Outstanding Principal		Premium (Discount)			Long-Term Debt			Outstanding Principal		Premium (Discount)			Long-Term Debt
ENLK credit facility due 2020 (1)	$	520.0	$	—		$	520.0		$	—	$	—		$	—
ENLC credit facility due 2019 (2)	84.4		—			84.4			74.6		—			74.6
ENLK’s 2.70% Senior unsecured notes due 2019	400.0		(0.1		)	399.9			400.0		(0.1		)	399.9
ENLK’s 4.40% Senior unsecured notes due 2024	550.0		2.0			552.0			550.0		2.2			552.2
ENLK’s 4.15% Senior unsecured notes due 2025	750.0		(0.9		)	749.1			750.0		(1.0		)	749.0
ENLK’s 4.85% Senior unsecured notes due 2026	500.0		(0.6		)	499.4			500.0		(0.6		)	499.4
ENLK’s 5.60% Senior unsecured notes due 2044	350.0		(0.2		)	349.8			350.0		(0.2		)	349.8
ENLK’s 5.05% Senior unsecured notes due 2045	450.0		(6.3		)	443.7			450.0		(6.5		)	443.5
ENLK's 5.45% Senior unsecured notes due 2047	500.0		(0.1		)	499.9			500.0		(0.1		)	499.9
Debt classified as long-term, including current maturities of long-term debt	$	4,104.4	$	(6.2	)	$	4,098.2		$	3,574.6	$	(6.3	)	$	3,568.3
Debt issuance cost (3)						(24.3		)						(26.2		)
Less: Current maturities of long-term debt (4)						(483.7		)						—
Long-term debt, net of unamortized issuance cost						$	3,590.2							$	3,542.1

(1) Bears interest based on Prime and/or LIBOR plus an applicable margin. The effective interest rate was3.6%atJune 30, 2018.

(2) Bears interest based on Prime and/or LIBOR plus an applicable margin. The effective interest rate was 3.9% and 3.2% at June 30, 2018 and December 31, 2017, respectively.

(3) Net of amortization of $14.8 million and $12.9 million at June 30, 2018 and December 31, 2017, respectively.

(4) The outstanding balance, net of debt issuance costs, of the ENLC Credit Facility and ENLK’s2.70%senior unsecured notes as ofJune 30, 2018are classified as “Current maturities of long-term debt” on the consolidated balance sheet as the ENLC Credit Facility matures on March 7, 2019, and ENLK’s 2.70% senior unsecured notes mature on April 1, 2019.

ENLC Credit Facility

The ENLC Credit Facility is a $250.0 million revolving credit facility that matures on March 7, 2019 and includes a $125.0 million letter of credit subfacility. Our obligations under the ENLC Credit Facility are guaranteed by two of our wholly-owned subsidiaries and secured by first priority liens on (i) 88,528,451 ENLK common units and the 100% membership interest in the General Partner indirectly held by us, (ii) the 100% equity interest in each of our wholly-owned subsidiaries held by us, and (iii) any additional equity interests subsequently pledged as collateral under the ENLC Credit Facility.

The ENLC Credit Facility contains certain financial, operational, and legal covenants. The financial covenants are tested on a quarterly basis, based on the rolling four-quarter period that ends on the last day of each fiscal quarter, and include (i) maintaining a maximum consolidated leverage ratio (as defined in the ENLC Credit Facility, but generally computed as the ratio of consolidated funded indebtedness to consolidated earnings before interest, taxes, depreciation, amortization, and certain other non-cash charges) of 4.00 to 1.00, provided that the maximum consolidated leverage ratio is 4.50 to 1.00 during an acquisition period (as defined in the ENLC Credit Facility) and (ii) maintaining a minimum consolidated interest coverage ratio (as defined in the ENLC Credit Facility, but generally computed as the ratio of consolidated earnings before interest, taxes, depreciation, amortization, and certain other non-cash charges to consolidated interest charges) of 2.50 to 1.00 unless an investment grade event (as defined in the ENLC Credit Facility) occurs.

Borrowings under the ENLC Credit Facility bear interest at our option at the Eurodollar Rate (the LIBOR Rate) plus an applicable margin (ranging from 1.75% to 2.50%) or the Base Rate (the highest of the Federal Funds Rate plus 0.50%, the 30-day Eurodollar Rate plus 1.0% or the administrative agent’s prime rate) plus an applicable margin (ranging from 0.75% to 1.50%). The applicable margins vary depending on our leverage ratio. Upon breach by us of certain covenants governing the ENLC Credit Facility, amounts outstanding under the ENLC Credit Facility, if any, may become due and payable immediately and the liens securing the ENLC Credit Facility could be foreclosed upon.

On June 20, 2018, we amended the change of control provisions of the ENLC Credit Facility to, among other things, designate GIP as Qualifying Owners (as defined in the ENLC Credit Facility). At June 30, 2018, ENLC was in compliance and expects to be in compliance with the covenants in the ENLC Credit Facility through its maturity date.

As of June 30, 2018, there were no outstanding letters of credit and $84.4 million in outstanding borrowings under the ENLC Credit Facility, leaving approximately $165.6 million available for future borrowing.

ENLK Credit Facility

The ENLK Credit Facility is a $1.5 billion unsecured revolving credit facility that matures on March 6, 2020 and includes a $500.0 millionletter of credit subfacility. Under the ENLK Credit Facility, ENLK is permitted to (1) subject to certain conditions and the receipt of additional commitments by one or more lenders, increase the aggregate commitments under the ENLK Credit Facility by an additional amount not to exceed $500.0 millionand (2) subject to certain conditions and the consent of the requisite lenders, ontwo separate occasions extend the maturity date of the ENLK Credit Facility by one yearon each occasion. The ENLK Credit Facility contains certain financial, operational, and legal covenants. Among other things, these covenants include maintaining a ratio of consolidated indebtedness to consolidated EBITDA (which is defined in the ENLK Credit Facility and includes projected EBITDA from certain capital expansion projects) of no more than 5.0 to 1.0. If ENLK consummates one or more acquisitions in which the aggregate purchase price is$50.0 million or more, ENLK can elect to increase the maximum allowed ratio of consolidated indebtedness to consolidated EBITDA to5.5 to 1.0 for the quarter of the acquisition and the three following quarters.

Borrowings under the ENLK Credit Facility bear interest at ENLK’s option at the Eurodollar Rate (the LIBOR Rate) plus an applicable margin (ranging from 1.00% to 1.75%) or the Base Rate (the highest of the Federal Funds Rate plus 0.50%, the 30-day Eurodollar Rate plus1.0%or the administrative agent’s prime rate) plus an applicable margin (ranging from0.0% to 0.75%). The applicable margins vary depending on ENLK’s credit rating. If ENLK breaches certain covenants governing the ENLK Credit Facility, amounts outstanding under the ENLK Credit Facility, if any, may become due and payable immediately.

On June 20, 2018, ENLK amended the change of control provisions of the ENLK Credit Facility to, among other things, designate GIP as Qualifying Owners (as defined in the ENLK Credit Facility). At June 30, 2018, ENLK was in compliance and expects to be in compliance with the covenants in the ENLK Credit Facility for at least the next twelve months.

As of June 30, 2018, there were $9.3 millionin outstanding letters of credit and $520.0 million outstanding borrowings under the ENLK Credit Facility, leaving approximately $970.7 million available for future borrowing.

All other material terms and conditions of the ENLC Credit Facility, the ENLK Credit Facility, and outstanding senior unsecured notes are described in Part II, “Item 8. Financial Statements and Supplementary Data—Note 6” in our Annual Report on Form 10-K for the year ended December 31, 2017.

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Income Taxes

6 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Income Taxes

(6) Income Taxes

Income taxes included on the consolidated financial statements were as follows for the periods presented (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018		2017
Current income tax provision (benefit)	$	(0.3	)	$	(1.0	)	$	0.9	$	(0.2	)
Deferred income tax provision	6.6			4.2			$	12.4	$	6.4
Total income tax provision	$	6.3		$	3.2		$	13.3	$	6.2

The following schedule reconciles total income tax expense and the amount calculated by applying the statutory U.S. federal tax rate to income before income taxes (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Expected income tax provision based on federal statutory rate (1)	$	7.2		$	3.1		$	11.3		$	3.5
State income taxes expense, net of federal tax benefit	0.8			0.3			1.3			0.3
Income tax expense (benefit) from ENLK	(2.0		)	(0.3		)	(1.0		)	0.2
Unit-based compensation	(0.1		)	—			1.5			2.3
Other	0.4			0.1			0.2			(0.1		)
Total income tax provision	$	6.3		$	3.2		$	13.3		$	6.2

(1) The statutory federal tax rate for corporations was 21% at June 30, 2018 and 35% at June 30, 2017.

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Certain Provisions of the Partnership Agreement

6 Months Ended

Jun. 30, 2018

Partners' Capital [Abstract]

Certain Provisions of the Partnership Agreement

(7) Certain Provisions of the Partnership Agreement

(a) Issuance of ENLK Common Units

In August 2017, ENLK entered into the 2017 EDA with UBS Securities LLC, Barclays Capital Inc., BMO Capital Markets Corp., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., Jefferies LLC, Mizuho Securities USA LLC, RBC Capital Markets, LLC, SunTrust Robinson Humphrey, Inc. and Wells Fargo Securities, LLC (collectively, the “Sales Agents”) to sell up to$600.0 million in aggregate gross sales of ENLK common units from time to time through an “at the market” equity offering program. ENLK may also sell common units to any Sales Agent as principal for the Sales Agent’s own account at a price agreed upon at the time of sale. ENLK has no obligation to sell any of the common units under the 2017 EDA and may at any time suspend solicitation and offers under the 2017 EDA.

For thesix months ended June 30, 2018, ENLK sold an aggregate of approximately0.1 millioncommon units under the 2017 EDA, generating proceeds of approximately$0.9 million(net of less than$0.1 millionof commissions paid to the Sales Agents). ENLK used the net proceeds for general partnership purposes. As of June 30, 2018, approximately $564.5 millionin aggregate gross proceeds remains available to be issued under the 2017 EDA.

(b) ENLK Series B Preferred Units

Beginning with the quarter ended September 30, 2017, Series B Preferred Unit distributions are payable quarterlyin cash at an amount equal to$0.28125 per Series B Preferred Unit (the “Cash Distribution Component”) plus an in-kind distribution equal to the greater of (A)0.0025Series B Preferred Units per Series B Preferred Unit and (B) an amount equal to (i) the excess, if any, of the distribution that would have been payable had the Series B Preferred Units converted into common units over the Cash Distribution Component, divided by (ii) the issue price of $15.00.

A summary of the distribution activity relating to the Series B Preferred Units during the six months ended June 30, 2018 and 2017 is provided below:

Declaration period	Distribution paid as additional Series B Preferred Units	Cash Distribution (in millions)		Date paid/payable
2018
Fourth Quarter of 2017	413,658	$	16.0	February 13, 2018
First Quarter of 2018	416,657	$	16.2	May 14, 2018
Second Quarter of 2018	419,678	$	16.3	August 13, 2018
2017
Fourth Quarter of 2016	1,130,131	$	—	February 13, 2017
First Quarter of 2017	1,154,147	$	—	May 12, 2017
Second Quarter of 2017	1,178,672	$	—	August 11, 2017

(c) ENLK Series C Preferred Units

Distributions on the Series C Preferred Units accrue and are cumulative from the date of original issue and payable semi-annually in arrears on the 15^th day of June and December of each year through and including December 15, 2022 and, thereafter, quarterly in arrears on the 15^th day of March, June, September, and December of each year, in each case, if and when declared by the General Partner out of legally available funds for such purpose. The distribution rate for the Series C Preferred Units is6.0%per annum, and ENLK distributed $12.0 million to holders of Series C Preferred Units during thesix months ended June 30, 2018.

(d) ENLK Common Unit Distributions

Unless restricted by the terms of the ENLK Credit Facility and/or the indentures governing ENLK’s senior unsecured notes, ENLK must make distributions of100%of available cash, as defined in its partnership agreement, within 45 daysfollowing the end of each quarter. Distributions of available cash are made to the General Partner in accordance with its current percentage interest with the remainder to the common unitholders, subject to the payment of incentive distributions as described below to the extent that certain target levels of cash distributions are achieved. The General Partner is not entitled to incentive distributions with respect to (i) distributions on theSeries B Preferred Units until such units convert into common units or (ii) the Series C Preferred Units.

The General Partner owns the general partner interest in ENLK and all incentive distribution rights in ENLK. The General Partner is entitled to receive incentive distributions if the amount ENLK distributes with respect to any quarter exceeds levels specified in its partnership agreement. Under the quarterly incentive distribution provisions, the General Partner is entitled to13.0% of amounts ENLK distributes in excess of $0.25 per unit, 23.0% of the amounts ENLK distributes in excess of $0.3125 per unit, and 48.0% of amounts ENLK distributes in excess of $0.375 per unit.

A summary of ENLK’s distribution activity relating to the common units during thesixmonths endedJune 30, 2018 and 2017 is provided below:

Declaration period	Distribution/unit		Date paid/payable
2018
Fourth Quarter of 2017	$	0.39	February 13, 2018
First Quarter of 2018	$	0.39	May 14, 2018
Second Quarter of 2018	$	0.39	August 13, 2018
2017
Fourth Quarter of 2016	$	0.39	February 13, 2017
First Quarter of 2017	$	0.39	May 12, 2017
Second Quarter of 2017	$	0.39	August 11, 2017

(e) Allocation of ENLK Income

Net income is allocated to the General Partner in an amount equal to its incentive distribution rights as described in section “(d) ENLK Common Unit Distributions” above. The General Partner’s share of net income consists of incentive distribution rights to the extent earned, a deduction for unit-based compensation attributable to ENLC’s restricted units, and the percentage interest of ENLK’s net income adjusted for ENLC’s unit-based compensation specifically allocated to the General Partner. The net income allocated to the General Partner is as follows (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Income allocation for incentive distributions	$	14.8		$	14.6		$	29.6		$	29.3
Unit-based compensation attributable to ENLC’s restricted units	(4.0		)	(3.9		)	(8.4		)	(12.7		)
General Partner share of net income	0.4			0.1			0.6			0.1
General Partner interest in net income	$	11.2		$	10.8		$	21.8		$	16.7

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Members' Equity

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Members' Equity

(8) Members' Equity

(a)Earnings Per Unit and Dilution Computations

As required under ASC 260, Earnings Per Share, unvested share-based payments that entitle employees to receive non-forfeitable distributions are considered participating securities for earnings per unit calculations. The following table reflects the computation of basic and diluted earnings per unit for the periods presented (in millions, except per unit amounts):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
ENLC interest in net income	$	28.0		$	5.9		$	40.4		$	4.0
Distributed earnings allocated to:
Common units (1) (2)	$	48.3		$	46.1		$	95.9		$	92.0
Unvested restricted units (1) (2)	0.8			0.6			1.3			1.2
Total distributed earnings	$	49.1		$	46.7		$	97.2		$	93.2
Undistributed loss allocated to:
Common units	$	(20.8	)	$	(40.3	)	$	(56.1	)	$	(88.1	)
Unvested restricted units	(0.3		)	(0.5		)	(0.7		)	(1.1		)
Total undistributed loss	$	(21.1	)	$	(40.8	)	$	(56.8	)	$	(89.2	)
Net income allocated to:
Common units	$	27.5		$	5.8		$	39.8		$	3.9
Unvested restricted units	0.5			0.1			0.6			0.1
Total net income	$	28.0		$	5.9		$	40.4		$	4.0
Basic and diluted net income per unit:
Basic	$	0.15		$	0.03		$	0.22		$	0.02
Diluted	$	0.15		$	0.03		$	0.22		$	0.02

(1) For the three months ended June 30, 2018 and 2017, distributed earnings represent a declared distribution of $0.267 per unit payable on August 14, 2018 and a distribution of $0.255 per unit paid on August 14, 2017, respectively.

(2) For the six months ended June 30, 2018, distributed earnings included a distribution of $0.263 per unit paid on May 15, 2018 and a declared distribution of $0.267 per unit payable on August 14, 2018. For the six months ended June 30, 2017, distributed earnings included distributions of $0.255 per unit paid on May 15, 2017 and $0.255 per unit paid on August 14, 2017.

The following are the unit amounts used to compute the basic and diluted earnings per unit for the periods presented (in millions):

	Three Months Ended June 30,		Six Months Ended June 30,
	2018	2017	2018	2017
Basic weighted average units outstanding:
Weighted average common units outstanding	181.0	180.6	181.0	180.4
Diluted weighted average units outstanding:
Weighted average basic common units outstanding	181.0	180.6	181.0	180.4
Dilutive effect of non-vested restricted units	1.2	1.1	1.0	1.2
Total weighted average diluted common units outstanding	182.2	181.7	182.0	181.6

All outstanding units were included in the computation of diluted earnings per unit and weighted based on the number of days such units were outstanding during the periods presented.

(b) Distributions

A summary of our distribution activity relating to the ENLC common units for the six months ended June 30, 2018 and 2017, respectively, is provided below:

Declaration period	Distribution/unit		Date paid/payable
2018
Fourth Quarter of 2017	$	0.259	February 14, 2018
First Quarter of 2018	$	0.263	May 15, 2018
Second Quarter 2018	$	0.267	August 14, 2018
2017
Fourth Quarter of 2016	$	0.255	February 14, 2017
First Quarter of 2017	$	0.255	May 15, 2017
Second Quarter 2017	$	0.255	August 14, 2017

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Investment in Unconsolidated Affiliates

6 Months Ended

Jun. 30, 2018

Equity Method Investments and Joint Ventures [Abstract]

Investment in Unconsolidated Affiliates

(9) Investment in Unconsolidated Affiliates

As of June 30, 2018, our unconsolidated investments consisted of a contractual right to the economic benefits and burdens associated with Devon’s 38.75%ownership in GCF and an approximate30% ownership in the Cedar Cove JV.

The following table shows the activity related to our investment in unconsolidated affiliates for the periods indicated (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
GCF
Distributions	$	5.4		$	4.4		$	11.1		$	7.1
Equity in income	$	4.8		$	—		$	9.4		$	4.0
HEP
Equity in loss (1)	$	—		$	—		$	—		$	(3.4	)
Cedar Cove JV
Contributions	$	0.1		$	4.3		$	0.1		$	10.3
Distributions	$	—		$	0.1		$	0.3		$	0.3
Equity in loss	$	(0.4	)	$	(0.1	)	$	(2.0	)	$	—
Total
Contributions	$	0.1		$	4.3		$	0.1		$	10.3
Distributions	$	5.4		$	4.5		$	11.4		$	7.4
Equity in income (loss) (1)	$	4.4		$	(0.1	)	$	7.4		$	0.6

(1) We sold our ownership interest in HEP during the first quarter of 2017, resulting in a loss of$3.4 million for the sixmonths ended June 30, 2017.

The following table shows the balances related to our investment in unconsolidated affiliates as ofJune 30, 2018 and December 31, 2017 (in millions):

	June 30, 2018		December 31, 2017
GCF	$	46.7	$	48.4
Cedar Cove JV	38.8		41.0
Total investment in unconsolidated affiliates	$	85.5	$	89.4

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Employee Incentive Plans

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Employee Incentive Plans

(10) Employee Incentive Plans

(a) Long-Term Incentive Plans

ENLC and ENLK each have similar unit-based compensation payment plans for officers and employees. ENLC grants unit-based awards under the EnLink Midstream, LLC 2014 Long-Term Incentive Plan (the “2014 Plan”), and ENLK grants unit-based awards under the amended and restated EnLink Midstream GP, LLC Long-Term Incentive Plan (the “GP Plan”).

We account for unit-based compensation in accordance with ASC 718, Stock Compensation (“ASC 718”), which requires that compensation related to all unit-based awards be recognized in the consolidated financial statements. Unit-based compensation cost is valued at fair value at the date of grant, and that grant date fair value is recognized as expense over each award’s requisite service period with a corresponding increase to equity or liability based on the terms of each award and the appropriate accounting treatment under ASC 718. Unit-based compensation associated with ENLC’s unit-based compensation plan awarded to ENLC’s officers and employees is recorded by us since ENLC has no substantial or managed operating activities other than its interests in ENLK and EOGP.

Amounts recognized on the consolidated financial statements with respect to these plans are as follows (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Cost of unit-based compensation charged to operating expense	$	2.3	$	2.6	$	4.3	$	7.6
Cost of unit-based compensation charged to general and administrative expense	7.3		6.7		10.4		21.1
Total unit-based compensation expense	$	9.6	$	9.3	$	14.7	$	28.7
Non-controlling interest in unit-based compensation	$	3.6	$	3.5	$	5.5	$	10.8
Amount of related income tax benefit recognized in net income (1)	$	1.2	$	2.1	$	1.9	$	6.7

(1) For the three and six months ended June 30, 2018, the amount of related income tax benefit recognized in net income excluded $0.1 million of income tax benefit and $1.5 million of income tax expense, respectively, related to tax deficiencies recorded upon vesting of restricted units. For the six months ended June 30, 2017, the amount of related income tax benefit recognized in net income excluded $2.3 million of income tax expense related to tax deficiencies recorded upon vesting of restricted units. There was no income tax expense or benefit related to tax deficiencies recorded upon vesting of restricted units for the three months ended June 30, 2017.

(b) EnLink Midstream Partners, LP Restricted Incentive Units

ENLK restricted incentive units are valued at their fair value at the date of grant, which is equal to the market value of ENLK common units on such date.A summary of the restricted incentive unit activity for thesix months ended June 30, 2018is provided below:

	Six Months Ended June 30, 2018
EnLink Midstream Partners, LP Restricted Incentive Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	1,980,224			$	15.81
Granted (1)	1,166,464			15.15
Vested (1)(2)	(601,581		)	22.04
Forfeited	(148,572		)	12.29
Non-vested, end of period	2,396,535			$	14.14
Aggregate intrinsic value, end of period (in millions)	$	37.2

(1) Restricted incentive units typically vest at the end of three years. In March 2018, ENLK granted 200,753restricted incentive units with a fair value of$3.0 millionto officers and certain employees as bonus payments for 2017, and these restricted incentive units vested immediately and are included in the restricted incentive units granted and vested line items.

(2) Vested units included189,584units withheld for payroll taxes paid on behalf of employees.

A summary of the restricted incentive units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thethree and six months ended June 30, 2018 and 2017 is provided below (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
EnLink Midstream Partners, LP Restricted Incentive Units:	2018		2017		2018		2017
Aggregate intrinsic value of units vested	$	0.4	$	0.4	$	9.1	$	15.7
Fair value of units vested	$	0.5	$	0.5	$	13.3	$	21.0

As of June 30, 2018, there was $20.2 million of unrecognized compensation cost related to non-vested ENLK restricted incentive units. That cost is expected to be recognized over a weighted-average period of 1.9 years.

(c) EnLink Midstream Partners, LP Performance Units

The General Partner grants performance awards under the GP Plan. The performance award agreements provide that the vesting of performance units (i.e., performance-based restricted incentive units) granted thereunder is dependent on the achievement of certain total shareholder return (“TSR”) performance goals relative to the TSR achievement of a peer group of companies (the “Peer Companies”) over the applicable performance period. The performance award agreements contemplate that the Peer Companies for an individual performance award (the “Subject Award”) are the companies comprising the AMZ, excluding ENLC and ENLK, on the grant date for the Subject Award. The performance units will vest based on the percentile ranking of the average of ENLC’s and ENLK’s TSR achievement (“EnLink TSR”) for the applicable performance period relative to the TSR achievement of the Peer Companies.

At the end of the vesting period, recipients receive distribution equivalents, if any, with respect to the number of performance units vested. The vesting of units ranges fromzero to 200% of the units granted depending on the EnLink TSR as compared to the TSR of the Peer Companies on the vesting date. The fair value of each performance unit is estimated as of the date of grant using a Monte Carlo simulation with the following assumptions used for all performance unit grants made under the plan: (i) a risk-free interest rate based on United States Treasury rates as of the grant date; (ii) a volatility assumption based on the historical realized price volatility of ENLK’s common units and the designated Peer Companies securities; (iii) an estimated ranking of ENLK among the designated Peer Companies; and (iv) the distribution yield. The fair value of the performance unit on the date of grant is expensed over a vesting period of approximately three years. The following table presents a summary of the grant-date fair value of performance units granted and the related assumptions by performance unit grant date:

EnLink Midstream Partners, LP Performance Units:	March 2018
Beginning TSR price	$	15.44
Risk-free interest rate	2.38		%
Volatility factor	43.85		%
Distribution yield	10.5		%

The following table presents a summary of the performance units:

	Six Months Ended June 30, 2018
EnLink Midstream Partners, LP Performance Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	585,285			$	20.52
Granted	256,345			19.24
Vested (1)	(115,328		)	35.39
Forfeited	(76,351		)	16.62
Non-vested, end of period	649,951			$	17.83
Aggregate intrinsic value, end of period (in millions)	$	10.1

(1) Vested units included34,069units withheld for payroll taxes paid on behalf of employees.

A summary of the performance units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thesixmonths endedJune 30, 2018is provided below (in millions). No performance units vested for the three months ended June 30, 2018 or for the three and six months ended June 30, 2017.

EnLink Midstream Partners, LP Performance Units:	Six Months Ended June 30, 2018
Aggregate intrinsic value of units vested	$	2.0
Fair value of units vested	$	4.1

As ofJune 30, 2018, there was$7.4 million of unrecognized compensation cost that related to non-vested ENLK performance units. That cost is expected to be recognized over a weighted-average period of 2.0 years.

(d) EnLink Midstream, LLC Restricted Incentive Units

ENLC restricted incentive units are valued at their fair value at the date of grant, which is equal to the market value of ENLC common units on such date.A summary of the restricted incentive unit activity for thesixmonths endedJune 30, 2018is provided below:

	Six Months Ended June 30, 2018
EnLink Midstream, LLC Restricted Incentive Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	1,889,310			$	16.33
Granted (1)	1,059,062			15.67
Vested (1)(2)	(556,262		)	24.24
Forfeited	(138,187		)	12.24
Non-vested, end of period	2,253,923			$	14.32
Aggregate intrinsic value, end of period (in millions)	$	37.1

(1) Restricted incentive units typically vest at the end of three years. In March 2018, ENLC granted194,185restricted incentive units with a fair value of$3.0 million to officers and certain employees as bonus payments for 2017, and these restricted incentive units vested immediately and are included in the restricted incentive units granted and vested line items.

(2) Vested units included178,824units withheld for payroll taxes paid on behalf of employees.

A summary of the restricted incentive units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thethree and six months ended June 30, 2018 and 2017is provided below (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
EnLink Midstream, LLC Restricted Incentive Units:	2018		2017		2018		2017
Aggregate intrinsic value of units vested	$	0.4	$	0.3	$	9.3	$	14.6
Fair value of units vested	$	0.4	$	0.4	$	13.5	$	20.8

As of June 30, 2018, there was $19.2 million of unrecognized compensation cost related to non-vested ENLC restricted incentive units. The cost is expected to be recognized over a weighted-average period of 1.9 years.

(e) EnLink Midstream, LLC’s Performance Units

ENLC grants performance awards under the 2014 Plan. The performance award agreements provide that the vesting of performance units (i.e., performance-based restricted incentive units) granted thereunder is dependent on the achievement of certain TSR performance goals relative to the TSR achievement of the Peer Companies over the applicable performance period. At the end of the vesting period, recipients receive distribution equivalents, if any, with respect to the number of performance units vested. The vesting of units ranges fromzero to 200%of the units granted depending on the EnLink TSR as compared to the TSR of the Peer Companies on the vesting date. The fair value of each performance unit is estimated as of the date of grant using a Monte Carlo simulation with the following assumptions used for all performance unit grants made under the plan: (i) a risk-free interest rate based on United States Treasury rates as of the grant date; (ii) a volatility assumption based on the historical realized price volatility of ENLC’s common units and the designated Peer Companies securities; (iii) an estimated ranking of ENLC among the designated Peer Companies, and (iv) the distribution yield. The fair value of the performance unit on the date of grant is expensed over a vesting period of approximatelythree years. The following table presents a summary of the grant-date fair value assumptions by performance unit grant date:

EnLink Midstream, LLC Performance Units:	March 2018
Beginning TSR price	$	16.55
Risk-free interest rate	2.38		%
Volatility factor	51.36		%
Distribution yield	6.7		%

The following table presents a summary of the performance units:

	Six Months Ended June 30, 2018
EnLink Midstream, LLC Performance Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	548,839			$	22.14
Granted	223,865			21.63
Vested (1)	(102,555		)	40.48
Forfeited	(70,918		)	17.75
Non-vested, end of period	599,231			$	19.33
Aggregate intrinsic value, end of period (in millions)	$	9.9

(1) Vested units included28,846units withheld for payroll taxes paid on behalf of employees.

A summary of the performance units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thesixmonths endedJune 30, 2018is provided below (in millions). No performance units vested for the three months ended June 30, 2018 or for the three and six months ended June 30, 2017.

EnLink Midstream, LLC Performance Units:	Six Months Ended June 30, 2018
Aggregate intrinsic value of units vested	$	1.9
Fair value of units vested	$	4.2

As of June 30, 2018, there was $7.5 million of unrecognized compensation cost that related to non-vested ENLC performance units. That cost is expected to be recognized over a weighted-average period of 2.0 years.

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Derivatives

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives

(11) Derivatives

Interest Rate Swaps

We periodically enter into interest rate swaps in connection with new debt issuances. During the debt issuance process, we are exposed to variability in future long-term debt interest payments that may result from changes in the benchmark interest rate (commonly the U.S. Treasury yield) prior to the debt being issued. In order to hedge this variability, we enter into interest rate swaps to effectively lock in the benchmark interest rate at the inception of the swap. Prior to 2017, we did not designate interest rate swaps as hedges and, therefore, included the associated settlement gains and losses as interest expense, net of interest income on the consolidated statements of operations.

In May 2017, we entered into an interest rate swap in connection with the issuance of ENLK’s 5.45% senior unsecured notes due 2047 (the “2047 Notes”). In accordance with ASC 815, we designated this swap as a cash flow hedge. Upon settlement of the interest rate swap in May 2017, we recorded the associated $2.2 million settlement loss in accumulated comprehensive loss on the consolidated balance sheets. We will amortize the settlement loss into interest expense on the consolidated statements of operations over the term of the 2047 Notes. There was no ineffectiveness related to the hedge. For the three and six months ended June 30, 2018, we amortized an immaterial amount of the settlement loss into interest expense from accumulated other comprehensive income (loss). We expect to recognize$0.1 millionof interest expense out of accumulated other comprehensive income (loss) over the next twelve months. We have no open interest rate swap position as of June 30, 2018.

Commodity Swaps

We manage our exposure to changes in commodity prices by hedging the impact of market fluctuations. Commodity swaps are used both to manage and hedge price and location risk related to these market exposures and to manage margins on offsetting fixed-price purchase or sale commitments for physical quantities of crude, condensate, natural gas, and NGLs. We do not designate commodity swaps as cash flow or fair value hedges for hedge accounting treatment under ASC 815. Therefore, changes in the fair value of our derivatives are recorded in revenue in the period incurred. In addition, our risk management policy does not allow us to take speculative positions with our derivative contracts.

We commonly enter into index (float-for-float) or fixed-for-float swaps in order to mitigate our cash flow exposure to fluctuations in the future prices of natural gas, NGLs, and crude oil. For natural gas, index swaps are used to protect against the price exposure of daily priced gas versus first-of-month priced gas. They are also used to hedge the basis location price risk resulting from supply and markets being priced on different indices. For natural gas, NGLs, condensate, and crude oil, fixed-for-float swaps are used to protect cash flows against price fluctuations: (1) where we receive a percentage of liquids as a fee for processing third-party gas or where we receive a portion of the proceeds of the sales of natural gas and liquids as a fee, (2) in the natural gas processing and fractionation components of our business and (3) where we are mitigating the price risk for product held in inventory or storage.

Assets and liabilities related to our derivative contracts are included in the fair value of derivative assets and liabilities, and the change in fair value of these contracts is recorded net as a gain (loss) on derivative activity on the consolidated statements of operations. We estimate the fair value of all of our derivative contracts based upon actively-quoted prices of the underlying commodities.

The components of gain (loss) on derivative activity in the consolidated statements of operations related to commodity swaps are (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Change in fair value of derivatives	$	(10.5	)	$	1.8		$	(14.0	)	$	7.1
Realized loss on derivatives	(4.7		)	(0.2		)	(0.7		)	(2.7		)
Gain (loss) on derivative activity	$	(15.2	)	$	1.6		$	(14.7	)	$	4.4

The fair value of derivative assets and liabilities related to commodity swaps are as follows (in millions):

	June 30, 2018			December 31, 2017
Fair value of derivative assets—current	$	4.0		$	6.8
Fair value of derivative liabilities—current	(10.7		)	(8.4		)
Fair value of derivative liabilities—long-term	(8.9		)	—
Net fair value of derivatives	$	(15.6	)	$	(1.6	)

As of June 30, 2018 and December 31, 2017, there were no derivative assets classified as long-term on the consolidated balance sheets.

Set forth below are the summarized notional volumes and fair values of all instruments held for price risk management purposes and related physical offsets atJune 30, 2018(in millions). The remaining term of the contracts extend no later than October 2019.

		June 30, 2018
Commodity	Instruments	Unit	Volume		Fair Value
NGL (short contracts)	Swaps	Gallons	(46.9	)	$	(7.3	)
NGL (long contracts)	Swaps	Gallons	17.9		0.5
Natural Gas (short contracts)	Swaps	MMBtu	(9.7	)	1.4
Natural Gas (long contracts)	Swaps	MMBtu	7.5		(2.4		)
Crude and condensate (short contracts)	Swaps	MMbbls	(8.8	)	(12.1		)
Crude and condensate (long contracts)	Swaps	MMbbls	1.1		4.3
Total fair value of derivatives					$	(15.6	)

On all transactions where we are exposed to counterparty risk, we analyze the counterparty’s financial condition prior to entering into an agreement, establish limits, and monitor the appropriateness of these limits on an ongoing basis. We primarily deal with financial institutions when entering into financial derivatives on commodities. We have entered into Master ISDAs that allow for netting of swap contract receivables and payables in the event of default by either party. If our counterparties failed to perform under existing swap contracts, the maximum loss on our gross receivable position of$8.3 million as of June 30, 2018 would be reduced toan immaterial amountdue to the offsetting of gross fair value payables against gross fair value receivables as allowed by the ISDAs.

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Fair Value Measurements

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

(12) Fair Value Measurements

ASC 820, Fair Value Measurements and Disclosures (“ASC 820”), sets forth a framework for measuring fair value and required disclosures about fair value measurements of assets and liabilities. Fair value under ASC 820 is defined as the price at which an asset could be exchanged in a current transaction between knowledgeable, willing parties. A liability’s fair value is defined as the amount that would be paid to transfer the liability to a new obligor, not the amount that would be paid to settle the liability with the creditor. Where available, fair value is based on observable market prices or parameters or derived from such prices or parameters. Where observable prices or inputs are not available, use of unobservable prices or inputs are used to estimate the current fair value, often using an internal valuation model. These valuation techniques involve some level of management estimation and judgment, the degree of which is dependent on the item being valued.

ASC 820 established a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

Our derivative contracts primarily consist of commodity swap contracts, which are not traded on a public exchange. The fair values of commodity swap contracts are determined using discounted cash flow techniques. The techniques incorporate Level 1 and Level 2 inputs for future commodity prices that are readily available in public markets or can be derived from information available in publicly-quoted markets. These market inputs are utilized in the discounted cash flow calculation considering the instrument’s term, notional amount, discount rate, and credit risk and are classified as Level 2 in hierarchy.

Net assets (liabilities) measured at fair value on a recurring basis are summarized below (in millions):

	Level 2
	June 30, 2018			December 31, 2017
Commodity Swaps (1)	$	(15.6	)	$	(1.6	)

(1) The fair values of derivative contracts included in assets or liabilities for risk management activities represent the amount at which the instruments could be exchanged in a current arms-length transaction adjusted for our credit risk and/or the counterparty credit risk as required under ASC 820.

Fair Value of Financial Instruments

The estimated fair value of our financial instruments has been determined using available market information and valuation methodologies.Considerable judgment is required to develop the estimates of fair value; thus, the estimates provided below are not necessarily indicative of the amount we could realize upon the sale or refinancing of such financial instruments (in millions):

	June 30, 2018				December 31, 2017
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including current maturities of long-term debt (1)	$	4,073.9	$	3,795.2	$	3,542.1	$	3,650.2
Installment Payables	$	—	$	—	$	249.5	$	249.6
Obligations under capital lease	$	3.3	$	2.8	$	4.1	$	3.4
Secured term loan receivable	$	48.5	$	48.5	$	—	$	—

(1) The carrying value of long-term debt, including current maturities of long-term debt, is reduced by debt issuance costs of$24.3 million and $26.2 million at June 30, 2018 and December 31, 2017, respectively. The respective fair values do not factor in debt issuance costs.

The carrying amounts of our cash and cash equivalents, accounts receivable, and accounts payable approximate fair value due to the short-term maturities of these assets and liabilities.

ENLK had $520.0 million of outstanding borrowings under the ENLK Credit Facility as of June 30, 2018 and no outstanding borrowings under the ENLK Credit Facility as of December 31, 2017. ENLC had $84.4 million and $74.6 million in outstanding borrowings under the ENLC Credit Facility as of June 30, 2018 and December 31, 2017, respectively. As borrowings under the ENLK Credit Facility and ENLC Credit Facility accrue interest under floating interest rate structures, the carrying value of such indebtedness approximates fair value for the amounts outstanding under the ENLK Credit Facility and the ENLC Credit Facility. As of June 30, 2018 and December 31, 2017, ENLK had total borrowings under senior unsecured notes of$3.5 billion maturing between 2019 and 2047 with fixed interest rates ranging from2.7% to 5.6%. The fair values of all senior unsecured notes and installment payables as ofJune 30, 2018 and December 31, 2017were based on Level 2 inputs from third-party market quotations. The fair values of obligations under capital leases and the secured term loan receivable were calculated using Level 2 inputs from third-party banks.

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Segment Information

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Segment Information

(13) Segment Information

Identification of the majority of our operating segments is based principally upon geographic regions served and the nature of operating activity. Our reportable segments consist of the following: natural gas gathering, processing, transmission, and fractionation operations located in North Texas and the Permian Basin primarily in West Texas (“Texas”), natural gas pipelines, processing plants, storage facilities, NGL pipelines, and fractionation assets in Louisiana (“Louisiana”), natural gas gathering and processing operations located throughout Oklahoma (“Oklahoma”), and crude rail, truck, pipeline, and barge facilities in West Texas, South Texas, Louisiana, Oklahoma, and the Ohio River Valley (“Crude and Condensate”). Operating activity for intersegment eliminations is shown in the Corporate segment. Our sales are derived from external domestic customers. We evaluate the performance of our operating segments based on segment profits.

Corporate assets consist primarily of cash, property, and equipment, including software, for general corporate support, debt financing costs, and unconsolidated affiliate investments in GCF and the Cedar Cove JV.

Based on the disclosure requirements of ASC 606, we are presenting revenues disaggregated based on the type of good or service in order to more fully depict the nature of our revenues. As we adopted ASC 606 using the modified retrospective method, only the consolidated statement of operations and revenue disaggregation information for thethree and six months ended June 30, 2018are presented to conform to ASC 606 accounting and disclosure requirements. Prior periods presented in the consolidated financial statements and accompanying notes were not restated in accordance with ASC 606.

Summarized financial information for our reportable segments is shown in the following tables (in millions):

	Texas			Louisiana			Oklahoma			Crude and Condensate			Corporate			Totals
Three Months Ended June 30, 2018
Natural gas sales	$	56.8		$	122.7		$	37.9		$	—		$	—		$	217.4
NGL sales	—			627.9			3.6			0.3			—			631.8
Crude oil and condensate sales	—			0.1			—			585.8			—			585.9
Product sales	56.8			750.7			41.5			586.1			—			1,435.1
Natural gas sales—related parties	—			—			1.9			—			—			1.9
NGL sales—related parties	134.3			28.9			140.4			—			(278.6		)	25.0
Crude oil and condensate sales—related parties	15.1			0.1			23.6			1.7			(40.2		)	0.3
Product sales—related parties	149.4			29.0			165.9			1.7			(318.8		)	27.2
Gathering and transportation	13.5			16.7			25.6			0.9			—			56.7
Processing	9.5			1.1			47.4			—			—			58.0
NGL services	—			10.3			—			—			—			10.3
Crude services	—			—			(0.1		)	15.1			—			15.0
Other services	2.2			0.2			—			—			—			2.4
Midstream services	25.2			28.3			72.9			16.0			—			142.4
Gathering and transportation—related parties	61.4			—			38.7			—			—			100.1
Processing—related parties	46.8			—			23.1			—			—			69.9
Crude services—related parties	—			—			0.7			4.3			—			5.0
Other services—related parties	0.2			—			—			—			—			0.2
Midstream services—related parties	108.4			—			62.5			4.3			—			175.2
Revenue from contracts with customers	339.8			808.0			342.8			608.1			(318.8		)	1,779.9
Cost of sales	(178.7		)	(723.0		)	(170.3		)	(572.4		)	318.8			(1,325.6		)
Operating expenses	(45.8		)	(28.0		)	(20.8		)	(18.8		)	—			(113.4		)
Loss on derivative activity	—			—			—			—			(15.2		)	(15.2		)
Segment profit (loss)	$	115.3		$	57.0		$	151.7		$	16.9		$	(15.2	)	$	325.7
Depreciation and amortization	$	(53.4	)	$	(30.5	)	$	(46.4	)	$	(12.7	)	$	(2.3	)	$	(145.3	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	44.7		$	16.6		$	121.0		$	34.9		$	1.0		$	218.2
Three Months Ended June 30, 2017
Product sales	$	74.6		$	548.7		$	27.7		$	276.2		$	—		$	927.2
Product sales—related parties	115.5			5.4			62.4			—			(154.0		)	29.3
Midstream services	28.2			56.3			33.0			14.4			—			131.9
Midstream services—related parties	107.2			35.3			59.4			5.3			(33.6		)	173.6
Cost of sales	(177.0		)	(575.7		)	(99.0		)	(268.3		)	187.6			(932.4		)
Operating expenses	(42.9		)	(24.6		)	(14.7		)	(20.4		)	—			(102.6		)
Gain on derivative activity	—			—			—			—			1.6			1.6
Segment profit	$	105.6		$	45.4		$	68.8		$	7.2		$	1.6		$	228.6
Depreciation and amortization	$	(59.6	)	$	(29.4	)	$	(38.6	)	$	(12.6	)	$	(2.3	)	$	(142.5	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	39.7		$	15.6		$	135.0		$	13.7		$	14.5		$	218.5

	Texas			Louisiana			Oklahoma			Crude and Condensate			Corporate			Totals
Six Months Ended June 30, 2018
Natural gas sales	$	139.8		$	247.7		$	86.0		$	—		$	—		$	473.5
NGL sales	—			1,236.3			5.5			0.8			—			1,242.6
Crude oil and condensate sales	—			0.1			—			1,218.1			—			1,218.2
Product sales	139.8			1,484.1			91.5			1,218.9			—			2,934.3
Natural gas sales—related parties	—			—			2.4			—			—			2.4
NGL sales—related parties	227.3			34.5			240.5			—			(474.9		)	27.4
Crude oil and condensate sales—related parties	26.0			0.2			45.9			1.8			(72.9		)	1.0
Product sales—related parties	253.3			34.7			288.8			1.8			(547.8		)	30.8
Gathering and transportation	26.7			34.3			41.2			1.7			—			103.9
Processing	13.3			1.7			56.4			—			—			71.4
NGL services	—			26.9			—			—			—			26.9
Crude services	—			—			—			27.9			—			27.9
Other services	4.0			0.4			—			0.1			—			4.5
Midstream services	44.0			63.3			97.6			29.7			—			234.6
Gathering and transportation—related parties	114.0			—			73.4			—			—			187.4
Processing—related parties	98.4			—			45.2			—			—			143.6
Crude services—related parties	—			—			1.4			8.6			—			10.0
Other services—related parties	0.4			—			—			—			—			0.4
Midstream services—related parties	212.8			—			120.0			8.6			—			341.4
Revenue from contracts with customers	649.9			1,582.1			597.9			1,259.0			(547.8		)	3,541.1
Cost of sales	(340.2		)	(1,409.7		)	(309.3		)	(1,195.7		)	547.8			(2,707.1		)
Operating expenses	(90.0		)	(53.6		)	(41.5		)	(37.5		)	—			(222.6		)
Loss on derivative activity	—			—			—			—			(14.7		)	(14.7		)
Segment profit (loss)	$	219.7		$	118.8		$	247.1		$	25.8		$	(14.7	)	$	596.7
Depreciation and amortization	$	(105.9	)	$	(59.7	)	$	(88.5	)	$	(25.1	)	$	(4.2	)	$	(283.4	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	110.0		$	23.4		$	219.5		$	44.2		$	2.3		$	399.4
Six Months Ended June 30, 2017
Product sales	$	159.7		$	1,093.2		$	42.2		$	622.1		$	—		$	1,917.2
Product sales—related parties	222.0			15.6			126.8			0.8			(293.2		)	72.0
Midstream services	56.0			109.4			60.9			33.0			—			259.3
Midstream services—related parties	212.3			64.3			108.8			8.6			(61.4		)	332.6
Cost of sales	(356.2		)	(1,140.4		)	(187.7		)	(605.0		)	354.6			(1,934.7		)
Operating expenses	(86.8		)	(50.0		)	(28.8		)	(41.1		)	—			(206.7		)
Gain on derivative activity	—			—			—			—			4.4			4.4
Segment profit	$	207.0		$	92.1		$	122.2		$	18.4		$	4.4		$	444.1
Depreciation and amortization	$	(109.4	)	$	(57.5	)	$	(75.1	)	$	(24.1	)	$	(4.7	)	$	(270.8	)
Impairments	$	—		$	—		$	—		$	(7.0	)	$	—		$	(7.0	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	68.0		$	48.3		$	275.7		$	51.1		$	23.5		$	466.6

The table below represents information about segment assets as ofJune 30, 2018 and December 31, 2017 (in millions):

Segment Identifiable Assets:	June 30, 2018		December 31, 2017
Texas	$	3,139.3	$	3,094.8
Louisiana	2,391.1		2,408.5
Oklahoma	2,993.8		2,836.7
Crude and Condensate	1,005.0		929.5
Corporate	1,254.4		1,268.3
Total identifiable assets	$	10,783.6	$	10,537.8

The following table reconciles the segment profits reported above to the operating income as reported on the consolidated statements of operations (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Segment profit	$	325.7		$	228.6		$	596.7		$	444.1
General and administrative expenses	(30.4		)	(31.1		)	(57.9		)	(67.2		)
Gain (loss) on disposition of assets	(1.2		)	5.4			(1.3		)	0.3
Depreciation and amortization	(145.3		)	(142.5		)	(283.4		)	(270.8		)
Impairments	—			—			—			(7.0		)
Gain on litigation settlement	—			8.5			—			26.0
Operating income	$	148.8		$	68.9		$	254.1		$	125.4

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Other Information

6 Months Ended

Jun. 30, 2018

Other Liabilities Disclosure [Abstract]

Other Information

(14) Other Information

The following tables present additional detail for other current assets and other current liabilities, which consists of the following (in millions):

Other Current Assets:	June 30, 2018		December 31, 2017
Natural gas and NGLs inventory	$	60.8	$	30.1
Secured term loan receivable from contract restructuring, net of discount of $1.6	17.9		—
Prepaid expenses and other	20.4		11.1
Natural gas and NGLs inventory, prepaid expenses, and other	$	99.1	$	41.2

Other Current Liabilities:	June 30, 2018		December 31, 2017
Accrued interest	$	36.6	$	35.6
Accrued wages and benefits, including taxes	18.0		30.4
Accrued ad valorem taxes	25.9		27.8
Capital expenditure accruals	41.8		48.8
Onerous performance obligations	17.9		15.2
Other	66.2		65.1
Other current liabilities	$	206.4	$	222.9

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Subsequent Event

6 Months Ended

Jun. 30, 2018

Subsequent Events [Abstract]

Subsequent Event

(15) Subsequent Event

On July 18, 2018, subsidiaries of Devon closed a transaction to sell all of their equity interests in ENLK, ENLC, and the managing member of ENLC to GIP. In connection with the closing of the transaction, GIP paid aggregate consideration of$3.125 billion in cash to Devon. As a result of the transaction:

• GIP, through GIP Stetson I, L.P., acquired all of the equity interests held by subsidiaries of Devon in ENLK and the managing member of ENLC, which amount to100%of the outstanding limited liability company interests in the managing member of ENLC and approximately23.1%of the outstanding limited partner interests in ENLK. Through this ownership, GIP acquired control of the managing member of ENLC and ENLC, and, as a result of ENLC’s indirect ownership of ENLK’s general partner, GIP has the ability to control ENLK; and

• GIP, through GIP Stetson II, L.P., acquired all of the equity interests held by subsidiaries of Devon in ENLC, which amount to approximately63.8%of the outstanding limited liability company interests in ENLC.

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Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying consolidated financial statements are prepared in accordance with the instructions to Form 10-Q, are unaudited, and do not include all the information and disclosures required by GAAP for complete financial statements. All adjustments that, in the opinion of management, are necessary for a fair presentation of the results of operations for the interim periods have been made and are of a recurring nature unless otherwise disclosed herein. The results of operations for such interim periods are not necessarily indicative of results of operations for a full year. All significant intercompany balances and transactions have been eliminated in consolidation.

Revenue Recognition

Revenue Recognition

We generate the majority of our revenues from midstream energy services, including gathering, transmission, processing, fractionation, storage, condensate stabilization, brine services, and marketing, through various contractual arrangements, which include fee-based contract arrangements or arrangements where we purchase and resell commodities in connection with providing the related service and earn a net margin for our fee. While our transactions vary in form, the essential element of most of our transactions is the use of our assets to transport a product or provide a processed product to an end-user or marketer at the tailgate of the plant, pipeline, or barge, truck, or rail terminal. Revenues from both “Product sales” and “Midstream services” represent revenues from contracts with customers and are reflected on the consolidated statements of operations as follows:

• Product sales—Product sales represent the sale of natural gas, NGLs, crude oil, and condensate where the product is purchased and resold in connection with providing our midstream services as outlined above.

• Midstream services—Midstream services represent all other revenue generated as a result of performing our midstream services as outlined above.

Adoption of ASC 606

Effective January 1, 2018, we adopted ASC 606 using the modified retrospective method. ASC 606 replaces previous revenue recognition requirements in GAAP and requires entities to recognize revenue at an amount that reflects the consideration to which they expect to be entitled in exchange for transferring goods or services to a customer. ASC 606 also requires significantly expanded disclosures containing qualitative and quantitative information regarding the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.

Evaluation of Our Contractual Performance Obligations

In adopting ASC 606, we evaluated our contracts with customers that are within the scope of ASC 606. In accordance with the new revenue recognition framework introduced by ASC 606, we identified our performance obligations under our contracts with customers. These performance obligations include:

• promises to perform midstream services for our customers over a specified contractual term and/or for a specified volume of commodities; and

• promises to sell a specified volume of commodities to our customers.

The identification of performance obligations under our contracts requires a contract-by-contract evaluation of when control, including the economic benefit, of commodities transfers to and from us (if at all). This evaluation of control changed the way we account for certain transactions effective January 1, 2018, specifically those contracts in which there is both a commodity purchase and a midstream service. For contracts where control of commodities transfers to us before we perform our services, we generally have no performance obligation for our services, and accordingly, we do not consider these revenue-generating contracts for purposes of ASC 606. Based on the control determination, all contractually-stated fees that are deducted from our payments to producers or other suppliers for commodities purchased are reflected as a reduction in the cost of such commodity purchases. Alternatively, for contracts where control of commodities transfers to us after we perform our services, we consider these contracts to contain performance obligations for our services. Accordingly, we consider the satisfaction of these performance obligations as revenue-generating and recognize the fees received for satisfying them as midstream service revenues over time as we satisfy our performance obligations. For contracts where control of commodities never transfers to us and we simply earn a fee for our services, we recognize these fees as midstream services revenues over time as we satisfy our performance obligations.

We also evaluate our contractual arrangements that contain a purchase and sale of commodities under the principal/agent provisions in ASC 606. For contracts where we possess control of the commodity and act as principal in the purchase and sale, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities when purchased. For contracts in which we do not possess control of the commodity and are acting as an agent, our consolidated statements of operations only reflect midstream services revenues that we earn based on the fees contained in the applicable contract.

Based on our review of our performance obligations in our contracts with customers, we changed the consolidated statement of operations classification for certain transactions from revenue to cost of sales or from cost of sales to revenue. For thethree and six months ended June 30, 2018, the reclassification of revenues and cost of sales resulted in a net decrease in revenue of approximately$163 million and $301 million, respectively, or 9% and 8%, respectively, compared to total revenues based on accounting prior to the adoption of ASC 606, with an equivalent net decrease in cost of sales. The change in total revenues as a result of the adoption of ASC 606 is made up of the following revenue line item changes (in millions):

	Increase (Decrease) in Revenue Due to ASC 606 Adoption
	Three Months Ended June 30, 2018			Six Months Ended June 30, 2018
Product sales	$	(46	)	$	(78	)
Product sales—related parties	(24		)	(46		)
Midstream services	(76		)	(153		)
Midstream services—related parties	(17		)	(24		)
Total	$	(163	)	$	(301	)

This change in accounting treatment had no impact on our operating income, net income, results of operations, financial condition, or cash flows.

Changes in Accounting Methodology for Certain Contracts

For NGL contracts in which we purchase raw mix NGLs and subsequently transport, fractionate, and market the NGLs, we accounted for these contracts prior to the adoption of ASC 606 as revenue-generating contracts in which the fees we earned for our services were recorded as midstream services revenue on the consolidated statements of operations. As a result of the adoption of ASC 606, we determined that the control, including the economic benefit, of commodities has passed to us once the raw mix NGLs have been purchased from the customer. Therefore, we now consider the contractually-stated fees to serve as pricing mechanisms that reduce the cost of such commodity purchased upon receipt of the raw mix NGLs, rather than being recorded as midstream services revenue. Upon sale of the NGLs to a third-party customer, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities purchased.

For our crude oil and condensate service contracts in which we purchase the commodity, we utilize a similar approach under ASC 606 as outlined above for NGL contracts. This treatment is consistent with our accounting for crude oil and condensate service contracts prior to the adoption of ASC 606.

For our natural gas gathering and processing contracts in which we perform midstream services and also purchase the natural gas, we accounted for these contracts prior to the adoption of ASC 606 as revenue-generating contracts in which all contractually-stated fees earned for our gathering and processing services were recorded as midstream services revenue on the statements of operations. As a result of the adoption of ASC 606, we must determine if economic control of the commodities has passed from the producer to us before or after we perform our services (if at all). Control is assessed on a contract-by-contract basis by analyzing each contract’s provisions, which can include provisions for: the customer to take its residue gas and/or NGLs in-kind; fixed or actual NGL or keep-whole recovery; commodity purchase prices at weighted average sales price or market index-based pricing; and various other contract-specific considerations. Based on this control assessment, our gathering and processing contracts fall into two primary categories:

• For gathering and processing contracts in which there is a commodity purchase and analysis of the contract provisions indicates that control, including the economic benefit, of the natural gas passes to us when the natural gas is brought into our system, we do not consider these contracts to contain performance obligations for our services. As control of the natural gas passes to us prior to performing our gathering and processing services, we are, in effect, performing our services for our own benefit. Based on this control determination, we consider the contractually-stated fees to serve as pricing mechanisms that reduce the cost of such commodity purchased upon receipt of the natural gas, rather than being recorded as midstream services revenue. Upon sale of the residue gas and/or NGLs to a third-party customer, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities purchased.

• For gathering and processing contracts in which there is a commodity purchase and analysis of the contract provisions indicates that control, including the economic benefit, of the natural gas does not pass to us until after the natural gas has been gathered and processed, we consider these contracts to contain performance obligations for our services. Accordingly, we consider the satisfaction of these performance obligations as revenue-generating, and we recognize the fees received for satisfying these performance obligations as midstream service revenues over time as we satisfy our performance obligations.

For midstream service contracts related to NGL, crude oil, or natural gas gathering and processing in which there is no commodity purchase or control of the commodity never passes to us and we simply earn a fee for our services, we consider these contracts to contain performance obligations for our services. Accordingly, we consider the satisfaction of these performance obligations as revenue-generating, and we recognize the fees received for satisfying these performance obligations as midstream service revenues over time as we satisfy our performance obligations. This treatment is consistent with our accounting for these contracts prior to the adoption of ASC 606.

For our natural gas transmission contracts, we determined that control of the natural gas never transfers to us and we simply earn a fee for our services. Therefore, we recognize these fees as midstream services revenues over time as we satisfy our performance obligations. This treatment is consistent with our accounting for natural gas transmission contracts prior to the adoption of ASC 606.

We also evaluate our commodity marketing contracts, under which we purchase and sell commodities in connection with our gas, NGL, crude, and condensate midstream services, pursuant to ASC 606, including the principal/agent provisions. For contracts in which we possess control of the commodity and act as principal in the purchase and sale of commodities, we record product sales revenue at the price at which the commodities are sold, with a corresponding cost of sales equal to the cost of the commodities when purchased. For contracts in which we do not possess control of the commodity and are acting as agent, our consolidated statements of operations only reflect midstream services revenues that we earn based on the fees contained in the applicable contract. This treatment is consistent with our accounting for our commodity marketing contracts prior to the adoption of ASC 606.

Satisfaction of Performance Obligations and Recognition of Revenue

While ASC 606 alters the line item on which certain amounts are recorded on the consolidated statements of operations, ASC 606 did not significantly affect the timing of income and expense recognition on the consolidated statements of operations. Specifically, for our commodity sales contracts, we satisfy our performance obligations at the point in time at which the commodity transfers from us to the customer. This transfer pattern aligns with our billing methodology. Therefore, we recognize product sales revenue at the time the commodity is delivered and in the amount to which we have the right to invoice the customer, which is consistent with our accounting prior to the adoption of ASC 606. For our midstream service contracts that contain revenue-generating performance obligations, we satisfy our performance obligations over time as we perform the midstream service and as the customer receives the benefit of these services over the term of the contract. As permitted by ASC 606, we are utilizing the practical expedient that allows an entity to recognize revenue in the amount to which the entity has a right to invoice, since we have a right to consideration from our customer in an amount that corresponds directly with the value to the customer of our performance completed to date. Accordingly, we continue to recognize revenue over time as our midstream services are performed. Therefore, ASC 606 does not significantly affect the timing of revenue and expense recognition on our consolidated statements of operations, and no cumulative effect adjustment was made to the balance of equity upon our adoption of ASC 606.

We generally accrue one month of sales and the related natural gas, NGL, condensate, and crude oil purchases and reverse these accruals when the sales and purchases are invoiced and recorded in the subsequent month. Actual results could differ from the accrual estimates. We typically receive payment for invoiced amounts within one month, depending on the terms of the contract. We account for taxes collected from customers attributable to revenue transactions and remitted to government authorities on a net basis (excluded from revenues).

Minimum Volume Commitments and Firm Transportation Contracts

Certain gathering and processing agreements in our Texas, Oklahoma, and Crude and Condensate segments provide for quarterly or annual MVCs, including MVCs from Devon from certain of our Barnett Shale assets in North Texas and our Cana gathering and processing assets in Oklahoma. Under these agreements, our customers or suppliers (as “customers” and “suppliers” are determined per application of ASC 606) agree to ship and/or process a minimum volume of product on our systems over an agreed time period. If a customer or supplier under such an agreement fails to meet its MVC for a specified period, the customer is obligated to pay a contractually-determined fee based upon the shortfall between actual product volumes and the MVC for that period. Some of these agreements also contain make-up right provisions that allow a customer or supplier to utilize gathering or processing fees in excess of the MVC in subsequent periods to offset shortfall amounts in previous periods. We record revenue under MVC contracts during periods of shortfall when it is known that the customer cannot, or will not, make up the deficiency in subsequent periods. Deficiency fee revenue is included in midstream services revenues.

For our firm transportation contracts, we transport commodities owned by others for a stated monthly fee for a specified monthly quantity with an additional fee based on actual volumes. We include transportation fees from firm transportation contracts in our midstream services revenues.

The following table summarizes the expected impact to our consolidated statements of operations, resulting from either revenue or reductions to cost of sales, from MVC and firm transportation contractual provisions. All amounts in the table below reflect the contractually-stated MVC or firm transportation volumes specified for each period multiplied by the relevant deficiency or reservation fee. Actual amounts could differ due to the timing of revenue recognition or reductions to cost of sales resulting from make-up right provisions included in our agreements, as well as due to nonpayment or nonperformance by our customers. In addition, amounts in the table below do not represent the shortfall amounts we expect to collect under our MVC contracts as we generally do not expect volume shortfalls to equal the full amount of the contractual MVCs during these periods.

2018 (remaining)	$	388.4
2019	235.8
2020	224.8
2021	82.2
2022	71.9
Thereafter	231.2
Total	$	1,234.3

In May 2018, we restructured one of our natural gas gathering and processing contracts that included MVCs that were in effect through 2023. Prior to the contract restructuring, we expected$135.1 million in guaranteed future gross operating margin under the contract, generated from either revenue or reductions to cost of sales resulting from both gathering and processing fees as well as shortfall revenue under the MVCs. As a result of the contract restructuring, all MVC provisions were removed from the contract, and we and the counterparty entered into additional agreements pursuant to which: (i) the counterparty made a$19.7 million payment to us on the date of the contract restructuring to satisfy MVC revenue earned up to the date of the contract restructuring; (ii) the counterparty entered into a second lien secured term loan under which the counterparty will pay us$58.0 millionin principal payments in various installments ending in May 2023, with interest accruing on the loan balance at8.0%per annum beginning in 2020; and (iii) the counterparty granted to us a1.0%term overriding royalty interest through June 2034 in each well located on leasehold interests of the counterparty and connected to the gas gathering system that we operate. As a result of the contract restructuring and in accordance with ASC 606, we recognized$45.5 millionof midstream services revenue, which primarily represents the discounted present value of the second lien secured term loan receivable, in the Oklahoma segment in the second quarter of 2018. Pursuant to the contract restructuring, the terms of the restructured contract, other than the MVCs, are the same as the original contract, and we expect to continue recognizing gathering and processing fees on volumes delivered by the customer.

Contributions in Aid of Construction

The adoption of ASC 606 also alters how we account for contributions in aid of construction (“CIAC”). CIAC payments are lump sum payments from third parties to reimburse us for capital expenditures related to the construction of our operating assets and, in most cases, the connection of these operating assets to the third party’s assets. CIAC payments can be paid to us prior to the commencement of construction activities, during construction, or after construction has been completed. Prior to adoption of ASC 606 and in accordance with ASC 980, Regulated Operations (“ASC 980”), and the FERC Uniform System of Accounts, we reduced the balance of the related property and equipment by the amount of CIAC payments received. In doing so, CIAC payments previously affected the consolidated statements of operations through reduced depreciation expense over the useful lives of the related property and equipment. Upon adoption of ASC 606, we initially recognize CIAC payments received from customers as deferred revenue, which will be subsequently amortized into revenue over the term of the underlying operational contract. For CIAC payments from noncustomers and for payments related to the construction of regulated operating assets, we continue to reduce the balance of the related property and equipment in accordance with ASC 980 and the FERC Uniform System of Accounts. This change in our CIAC accounting policy was not material to our financial statements for thethree and six months ended June 30, 2018.

Disaggregation of Revenue and Presentation of Prior Periods

Based on the disclosure requirements of ASC 606, we are presenting revenues disaggregated based on the type of good or service in order to more fully depict the nature of our revenues. SeeNote 13—Segment Informationfor the revenue disaggregation information included in the segment information table for thethree and six months ended June 30, 2018. As we adopted ASC 606 using the modified retrospective method, only the consolidated statement of operations and revenue disaggregation information for thethree and six months ended June 30, 2018are presented to conform to ASC 606 accounting and disclosure requirements. Prior periods presented in the consolidated financial statements and accompanying notes were not restated in accordance with ASC 606.

Accounting Standards to be Adopted in Future Periods

Accounting Standards to be Adopted in Future Periods

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842)—Amendments to the FASB Accounting Standards Codification (“ASU 2016-02”), which establishes ASC Topic 842, Leases (“ASC 842”). Under ASC 842, lessees will need to recognize virtually all of their leases on the balance sheet by recording a right-of-use asset and lease liability. Lessor accounting is similar to the current model, but updated to align with certain changes to the lessee model and the new revenue recognition standard. Existing sale-leaseback guidance is replaced with a new model applicable to both lessees and lessors. Additional revisions have been made to embedded leases, reassessment requirements, and lease term assessments including variable lease payment, discount rate, and lease incentives. ASC 842 is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those annual periods. Entities are required to adopt ASC 842 using a modified retrospective transition. We will adopt ASC 842 effective January 1, 2019. We are currently assessing the impact of adopting ASC 842 and are in the process of implementing a lease accounting software tool. This assessment includes the evaluation of our current lease contracts and the analysis of contracts that may contain lease components. While we cannot currently estimate the quantitative effect that ASC 842 will have on our consolidated financial statements, the adoption of ASC 842 will increase our asset and liability balances on the consolidated balance sheets due to the required recognition of right-of-use assets and corresponding lease liabilities for all lease obligations that are currently classified as operating leases. In addition, there are industry-specific concerns with the implementation of ASC 842 that will require further evaluation before we are able to fully assess the impact of ASC 842 on our consolidated financial statements.

In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842)—Land Easement Practical Expedient for Transition to Topic 842 (“ASU 2018-01”). ASU 2018-01 amends ASC 842 and provides an optional practical expedient to not evaluate under ASC 842 existing or expired land easements that were not previously accounted for as leases under the current leases guidance in ASC 840, Leases. Under ASU 2018-01, an entity that elects this practical expedient should evaluate new or modified land easements under ASC 842 beginning at the date that the entity adopts ASC 842. We plan to utilize the practical expedient provided in ASU 2018-01 in conjunction with our adoption of ASC 842.

Property and Equipment

Property & Equipment

Impairment Review. In accordance with ASC 360, Property, Plant and Equipment, we evaluate long-lived assets of identifiable business activities for potential impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be recoverable. The carrying amount of a long-lived asset is not recoverable when it exceeds the undiscounted sum of the future cash flows expected to result from the use and eventual disposition of the asset. Estimates of expected future cash flows represent management’s best estimate based on reasonable and supportable assumptions. When the carrying amount of a long-lived asset is not recoverable, an impairment loss is recognized equal to the excess of the asset’s carrying value over its fair value.

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Significant Accounting Polices (Tables)

6 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

Based on our review of our performance obligations in our contracts with customers, we changed the consolidated statement of operations classification for certain transactions from revenue to cost of sales or from cost of sales to revenue. For thethree and six months ended June 30, 2018, the reclassification of revenues and cost of sales resulted in a net decrease in revenue of approximately$163 million and $301 million, respectively, or 9% and 8%, respectively, compared to total revenues based on accounting prior to the adoption of ASC 606, with an equivalent net decrease in cost of sales. The change in total revenues as a result of the adoption of ASC 606 is made up of the following revenue line item changes (in millions):

	Increase (Decrease) in Revenue Due to ASC 606 Adoption
	Three Months Ended June 30, 2018			Six Months Ended June 30, 2018
Product sales	$	(46	)	$	(78	)
Product sales—related parties	(24		)	(46		)
Midstream services	(76		)	(153		)
Midstream services—related parties	(17		)	(24		)
Total	$	(163	)	$	(301	)

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

The following table summarizes the expected impact to our consolidated statements of operations, resulting from either revenue or reductions to cost of sales, from MVC and firm transportation contractual provisions. All amounts in the table below reflect the contractually-stated MVC or firm transportation volumes specified for each period multiplied by the relevant deficiency or reservation fee. Actual amounts could differ due to the timing of revenue recognition or reductions to cost of sales resulting from make-up right provisions included in our agreements, as well as due to nonpayment or nonperformance by our customers. In addition, amounts in the table below do not represent the shortfall amounts we expect to collect under our MVC contracts as we generally do not expect volume shortfalls to equal the full amount of the contractual MVCs during these periods.

2018 (remaining)	$	388.4
2019	235.8
2020	224.8
2021	82.2
2022	71.9
Thereafter	231.2
Total	$	1,234.3

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Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Changes in Carrying Value

The following table represents our change in carrying value of intangible assets (in millions):

	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Six Months Ended June 30, 2018
Customer relationships, beginning of period	$	1,795.8	$	(298.7	)	$	1,497.1
Amortization expense	—		(61.7		)	(61.7		)
Customer relationships, end of period	$	1,795.8	$	(360.4	)	$	1,435.4

Schedule of Amortization Expense

The following table summarizes our estimated aggregate amortization expense for the next five years and thereafter (in millions):

2018 (remaining)	$	61.8
2019	123.4
2020	123.4
2021	123.4
2022	123.4
Thereafter	880.0
Total	$	1,435.4

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Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Summary of Debt

As of June 30, 2018 and December 31, 2017, long-term debt consisted of the following (in millions):

	June 30, 2018								December 31, 2017
	Outstanding Principal		Premium (Discount)			Long-Term Debt			Outstanding Principal		Premium (Discount)			Long-Term Debt
ENLK credit facility due 2020 (1)	$	520.0	$	—		$	520.0		$	—	$	—		$	—
ENLC credit facility due 2019 (2)	84.4		—			84.4			74.6		—			74.6
ENLK’s 2.70% Senior unsecured notes due 2019	400.0		(0.1		)	399.9			400.0		(0.1		)	399.9
ENLK’s 4.40% Senior unsecured notes due 2024	550.0		2.0			552.0			550.0		2.2			552.2
ENLK’s 4.15% Senior unsecured notes due 2025	750.0		(0.9		)	749.1			750.0		(1.0		)	749.0
ENLK’s 4.85% Senior unsecured notes due 2026	500.0		(0.6		)	499.4			500.0		(0.6		)	499.4
ENLK’s 5.60% Senior unsecured notes due 2044	350.0		(0.2		)	349.8			350.0		(0.2		)	349.8
ENLK’s 5.05% Senior unsecured notes due 2045	450.0		(6.3		)	443.7			450.0		(6.5		)	443.5
ENLK's 5.45% Senior unsecured notes due 2047	500.0		(0.1		)	499.9			500.0		(0.1		)	499.9
Debt classified as long-term, including current maturities of long-term debt	$	4,104.4	$	(6.2	)	$	4,098.2		$	3,574.6	$	(6.3	)	$	3,568.3
Debt issuance cost (3)						(24.3		)						(26.2		)
Less: Current maturities of long-term debt (4)						(483.7		)						—
Long-term debt, net of unamortized issuance cost						$	3,590.2							$	3,542.1

(1) Bears interest based on Prime and/or LIBOR plus an applicable margin. The effective interest rate was3.6%atJune 30, 2018.

(2) Bears interest based on Prime and/or LIBOR plus an applicable margin. The effective interest rate was 3.9% and 3.2% at June 30, 2018 and December 31, 2017, respectively.

(3) Net of amortization of $14.8 million and $12.9 million at June 30, 2018 and December 31, 2017, respectively.

(4) The outstanding balance, net of debt issuance costs, of the ENLC Credit Facility and ENLK’s2.70%senior unsecured notes as ofJune 30, 2018are classified as “Current maturities of long-term debt” on the consolidated balance sheet as the ENLC Credit Facility matures on March 7, 2019, and ENLK’s 2.70% senior unsecured notes mature on April 1, 2019.

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Income Taxes (Tables)

6 Months Ended

Jun. 30, 2018

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

Income taxes included on the consolidated financial statements were as follows for the periods presented (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018		2017
Current income tax provision (benefit)	$	(0.3	)	$	(1.0	)	$	0.9	$	(0.2	)
Deferred income tax provision	6.6			4.2			$	12.4	$	6.4
Total income tax provision	$	6.3		$	3.2		$	13.3	$	6.2

Reconciliation of Total Income Tax Expense to Income before Income Taxes

The following schedule reconciles total income tax expense and the amount calculated by applying the statutory U.S. federal tax rate to income before income taxes (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Expected income tax provision based on federal statutory rate (1)	$	7.2		$	3.1		$	11.3		$	3.5
State income taxes expense, net of federal tax benefit	0.8			0.3			1.3			0.3
Income tax expense (benefit) from ENLK	(2.0		)	(0.3		)	(1.0		)	0.2
Unit-based compensation	(0.1		)	—			1.5			2.3
Other	0.4			0.1			0.2			(0.1		)
Total income tax provision	$	6.3		$	3.2		$	13.3		$	6.2

(1) The statutory federal tax rate for corporations was 21% at June 30, 2018 and 35% at June 30, 2017.

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Certain Provisions of the Partnership Agreement (Tables)

6 Months Ended

Jun. 30, 2018

Partners' Capital [Abstract]

Summary of Distribution Activity

A summary of the distribution activity relating to the Series B Preferred Units during the six months ended June 30, 2018 and 2017 is provided below:

Declaration period	Distribution paid as additional Series B Preferred Units	Cash Distribution (in millions)		Date paid/payable
2018
Fourth Quarter of 2017	413,658	$	16.0	February 13, 2018
First Quarter of 2018	416,657	$	16.2	May 14, 2018
Second Quarter of 2018	419,678	$	16.3	August 13, 2018
2017
Fourth Quarter of 2016	1,130,131	$	—	February 13, 2017
First Quarter of 2017	1,154,147	$	—	May 12, 2017
Second Quarter of 2017	1,178,672	$	—	August 11, 2017

A summary of ENLK’s distribution activity relating to the common units during thesixmonths endedJune 30, 2018 and 2017 is provided below:

Declaration period	Distribution/unit		Date paid/payable
2018
Fourth Quarter of 2017	$	0.39	February 13, 2018
First Quarter of 2018	$	0.39	May 14, 2018
Second Quarter of 2018	$	0.39	August 13, 2018
2017
Fourth Quarter of 2016	$	0.39	February 13, 2017
First Quarter of 2017	$	0.39	May 12, 2017
Second Quarter of 2017	$	0.39	August 11, 2017

Incentive Distributions

Net income is allocated to the General Partner in an amount equal to its incentive distribution rights as described in section “(d) ENLK Common Unit Distributions” above. The General Partner’s share of net income consists of incentive distribution rights to the extent earned, a deduction for unit-based compensation attributable to ENLC’s restricted units, and the percentage interest of ENLK’s net income adjusted for ENLC’s unit-based compensation specifically allocated to the General Partner. The net income allocated to the General Partner is as follows (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Income allocation for incentive distributions	$	14.8		$	14.6		$	29.6		$	29.3
Unit-based compensation attributable to ENLC’s restricted units	(4.0		)	(3.9		)	(8.4		)	(12.7		)
General Partner share of net income	0.4			0.1			0.6			0.1
General Partner interest in net income	$	11.2		$	10.8		$	21.8		$	16.7

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Members' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings per Limited Partner Unit

The following table reflects the computation of basic and diluted earnings per unit for the periods presented (in millions, except per unit amounts):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
ENLC interest in net income	$	28.0		$	5.9		$	40.4		$	4.0
Distributed earnings allocated to:
Common units (1) (2)	$	48.3		$	46.1		$	95.9		$	92.0
Unvested restricted units (1) (2)	0.8			0.6			1.3			1.2
Total distributed earnings	$	49.1		$	46.7		$	97.2		$	93.2
Undistributed loss allocated to:
Common units	$	(20.8	)	$	(40.3	)	$	(56.1	)	$	(88.1	)
Unvested restricted units	(0.3		)	(0.5		)	(0.7		)	(1.1		)
Total undistributed loss	$	(21.1	)	$	(40.8	)	$	(56.8	)	$	(89.2	)
Net income allocated to:
Common units	$	27.5		$	5.8		$	39.8		$	3.9
Unvested restricted units	0.5			0.1			0.6			0.1
Total net income	$	28.0		$	5.9		$	40.4		$	4.0
Basic and diluted net income per unit:
Basic	$	0.15		$	0.03		$	0.22		$	0.02
Diluted	$	0.15		$	0.03		$	0.22		$	0.02

(1) For the three months ended June 30, 2018 and 2017, distributed earnings represent a declared distribution of $0.267 per unit payable on August 14, 2018 and a distribution of $0.255 per unit paid on August 14, 2017, respectively.

(2) For the six months ended June 30, 2018, distributed earnings included a distribution of $0.263 per unit paid on May 15, 2018 and a declared distribution of $0.267 per unit payable on August 14, 2018. For the six months ended June 30, 2017, distributed earnings included distributions of $0.255 per unit paid on May 15, 2017 and $0.255 per unit paid on August 14, 2017.

Schedule of Unit Amounts Used to Computer Earnings per Unit

The following are the unit amounts used to compute the basic and diluted earnings per unit for the periods presented (in millions):

	Three Months Ended June 30,		Six Months Ended June 30,
	2018	2017	2018	2017
Basic weighted average units outstanding:
Weighted average common units outstanding	181.0	180.6	181.0	180.4
Diluted weighted average units outstanding:
Weighted average basic common units outstanding	181.0	180.6	181.0	180.4
Dilutive effect of non-vested restricted units	1.2	1.1	1.0	1.2
Total weighted average diluted common units outstanding	182.2	181.7	182.0	181.6

Summary of Distribution Activity

A summary of our distribution activity relating to the ENLC common units for the six months ended June 30, 2018 and 2017, respectively, is provided below:

Declaration period	Distribution/unit		Date paid/payable
2018
Fourth Quarter of 2017	$	0.259	February 14, 2018
First Quarter of 2018	$	0.263	May 15, 2018
Second Quarter 2018	$	0.267	August 14, 2018
2017
Fourth Quarter of 2016	$	0.255	February 14, 2017
First Quarter of 2017	$	0.255	May 15, 2017
Second Quarter 2017	$	0.255	August 14, 2017

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Investment in Unconsolidated Affiliates (Tables)

6 Months Ended

Jun. 30, 2018

Equity Method Investments and Joint Ventures [Abstract]

Activity Related to Investment in Unconsolidated Affiliates

The following table shows the activity related to our investment in unconsolidated affiliates for the periods indicated (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
GCF
Distributions	$	5.4		$	4.4		$	11.1		$	7.1
Equity in income	$	4.8		$	—		$	9.4		$	4.0
HEP
Equity in loss (1)	$	—		$	—		$	—		$	(3.4	)
Cedar Cove JV
Contributions	$	0.1		$	4.3		$	0.1		$	10.3
Distributions	$	—		$	0.1		$	0.3		$	0.3
Equity in loss	$	(0.4	)	$	(0.1	)	$	(2.0	)	$	—
Total
Contributions	$	0.1		$	4.3		$	0.1		$	10.3
Distributions	$	5.4		$	4.5		$	11.4		$	7.4
Equity in income (loss) (1)	$	4.4		$	(0.1	)	$	7.4		$	0.6

(1) We sold our ownership interest in HEP during the first quarter of 2017, resulting in a loss of$3.4 million for the sixmonths ended June 30, 2017.

The following table shows the balances related to our investment in unconsolidated affiliates as ofJune 30, 2018 and December 31, 2017 (in millions):

	June 30, 2018		December 31, 2017
GCF	$	46.7	$	48.4
Cedar Cove JV	38.8		41.0
Total investment in unconsolidated affiliates	$	85.5	$	89.4

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Employee Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Amounts Recognized in Consolidated Financial Statements

Amounts recognized on the consolidated financial statements with respect to these plans are as follows (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Cost of unit-based compensation charged to operating expense	$	2.3	$	2.6	$	4.3	$	7.6
Cost of unit-based compensation charged to general and administrative expense	7.3		6.7		10.4		21.1
Total unit-based compensation expense	$	9.6	$	9.3	$	14.7	$	28.7
Non-controlling interest in unit-based compensation	$	3.6	$	3.5	$	5.5	$	10.8
Amount of related income tax benefit recognized in net income (1)	$	1.2	$	2.1	$	1.9	$	6.7

(1) For the three and six months ended June 30, 2018, the amount of related income tax benefit recognized in net income excluded $0.1 million of income tax benefit and $1.5 million of income tax expense, respectively, related to tax deficiencies recorded upon vesting of restricted units. For the six months ended June 30, 2017, the amount of related income tax benefit recognized in net income excluded $2.3 million of income tax expense related to tax deficiencies recorded upon vesting of restricted units. There was no income tax expense or benefit related to tax deficiencies recorded upon vesting of restricted units for the three months ended June 30, 2017.

Summary of Restricted Incentive Unit Activity

A summary of the restricted incentive unit activity for thesix months ended June 30, 2018is provided below:

	Six Months Ended June 30, 2018
EnLink Midstream Partners, LP Restricted Incentive Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	1,980,224			$	15.81
Granted (1)	1,166,464			15.15
Vested (1)(2)	(601,581		)	22.04
Forfeited	(148,572		)	12.29
Non-vested, end of period	2,396,535			$	14.14
Aggregate intrinsic value, end of period (in millions)	$	37.2

(1) Restricted incentive units typically vest at the end of three years. In March 2018, ENLK granted 200,753restricted incentive units with a fair value of$3.0 millionto officers and certain employees as bonus payments for 2017, and these restricted incentive units vested immediately and are included in the restricted incentive units granted and vested line items.

(2) Vested units included189,584units withheld for payroll taxes paid on behalf of employees.

A summary of the restricted incentive unit activity for thesixmonths endedJune 30, 2018is provided below:

	Six Months Ended June 30, 2018
EnLink Midstream, LLC Restricted Incentive Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	1,889,310			$	16.33
Granted (1)	1,059,062			15.67
Vested (1)(2)	(556,262		)	24.24
Forfeited	(138,187		)	12.24
Non-vested, end of period	2,253,923			$	14.32
Aggregate intrinsic value, end of period (in millions)	$	37.1

(1) Restricted incentive units typically vest at the end of three years. In March 2018, ENLC granted194,185restricted incentive units with a fair value of$3.0 million to officers and certain employees as bonus payments for 2017, and these restricted incentive units vested immediately and are included in the restricted incentive units granted and vested line items.

(2) Vested units included178,824units withheld for payroll taxes paid on behalf of employees.

Summary of Restricted Units' Aggregate Intrinsic Value

A summary of the restricted incentive units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thethree and six months ended June 30, 2018 and 2017is provided below (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
EnLink Midstream, LLC Restricted Incentive Units:	2018		2017		2018		2017
Aggregate intrinsic value of units vested	$	0.4	$	0.3	$	9.3	$	14.6
Fair value of units vested	$	0.4	$	0.4	$	13.5	$	20.8

A summary of the restricted incentive units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thethree and six months ended June 30, 2018 and 2017 is provided below (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
EnLink Midstream Partners, LP Restricted Incentive Units:	2018		2017		2018		2017
Aggregate intrinsic value of units vested	$	0.4	$	0.4	$	9.1	$	15.7
Fair value of units vested	$	0.5	$	0.5	$	13.3	$	21.0

Summary of Grant-Date Fair Values

The following table presents a summary of the grant-date fair value assumptions by performance unit grant date:

EnLink Midstream, LLC Performance Units:	March 2018
Beginning TSR price	$	16.55
Risk-free interest rate	2.38		%
Volatility factor	51.36		%
Distribution yield	6.7		%

The following table presents a summary of the grant-date fair value of performance units granted and the related assumptions by performance unit grant date:

EnLink Midstream Partners, LP Performance Units:	March 2018
Beginning TSR price	$	15.44
Risk-free interest rate	2.38		%
Volatility factor	43.85		%
Distribution yield	10.5		%

Summary of Performance Units

The following table presents a summary of the performance units:

	Six Months Ended June 30, 2018
EnLink Midstream Partners, LP Performance Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	585,285			$	20.52
Granted	256,345			19.24
Vested (1)	(115,328		)	35.39
Forfeited	(76,351		)	16.62
Non-vested, end of period	649,951			$	17.83
Aggregate intrinsic value, end of period (in millions)	$	10.1

(1) Vested units included34,069units withheld for payroll taxes paid on behalf of employees.

A summary of the performance units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thesixmonths endedJune 30, 2018is provided below (in millions). No performance units vested for the three months ended June 30, 2018 or for the three and six months ended June 30, 2017.

EnLink Midstream Partners, LP Performance Units:	Six Months Ended June 30, 2018
Aggregate intrinsic value of units vested	$	2.0
Fair value of units vested	$	4.1

The following table presents a summary of the performance units:

	Six Months Ended June 30, 2018
EnLink Midstream, LLC Performance Units:	Number of Units			Weighted Average Grant-Date Fair Value
Non-vested, beginning of period	548,839			$	22.14
Granted	223,865			21.63
Vested (1)	(102,555		)	40.48
Forfeited	(70,918		)	17.75
Non-vested, end of period	599,231			$	19.33
Aggregate intrinsic value, end of period (in millions)	$	9.9

(1) Vested units included28,846units withheld for payroll taxes paid on behalf of employees.

A summary of the performance units’ aggregate intrinsic value (market value at vesting date) and fair value of units vested (market value at date of grant) for thesixmonths endedJune 30, 2018is provided below (in millions). No performance units vested for the three months ended June 30, 2018 or for the three and six months ended June 30, 2017.

EnLink Midstream, LLC Performance Units:	Six Months Ended June 30, 2018
Aggregate intrinsic value of units vested	$	1.9
Fair value of units vested	$	4.2

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Derivatives (Tables)

6 Months Ended

Jun. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Components of Gain (Loss) on Derivative Activity

The components of gain (loss) on derivative activity in the consolidated statements of operations related to commodity swaps are (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Change in fair value of derivatives	$	(10.5	)	$	1.8		$	(14.0	)	$	7.1
Realized loss on derivatives	(4.7		)	(0.2		)	(0.7		)	(2.7		)
Gain (loss) on derivative activity	$	(15.2	)	$	1.6		$	(14.7	)	$	4.4

Fair Value of Derivative Assets and Liabilities Related to Commodity Swaps

The fair value of derivative assets and liabilities related to commodity swaps are as follows (in millions):

	June 30, 2018			December 31, 2017
Fair value of derivative assets—current	$	4.0		$	6.8
Fair value of derivative liabilities—current	(10.7		)	(8.4		)
Fair value of derivative liabilities—long-term	(8.9		)	—
Net fair value of derivatives	$	(15.6	)	$	(1.6	)

Notional Amount and Fair Value of Derivative Instruments

Set forth below are the summarized notional volumes and fair values of all instruments held for price risk management purposes and related physical offsets atJune 30, 2018(in millions). The remaining term of the contracts extend no later than October 2019.

		June 30, 2018
Commodity	Instruments	Unit	Volume		Fair Value
NGL (short contracts)	Swaps	Gallons	(46.9	)	$	(7.3	)
NGL (long contracts)	Swaps	Gallons	17.9		0.5
Natural Gas (short contracts)	Swaps	MMBtu	(9.7	)	1.4
Natural Gas (long contracts)	Swaps	MMBtu	7.5		(2.4		)
Crude and condensate (short contracts)	Swaps	MMbbls	(8.8	)	(12.1		)
Crude and condensate (long contracts)	Swaps	MMbbls	1.1		4.3
Total fair value of derivatives					$	(15.6	)

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Schedule of Net Assets (Liabilities) Measured on a Recurring Basis

Net assets (liabilities) measured at fair value on a recurring basis are summarized below (in millions):

	Level 2
	June 30, 2018			December 31, 2017
Commodity Swaps (1)	$	(15.6	)	$	(1.6	)

(1) The fair values of derivative contracts included in assets or liabilities for risk management activities represent the amount at which the instruments could be exchanged in a current arms-length transaction adjusted for our credit risk and/or the counterparty credit risk as required under ASC 820.

Schedule of the Estimated Fair Value of Financial Instruments

Considerable judgment is required to develop the estimates of fair value; thus, the estimates provided below are not necessarily indicative of the amount we could realize upon the sale or refinancing of such financial instruments (in millions):

	June 30, 2018				December 31, 2017
	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including current maturities of long-term debt (1)	$	4,073.9	$	3,795.2	$	3,542.1	$	3,650.2
Installment Payables	$	—	$	—	$	249.5	$	249.6
Obligations under capital lease	$	3.3	$	2.8	$	4.1	$	3.4
Secured term loan receivable	$	48.5	$	48.5	$	—	$	—

(1) The carrying value of long-term debt, including current maturities of long-term debt, is reduced by debt issuance costs of$24.3 million and $26.2 million at June 30, 2018 and December 31, 2017, respectively. The respective fair values do not factor in debt issuance costs.

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Summary of Financial Information

Summarized financial information for our reportable segments is shown in the following tables (in millions):

	Texas			Louisiana			Oklahoma			Crude and Condensate			Corporate			Totals
Three Months Ended June 30, 2018
Natural gas sales	$	56.8		$	122.7		$	37.9		$	—		$	—		$	217.4
NGL sales	—			627.9			3.6			0.3			—			631.8
Crude oil and condensate sales	—			0.1			—			585.8			—			585.9
Product sales	56.8			750.7			41.5			586.1			—			1,435.1
Natural gas sales—related parties	—			—			1.9			—			—			1.9
NGL sales—related parties	134.3			28.9			140.4			—			(278.6		)	25.0
Crude oil and condensate sales—related parties	15.1			0.1			23.6			1.7			(40.2		)	0.3
Product sales—related parties	149.4			29.0			165.9			1.7			(318.8		)	27.2
Gathering and transportation	13.5			16.7			25.6			0.9			—			56.7
Processing	9.5			1.1			47.4			—			—			58.0
NGL services	—			10.3			—			—			—			10.3
Crude services	—			—			(0.1		)	15.1			—			15.0
Other services	2.2			0.2			—			—			—			2.4
Midstream services	25.2			28.3			72.9			16.0			—			142.4
Gathering and transportation—related parties	61.4			—			38.7			—			—			100.1
Processing—related parties	46.8			—			23.1			—			—			69.9
Crude services—related parties	—			—			0.7			4.3			—			5.0
Other services—related parties	0.2			—			—			—			—			0.2
Midstream services—related parties	108.4			—			62.5			4.3			—			175.2
Revenue from contracts with customers	339.8			808.0			342.8			608.1			(318.8		)	1,779.9
Cost of sales	(178.7		)	(723.0		)	(170.3		)	(572.4		)	318.8			(1,325.6		)
Operating expenses	(45.8		)	(28.0		)	(20.8		)	(18.8		)	—			(113.4		)
Loss on derivative activity	—			—			—			—			(15.2		)	(15.2		)
Segment profit (loss)	$	115.3		$	57.0		$	151.7		$	16.9		$	(15.2	)	$	325.7
Depreciation and amortization	$	(53.4	)	$	(30.5	)	$	(46.4	)	$	(12.7	)	$	(2.3	)	$	(145.3	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	44.7		$	16.6		$	121.0		$	34.9		$	1.0		$	218.2
Three Months Ended June 30, 2017
Product sales	$	74.6		$	548.7		$	27.7		$	276.2		$	—		$	927.2
Product sales—related parties	115.5			5.4			62.4			—			(154.0		)	29.3
Midstream services	28.2			56.3			33.0			14.4			—			131.9
Midstream services—related parties	107.2			35.3			59.4			5.3			(33.6		)	173.6
Cost of sales	(177.0		)	(575.7		)	(99.0		)	(268.3		)	187.6			(932.4		)
Operating expenses	(42.9		)	(24.6		)	(14.7		)	(20.4		)	—			(102.6		)
Gain on derivative activity	—			—			—			—			1.6			1.6
Segment profit	$	105.6		$	45.4		$	68.8		$	7.2		$	1.6		$	228.6
Depreciation and amortization	$	(59.6	)	$	(29.4	)	$	(38.6	)	$	(12.6	)	$	(2.3	)	$	(142.5	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	39.7		$	15.6		$	135.0		$	13.7		$	14.5		$	218.5

	Texas			Louisiana			Oklahoma			Crude and Condensate			Corporate			Totals
Six Months Ended June 30, 2018
Natural gas sales	$	139.8		$	247.7		$	86.0		$	—		$	—		$	473.5
NGL sales	—			1,236.3			5.5			0.8			—			1,242.6
Crude oil and condensate sales	—			0.1			—			1,218.1			—			1,218.2
Product sales	139.8			1,484.1			91.5			1,218.9			—			2,934.3
Natural gas sales—related parties	—			—			2.4			—			—			2.4
NGL sales—related parties	227.3			34.5			240.5			—			(474.9		)	27.4
Crude oil and condensate sales—related parties	26.0			0.2			45.9			1.8			(72.9		)	1.0
Product sales—related parties	253.3			34.7			288.8			1.8			(547.8		)	30.8
Gathering and transportation	26.7			34.3			41.2			1.7			—			103.9
Processing	13.3			1.7			56.4			—			—			71.4
NGL services	—			26.9			—			—			—			26.9
Crude services	—			—			—			27.9			—			27.9
Other services	4.0			0.4			—			0.1			—			4.5
Midstream services	44.0			63.3			97.6			29.7			—			234.6
Gathering and transportation—related parties	114.0			—			73.4			—			—			187.4
Processing—related parties	98.4			—			45.2			—			—			143.6
Crude services—related parties	—			—			1.4			8.6			—			10.0
Other services—related parties	0.4			—			—			—			—			0.4
Midstream services—related parties	212.8			—			120.0			8.6			—			341.4
Revenue from contracts with customers	649.9			1,582.1			597.9			1,259.0			(547.8		)	3,541.1
Cost of sales	(340.2		)	(1,409.7		)	(309.3		)	(1,195.7		)	547.8			(2,707.1		)
Operating expenses	(90.0		)	(53.6		)	(41.5		)	(37.5		)	—			(222.6		)
Loss on derivative activity	—			—			—			—			(14.7		)	(14.7		)
Segment profit (loss)	$	219.7		$	118.8		$	247.1		$	25.8		$	(14.7	)	$	596.7
Depreciation and amortization	$	(105.9	)	$	(59.7	)	$	(88.5	)	$	(25.1	)	$	(4.2	)	$	(283.4	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	110.0		$	23.4		$	219.5		$	44.2		$	2.3		$	399.4
Six Months Ended June 30, 2017
Product sales	$	159.7		$	1,093.2		$	42.2		$	622.1		$	—		$	1,917.2
Product sales—related parties	222.0			15.6			126.8			0.8			(293.2		)	72.0
Midstream services	56.0			109.4			60.9			33.0			—			259.3
Midstream services—related parties	212.3			64.3			108.8			8.6			(61.4		)	332.6
Cost of sales	(356.2		)	(1,140.4		)	(187.7		)	(605.0		)	354.6			(1,934.7		)
Operating expenses	(86.8		)	(50.0		)	(28.8		)	(41.1		)	—			(206.7		)
Gain on derivative activity	—			—			—			—			4.4			4.4
Segment profit	$	207.0		$	92.1		$	122.2		$	18.4		$	4.4		$	444.1
Depreciation and amortization	$	(109.4	)	$	(57.5	)	$	(75.1	)	$	(24.1	)	$	(4.7	)	$	(270.8	)
Impairments	$	—		$	—		$	—		$	(7.0	)	$	—		$	(7.0	)
Goodwill	$	232.0		$	—		$	190.3		$	—		$	1,119.9		$	1,542.2
Capital expenditures	$	68.0		$	48.3		$	275.7		$	51.1		$	23.5		$	466.6

Schedule of Segment Assets

The table below represents information about segment assets as ofJune 30, 2018 and December 31, 2017 (in millions):

Segment Identifiable Assets:	June 30, 2018		December 31, 2017
Texas	$	3,139.3	$	3,094.8
Louisiana	2,391.1		2,408.5
Oklahoma	2,993.8		2,836.7
Crude and Condensate	1,005.0		929.5
Corporate	1,254.4		1,268.3
Total identifiable assets	$	10,783.6	$	10,537.8

Reconciliation of Profits to Operating Income (Loss)

The following table reconciles the segment profits reported above to the operating income as reported on the consolidated statements of operations (in millions):

	Three Months Ended June 30,						Six Months Ended June 30,
	2018			2017			2018			2017
Segment profit	$	325.7		$	228.6		$	596.7		$	444.1
General and administrative expenses	(30.4		)	(31.1		)	(57.9		)	(67.2		)
Gain (loss) on disposition of assets	(1.2		)	5.4			(1.3		)	0.3
Depreciation and amortization	(145.3		)	(142.5		)	(283.4		)	(270.8		)
Impairments	—			—			—			(7.0		)
Gain on litigation settlement	—			8.5			—			26.0
Operating income	$	148.8		$	68.9		$	254.1		$	125.4

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Other Information (Tables)

6 Months Ended

Jun. 30, 2018

Other Liabilities Disclosure [Abstract]

Schedule of Other Current Liabilities

The following tables present additional detail for other current assets and other current liabilities, which consists of the following (in millions):

Other Current Assets:	June 30, 2018		December 31, 2017
Natural gas and NGLs inventory	$	60.8	$	30.1
Secured term loan receivable from contract restructuring, net of discount of $1.6	17.9		—
Prepaid expenses and other	20.4		11.1
Natural gas and NGLs inventory, prepaid expenses, and other	$	99.1	$	41.2

Other Current Liabilities:	June 30, 2018		December 31, 2017
Accrued interest	$	36.6	$	35.6
Accrued wages and benefits, including taxes	18.0		30.4
Accrued ad valorem taxes	25.9		27.8
Capital expenditure accruals	41.8		48.8
Onerous performance obligations	17.9		15.2
Other	66.2		65.1
Other current liabilities	$	206.4	$	222.9

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General (Details)	6 Months Ended
	Jun. 30, 2018 shares
EnLink Midstream Partners, LP
Related Party Transaction [Line Items]
Units owned, limited partner interest (in shares)	88,528,451
Ownership interest	21.60%
Membership interest in the General Partner	0.40%
EnLink Midstream Partners GP, LLC
Related Party Transaction [Line Items]
Ownership interest	100.00%
EnLink Oklahoma T.O.
Related Party Transaction [Line Items]
Ownership interest	16.10%
Devon Energy Corporation | EnLink Midstream Partners, LP
Related Party Transaction [Line Items]
Membership interest in the General Partner	23.10%
Devon Energy Corporation | EnLink Midstream Partners GP, LLC
Related Party Transaction [Line Items]
Membership interest in the General Partner	100.00%
Devon Energy Corporation | ENLC
Related Party Transaction [Line Items]
Membership interest in the General Partner	63.80%

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Significant Accounting Policies - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Revenues		$ (1,764,700,000)	$ (1,263,600,000)	$ (3,526,400,000)	$ (2,585,500,000)
Expected gross operating margin from long-term purchase commitment	$ 135,100,000
Amount due from counterparty due to deficiency on MVC	19,700,000
Total principal payments to be received	$ 58,000,000
Financing receivable, interest rate	8.00%
Overriding royalty interest percentage	1.00%
Consideration received due to restructuring of contract		45,500,000
Expired rights-of-ways and abandoned brine disposal well
Property, Plant and Equipment [Line Items]
Impairment of long-lived assets				0	$ 7,000,000
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Property, Plant and Equipment [Line Items]
Revenues		$ 163,000,000		$ 301,000,000
Percentage decrease in revenue from contracts with customers		9.00%		8.00%

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Significant Accounting Policies - Summary of Changes in Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	$ 1,779.9		$ 3,541.1
Product sales
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	1,435.1	$ 927.2	2,934.3	$ 1,917.2
Product sales—related parties
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	27.2	29.3	30.8	72.0
Midstream services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	142.4	131.9	234.6	259.3
Midstream services—related parties
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	175.2	$ 173.6	341.4	$ 332.6
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	(163.0)		(301.0)
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Product sales
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	(46.0)		(78.0)
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Product sales—related parties
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	(24.0)		(46.0)
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Midstream services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	(76.0)		(153.0)
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606 | Midstream services—related parties
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contracts with customers	$ (17.0)		$ (24.0)

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Significant Accounting Policies - Summary of Future Performance Obligations (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected gross operating margin expected to be recognized in future periods	$ 388.4
Expected gross operating margin expected to be recognized, period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected gross operating margin expected to be recognized in future periods	$ 235.8
Expected gross operating margin expected to be recognized, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected gross operating margin expected to be recognized in future periods	$ 224.8
Expected gross operating margin expected to be recognized, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected gross operating margin expected to be recognized in future periods	$ 82.2
Expected gross operating margin expected to be recognized, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected gross operating margin expected to be recognized in future periods	$ 71.9
Expected gross operating margin expected to be recognized, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Expected gross operating margin expected to be recognized in future periods	$ 1,234.3
Expected gross operating margin expected to be recognized, period

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Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 30.9	$ 35.5	$ 61.7	$ 65.0
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets			10 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets			20 years
Weighted average
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of intangible assets			15 years

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Intangible Assets - Changes in Carrying Value (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Finite-lived Intangible Assets [Roll Forward]
Accumulated Amortization, Beginning Balance			$ (298.7)
Accumulated Amortization, Amortization expense	$ (30.9)	$ (35.5)	(61.7)	$ (65.0)
Accumulated Amortization, Ending Balance	(360.4)		(360.4)
EnLink Midstream Partners, LP
Finite-lived Intangible Assets [Roll Forward]
Net Carrying Amount, Ending Balance	1,435.4		1,435.4
Customer relationships | EnLink Midstream Partners, LP
Finite-lived Intangible Assets [Roll Forward]
Gross Carrying Amount, Beginning Balance			1,795.8
Accumulated Amortization, Beginning Balance			(298.7)
Net Carrying Amount, Beginning Balance			1,497.1
Accumulated Amortization, Amortization expense			(61.7)
Gross Carrying Amount, Ending Balance	1,795.8		1,795.8
Accumulated Amortization, Ending Balance	(360.4)		(360.4)
Net Carrying Amount, Ending Balance	$ 1,435.4		$ 1,435.4

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Intangible Assets - Amortization Expense (Details) - EnLink Midstream Partners, LP $ in Millions	Jun. 30, 2018 USD ($)
Finite-Lived Intangible Assets [Line Items]
2018 (remaining)	$ 61.8
2019	123.4
2020	123.4
2021	123.4
2022	123.4
Thereafter	880.0
Total	$ 1,435.4

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Related Party Transactions (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Transaction [Line Items]
Accounts payable to related party		$ 30.5		$ 30.5		$ 16.3
Cost of sales	[1]	1,325.6	$ 932.4	2,707.1	$ 1,934.7
Devon Energy Corporation
Related Party Transaction [Line Items]
Accounts receivable balance		122.1		122.1		102.7
Accounts payable to related party		$ 27.0		$ 27.0		$ 16.3
Devon Energy Corporation | Customer Concentration Risk | Sales Revenue, Net
Related Party Transaction [Line Items]
Concentration risk		11.50%	15.80%	10.60%	15.30%
Cedar Cove Joint Venture
Related Party Transaction [Line Items]
Accounts receivable balance		$ 0.6		$ 0.6
Accounts payable to related party		3.5		3.5
Cost of sales		$ 9.5	$ 4.3	$ 22.5	$ 5.5

[1] Includes related party cost of sales of $46.7 million and $50.9 million for the three months ended June 30, 2018 and 2017, respectively, and $80.8 million and $79.6 million for the six months ended June 30, 2018 and 2017, respectively.

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Long-Term Debt - Summary (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	May 31, 2017
Debt Instrument
Outstanding Principal	$ 4,104.4	$ 3,574.6
Premium (Discount)	(6.2)	(6.3)
Long-Term Debt	4,098.2	3,568.3
Debt issuance costs	(24.3)	(26.2)
Less: Current maturities of long-term debt	(483.7)	0.0
Long-term debt, net of unamortized issuance cost	3,590.2	3,542.1
Debt issuance cost accumulated amortization	$ 14.8	12.9
ENLK credit facility due 2020
Debt Instrument
Effective interest rate	3.60%
ENLK credit facility due 2020 | EnLink Midstream Partners, LP
Debt Instrument
Outstanding Principal	$ 520.0	0.0
Premium (Discount)	0.0	0.0
Long-Term Debt	520.0	0.0
ENLC credit facility due 2019
Debt Instrument
Outstanding Principal	84.4	74.6
Premium (Discount)	0.0	0.0
Long-Term Debt	$ 84.4	$ 74.6
Effective interest rate	3.90%	3.20%
ENLK’s 2.70% Senior unsecured notes due 2019
Debt Instrument
Stated interest rate	2.70%
Outstanding Principal	$ 400.0	$ 400.0
Premium (Discount)	(0.1)	(0.1)
Long-Term Debt	$ 399.9	399.9
ENLK’s 4.40% Senior unsecured notes due 2024
Debt Instrument
Stated interest rate	4.40%
Outstanding Principal	$ 550.0	550.0
Premium (Discount)	2.0	2.2
Long-Term Debt	$ 552.0	552.2
ENLK’s 4.15% Senior unsecured notes due 2025
Debt Instrument
Stated interest rate	4.15%
Outstanding Principal	$ 750.0	750.0
Premium (Discount)	(0.9)	(1.0)
Long-Term Debt	$ 749.1	749.0
ENLK’s 4.85% Senior unsecured notes due 2026
Debt Instrument
Stated interest rate	4.85%
Outstanding Principal	$ 500.0	500.0
Premium (Discount)	(0.6)	(0.6)
Long-Term Debt	$ 499.4	499.4
ENLK’s 5.60% Senior unsecured notes due 2044
Debt Instrument
Stated interest rate	5.60%
Outstanding Principal	$ 350.0	350.0
Premium (Discount)	(0.2)	(0.2)
Long-Term Debt	$ 349.8	349.8
ENLK’s 5.05% Senior unsecured notes due 2045
Debt Instrument
Stated interest rate	5.05%
Outstanding Principal	$ 450.0	450.0
Premium (Discount)	(6.3)	(6.5)
Long-Term Debt	$ 443.7	443.5
ENLK's 5.45% Senior unsecured notes due 2047
Debt Instrument
Stated interest rate	5.45%		5.45%
Outstanding Principal	$ 500.0	500.0
Premium (Discount)	(0.1)	(0.1)
Long-Term Debt	$ 499.9	$ 499.9

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Long-Term Debt - Narrative (Details)	6 Months Ended
	Jun. 30, 2018 USD ($) extension subsidiary shares	Dec. 31, 2017 USD ($)
ENLC credit facility due 2019
Debt Instrument
Maximum borrowing capacity	$ 250,000,000.0
Units owned, limited partner interest (in shares) | shares	88,528,451
Membership interest in the General Partner	100.00%
Ownership interest	100.00%
Maximum consolidated leverage ratio	0.0450
Outstanding borrowings	$ 84,400,000	$ 74,600,000
Amount available for future borrowings	165,600,000
ENLC credit facility due 2019 | Letters of credit
Debt Instrument
Outstanding letters of credit	$ 0
ENLC credit facility due 2019 | Maximum
Debt Instrument
Ratio of consolidated indebtedness to consolidated EBITDA	0.0400
ENLC credit facility due 2019 | Minimum
Debt Instrument
Ratio of consolidated indebtedness to consolidated EBITDA	0.0250
ENLC credit facility due 2019 | Letter of Credit
Debt Instrument
Maximum borrowing capacity	$ 125,000,000.0
Number of wholly-owned subsidiaries that are used as the guarantee | subsidiary	2
ENLC credit facility due 2019 | LIBOR | Maximum
Debt Instrument
Variable rate	2.50%
ENLC credit facility due 2019 | LIBOR | Minimum
Debt Instrument
Variable rate	1.75%
ENLC credit facility due 2019 | Federal Funds
Debt Instrument
Variable rate	0.50%
ENLC credit facility due 2019 | Eurodollar
Debt Instrument
Variable rate	1.00%
ENLC credit facility due 2019 | Eurodollar | Maximum
Debt Instrument
Variable rate	1.50%
ENLC credit facility due 2019 | Eurodollar | Minimum
Debt Instrument
Variable rate	0.75%
ENLK credit facility due 2020 | EnLink Midstream Partners, LP
Debt Instrument
Maximum borrowing capacity	$ 1,500,000,000
Ratio of consolidated indebtedness to consolidated EBITDA	0.050
Outstanding borrowings	$ 520,000,000	$ 0
Amount available for future borrowings	970,700,000
Additional amount available (not to exceed)	$ 500,000,000
Number of allowed extensions | extension	2
Extension period	1 year
Conditional acquisition purchase price (or more)	$ 50,000,000.0
ENLK credit facility due 2020 | EnLink Midstream Partners, LP | Letters of credit
Debt Instrument
Maximum borrowing capacity	500,000,000.0
Outstanding letters of credit	$ 9,300,000
ENLK credit facility due 2020 | Maximum | EnLink Midstream Partners, LP
Debt Instrument
Ratio of consolidated indebtedness to consolidated EBITDA	0.055
ENLK credit facility due 2020 | LIBOR | Maximum | EnLink Midstream Partners, LP
Debt Instrument
Variable rate	1.75%
ENLK credit facility due 2020 | LIBOR | Minimum | EnLink Midstream Partners, LP
Debt Instrument
Variable rate	1.00%
ENLK credit facility due 2020 | Federal Funds | EnLink Midstream Partners, LP
Debt Instrument
Variable rate	0.50%
ENLK credit facility due 2020 | Eurodollar | EnLink Midstream Partners, LP
Debt Instrument
Variable rate	1.00%
ENLK credit facility due 2020 | Eurodollar | Maximum | EnLink Midstream Partners, LP
Debt Instrument
Variable rate	0.75%
ENLK credit facility due 2020 | Eurodollar | Minimum | EnLink Midstream Partners, LP
Debt Instrument
Variable rate	0.00%

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Current income tax provision (benefit)	$ (0.3)	$ (1.0)	$ 0.9	$ (0.2)
Deferred income tax provision	6.6	4.2	12.4	6.4
Total income tax provision	6.3	3.2	13.3	6.2
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Expected income tax provision based on federal statutory rate	7.2	3.1	11.3	3.5
State income taxes expense, net of federal tax benefit	0.8	0.3	1.3	0.3
Income tax expense (benefit) from ENLK	(2.0)	(0.3)	(1.0)	0.2
Unit-based compensation	(0.1)	0.0	1.5	2.3
Other	0.4	0.1	0.2	(0.1)
Total income tax provision	$ 6.3	$ 3.2	$ 13.3	$ 6.2

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Certain Provisions of the Partnership Agreement - Narrative and Distributions (Details) - USD ($)	3 Months Ended							6 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Aug. 31, 2017
Partnership agreement
Proceeds from sale of common units								$ 900,000	$ 72,200,000
Distribution declared/unit (in dollars per share)	$ 0.267000000	$ 0.263	$ 0.259	$ 0.267	$ 0.255	$ 0.255	$ 0.255	$ 0.267000000
EnLink Midstream Partners, LP
Partnership agreement
Percentage of available cash to distribute								100.00%
Period after quarter for distribution								45 days
EnLink Midstream Partners, LP | General Partner | Incentive Distribution Level 1
Partnership agreement
Incentive distribution for general partner								13.00%
Incentive distribution, conditional distribution per unit (in dollars per share)								$ 0.25
EnLink Midstream Partners, LP | General Partner | Incentive Distribution Level 2
Partnership agreement
Incentive distribution for general partner								23.00%
Incentive distribution, conditional distribution per unit (in dollars per share)								$ 0.3125
EnLink Midstream Partners, LP | General Partner | Incentive Distribution Level 3
Partnership agreement
Incentive distribution for general partner								48.00%
Incentive distribution, conditional distribution per unit (in dollars per share)								$ 0.375
EnLink Midstream Partners, LP | 2017 EDA
Partnership agreement
Commission fees								$ 100,000
Common units | EnLink Midstream Partners, LP
Partnership agreement
Shelf registration for issuance of common units (up to)										$ 600,000,000.0
Distribution declared/unit (in dollars per share)	$ 0.39	$ 0.39	$ 0.39	$ 0.39	$ 0.39	$ 0.39
Common units | EnLink Midstream Partners, LP | 2017 EDA
Partnership agreement
Common units sold								100,000
Proceeds from sale of common units								$ 900,000
Series B Preferred Unitholders
Partnership agreement
Distribution declared/unit (in dollars per share)								$ 0.28125
Distribution paid-in kind (in shares)	419,678	416,657	413,658	1,178,672	1,154,147	1,130,131
Proceeds from issuance of ENLK Series Preferred Units	$ 16,300,000	$ 16,200,000	$ 16,000,000	$ 0	$ 0	$ 0
Series C Preferred Unitholders
Partnership agreement
Distributions to preferred unitholders								$ 12,000,000
Limited Partner | Common units | EnLink Midstream Partners, LP | 2017 EDA
Partnership agreement
Amount of equity security remaining under equity distribution agreement	$ 564,500,000							$ 564,500,000
Limited Partner | Series B Preferred Unitholders
Partnership agreement
Shares issued, price per share (in dollars per share)	$ 15.00							$ 15.00
Limited Partner | Series B Preferred Unitholders | EnLink Midstream Partners, LP
Partnership agreement
Annual rate on issue price payable in kind								0.25%
Limited Partner | Series C Preferred Unitholders | EnLink Midstream Partners, LP
Partnership agreement
Partners' capital account, dividend rate, percentage								6.00%

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Certain Provisions of the Partnership Agreement - Allocation of Income (Details) - General Partner - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Incentive distribution
Income allocation for incentive distributions	$ 14.8	$ 14.6	$ 29.6	$ 29.3
Unit-based compensation attributable to ENLC’s restricted units	(4.0)	(3.9)	(8.4)	(12.7)
General Partner share of net income	0.4	0.1	0.6	0.1
General Partner interest in net income	$ 11.2	$ 10.8	$ 21.8	$ 16.7

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Members' Equity - Computation and Distribution Activity (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended							6 Months Ended
	May 15, 2018	Aug. 14, 2017	May 15, 2017	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
ENLC interest in net income				$ 28.0			$ 5.9				$ 40.4	$ 4.0
Distributed earnings allocated to:
Total distributed earnings				49.1			46.7				97.2	93.2
Undistributed loss allocated to:
Total undistributed loss				(21.1)			(40.8)				(56.8)	(89.2)
Net income allocated to:
Total net income				$ 28.0			$ 5.9				$ 40.4	$ 4.0
Basic and diluted net income per unit:
Basic (in dollars per share)				$ 0.15			$ 0.03				$ 0.22	$ 0.02
Diluted (in dollars per share)				0.15			0.03				0.22	$ 0.02
Distribution declared/unit (in dollars per share)				$ 0.267000000	$ 0.263	$ 0.259	$ 0.267	$ 0.255	$ 0.255	$ 0.255	$ 0.267000000
Distribution paid per unit (in dollars per share)	$ 0.263000000	$ 0.255000000	$ 0.255000000
Unvested restricted units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
ENLC interest in net income				$ 0.5			$ 0.1				$ 0.6	$ 0.1
Distributed earnings allocated to:
Total distributed earnings				0.8			0.6				1.3	1.2
Undistributed loss allocated to:
Total undistributed loss				(0.3)			(0.5)				(0.7)	(1.1)
Net income allocated to:
Total net income				0.5			0.1				0.6	0.1
Common units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
ENLC interest in net income				27.5			5.8				39.8	3.9
Distributed earnings allocated to:
Total distributed earnings				48.3			46.1				95.9	92.0
Undistributed loss allocated to:
Total undistributed loss				(20.8)			(40.3)				(56.1)	(88.1)
Net income allocated to:
Total net income				$ 27.5			$ 5.8				$ 39.8	$ 3.9

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Members' Equity - Components to Compute Basic and Diluted Earnings per Unit (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic weighted average units outstanding:
Weighted average common units outstanding (in shares)	181.0	180.6	181.0	180.4
Diluted weighted average units outstanding:
Weighted average basic common units outstanding (in shares)	181.0	180.6	181.0	180.4
Dilutive effect of non-vested restricted incentive units (in shares)	1.2	1.1	1.0	1.2
Total weighted average diluted common units outstanding (in shares)	182.2	181.7	182.0	181.6

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Investment in Unconsolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Equity method investments
Distributions	$ 5.4	$ 4.5	$ 11.4	$ 7.4
Equity in income (loss)	4.4	(0.1)	7.4	0.6
Contributions	0.1	4.3	0.1	10.3
Total investment in unconsolidated affiliates	$ 85.5		$ 85.5		$ 89.4
GCF
Equity method investments
Ownership interest	38.75%		38.75%
Distributions	$ 5.4	4.4	$ 11.1	7.1
Equity in income (loss)	4.8	0.0	9.4	4.0
HEP
Equity method investments
Equity in income (loss)	$ 0.0	0.0	$ 0.0	(3.4)
Cedar Cove JV
Equity method investments
Ownership interest	30.00%		30.00%
Distributions	$ 0.0	0.1	$ 0.3	0.3
Equity in income (loss)	(0.4)	(0.1)	(2.0)	0.0
Contributions	0.1	$ 4.3	0.1	$ 10.3
EnLink Midstream Partners, LP
Equity method investments
Total investment in unconsolidated affiliates	85.5		85.5		89.4
EnLink Midstream Partners, LP | GCF
Equity method investments
Total investment in unconsolidated affiliates	46.7		46.7		48.4
EnLink Midstream Partners, LP | Cedar Cove JV
Equity method investments
Total investment in unconsolidated affiliates	$ 38.8		$ 38.8		$ 41.0

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Employee Incentive Plans - Amounts Recognized in Consolidated Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Allocation
Compensation expense	$ 9.6	$ 9.3	$ 14.7	$ 28.7
Amount of related income tax benefit recognized in net income	1.2	2.1	1.9	6.7
Tax expense excluded from income tax benefit	(0.1)	0.0	1.5	2.3
Cost of unit-based compensation charged to operating expense
Allocation
Compensation expense	2.3	2.6	4.3	7.6
Cost of unit-based compensation charged to general and administrative expense
Allocation
Compensation expense	7.3	6.7	10.4	21.1
Non-controlling interest in unit-based compensation
Allocation
Compensation expense	$ 3.6	$ 3.5	$ 5.5	$ 10.8

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Employee Incentive Plans - Restricted and Performance Awards (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restricted incentive units
Number of Units
Non-vested, beginning of period (in shares)				1,889,310
Granted (in shares)	194,185			1,059,062
Vested (in shares)				(556,262)
Forfeited (in shares)				(138,187)
Non-vested, end of period (in shares)		2,253,923		2,253,923
Aggregate intrinsic value, end of period		$ 37.1		$ 37.1
Weighted Average Grant-Date Fair Value
Non-vested, beginning of period (in dollars per share)				$ 16.33
Granted (in dollars per share)				15.67
Vested (in dollars per share)				24.24
Forfeited (in dollars per share)				12.24
Non-vested, end of period (in dollars per share)		$ 14.32		$ 14.32
Fair value of units vested	$ 3.0	$ 0.4	$ 0.4	$ 13.5	$ 20.8
Units withheld for payroll taxes (in shares)				178,824
Aggregate intrinsic value of units vested		0.4	0.3	$ 9.3	14.6
Unrecognized compensation cost related to non-vested restricted incentive units		$ 19.2		$ 19.2
Unrecognized compensation costs, weighted average period for recognition				1 year 11 months
Vesting period				3 years
Restricted incentive units | EnLink Midstream Partners, LP
Number of Units
Non-vested, beginning of period (in shares)				1,980,224
Granted (in shares)	200,753			1,166,464
Vested (in shares)				(601,581)
Forfeited (in shares)				(148,572)
Non-vested, end of period (in shares)		2,396,535		2,396,535
Aggregate intrinsic value, end of period		$ 37.2		$ 37.2
Weighted Average Grant-Date Fair Value
Non-vested, beginning of period (in dollars per share)				$ 15.81
Granted (in dollars per share)				15.15
Vested (in dollars per share)				22.04
Forfeited (in dollars per share)				12.29
Non-vested, end of period (in dollars per share)		$ 14.14		$ 14.14
Fair value of units vested	$ 3.0	$ 0.5	0.5	$ 13.3	21.0
Units withheld for payroll taxes (in shares)				189,584
Aggregate intrinsic value of units vested		0.4	$ 0.4	$ 9.1	$ 15.7
Unrecognized compensation cost related to non-vested restricted incentive units		$ 20.2		$ 20.2
Unrecognized compensation costs, weighted average period for recognition				1 year 11 months
Vesting period				3 years
Performance units
Number of Units
Non-vested, beginning of period (in shares)				548,839
Granted (in shares)				223,865
Vested (in shares)		0	0	(102,555)	0
Forfeited (in shares)				(70,918)
Non-vested, end of period (in shares)		599,231		599,231
Aggregate intrinsic value, end of period		$ 9.9		$ 9.9
Weighted Average Grant-Date Fair Value
Non-vested, beginning of period (in dollars per share)				$ 22.14
Granted (in dollars per share)				21.63
Vested (in dollars per share)				40.48
Forfeited (in dollars per share)				17.75
Non-vested, end of period (in dollars per share)		$ 19.33		$ 19.33
Fair value of units vested				$ 4.2
Units withheld for payroll taxes (in shares)				28,846
Aggregate intrinsic value of units vested				$ 1.9
Unrecognized compensation cost related to non-vested restricted incentive units		$ 7.5		$ 7.5
Unrecognized compensation costs, weighted average period for recognition				2 years
Vesting period				3 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Beginning TSR Price (in dollars per share)	$ 16.55
Risk-free interest rate	2.38%
Volatility factor	51.36%
Distribution yield	6.70%
Performance units | Minimum
Weighted Average Grant-Date Fair Value
Percent of units vesting				0.00%
Performance units | Maximum
Weighted Average Grant-Date Fair Value
Percent of units vesting				200.00%
Performance units | EnLink Midstream Partners, LP
Number of Units
Non-vested, beginning of period (in shares)				585,285
Granted (in shares)				256,345
Vested (in shares)		0	0	(115,328)	0
Forfeited (in shares)				(76,351)
Non-vested, end of period (in shares)		649,951		649,951
Aggregate intrinsic value, end of period		$ 10.1		$ 10.1
Weighted Average Grant-Date Fair Value
Non-vested, beginning of period (in dollars per share)				$ 20.52
Granted (in dollars per share)				19.24
Vested (in dollars per share)				35.39
Forfeited (in dollars per share)				16.62
Non-vested, end of period (in dollars per share)		$ 17.83		$ 17.83
Fair value of units vested				$ 4.1
Units withheld for payroll taxes (in shares)				34,069
Aggregate intrinsic value of units vested				$ 2.0
Unrecognized compensation cost related to non-vested restricted incentive units		$ 7.4		$ 7.4
Unrecognized compensation costs, weighted average period for recognition				2 years
Vesting period				3 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Beginning TSR Price (in dollars per share)	$ 15.44
Risk-free interest rate	2.38%
Volatility factor	43.85%
Distribution yield	10.50%
Performance units | EnLink Midstream Partners, LP | Minimum
Weighted Average Grant-Date Fair Value
Percent of units vesting				0.00%
Performance units | EnLink Midstream Partners, LP | Maximum
Weighted Average Grant-Date Fair Value
Percent of units vesting				200.00%

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Derivatives - Interest Rate Swaps (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	May 31, 2017
Derivatives
Accumulated other comprehensive loss	$ 2.0	$ 2.0	$ 2.2
Interest income (expense) expected to be reclassified out of accumulated other comprehensive income (loss) over the next twelve months	$ (0.1)
ENLK's 5.45% Senior unsecured notes due 2047
Derivatives
Stated interest rate	5.45%		5.45%

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Derivatives - Components of Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Derivatives
Gain (loss) on derivative activity	$ (15.2)	$ 1.6	$ (14.7)	$ 4.4
EnLink Midstream Partners, LP | Commodity Swaps
Derivatives
Change in fair value of derivatives	(10.5)	1.8	(14.0)	7.1
Realized loss on derivatives	(4.7)	(0.2)	(0.7)	(2.7)
Gain (loss) on derivative activity	$ (15.2)	$ 1.6	$ (14.7)	$ 4.4

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Derivatives - Fair Value of Assets and Liabilities (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Derivatives
Fair value of derivative assets—current	$ 4,000,000	$ 6,800,000
Fair value of derivative liabilities—current	(10,700,000)	(8,400,000)
Fair value of derivative liabilities	(8,900,000)	0
EnLink Midstream Partners, LP
Derivatives
Fair value of derivative assets—current	4,000,000	6,800,000
Fair value of derivative liabilities—current	(10,700,000)	(8,400,000)
Fair value of derivative liabilities	(8,900,000)	0
Net fair value of derivatives	(15,600,000)	(1,600,000)
Fair value of derivative assets — long-term	$ 0	$ 0

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Derivatives - Commodities (Details) - EnLink Midstream Partners, LP gal in Millions, MMBbls in Millions, MMBTU in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2018 USD ($) MMBTU gal MMBbls	Dec. 31, 2017 USD ($)
Derivatives
Fair Value	$ (15.6)	$ (1.6)
Commodity
Derivatives
Fair Value	(15.6)
Maximum loss if counterparties fail to perform	$ 8.3
Commodity | NGL | Short
Derivatives
Notional amount (in gallons and mmbls) | gal	46.9
Fair Value	$ (7.3)
Commodity | NGL | Long
Derivatives
Notional amount (in gallons and mmbls) | gal	17.9
Fair Value	$ 0.5
Commodity | Natural Gas | Short
Derivatives
Notional amount (in mmbtu) | MMBTU	9.7
Fair Value	$ 1.4
Commodity | Natural Gas | Long
Derivatives
Notional amount (in mmbtu) | MMBTU	7.5
Fair Value	$ (2.4)
Commodity | Crude and condensate | Short
Derivatives
Notional amount (in gallons and mmbls) | MMBbls	8.8
Fair Value	$ (12.1)
Commodity | Crude and condensate | Long
Derivatives
Notional amount (in gallons and mmbls) | MMBbls	1.1
Fair Value	$ 4.3

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Fair Value Measurements - Recurring (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Level 2 | Commodity Swaps | Recurring
Fair Value
Fair Value	$ (15.6)	$ (1.6)

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Fair Value Measurements - Financial Instruments (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Fair Value
Debt issuance costs, noncurrent	$ (24,300,000)	$ (26,200,000)
ENLC credit facility due 2019
Fair Value
Outstanding borrowings	84,400,000	74,600,000
EnLink Midstream Partners, LP
Fair Value
Senior unsecured debt	$ 3,500,000,000	$ 3,500,000,000
EnLink Midstream Partners, LP | Minimum
Fair Value
Stated interest rate	2.70%	2.70%
EnLink Midstream Partners, LP | Maximum
Fair Value
Stated interest rate	5.60%	5.60%
EnLink Midstream Partners, LP | ENLK credit facility due 2020
Fair Value
Outstanding borrowings	$ 520,000,000	$ 0
EnLink Midstream Partners, LP | Carrying Value
Fair Value
Long-term debt	4,073,900,000	3,542,100,000
Installment Payables	0	249,500,000
Obligations under capital lease	3,300,000	4,100,000
Secured term loan receivable	48,500,000	0
EnLink Midstream Partners, LP | Fair Value
Fair Value
Long-term debt	3,795,200,000	3,650,200,000
Installment Payables	0	249,600,000
Obligations under capital lease	2,800,000	3,400,000
Secured term loan receivable	$ 48,500,000	$ 0

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Segment Information - Financial Information and Assets (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Segment Reporting
Revenue from contracts with customers		$ 1,779.9		$ 3,541.1
Cost of sales	[1]	(1,325.6)	$ (932.4)	(2,707.1)	$ (1,934.7)
Operating expenses		(113.4)	(102.6)	(222.6)	(206.7)
Gain (loss) on derivative activity		(15.2)	1.6	(14.7)	4.4
Segment profit		325.7	228.6	596.7	444.1
Depreciation and amortization		(145.3)	(142.5)	(283.4)	(270.8)
Impairments		0.0	0.0	0.0	(7.0)
Goodwill		1,542.2	1,542.2	1,542.2	1,542.2	$ 1,542.2
Capital expenditures		218.2	218.5	399.4	466.6
Total identifiable assets		10,783.6		10,783.6		10,537.8
Corporate
Segment Reporting
Revenue from contracts with customers		(318.8)		(547.8)
Cost of sales		318.8	187.6	547.8	354.6
Operating expenses		0.0	0.0	0.0	0.0
Gain (loss) on derivative activity		(15.2)	1.6	(14.7)	4.4
Segment profit		(15.2)	1.6	(14.7)	4.4
Depreciation and amortization		(2.3)	(2.3)	(4.2)	(4.7)
Impairments					0.0
Goodwill		1,119.9	1,119.9	1,119.9	1,119.9
Capital expenditures		1.0	14.5	2.3	23.5
Total identifiable assets		1,254.4		1,254.4		1,268.3
Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		339.8		649.9
Cost of sales		(178.7)	(177.0)	(340.2)	(356.2)
Operating expenses		(45.8)	(42.9)	(90.0)	(86.8)
Gain (loss) on derivative activity		0.0	0.0	0.0	0.0
Segment profit		115.3	105.6	219.7	207.0
Depreciation and amortization		(53.4)	(59.6)	(105.9)	(109.4)
Impairments					0.0
Goodwill		232.0	232.0	232.0	232.0
Capital expenditures		44.7	39.7	110.0	68.0
Total identifiable assets		3,139.3		3,139.3		3,094.8
Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		808.0		1,582.1
Cost of sales		(723.0)	(575.7)	(1,409.7)	(1,140.4)
Operating expenses		(28.0)	(24.6)	(53.6)	(50.0)
Gain (loss) on derivative activity		0.0	0.0	0.0	0.0
Segment profit		57.0	45.4	118.8	92.1
Depreciation and amortization		(30.5)	(29.4)	59.7	(57.5)
Impairments					0.0
Goodwill		0.0	0.0	0.0	0.0
Capital expenditures		16.6	15.6	23.4	48.3
Total identifiable assets		2,391.1		2,391.1		2,408.5
Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		342.8		597.9
Cost of sales		(170.3)	(99.0)	(309.3)	(187.7)
Operating expenses		(20.8)	(14.7)	(41.5)	(28.8)
Gain (loss) on derivative activity		0.0	0.0	0.0	0.0
Segment profit		151.7	68.8	247.1	122.2
Depreciation and amortization		(46.4)	(38.6)	(88.5)	(75.1)
Impairments					0.0
Goodwill		190.3	190.3	190.3	190.3
Capital expenditures		121.0	135.0	219.5	275.7
Total identifiable assets		2,993.8		2,993.8		2,836.7
Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		608.1		1,259.0
Cost of sales		(572.4)	(268.3)	(1,195.7)	(605.0)
Operating expenses		(18.8)	(20.4)	(37.5)	(41.1)
Gain (loss) on derivative activity		0.0	0.0	0.0	0.0
Segment profit		16.9	7.2	25.8	18.4
Depreciation and amortization		(12.7)	(12.6)	(25.1)	(24.1)
Impairments					(7.0)
Goodwill		0.0	0.0	0.0	0.0
Capital expenditures		34.9	13.7	44.2	51.1
Total identifiable assets		1,005.0		1,005.0		$ 929.5
Product sales
Segment Reporting
Revenue from contracts with customers		1,435.1	927.2	2,934.3	1,917.2
Product sales | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Product sales | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		56.8	74.6	139.8	159.7
Product sales | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		750.7	548.7	1,484.1	1,093.2
Product sales | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		41.5	27.7	91.5	42.2
Product sales | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		586.1	276.2	1,218.9	622.1
Product sales, Natural gas sales
Segment Reporting
Revenue from contracts with customers		217.4		473.5
Product sales, Natural gas sales | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, Natural gas sales | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		56.8		139.8
Product sales, Natural gas sales | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		122.7		247.7
Product sales, Natural gas sales | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		37.9		86.0
Product sales, Natural gas sales | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, NGL sales
Segment Reporting
Revenue from contracts with customers		631.8		1,242.6
Product sales, NGL sales | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, NGL sales | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, NGL sales | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		627.9		1,236.3
Product sales, NGL sales | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		3.6		5.5
Product sales, NGL sales | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.3		0.8
Product sales, Crude oil and condensate sales
Segment Reporting
Revenue from contracts with customers		585.9		1,218.2
Product sales, Crude oil and condensate sales | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, Crude oil and condensate sales | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, Crude oil and condensate sales | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.1		0.1
Product sales, Crude oil and condensate sales | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, Crude oil and condensate sales | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		585.8		1,218.1
Product sales—related parties
Segment Reporting
Revenue from contracts with customers		27.2	29.3	30.8	72.0
Product sales—related parties | Corporate
Segment Reporting
Revenue from contracts with customers		(318.8)	(154.0)	(547.8)	(293.2)
Product sales—related parties | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		149.4	115.5	253.3	222.0
Product sales—related parties | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		29.0	5.4	34.7	15.6
Product sales—related parties | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		165.9	62.4	288.8	126.8
Product sales—related parties | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		1.7	0.0	1.8	0.8
Product sales, Natural gas sales, related party
Segment Reporting
Revenue from contracts with customers		1.9		2.4
Product sales, Natural gas sales, related party | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, Natural gas sales, related party | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, Natural gas sales, related party | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, Natural gas sales, related party | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		1.9		2.4
Product sales, Natural gas sales, related party | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, NGL sales, related party
Segment Reporting
Revenue from contracts with customers		25.0		27.4
Product sales, NGL sales, related party | Corporate
Segment Reporting
Revenue from contracts with customers		(278.6)		(474.9)
Product sales, NGL sales, related party | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		134.3		227.3
Product sales, NGL sales, related party | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		28.9		34.5
Product sales, NGL sales, related party | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		140.4		240.5
Product sales, NGL sales, related party | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Product sales, Crude oil and condensate sales, related party
Segment Reporting
Revenue from contracts with customers		0.3		1.0
Product sales, Crude oil and condensate sales, related party | Corporate
Segment Reporting
Revenue from contracts with customers		(40.2)		(72.9)
Product sales, Crude oil and condensate sales, related party | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		15.1		26.0
Product sales, Crude oil and condensate sales, related party | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.1		0.2
Product sales, Crude oil and condensate sales, related party | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		23.6		45.9
Product sales, Crude oil and condensate sales, related party | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		1.7		1.8
Midstream services
Segment Reporting
Revenue from contracts with customers		142.4	131.9	234.6	259.3
Midstream services | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		25.2	28.2	44.0	56.0
Midstream services | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		28.3	56.3	63.3	109.4
Midstream services | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		72.9	33.0	97.6	60.9
Midstream services | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		16.0	14.4	29.7	33.0
Midstream services, Gathering and transportation
Segment Reporting
Revenue from contracts with customers		56.7		103.9
Midstream services, Gathering and transportation | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Gathering and transportation | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		13.5		26.7
Midstream services, Gathering and transportation | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		16.7		34.3
Midstream services, Gathering and transportation | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		25.6		41.2
Midstream services, Gathering and transportation | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.9		1.7
Midstream services, Processing
Segment Reporting
Revenue from contracts with customers		58.0		71.4
Midstream services, Processing | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Processing | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		9.5		13.3
Midstream services, Processing | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		1.1		1.7
Midstream services, Processing | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		47.4		56.4
Midstream services, Processing | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, NGL services
Segment Reporting
Revenue from contracts with customers		10.3		26.9
Midstream services, NGL services | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, NGL services | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, NGL services | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		10.3		26.9
Midstream services, NGL services | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, NGL services | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Crude services
Segment Reporting
Revenue from contracts with customers		15.0		27.9
Midstream services, Crude services | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Crude services | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Crude services | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Crude services | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		(0.1)		0.0
Midstream services, Crude services | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		15.1		27.9
Midstream services, Other services
Segment Reporting
Revenue from contracts with customers		2.4		4.5
Midstream services, Other services | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Other services | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		2.2		4.0
Midstream services, Other services | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.2		0.4
Midstream services, Other services | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Other services | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.1
Midstream services—related parties
Segment Reporting
Revenue from contracts with customers		175.2	173.6	341.4	332.6
Midstream services—related parties | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	(33.6)	0.0	(61.4)
Midstream services—related parties | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		108.4	107.2	212.8	212.3
Midstream services—related parties | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0	35.3	0.0	64.3
Midstream services—related parties | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		62.5	59.4	120.0	108.8
Midstream services—related parties | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		4.3	$ 5.3	8.6	$ 8.6
Midstream services, Gathering and transportation, related party
Segment Reporting
Revenue from contracts with customers		100.1		187.4
Midstream services, Gathering and transportation, related party | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Gathering and transportation, related party | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		61.4		114.0
Midstream services, Gathering and transportation, related party | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Gathering and transportation, related party | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		38.7		73.4
Midstream services, Gathering and transportation, related party | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Processing, related party
Segment Reporting
Revenue from contracts with customers		69.9		143.6
Midstream services, Processing, related party | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Processing, related party | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		46.8		98.4
Midstream services, Processing, related party | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Processing, related party | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		23.1		45.2
Midstream services, Processing, related party | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Crude services, related party
Segment Reporting
Revenue from contracts with customers		5.0		10.0
Midstream services, Crude services, related party | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Crude services, related party | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Crude services, related party | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Crude services, related party | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.7		1.4
Midstream services, Crude services, related party | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		4.3		8.6
Midstream services, Other services, related party
Segment Reporting
Revenue from contracts with customers		0.2		0.4
Midstream services, Other services, related party | Corporate
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Other services, related party | Texas | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.2		0.4
Midstream services, Other services, related party | Louisiana | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Other services, related party | Oklahoma | Operating Segments
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Other services, related party | Crude and Condensate | Operating Segments
Segment Reporting
Revenue from contracts with customers		$ 0.0		$ 0.0

[1] Includes related party cost of sales of $46.7 million and $50.9 million for the three months ended June 30, 2018 and 2017, respectively, and $80.8 million and $79.6 million for the six months ended June 30, 2018 and 2017, respectively.

XML

Segment Information - Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting [Abstract]
Segment profit	$ 325.7	$ 228.6	$ 596.7	$ 444.1
General and administrative expenses	(30.4)	(31.1)	(57.9)	(67.2)
Gain (loss) on disposition of assets	(1.2)	5.4	(1.3)	0.3
Depreciation and amortization	(145.3)	(142.5)	(283.4)	(270.8)
Impairments	0.0	0.0	0.0	(7.0)
Gain on litigation settlement	0.0	8.5	0.0	26.0
Operating income	$ 148.8	$ 68.9	$ 254.1	$ 125.4

XML

Other Information (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Other Current Assets:
Natural gas and NGLs inventory	$ 60,800,000	$ 30,100,000
Secured term loan receivable from contract restructuring, net of discount of $1.6	17,900,000	0
Secured term loan receivable, discount	1,600,000	0
Prepaid expenses and other	20,400,000	11,100,000
Natural gas and NGLs inventory, prepaid expenses, and other	99,100,000	41,200,000
Other Current Liabilities:
Accrued interest	36,600,000	35,600,000
Accrued wages and benefits, including taxes	18,000,000	30,400,000
Accrued ad valorem taxes	25,900,000	27,800,000
Capital expenditure accruals	41,800,000	48,800,000
Onerous performance obligations	17,900,000	15,200,000
Other	66,200,000	65,100,000
Other current liabilities	$ 206,400,000	$ 222,900,000

XML

Subsequent Event (Details) - USD ($) $ in Millions		6 Months Ended
	Jul. 18, 2018	Jun. 30, 2018
EnLink Midstream Partners, LP
Subsequent Event [Line Items]
Membership interest in the General Partner		0.40%
GIP | Devon Energy Corporation | Subsequent Event
Subsequent Event [Line Items]
Aggregated consideration paid to acquire equity interest	$ 3,125
GIP Stetson | EnLink Midstream Partners GP, LLC | Subsequent Event
Subsequent Event [Line Items]
Membership interest in the General Partner	100.00%
GIP Stetson | EnLink Midstream Partners, LP | Subsequent Event
Subsequent Event [Line Items]
Membership interest in the General Partner	23.10%
GIP Stetson II | ENLC | Subsequent Event
Subsequent Event [Line Items]
Membership interest in the General Partner	63.80%