10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

 _______________________________________

FORM 10-Q

 _______________________________________

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2021

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 No. 1-36413

ENABLE MIDSTREAM PARTNERS, LP

(Exact name of registrant as specified in its charter) 

 _______________________________________

Delaware	72-1252419
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
499 West Sheridan Avenue, Suite 1500 Oklahoma City, Oklahoma	73102
(Address of Principal Executive Offices)	(Zip Code)

(405) 525-7788

Registrant’s telephone number, including area code

_______________________________________

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading symbol(s)	Name of each exchange on which registered
Common Units Representing Limited Partner Interests	ENBL	New York Stock Exchange

Indicate by check mark whether the 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  ☒    No  ☐ 

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted 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 such files).  Yes  ☒   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.

Large accelerated filer	☐	Accelerated Filer	☒
Non-accelerated filer	☐	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 Exchange Act). Yes  ☐     No  ☒

As of April 16, 2021, there were 435,866,139 common units outstanding.

ENABLE MIDSTREAM PARTNERS, LP

FORM 10-Q

TABLE OF CONTENTS

	Page
GLOSSARY OF TERMS	1
FORWARD-LOOKING STATEMENTS	4
Part I - FINANCIAL INFORMATION
Item 1. Financial Statements (Unaudited)
Condensed Consolidated Statements of Income	6
Condensed Consolidated Statements of Comprehensive Income	7
Condensed Consolidated Balance Sheets	8
Condensed Consolidated Statements of Cash Flows	9
Condensed Consolidated Statements of Partners' Equity	10
Notes to Unaudited Condensed Consolidated Financial Statements	11
Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations	30
Item 3. Quantitative and Qualitative Disclosures About Market Risk	43
Item 4. Controls and Procedures	44
Part II - OTHER INFORMATION
Item 1. Legal Proceedings	45
Item 1A. Risk Factors	45
Item 6. Exhibits	45
Signature	47

AVAILABLE INFORMATION

Our website is www.enablemidstream.com. On the investor relations tab of our website, http://investors.enablemidstream.com, we make available free of charge a variety of information to investors. Our goal is to maintain the investor relations tab of our website as a portal through which investors can easily find or navigate to pertinent information about us, including but not limited to:

•our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and any amendments to those reports as soon as reasonably practicable after we electronically file that material with or furnish it to the SEC;

•press releases on quarterly distributions, quarterly earnings, and other developments;

•governance information, including our governance guidelines, committee charters, and code of ethics and business conduct;

•information on events and presentations, including an archive of available calls, webcasts, and presentations;

•news and other announcements that we may post from time to time that investors may find useful or interesting; and

•opportunities to sign up for email alerts and RSS feeds to have information pushed in real time.

Information contained on our website or any other website is not incorporated by reference into this report and does not constitute a part of this report.

i

GLOSSARY OF TERMS

Measurements
Bbl.	Barrel. 42 U.S. gallons of petroleum products.
Bbl/d.	Barrels per day.
Bcf.	Billion cubic feet.
Bcf/d.	Billion cubic feet per day.
Btu.	British thermal unit. When used in terms of volume, Btu refers to the amount of natural gas required to raise the temperature of one pound of water by one degree Fahrenheit at one atmospheric pressure.
MBbl.	Thousand barrels.
MBbl/d.	Thousand barrels per day.
MMBtu.	Million British thermal units.
MMcf.	Million cubic feet of natural gas.
MMcf/d.	Million cubic feet per day.
TBtu.	Trillion British thermal units.
TBtu/d.	Trillion British thermal units per day.
Abbreviations
ASC.	Accounting Standards Codification.
ASU.	Accounting Standards Update.
DCF.	Distributable Cash Flow, a non-GAAP measure calculated as Adjusted EBITDA, as further adjusted for Series A Preferred Unit distributions, distributions for phantom and performance units, Adjusted interest expense, maintenance capital expenditures and current income taxes.
DOT.	Department of Transportation.
EBITDA.	Earnings before interest, taxes, depreciation and amortization.
EGT.	Enable Gas Transmission, LLC, a wholly owned subsidiary of the Partnership that operates an approximately 5,900-mile interstate pipeline that provides natural gas transportation and storage services to customers principally in the Anadarko, Arkoma and Ark-La-Tex Basins in Oklahoma, Texas, Arkansas, Louisiana, Missouri and Kansas.
EOCS.	Enable Oklahoma Crude Services, LLC, formerly Velocity Holdings, LLC, a wholly owned subsidiary of the Partnership that provides crude oil and condensate gathering services to customers in the SCOOP and STACK plays of the Anadarko Basin in Oklahoma.
EOIT.	Enable Oklahoma Intrastate Transmission, LLC, formerly Enogex LLC, a wholly owned subsidiary of the Partnership that operates an approximately 2,200-mile intrastate pipeline that provides natural gas transportation and storage services to customers in Oklahoma.
EPA.	Environmental Protection Agency.
ESCP.	Enable South Central Pipeline, LLC, formerly Velocity Pipeline Partners, LLC, in which the Partnership, through EOCS, owns a 60% joint venture interest in a 26-mile pipeline system with a third party which owns and operates a refinery connected to the EOCS system.
ETGP.	Enable Texola Gathering & Processing, LLC, formerly Align Midstream, LLC, a wholly owned subsidiary of the Partnership that provides natural gas gathering and processing services to customers in the Cotton Valley and Haynesville plays of the Ark-La-Tex Basin in Texas.
FASB.	Financial Accounting Standards Board.
FERC.	Federal Energy Regulatory Commission.
GAAP.	Accounting principles generally accepted in the United States of America.
LDC.	Local distribution company involved in the delivery of natural gas to consumers within a specific geographic area.
LIBOR.	London Interbank Offered Rate.
LNG.	Liquefied natural gas.
MRT.	Enable Mississippi River Transmission, LLC, a wholly owned subsidiary of the Partnership that operates an approximately 1,600-mile interstate pipeline that provides natural gas transportation and storage services principally in Texas, Arkansas, Louisiana, Missouri and Illinois.
NGA.	Natural Gas Act of 1938.
NGL(s).	Natural gas liquid(s), which are the hydrocarbon liquids contained within the natural gas stream including condensate.

1

NYSE.	New York Stock Exchange.
OPEC.	Organization of the Petroleum Exporting Countries.
PHMSA.	Pipeline and Hazardous Materials Safety Administration.
S&P.	Standard & Poor’s Rating Services.
SCOOP.	South Central Oklahoma Oil Province.
SEC.	Securities and Exchange Commission.
SESH.	Southeast Supply Header, LLC, in which the Partnership owns a 50% interest, that operates an approximately 290-mile interstate natural gas pipeline from Perryville, Louisiana to southwestern Alabama near the Gulf Coast.
STACK.	Sooner Trend Anadarko Basin Canadian and Kingfisher Counties.
Terms and Definitions
2019 Term Loan Agreement.	Unsecured term loan agreement dated January 29, 2019, by and among Enable Midstream Partners, LP and Bank of America, N.A., as administrative agent, and the several lenders from time to time party thereto.
2024 Notes.	$600 million aggregate principal amount of the Partnership’s 3.900% senior notes due 2024.
2027 Notes.	$700 million aggregate principal amount of the Partnership’s 4.400% senior notes due 2027.
2028 Notes.	$800 million aggregate principal amount of the Partnership’s 4.950% senior notes due 2028.
2029 Notes.	$550 million aggregate initial principal amount of the Partnership’s 4.150% senior notes due 2029.
2044 Notes.	$550 million aggregate initial principal amount of the Partnership’s 5.000% senior notes due 2044.
Adjusted EBITDA.	A non-GAAP measure calculated as net income attributable to limited partners plus depreciation and amortization expense, interest expense, net of interest income, income tax expense, distributions received from equity method affiliate in excess of equity earnings, non-cash equity-based compensation, change in fair value of derivatives not designated as hedging instruments, certain other non-cash gains and losses (including gains and losses on retirement of assets, sales of assets and write-downs of materials and supplies), gain on extinguishment of debt and impairments, less the noncontrolling interest allocable to Adjusted EBITDA.
Adjusted interest expense.	A non-GAAP measure calculated as interest expense plus interest income, amortization of premium on long-term debt and capitalized interest on expansion capital, less amortization of debt costs and discount on long-term debt.
Annual Report.	Annual Report on Form 10-K for the year ended December 31, 2020.
Atoka.	Atoka Midstream LLC, in which the Partnership owns a 50% interest, which provides gathering and processing services to customers in the Arkoma Basin in Oklahoma.
Board of Directors.	The board of directors of Enable GP, LLC.
CenterPoint Energy.	CenterPoint Energy, Inc., a Texas corporation, and its subsidiaries.
Condensate.	A natural gas liquid with a low vapor pressure, mainly composed of propane, butane, pentane and heavier hydrocarbon fractions.
Corps.	United States Army Corps of Engineers.
Distribution coverage ratio.	A non-GAAP measure calculated as DCF divided by distributions related to common unitholders.
Enable GP.	Enable GP, LLC, the general partner of Enable Midstream Partners, LP.
Enable Midstream Services.	Enable Midstream Services, LLC, a wholly owned subsidiary of Enable Midstream Partners, LP.
EOIT Senior Notes.	$250 million aggregate principal amount of EOIT’s 6.25% senior notes that were repaid in March 2020.
Energy Transfer.	Energy Transfer LP, a Delaware limited partnership.
Exchange Act.	Securities Exchange Act of 1934, as amended.
Gas imbalance.	The difference between the actual amounts of natural gas delivered from or received by a pipeline, as compared to the amounts scheduled to be delivered or received.
General Partner.	Enable GP, LLC, a Delaware limited liability company, the general partner of Enable Midstream Partners, LP.
Gross margin.	A non-GAAP measure calculated as Total revenues minus Cost of natural gas and natural gas liquids, excluding depreciation and amortization.

2

Merger.	The acquisition of the Partnership by Energy Transfer Partners, LP.
Merger Agreement.	An agreement between Energy Transfer and the Partnership in which the Partnership will be acquired by Energy Transfer in an all-equity transaction, including the assumption of debt and other liabilities
Moody’s.	Moody’s Investor Services.
OGE Energy.	OGE Energy Corp., an Oklahoma corporation, and its subsidiaries.
Partnership.	Enable Midstream Partners, LP and its subsidiaries.
Partnership Agreement.	Fifth Amended and Restated Agreement of Limited Partnership of Enable Midstream Partners, LP dated as of November 14, 2017.
Revolving Credit Facility.	$1.75 billion senior unsecured revolving credit facility.
Series A Preferred Units.	10% Series A Fixed-to-Floating Non-Cumulative Redeemable Perpetual Preferred Units representing limited partner interests in the Partnership.

3

FORWARD-LOOKING STATEMENTS

Some of the information in this report may contain forward-looking statements. Forward-looking statements give our current expectations, contain projections of results of operations or of financial condition, or forecasts of future events. Words such as “could,” “will,” “should,” “may,” “assume,” “forecast,” “position,” “predict,” “strategy,” “expect,” “intend,” “plan,” “estimate,” “anticipate,” “believe,” “project,” “budget,” “potential,” or “continue,” and similar expressions are used to identify forward-looking statements. Without limiting the generality of the foregoing, forward-looking statements contained in this report include our expectations of plans, strategies, objectives, growth and anticipated financial and operational performance, including revenue projections, capital expenditures and tax position. In particular, our statements with respect to continuity plans and preparedness measures we have implemented in response to the novel coronavirus (COVID-19) pandemic and its expected impact on our business, operations, earnings and results are forward-looking statements. Forward-looking statements can be affected by assumptions used or by known or unknown risks or uncertainties. Consequently, no forward-looking statements can be guaranteed.

All statements, other than statements of historical fact, included in this Form 10-Q regarding the prospects of our industry, our anticipated financial performance, management’s plans and objectives for future operations, planned capital expenditures, business prospects, outcome of regulatory proceedings, market conditions, the expected merger (the “Merger”) of the Partnership with and into Energy Transfer LP pursuant to the Agreement and Plan of Merger between us and Energy Transfer dated February 16, 2021 (the “Merger Agreement”), and other matters, may constitute forward-looking statements. In addition, a forward-looking statement may include a statement of the assumptions or bases underlying the forward-looking statement. We believe that we have chosen these assumptions or bases in good faith and that they are reasonable. However, when considering these forward-looking statements, you should keep in mind the risk factors and other cautionary statements in our Annual Report. Those risk factors and other factors noted throughout this report and in our Annual Report could cause our actual results to differ materially from those disclosed in any forward-looking statement. You are cautioned not to place undue reliance on any forward-looking statements. You should also understand that it is not possible to predict or identify all such factors and should not consider the following list to be a complete statement of all potential risks and uncertainties. Factors that could cause our actual results to differ materially from the results contemplated by such forward-looking statements include:

•our pending Merger with Energy Transfer and the expected timing of the consummation of the Merger;

•changes in general economic conditions, including the material and adverse consequences of the COVID-19 pandemic and its unfolding impact on the global and national economy;

•competitive conditions in our industry;

•actions taken by our customers and competitors;

•the supply and demand for natural gas, NGLs, crude oil and midstream services;

•the actions of the Organization of Petroleum Exporting Countries (OPEC) and other significant producers and governments;

•our ability to successfully implement our business plan;

•our ability to complete internal growth projects on time and on budget;

•the price and availability of debt and equity financing;

•strategic decisions by CenterPoint Energy and OGE Energy regarding their ownership of us and Enable GP;

•operating hazards and other risks incidental to transporting, storing, gathering and processing natural gas, NGLs, crude oil and midstream products;

•natural disasters, weather-related delays, casualty losses and other matters beyond our control;

•world health events, including the ongoing COVID-19 pandemic and the economic effects of the pandemic;

•interest rates;

•the timing and extent of changes in labor and material prices;

•labor relations;

•large customer defaults;

•changes in the availability and cost of capital;

•changes in tax status;

•the effects of existing and future laws and governmental regulations;

•changes in insurance markets impacting costs and the level and types of coverage available;

•the timing and extent of changes in commodity prices;

•the suspension, reduction or termination of our customers’ obligations under our commercial agreements;

4

•disruptions due to equipment interruption or failure at our facilities, or third-party facilities on which our business is dependent;

•the effects of current or future litigation, including the recent U.S. Supreme Court ruling involving the Muscogee (Creek) Nation reservation in Eastern Oklahoma; and

•other factors set forth in this report and our other filings with the SEC, including our Annual Report.

Forward-looking statements speak only as of the date on which they are made. We expressly disclaim any obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law.

5

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

ENABLE MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	Three Months Ended March 31,
	2021		2020
	(In millions, except per unit data)
Revenues (including revenues from affiliates (Note 13)):
Product sales	$	627	$	288
Service revenues	343		360
Total Revenues	970		648
Cost and Expenses (including expenses from affiliates (Note 13)):
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	519		226
Operation and maintenance	84		102
General and administrative	37		24
Depreciation and amortization	106		104
Impairments of property, plant and equipment and goodwill (Note 7)	—		28
Taxes other than income tax	18		18
Total Cost and Expenses	764		502
Operating Income	206		146
Other Income (Expense):
Interest expense	(42)		(47)
Equity in earnings of equity method affiliate	1		6
Total Other Expense	(41)		(41)
Income Before Income Tax	165		105
Income tax benefit	—		—
Net Income	$	165	$	105
Less: Net income (loss) attributable to noncontrolling interest	1		(7)
Net Income Attributable to Limited Partners	$	164	$	112
Less: Series A Preferred Unit distributions (Note 6)	9		9
Net Income Attributable to Common Units (Note 5)	$	155	$	103
Basic and diluted earnings per unit (Note 5)
Basic	$	0.35	$	0.24
Diluted	$	0.33	$	0.19

See Notes to the Unaudited Condensed Consolidated Financial Statements

6

ENABLE MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended March 31,
	2021		2020
	(In millions)
Net income	$	165	$	105
Other comprehensive income (loss):
Change in fair value of interest rate derivative instruments	—		(6)
Reclassification of interest rate derivative losses to net income	1		—
Other comprehensive income (loss)	1		(6)
Comprehensive income	166		99
Less: Comprehensive income (loss) attributable to noncontrolling interest	1		(7)
Comprehensive income attributable to Limited Partners	$	165	$	106

See Notes to the Unaudited Condensed Consolidated Financial Statements

7

ENABLE MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

	March 31, 2021		December 31, 2020
	(In millions)
Current Assets:
Cash and cash equivalents	$	32	$	3
Accounts receivable, net of allowance for doubtful accounts (Note 1)	284		248
Accounts receivable—affiliated companies	13		15
Inventory	44		42
Gas imbalances	49		42
Other current assets, net of allowance for doubtful accounts (Note 1)	27		31
Total current assets	449		381
Property, Plant and Equipment:
Property, plant and equipment	13,287		13,220
Less: Accumulated depreciation and amortization	2,633		2,555
Property, plant and equipment, net	10,654		10,665
Other Assets:
Intangible assets, net	523		539
Investment in equity method affiliate	73		76
Other	65		68
Total other assets	661		683
Total Assets	$	11,764	$	11,729
Current Liabilities:
Accounts payable	$	158	$	149
Accounts payable—affiliated companies	1		2
Current portion of long-term debt	800		—
Short-term debt	214		250
Taxes accrued	26		34
Gas imbalances	13		19
Other	122		128
Total current liabilities	1,334		582
Other Liabilities:
Accumulated deferred income taxes, net	4		5
Regulatory liabilities	26		25
Other	67		71
Total other liabilities	97		101
Long-Term Debt	3,152		3,951
Commitments and Contingencies (Note 14)
Partners’ Equity:
Series A Preferred Units (14,520,000 issued and outstanding at March 31, 2021 and December 31, 2020)	362		362
Common Units (435,846,766 issued and outstanding at March 31, 2021 and 435,549,892 issued and outstanding at December 31, 2020)	6,798		6,713
Accumulated other comprehensive loss	(5)		(6)
Noncontrolling interest	26		26
Total Partners’ Equity	7,181		7,095
Total Liabilities and Partners’ Equity	$	11,764	$	11,729

See Notes to the Unaudited Condensed Consolidated Financial Statements

8

ENABLE MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Three Months Ended March 31,
	2021		2020
	(In millions)
Cash Flows from Operating Activities:
Net income	$	165	$	105
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	106		104
Impairments of property, plant and equipment and goodwill	—		28
Net loss on sale/retirement of assets	—		1
Equity in earnings of equity method affiliate	(1)		(6)
Return on investment in equity method affiliate	1		6
Equity-based compensation	4		4
Amortization of debt costs and discount	1		—
Changes in other assets and liabilities:
Accounts receivable, net	(36)		52
Accounts receivable—affiliated companies	2		8
Inventory	(2)		3
Gas imbalance assets	(7)		(1)
Other current assets, net	2		(6)
Other assets	2		1
Accounts payable	11		(59)
Accounts payable—affiliated companies	(1)		1
Gas imbalance liabilities	(6)		(2)
Other current liabilities	(14)		(35)
Other liabilities	(4)		(4)
Net cash provided by operating activities	223		200
Cash Flows from Investing Activities:
Capital expenditures	(80)		(54)
Proceeds from sale of assets	1		—
Return of investment in equity method affiliate	3		4
Other, net	1		2
Net cash used in investing activities	(75)		(48)
Cash Flows from Financing Activities:
Decrease in short-term debt	(36)		(45)
Repayment of long-term debt	—		(250)
Proceeds from Revolving Credit Facility	—		340
Repayment of Revolving Credit Facility	—		(40)
Distributions to common unitholders	(72)		(144)
Distributions to preferred unitholders	(9)		(9)
Distributions to non-controlling interests	(1)		(3)
Cash paid for employee equity-based compensation	(1)		(1)
Net cash used in financing activities	(119)		(152)
Net Increase in Cash, Cash Equivalents and Restricted Cash	29		—
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	3		4
Cash, Cash Equivalents and Restricted Cash at End of Period	$	32	$	4

See Notes to the Unaudited Condensed Consolidated Financial Statements

9

ENABLE MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS’ EQUITY

(Unaudited)

	Three Months Ended March 31, 2021
	Series A Preferred Units			Common Units			Accumulated Other Comprehensive Loss		Noncontrolling Interest		Total Partners’ Equity
	Units	Value		Units	Value		Value		Value		Value
	(In millions)
Balance as of December 31, 2020	15	$	362	435	$	6,713	$	(6)	$	26	$	7,095
Net income	—	9		—	155		—		1		165
Other comprehensive income	—	—		—	—		1		—		1
Distributions	—	(9)		—	(72)		—		(1)		(82)
Equity-based compensation, net of units for employee taxes	—	—		1	2		—		—		2
Balance as of March 31, 2021	15	$	362	436	$	6,798	$	(5)	$	26	$	7,181

	Three Months Ended March 31, 2020
	Series A Preferred Units			Common Units			Accumulated Other Comprehensive Loss		Noncontrolling Interest		Total Partners’ Equity
	Units	Value		Units	Value		Value		Value		Value
	(In millions)
Balance as of December 31, 2019	15	$	362	435	$	7,013	$	(3)	$	37	$	7,409
Net income (loss)	—	9		—	103		—		(7)		105
Other comprehensive loss	—	—		—	—		(6)		—		(6)
Distributions	—	(9)		—	(144)		—		(3)		(156)
Equity-based compensation, net of units for employee taxes	—	—		—	3		—		—		3
Impact of adoption of financial instruments-credit losses accounting standard (Note 1)	—	—		—	(3)		—		—		(3)
Balance as of March 31, 2020	15	$	362	435	$	6,972	$	(9)	$	27	$	7,352

See Notes to the Unaudited Condensed Consolidated Financial Statements

10

ENABLE MIDSTREAM PARTNERS, LP

NOTES TO THE UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(1) Summary of Significant Accounting Policies

Organization

Enable Midstream Partners, LP (the Partnership) is a Delaware limited partnership whose assets and operations are organized into two reportable segments: (i) gathering and processing and (ii) transportation and storage. Our gathering and processing segment primarily provides natural gas gathering and processing services to our producer customers and crude oil, condensate and produced water gathering services to our producer and refiner customers. The transportation and storage segment provides interstate and intrastate natural gas pipeline transportation and storage services primarily to our producer, power plant, LDC and industrial end-user customers. Our natural gas gathering and processing assets are primarily located in Oklahoma, Texas, Arkansas and Louisiana and serve natural gas production in the Anadarko, Arkoma and Ark-La-Tex Basins. Crude oil gathering assets are located in Oklahoma and serve crude oil production in the SCOOP and STACK plays of the Anadarko Basin and in North Dakota and serve crude oil production in the Bakken Shale formation of the Williston Basin. The Partnership’s natural gas transportation and storage assets consist primarily of an interstate pipeline system extending from western Oklahoma and the Texas Panhandle to Louisiana, an interstate pipeline system extending from Louisiana to Illinois, an intrastate pipeline system in Oklahoma, and our investment in SESH, a pipeline extending from Louisiana to Alabama.

CenterPoint Energy and OGE Energy each have 50% of the management interests in Enable GP. Enable GP is the general partner of the Partnership and has no other operating activities. Enable GP is governed by a board made up of two representatives designated by each of CenterPoint Energy and OGE Energy, along with the Partnership’s Chief Executive Officer and three independent board members CenterPoint Energy and OGE Energy mutually agreed to appoint. CenterPoint Energy and OGE Energy also own a 40% and 60% interest, respectively, in the incentive distribution rights held by Enable GP.

As of March 31, 2021, CenterPoint Energy held approximately 53.7% or 233,856,623 of the Partnership’s common units, and OGE Energy held approximately 25.5% or 110,982,805 of the Partnership’s common units. Additionally, CenterPoint Energy holds 14,520,000 Series A Preferred Units. The limited partner interests of the Partnership have limited voting rights on matters affecting the business. As such, limited partners do not have rights to elect the Partnership’s general partner on an annual or continuing basis and may not remove Enable GP, its current general partner, without at least a 75% vote by all unitholders, including all units held by the Partnership’s limited partners, and Enable GP and its affiliates, voting together as a single class.

As of March 31, 2021, the Partnership owned a 50% interest in SESH. See Note 8 for further discussion of SESH. For the three months ended March 31, 2021, the Partnership owned a 50% ownership in Atoka and consolidated Atoka in the accompanying Condensed Consolidated Financial Statements as EOIT acted as the managing member of Atoka and had control over the operations of Atoka. In addition, the Partnership held a 60% interest in ESCP, which is consolidated in the accompanying Condensed Consolidated Financial Statements as EOCS acted as the managing member of ESCP and had control over the operations of ESCP.

Merger Agreement

On February 17, 2021, the Partnership and Energy Transfer announced their entry into a Merger Agreement, whereby the Partnership will be acquired by Energy Transfer in an all-equity transaction, including the assumption of debt and other liabilities. Under the terms of the Merger Agreement, which has been unanimously approved by the Boards of Directors of both companies, Partnership common unitholders will receive 0.8595 of an Energy Transfer common unit for each Partnership common unit. Each of the Partnership’s Series A Preferred Units will be exchanged for 0.0265 Series G preferred units of Energy Transfer. The transaction will also include a $10 million cash payment for the Partnership’s general partner.

Generally, the Merger, including the receipt of equity consideration by common unitholders is expected to be treated as a tax-free transaction subject to certain exceptions as described in a Registration Statement on Form S-4 filed by Energy Transfer. The transaction, which is expected to close in mid-2021, is subject to customary closing conditions. CenterPoint Energy and OGE Energy, who collectively own approximately 79% of the outstanding Partnership common units, delivered their consents to the transaction. The Merger Agreement includes certain customary restrictions on the Partnership until closing of the Merger, such as limitations on distributions, equity issuances, and incurring and prepaying indebtedness. If the Merger does not occur, under certain circumstances, the Partnership may be required to pay Energy Transfer a termination fee of $97.5 million. Until the approval by unitholders and subsequent closing, we must continue to operate the Partnership as a stand-alone company.

11

Basis of Presentation

The accompanying Condensed Consolidated Financial Statements and related notes of the Partnership have been prepared pursuant to the rules and regulations of the SEC and GAAP. Pursuant to such rules and regulations, certain disclosures normally included in financial statements prepared in accordance with GAAP have been omitted. The accompanying Condensed Consolidated Financial Statements and related notes should be read in conjunction with the Consolidated Financial Statements and related notes included in our Annual Report.

The Condensed Consolidated Financial Statements and the related notes reflect all normal recurring adjustments that are, in the opinion of management, necessary to present fairly the financial position and results of operations for the respective periods. Amounts reported in the Partnership’s Condensed Consolidated Statements of Income are not necessarily indicative of amounts expected for a full-year period due to the effects of, among other things, (a) seasonal fluctuations in demand for energy and energy services, (b) changes in energy commodity prices, (c) timing of maintenance and other expenditures, (d) acquisitions and dispositions of businesses, assets and other interests, and (e) the impact of the ongoing COVID-19 pandemic and the economic effects of the pandemic which have resulted in a substantial decrease in natural gas, NGLs and crude oil prices.

For a description of the Partnership’s reportable segments, see Note 16.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Sales and Retirements of Assets

On September 23, 2019, the Partnership entered into an agreement to sell its undivided 1/12th interest in the Bistineau Storage Facility in Louisiana for approximately $19 million. On January 27, 2020, FERC approved the sale. The Partnership closed the sale on April 1, 2020. We did not recognize a gain or loss on this transaction.

Depreciation Expense

On March 26, 2020, FERC issued an order approving MRT’s 2018 Rate Case and 2019 Rate Case settlements. As a result of the settlements, the new depreciation rates for MRT have been applied in accordance with the order. The new depreciation rates did not result in a material change in depreciation expense or results of operations.

Accounts Receivable and Allowance for Doubtful Accounts

The Partnership adopted ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” on January 1, 2020. Upon adoption, the Partnership recognized a $3 million cumulative adjustment to Partners’ Equity and a corresponding adjustment to Allowance for doubtful accounts.

Accounts receivable are recorded at the invoiced amount and do not typically bear interest. The determination of the allowance for doubtful accounts requires management to make estimates and judgments regarding our customers’ ability to pay. The allowance for doubtful accounts is determined based primarily upon the historical loss-rate method established for various pools of accounts receivables with similar levels of credit risk. The historical loss-rates are then adjusted, as necessary, based on current conditions and forecast information that could result in future uncollectable amounts. On an ongoing basis, we evaluate our customers’ financial strength and liquidity based on aging of accounts receivable, payment history, and review of other relevant information, including ratings agency credit ratings and alerts, publicly available reports and news releases, and bank and trade references. It is the policy of management to review the outstanding accounts receivable and other receivable balances within other assets at least quarterly, giving consideration to credit losses, the aging of receivables, specific customer circumstances that may impact their ability to pay the amounts due and current and forecast economic conditions over the assets contractual lives. The following table summarizes the required allowance for doubtful accounts.

12

	March 31, 2021		December 31, 2020
	(In millions)
Accounts receivable	$	4	$	1
Other assets	3		3
Total Allowance for doubtful accounts	$	7	$	4

Inventory

Natural gas inventory is held, through the transportation and storage segment, to provide operational support for pipeline deliveries and to manage leased intrastate storage capacity. Natural gas liquids inventory is held, through the gathering and processing segment, due to timing differences between the production of certain natural gas liquids and ultimate sale to third parties. Natural gas and natural gas liquids inventory is valued using moving average cost and is subsequently recorded at the lower of cost or net realizable value. The Partnership recorded write-downs to net realizable value related to natural gas and natural gas liquids inventory of $1 million and $6 million during the three months ended March 31, 2021 and 2020, respectively.

Impairment of Long-Lived Assets (including Intangible Assets)

The Partnership periodically evaluates long-lived assets, including property, plant and equipment, and specifically identifiable intangibles other than goodwill, when events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. The determination of whether an impairment has occurred is based on an estimate of undiscounted cash flows attributable to the assets, as compared to the carrying value of the assets. For more information, see Note 7.

Impairment of Goodwill

The Partnership assesses its goodwill for impairment annually on October 1st, or more frequently if events or changes in circumstances indicate that the carrying value of goodwill may not be recoverable. Goodwill is assessed for impairment by comparing the fair value of the reporting unit with its book value, including goodwill. The Partnership utilizes the market or income approaches to estimate the fair value of the reporting unit, also giving consideration to the alternative cost approach. Under the market approach, historical and current year forecasted cash flows are multiplied by a market multiple to determine fair value. Under the income approach, anticipated cash flows over a period of years plus a terminal value are discounted to present value using appropriate discount rates. The resulting fair value of the reporting unit is then compared to the carrying amount of the reporting unit and an impairment charge is recorded to goodwill for the difference. The Partnership performs its goodwill impairment testing at the reporting unit, which is one level below the transportation and storage and gathering and processing reportable segment level. For more information, see Note 7.

(2) New Accounting Pronouncements

Reference Rate Reform

In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” This standard provides optional guidance, for a limited time, to ease the potential burden in accounting for or recognizing the effects of reference rate reform on financial reporting. The standard was effective upon issuance and generally can be applied through December 31, 2022. The Partnership adopted ASU 2020-04 during the year ended December 31, 2020. The implementation had no material impact on the Consolidated Financial Statements and related disclosures.

In January 2021, the FASB issued ASU No. 2021-01, “Reference Rate Reform (Topic 848): Scope.” This standard clarifies that certain optional expedients and exceptions in ASC 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. ASU 2021-01 also amends the expedients and exceptions in ASC 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition. ASU 2021-01 was effective upon issuance and generally can be applied through December 31, 2022. The Partnership adopted ASU 2021-01 during three months ended March 31, 2021. The implementation had no material impact on the Condensed Consolidated Financial Statements and related disclosures.

13

(3) Revenues

The following tables disaggregate total revenues by major source from contracts with customers and the gain (loss) on derivative activity for the three months ended March 31, 2021 and 2020.

	Three Months Ended March 31, 2021
	Gathering and Processing		Transportation and Storage		Eliminations		Total
	(In millions)
Revenues:
Product sales:
Natural gas	$	112	$	330	$	(130)	$	312
Natural gas liquids	297		3		(3)		297
Condensate	32		—		—		32
Total revenues from natural gas, natural gas liquids, and condensate	441		333		(133)		641
Loss on derivative activity	(13)		(1)		—		(14)
Total Product sales	$	428	$	332	$	(133)	$	627
Service revenues:
Demand revenues	$	26	$	127	$	—	$	153
Volume-dependent revenues	170		23		(3)		190
Total Service revenues	$	196	$	150	$	(3)	$	343
Total Revenues	$	624	$	482	$	(136)	$	970

	Three Months Ended March 31, 2020
	Gathering and Processing		Transportation and Storage		Eliminations		Total
	(In millions)
Revenues:
Product sales:
Natural gas	$	56	$	73	$	(60)	$	69
Natural gas liquids	172		2		(2)		172
Condensate	27		—		—		27
Total revenues from natural gas, natural gas liquids, and condensate	255		75		(62)		268
Gain on derivative activity	20		—		—		20
Total Product sales	$	275	$	75	$	(62)	$	288
Service revenues:
Demand revenues	$	39	$	142	$	—	$	181
Volume-dependent revenues	163		17		(1)		179
Total Service revenues	$	202	$	159	$	(1)	$	360
Total Revenues	$	477	$	234	$	(63)	$	648

MRT Rate Case Settlements

In June 2018, MRT filed a general NGA rate case (the 2018 Rate Case), and in October 2019, MRT filed a second rate case (the 2019 Rate Case). MRT began collecting the rates proposed in the 2018 Rate Case, subject to refund, on January 1, 2019. On March 26, 2020, FERC issued an order approving settlements filed in the 2018 Rate Case and the 2019 Rate Case. Upon issuance of the order and approval of the settlement of the MRT rate cases, the Partnership recognized $17 million of revenues from amounts previously held in reserve related to transportation and storage services performed in 2019. In May 2020, $21 million previously held in reserve was refunded to customers, which is inclusive of interest.

14

Accounts Receivable

The following table summarizes the components of accounts receivable, net of allowance for doubtful accounts.

	March 31, 2021		December 31, 2020
	(In millions)
Accounts Receivable:
Customers	$	272	$	245
Contract assets (1)	21		12
Non-customers	4		6
Total Accounts Receivable (2)	$	297	$	263

____________________

(1)Contract assets reflected in Total Accounts Receivable include accrued minimum volume commitments. Contract assets are primarily attributable to revenues associated with estimated shortfall volumes on certain annual minimum volume commitment arrangements. Total Accounts Receivable does not include contract assets related to firm service transportation contracts with tiered rates of $10 million as of March 31, 2021 and $9 million as of December 31, 2020, which are reflected in Other Assets.

(2)Total Accounts Receivable includes Accounts receivable, net of allowance for doubtful accounts and Accounts receivable—affiliated companies.

Contract Liabilities

Our contract liabilities primarily consist of prepayments received from customers for which the good or service has not yet been provided in connection with the prepayment.

The table below summarizes the change in the contract liabilities.

	March 31, 2021		December 31, 2020
	(In millions)
Deferred revenues, beginning of period (1)	$	44	$	48
Amounts recognized in revenues related to the beginning balance	(17)		(25)
Net additions	16		21
Deferred revenues, end of period (1)	$	43	$	44

____________________

(1)Deferred revenues includes deferred revenue—affiliated companies. This amount is included in Other current liabilities and Other long-term liabilities.

The table below summarizes the timing of recognition of these contract liabilities as of March 31, 2021.

	2021		2022		2023		2024		2025 and After
	(In millions)
Deferred revenues (1)	$	20	$	7	$	7	$	7	$	2

____________________

(1)Deferred revenues includes deferred revenue—affiliated companies. This amount is included in Other current liabilities and Other long-term liabilities.

Remaining Performance Obligations

Our remaining performance obligations consist primarily of firm arrangements and minimum volume commitment arrangements. Upon completion of the performance obligations associated with these arrangements, customers are invoiced and revenue is recognized as Service revenues in the Condensed Consolidated Statements of Income.

15

The table below summarizes the timing of recognition of the remaining performance obligations as of March 31, 2021.

	2021		2022		2023		2024		2025 and After
	(In millions)
Transportation and Storage	$	325	$	393	$	353	$	266	$	959
Gathering and Processing	93		123		121		101		213
Total remaining performance obligations	$	418	$	516	$	474	$	367	$	1,172

(4) Leases

The table below summarizes the operating leases included in the Condensed Consolidated Balance Sheets.

	Balance Sheet Location	March 31, 2021		December 31, 2020
		(In millions)
Operating lease asset	Other Assets	$	24	$	25
Total right-of-use assets		$	24	$	25
Operating lease liabilities	Other Current Liabilities	$	4	$	4
Operating lease liabilities	Other Liabilities	23		24
Total lease liabilities		$	27	$	28

As of March 31, 2021, all lease obligations outstanding were classified as operating leases. Therefore, all cash flows are reflected in Cash Flows from Operating Activities.

The following table presents the Partnership’s rental costs associated with field equipment and buildings.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Rental Costs:
Field equipment	$	3	$	5
Office space	1		1

As of March 31, 2021, the weighted average remaining lease term is 6.5 years and the weighted average discount rate is 5.49%.

The following table presents the Partnership’s lease cost.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Lease Cost:
Operating lease cost	$	1	$	2
Short-term lease cost	2		3
Variable lease cost	1		1
Total Lease Cost	$	4	$	6

The Partnership recorded no short-term lease costs in the transportation and storage reportable segment during the three months ended March 31, 2021 and 2020. All lease costs were included in the gathering and processing reportable segment.

16

Under ASC 842, as of March 31, 2021, the Partnership has operating lease obligations expiring at various dates. Undiscounted cash flows for operating lease liabilities are as follows:

	Non-cancellable operating leases
	(In millions)
Year Ending December 31,
2021 - remainder	$	4
2022	5
2023	6
2024	4
2025	3
2026	2
After 2026	6
Total	30
Less: impact of the applicable discount rate	3
Total lease liabilities	$	27

(5) Earnings Per Limited Partner Unit

The following table illustrates the Partnership’s calculation of earnings per unit for common units.

	Three Months Ended March 31,
	2021		2020
	(In millions, except per unit data)
Net income	$	165	$	105
Net income (loss) attributable to noncontrolling interest	1		(7)
Series A Preferred Unit distributions	9		9
Net income available to common units	$	155	$	103
Net income allocable to common units	$	155	$	103
Dilutive effect of Series A Preferred Unit distributions	9		9
Diluted net income allocable to common units	$	164	$	112
Basic weighted average number of common units outstanding (1)	438		437
Dilutive effect of Series A Preferred Units	57		144
Dilutive effect of performance units (2)	—		—
Diluted weighted average number of common units outstanding	495		581
Basic and diluted earnings per unit
Basic	$	0.35	$	0.24
Diluted	$	0.33	$	0.19

____________________

(1)Basic weighted average number of outstanding common units includes approximately two million time-based phantom units for each of the three months ended March 31, 2021 and 2020.

(2)The dilutive effect of the performance unit awards was less than $0.01 per unit during the three months ended March 31, 2021 and 2020.

17

(6) Partners’ Equity

The Partnership Agreement requires that, within 60 days after the end of each quarter, the Partnership distribute all of its available cash (as defined in the Partnership Agreement) to unitholders of record on the applicable record date.

The Partnership paid or has authorized payment of the following cash distributions to common unitholders, as applicable, during 2021 and 2020 (in millions, except for per unit amounts):

Three Months Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2021(1)	May 13, 2021	May 25, 2021	$	0.16525	$	72
December 31, 2020	February 22, 2021	March 1, 2021	0.16525		72
September 30, 2020	November 17, 2020	November 24, 2020	0.16525		72
June 30, 2020	August 18, 2020	August 25, 2020	0.16525		72
March 31, 2020	May 19, 2020	May 27, 2020	0.16525		72

_____________________

(1)The Board of Directors declared a $0.16525 per common unit cash distribution on April 26, 2021, to be paid on May 25, 2021 to common unitholders of record at the close of business on May 13, 2021.

Holders of the Series A Preferred Units receive a quarterly cash distribution on a non-cumulative basis if and when declared by the General Partner, and subject to certain adjustments, equal to an annual rate of 10% on the stated liquidation preference of $25.00 from the date of original issue, February 18, 2016, to, but not including, the five-year anniversary of the original issue date, February 18, 2021. Thereafter, the holders receive a quarterly cash distribution based on a percentage of the stated liquidation preference equal to the sum of the three-month LIBOR plus 8.5%, which was 8.7375% for the relevant days in the three months ended March 31, 2021.

The Partnership paid or has authorized payment of the following cash distributions to holders of the Series A Preferred Units during 2021 and 2020 (in millions, except for per unit amounts):

Three Months Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2021(1)	April 26, 2021	May 14, 2021	$	0.5873	$	9
December 31, 2020	February 12, 2021	February 12, 2021	0.625		9
September 30, 2020	November 3, 2020	November 13, 2020	0.625		9
June 30, 2020	August 4, 2020	August 14, 2020	0.625		9
March 31, 2020	May 5, 2020	May 15, 2020	0.625		9

_____________________

(1)The Board of Directors declared a $0.5873 per Series A Preferred Unit cash distribution on April 26, 2021, to be paid on May 14, 2021, to Series A Preferred unitholders of record at the close of business on April 26, 2021.

(7) Impairments of Property, Plant and Equipment and Goodwill

Impairment of Property, Plant and Equipment

The Partnership periodically evaluates property, plant and equipment for impairment when events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. The determination of whether an impairment has occurred is based on an estimate of undiscounted cash flows attributable to the assets, as compared to the carrying value of the assets. Due to decreases in natural gas and NGL market prices during 2020 as a result of the ongoing COVID-19 pandemic and the economic effects of the pandemic, together with the dispute over crude oil production levels between Russia and members of OPEC led by Saudi Arabia, as of March 31, 2020, management reassessed the carrying value of the Atoka assets, in which the Partnership owns a 50% interest in the consolidated joint venture, which is a component of the gathering and processing segment. Based on forecasted future undiscounted cash flows, management determined that the carrying value of the Atoka assets were not fully recoverable. The Partnership utilized the income approach (generally accepted valuation approach) to estimate the fair value of these assets. The primary inputs were forecasted cash flows and the discount rate. The fair value measurement is based on inputs that are not observable in the market and thus represent Level 3 inputs. Applying a discounted cash flow model to the property, plant and equipment, the Partnership recognized a $16 million impairment, which is included in Impairments of property, plant and equipment and goodwill on the Condensed Consolidated Statements of Income during the three months ended March 31, 2020.

18

Impairment of Goodwill

In the fourth quarter of 2017, as a result of the acquisition of ETGP, the Partnership recorded $12 million of goodwill associated with the Ark-La-Tex Basin reporting unit, included in the gathering and processing reportable segment.

The Partnership tests its goodwill for impairment annually on October 1st, or more frequently if events or changes in circumstances indicate that the carrying value of goodwill may not be recoverable. Goodwill is assessed for impairment by comparing the fair value of the reporting unit with its book value, including goodwill. During 2020, the commodity price declines due to the existing oversupply of crude oil, NGLs and natural gas were exacerbated by the ongoing COVID-19 pandemic and the economic effects of the pandemic, in addition to the dispute over crude oil production levels between Russia and members of OPEC led by Saudi Arabia in the first quarter. Despite the subsequent agreement in April 2020 by a coalition of nations including Russia and Saudi Arabia to reduce production of crude oil, the price of NGLs and crude oil had remained significantly lower than pre-pandemic levels. Amid such crude oil, NGL and natural gas price declines, producers had been cutting back spending and shifting their focus from emphasizing reserves growth, to increasing net cash flows and reducing outstanding debt, which consequently resulted in a decrease in rig count and in forecasted producer activity in the Ark-La-Tex Basin reporting unit during the first quarter of 2020. At the same time, unit prices and market multiples for midstream companies with gathering and processing operations had dropped to their lowest levels in the last three years. Due to the continuing decrease in forward commodity prices, the reduction in forecasted producer activities, the resulting decrease in our forecasted cash flows and the increase in the weighted average cost of capital, the Partnership determined that the fair value of the goodwill associated with our Ark-La-Tex Basin reporting unit would more likely than not be impaired. As a result, the Partnership performed a quantitative test for our goodwill and determined that the carrying value of the Ark-La-Tex Basin reporting unit exceeded its fair value and that goodwill associated with the Ark-La-Tex Basin was completely impaired in the amount of $12 million. The impairment is included in Impairments of property, plant and equipment and goodwill on the Condensed Consolidated Statements of Income for the three months ended March 31, 2020. The Partnership had no goodwill recorded as of March 31, 2021 and December 31, 2020.

(8) Investment in Equity Method Affiliate

The Partnership uses the equity method of accounting for investments in entities in which it has an ownership interest between 20% and 50% and exercises significant influence.

SESH is owned 50% by Enbridge, Inc. and 50% by the Partnership. Pursuant to the terms of the SESH LLC Agreement, if, at any time, CenterPoint Energy has a right to receive less than 50% of our distributions through its interest in the Partnership and its economic interest in Enable GP, or does not have the ability to exercise certain control rights, Enbridge, Inc. may, under certain circumstances, have the right to purchase the Partnership’s interest in SESH at fair market value, subject to certain exceptions.

The Partnership shares operations of SESH with Enbridge, Inc. under service agreements. The Partnership is responsible for the field operations of SESH. SESH reimburses each party for actual costs incurred, which are billed based upon a combination of direct charges and allocations. The Partnership billed SESH $2 million and $6 million during the three months ended March 31, 2021 and 2020, respectively, associated with these service agreements.

The Partnership includes equity in earnings of equity method affiliate, net under the Other Income (Expense) caption in the Condensed Consolidated Statements of Income. The following table presents the amount of Equity in earnings of equity method affiliate recognized and Distributions from equity method affiliate received.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Equity in earnings of equity method affiliate	$	1	$	6
Distributions from equity method affiliate (1)	4		10

___________________

(1)Distributions from equity method affiliate includes a $1 million and $6 million return on investment and a $3 million and $4 million return of investment for the three months ended March 31, 2021 and 2020, respectively.

19

The following table includes the summarized financial information of SESH.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Income Statements:
Revenues	$	15	$	27
Operating income	4		16
Net income (loss)	(1)		11

(9) Debt

The following table presents the Partnership’s outstanding debt.

	March 31, 2021						December 31, 2020
	Outstanding Principal		Discount (1)		Total Debt		Outstanding Principal		Discount (1)		Total Debt
	(In millions)
Commercial Paper	$	214	$	—	$	214	$	250	$	—	$	250
2019 Term Loan Agreement	800		—		800		800		—		800
2024 Notes	600		—		600		600		—		600
2027 Notes	700		(2)		698		700		(2)		698
2028 Notes	800		(4)		796		800		(5)		795
2029 Notes	547		(1)		546		547		(1)		546
2044 Notes	531		—		531		531		—		531
Total debt	$	4,192	$	(7)	$	4,185	$	4,228	$	(8)	$	4,220
Less: Short-term debt (2)					214						250
Less: Current portion of long-term debt (3)					800						—
Less: Unamortized debt expense (4)					19						19
Total long-term debt					$	3,152					$	3,951

____________________

(1)Unamortized discount on long-term debt is amortized over the life of the respective debt.

(2)Short-term debt includes $214 million and $250 million of outstanding commercial paper as of March 31, 2021 and December 31, 2020, respectively.

(3)As of March 31, 2021, Current portion of long-term debt included $800 million outstanding balance of the 2019 Term Loan Agreement.

(4)As of both March 31, 2021 and December 31, 2020, there was an additional $3 million of unamortized debt expense related to the Revolving Credit Facility included in Other assets, not included above.

Commercial Paper

The Partnership has a commercial paper program, pursuant to which the Partnership is authorized to issue up to $1.4 billion of commercial paper. The commercial paper program is supported by our Revolving Credit Facility, and outstanding commercial paper effectively reduces our borrowing capacity thereunder. There were $214 million and $250 million outstanding under our commercial paper program at March 31, 2021 and December 31, 2020, respectively. As of March 31, 2021, the weighted average interest rate for the outstanding commercial paper was 0.73%.

Revolving Credit Facility

The Partnership’s Revolving Credit Facility is a $1.75 billion, five-year senior unsecured revolving credit facility, which under certain circumstances may be increased from time to time up to an additional $875 million. The Revolving Credit Facility is scheduled to mature on April 6, 2023, subject to an extension option, which could be exercised two times to extend the term of the Revolving Credit Facility, in each case, for an additional one-year term. As of March 31, 2021, there were no principal advances, $3 million letters of credit outstanding and our available borrowing capacity was approximately $980 million under our Revolving Credit Facility.

20

The Revolving Credit Facility provides that outstanding borrowings bear interest at the LIBOR and/or an alternate base rate, at the Partnership’s election, plus an applicable margin. The applicable margin is based on the Partnership’s designated credit ratings from S&P, Moody’s and Fitch Ratings. As of March 31, 2021, the applicable margin for LIBOR-based borrowings under the Revolving Credit Facility was 1.50% based on the Partnership’s credit ratings. In addition, the Revolving Credit Facility requires the Partnership to pay a fee on unused commitments. The commitment fee is based on the Partnership’s credit ratings. As of March 31, 2021, the commitment fee under the restated Revolving Credit Facility was 0.20% per annum based on the Partnership’s credit ratings. The commitment fee is recorded as interest expense in the Partnership’s Condensed Consolidated Statements of Income.

2019 Term Loan Agreement

On January 29, 2019, the Partnership entered into an unsecured term loan agreement with Bank of America, N.A., as administrative agent, and the several lenders thereto. As of March 31, 2021, there was $800 million outstanding under the 2019 Term Loan Agreement. The 2019 Term Loan Agreement has a scheduled maturity date of January 29, 2022, but contains an option, which may be exercised up to two times, to extend the maturity date for an additional one-year term. The 2019 Term Loan Agreement provides that outstanding borrowings bear interest at the eurodollar rate and/or an alternate base rate, at the Partnership’s election, plus an applicable margin. The applicable margin is based on the Partnership’s credit ratings. The applicable margin shall equal, (1) in the case of interest rates determined by reference to the eurodollar rate, between 0.75% and 1.50% per annum and (2) in the case of interest rates determined by reference to the alternate base rate, between 0% and 0.50% per annum. As of March 31, 2021, the applicable margin for LIBOR-based advances under the 2019 Term Loan Facility was 1.25% based on the Partnership’s credit ratings. As of March 31, 2021, the weighted average interest rate of the 2019 Term Loan Agreement was 2.08%, including the impact of the associated interest rate derivatives designated as hedging instruments for accounting purposes.

Senior Notes

As of March 31, 2021, the Partnership’s debt included the 2024 Notes, 2027 Notes, 2028 Notes, 2029 Notes and 2044 Notes, which had $7 million of unamortized discount and $19 million of unamortized debt expense at March 31, 2021, resulting in effective interest rates of 4.01%, 4.56%, 5.19%, 4.30% and 5.08%, respectively, during the three months ended March 31, 2021. In March 2020, the Partnership’s EOIT Senior Notes matured and were paid using proceeds from the Revolving Credit Facility.

As of March 31, 2021, the Partnership was in compliance with all of its debt agreements, including financial covenants.

(10) Derivative Instruments and Hedging Activities

The primary risks managed using derivative instruments are commodity price and interest rate risks.

Derivatives Not Designated as Hedging Instruments

Derivative instruments not designated as hedging instruments for accounting purposes are utilized to manage the Partnership’s exposure to commodity price risk. For derivative instruments not designated as hedging instruments, the gain or loss on the derivative is recognized currently in earnings.

21

Quantitative Disclosures Related to Derivative Instruments Not Designated as Hedging Instruments

The following table presents the Partnership’s derivative instruments that were not designated as hedging instruments for accounting purposes.

	March 31, 2021		December 31, 2020
	Gross Notional Volume
	Purchases	Sales	Purchases	Sales
Natural gas— TBtu (1)
Financial fixed futures/swaps	1	17	—	18
Financial basis futures/swaps	1	34	—	27
Financial swaptions (2)	—	5	—	7
Crude oil (for condensate)— MBbl (3)
Financial futures/swaps	—	420	—	465
Financial swaptions (2)	—	150	—	90
Natural gas liquids— MBbl (4)
Financial futures/swaps	435	1,155	855	1,210
Financial options	—	30	—	45

____________________

(1)As of March 31, 2021, 99.2% of the natural gas contracts had durations of one year or less and 0.8% had durations of more than one year and less than two years. As of December 31, 2020, 95.7% of the natural gas contracts had durations of one year or less and 4.3% had durations of more than one year and less than two years.

(2)The notional volume contains a combined derivative instrument consisting of a fixed price swap and a sold option, which gives the counterparties the right, but not the obligation, to increase the notional volume hedged under the fixed price swap until the option expiration date. The notional volume represents the volume prior to option exercise.

(3)As of March 31, 2021, 89.5% of the crude oil (for condensate) contracts had durations of one year or less and 10.5% had durations of more than one year and less than two years. As of December 31, 2020, 100.0% of the crude oil (for condensate) contracts had durations of one year or less.

(4)As of March 31, 2021, 97.2% of the natural gas liquids contracts had durations of one year or less and 2.8% had durations of more than one year and less than two years. As of December 31, 2020, 100.0% of the natural gas liquids contracts had durations of one year or less.

Derivatives Designated as Hedging Instruments

Derivative instruments designated as hedging instruments for accounting purposes are utilized in managing the Partnership’s interest rate risk exposures.

Quantitative Disclosures Related to Derivative Instruments Designated as Hedging Instruments

The following table presents the Partnership’s derivative instruments that were designated as hedging instruments for accounting purposes.

	March 31, 2021		December 31, 2020
	Gross Notional Value
	(In millions)
Interest rate swaps	$	300	$	300

22

Balance Sheet Presentation Related to Derivative Instruments

The following table presents the fair value of the derivative instruments that are included in the Partnership’s Condensed Consolidated Balance Sheets that were not designated as hedging instruments for accounting purposes.

		March 31, 2021				December 31, 2020
		Fair Value
Instrument	Balance Sheet Location	Assets		Liabilities		Assets		Liabilities
		(In millions)
Natural gas
Financial futures/swaps	Other Current	$	1	$	3	$	2	$	2
Financial swaptions	Other Current	1		2		1		2
Crude oil (for condensate)
Financial futures/swaps	Other Current	—		10		1		13
Financial swaptions	Other Current	—		1		—		—
Natural gas liquids
Financial futures/swaps	Other Current	9		6		15		3
Financial swaptions	Other Current	—		1		—		1
Total gross commodity derivatives (1)		$	11	$	23	$	19	$	21

_____________________

(1)See Note 11 for a reconciliation of the Partnership’s commodity derivatives fair value to the Partnership’s Condensed Consolidated Balance Sheets as of March 31, 2021 and December 31, 2020.

The following table presents the fair value of the derivative instruments that are included in the Partnership’s Condensed Consolidated Balance Sheets that were designated as hedging instruments for accounting purposes.

		March 31, 2021				December 31, 2020
		Fair Value
Instrument	Balance Sheet Location	Assets		Liabilities		Assets		Liabilities
		(In millions)
Interest rate swaps (1)	Other Current	$	—	$	5	$	—	$	6

_____________________

(1)All interest rate derivative instruments that were designated as cash flow hedges are considered Level 2 as of March 31, 2021 and December 31, 2020.

Income Statement Presentation Related to Derivative Instruments

The following table presents the effect of derivative instruments on the Partnership’s Condensed Consolidated Statements of Income.

	Amounts Recognized in Income
	Three Months Ended March 31,
	2021		2020
	(In millions)
Natural gas
Financial futures/swaps gains (losses)	$	(2)	$	4
Financial swaptions losses	—		(1)
Physical purchases/sales gains	—		1
Crude oil (for condensate)
Financial futures/swaps gains (losses)	(6)		19
Financial swaptions gains (losses)	(1)		4
Natural gas liquids
Financial futures/swaps losses	(5)		(7)
Total	$	(14)	$	20

23

For derivatives not designated as hedges in the tables above, amounts recognized in income for the periods ended March 31, 2021 and 2020, if any, are reported in Product sales.

The following table presents the components of gain (loss) on derivative activity in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Change in fair value of commodity derivatives	$	(10)	$	10
Realized gain (loss) on commodity derivatives	(4)		10
Gain (loss) on commodity derivative activity	$	(14)	$	20

The following table presents the effect of derivative instruments that were designated as hedging instruments on the Partnership’s Condensed Consolidated Statements of Income.

	Amounts Recognized in Income
	Three Months Ended March 31,
	2021		2020
	(In millions)
Interest rate swaps losses	$	(1)	$	—

Interest rate derivatives designated as hedges are recognized in income once settled. Settlement amounts recognized in income for the periods ended March 31, 2021 and 2020 are reported in Interest expense.

Credit-Risk Related Contingent Features in Derivative Instruments

In the event Moody’s or S&P were to lower the Partnership’s senior unsecured debt rating to a below investment grade rating, the Partnership could be required to provide additional credit assurances to third parties, which could include letters of credit or cash collateral to satisfy its obligation under its financial and physical contracts relating to derivative instruments that are in a net liability position. As of March 31, 2021, under these obligations, the Partnership had posted no cash collateral related to natural gas swaps and swaptions, crude oil swaps and swaptions and NGL swaps and $1 million of additional collateral would be required to be posted by the Partnership in the event of a credit ratings downgrade to a below investment grade rating. In certain situations where the Partnership’s credit rating is lowered by Moody’s or S&P, the Partnership could be subject to an early termination event related to certain derivative instruments, which could result in a cash settlement of the instruments at market values on the date of such early termination.

(11) Fair Value Measurements

Certain assets and liabilities are recorded at fair value in the Condensed Consolidated Balance Sheets and are categorized based upon the level of judgment associated with the inputs used to measure their value. The Partnership determines the appropriate level for each financial asset and liability on a quarterly basis and recognizes transfers between levels at the end of the reporting period. For the three months ended March 31, 2021, there were no transfers between levels. As of March 31, 2021, there were no contracts classified as Level 3.

Estimated Fair Value of Financial Instruments

The fair values of all accounts receivable, notes receivable, accounts payable, commercial paper and other such financial instruments on the Condensed Consolidated Balance Sheets are estimated to be approximately equivalent to their carrying amounts due to their short-term nature and have been excluded from the table below.

24

The following table summarizes the fair value and carrying amount of the Partnership’s financial instruments.

	March 31, 2021				December 31, 2020
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(In millions)
Debt
Revolving Credit Facility (Level 2) (1)	$	—	$	—	$	—	$	—
2019 Term Loan Agreement (Level 2)	800		800		800		800
2024 Notes (Level 2)	600		639		600		612
2027 Notes (Level 2)	698		758		698		709
2028 Notes (Level 2)	796		884		795		817
2029 Notes (Level 2)	546		568		546		544
2044 Notes (Level 2)	531		527		531		499

____________________

(1)    Borrowing capacity is effectively reduced by our borrowings outstanding under the commercial paper program. $214 million and $250 million of commercial paper was outstanding as of March 31, 2021 and December 31, 2020, respectively.

The fair value of the Partnership’s Revolving Credit Facility, 2019 Term Loan Agreement, 2024 Notes, 2027 Notes, 2028 Notes, 2029 Notes, and 2044 Notes is based on quoted market prices and estimates of current rates available for similar issues with similar maturities and is classified as Level 2 in the fair value hierarchy.

Non-Financial Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Certain assets and liabilities are measured at fair value on a nonrecurring basis; that is, the assets and liabilities are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (e.g., when there is evidence of impairment). As of March 31, 2021, no material fair value adjustments or fair value measurements were required for these non-financial assets or liabilities.

Based upon review of forecast undiscounted cash flows as of March 31, 2021, all of the asset groups were considered recoverable. Based upon review for other than temporary declines in fair value, the investment in equity method affiliate was considered recoverable. Future price declines, throughput declines, contracted capacity declines, cost increases, regulatory or political environment changes and other changes in market conditions, including the oversupply of crude oil, NGLs and natural gas as well as the ongoing COVID-19 pandemic and the economic effects of the pandemic, could reduce forecast undiscounted cash flows for the asset groups and result in other than temporary declines in the fair value of the investment in equity method affiliate.

Contracts with Master Netting Arrangements

As of March 31, 2021, the Partnership’s Level 2 interest rate derivatives are recorded as liabilities with no netting adjustments.

The following tables summarize the Partnership’s other assets and liabilities that are measured at fair value on a recurring basis. 

March 31, 2021	Commodity Contracts				Gas Imbalances (1)
	Assets		Liabilities		Assets (2)		Liabilities (3)
	(In millions)
Quoted market prices in active market for identical assets (Level 1)	$	1	$	10	$	—	$	—
Significant other observable inputs (Level 2)	10		13		30		10
Total fair value	11		23		30		10
Netting adjustments	(11)		(11)		—		—
Total	$	—	$	12	$	30	$	10

25

December 31, 2020	Commodity Contracts				Gas Imbalances (1)
	Assets		Liabilities		Assets (2)		Liabilities (3)
	(In millions)
Quoted market prices in active market for identical assets (Level 1)	$	2	$	14	$	—	$	—
Significant other observable inputs (Level 2)	17		7		23		16
Total fair value	19		21		23		16
Netting adjustments	(19)		(19)		—		—
Total	$	—	$	2	$	23	$	16

______________________

(1)The Partnership uses the market approach to fair value its gas imbalance assets and liabilities at individual, or where appropriate an average of, current market indices applicable to the Partnership’s operations, not to exceed net realizable value. There were no netting adjustments as of March 31, 2021 and December 31, 2020.

(2)Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $19 million and $19 million at March 31, 2021 and December 31, 2020, respectively, which fuel reserves are based on the value of natural gas at the time the imbalance was created, and which are not subject to revaluation at fair market value.

(3)Gas imbalance liabilities exclude fuel reserves for over retained fuel due to shippers of $3 million and $3 million at March 31, 2021 and December 31, 2020, respectively, which fuel reserves are based on the value of natural gas at the time the imbalance was created, and which are not subject to revaluation at fair market value.

(12) Supplemental Disclosure of Cash Flow Information

The following table provides information regarding supplemental cash flow information:

	Three Months Ended March 31,
	2021		2020
	(In millions)
Supplemental Disclosure of Cash Flow Information:
Cash Payments:
Interest, net of capitalized interest	$	32	$	43
Income taxes, net of refunds	(2)		—
Non-cash transactions:
Accounts payable related to capital expenditures	7		8
Lease liabilities related to derecognition of right-of-use assets	—		(4)
Impact of adoption of financial instruments-credit losses accounting standard (Note 1)	—		(3)

(13) Related Party Transactions

The Partnership’s revenues from affiliated companies accounted for 7% and 8% of total revenues during the three months ended March 31, 2021 and 2020, respectively. The following table presents the amounts of revenues from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Gas transportation and storage service revenues — CenterPoint Energy	$	27	$	37
Gas transportation and storage service revenues — OGE Energy	10		9
Natural gas product sales — OGE Energy	31		5
Total revenues — affiliated companies	$	68	$	51

26

The following table presents the amounts of natural gas purchased from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Cost of natural gas purchases — CenterPoint Energy	$	—	$	1
Cost of natural gas purchases — OGE Energy	31		8
Total cost of natural gas purchases — affiliated companies	$	31	$	9

Corporate services and seconded employees

The Partnership receives services and support functions from each of CenterPoint Energy and OGE Energy under services agreements for an initial term that ended on April 30, 2016. The services agreements automatically extend year-to-year at the end of the initial term, unless terminated by the Partnership with at least 90 days’ notice prior to the end of any extension. Additionally, the Partnership may terminate the services agreements at any time with 180 days’ notice, if approved by the Board of Enable GP. The Partnership reimburses CenterPoint Energy and OGE Energy for these services up to annual caps, which for 2021 are both less than $1 million.

As of March 31, 2021, the Partnership had certain employees who are participants under OGE Energy’s defined benefit and retiree medical plans, who will remain seconded to the Partnership, subject to certain termination rights of the Partnership and OGE Energy. The Partnership’s reimbursement of OGE Energy for seconded employee costs arising out of OGE Energy’s defined benefit and retiree medical plans is fixed at actual cost subject to an annual cap of $5 million until secondment is terminated.

The following table presents the amounts charged to the Partnership by affiliates for seconded employees, included primarily in Operation and maintenance and General and administrative expenses in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Seconded Employee Costs — OGE Energy	$	4	$	3

(14) Commitments and Contingencies

The Partnership is involved in legal, environmental, tax and regulatory proceedings before various courts, regulatory commissions and governmental agencies regarding matters arising in the ordinary course of business. Some of these proceedings involve substantial amounts. The Partnership regularly analyzes current information and, as necessary, provides accruals for probable liabilities on the eventual disposition of these matters. The Partnership does not expect the disposition of these matters to have a material adverse effect on its financial condition, results of operations or cash flows.

On January 1, 2017, the Partnership entered into a 10-year gathering and processing agreement, which became effective on July 1, 2018, with an affiliate of Energy Transfer for deliveries to the Godley Plant in Johnson County, Texas. As of March 31, 2021, the Partnership estimates the remaining associated minimum volume commitment fee to be $164 million. Minimum volume commitment fees are expected to be $15 million for the remainder of 2021, $23 million per year from 2022 through 2027 and $11 million in 2028.

On September 13, 2018, the Partnership executed a precedent agreement for the development of the Gulf Run Pipeline, an interstate natural gas transportation project. On January 30, 2019, a final investment decision was made by Golden Pass LNG, the cornerstone shipper for the liquefied natural gas facility to be served by the Gulf Run Pipeline project. Subject to approval of the project by FERC, the Partnership will be required to construct a large-diameter pipeline from northern Louisiana to Gulf Coast markets. In addition, the Partnership requested approval to transfer existing EGT transportation infrastructure to the Gulf Run Pipeline. The Partnership filed applications with FERC to obtain authorization to construct and operate the pipeline on February 28, 2020. FERC issued the environmental assessment on October 29, 2020. The Partnership estimates the cost to complete the Gulf Run Pipeline project would be as much as $540 million. The project is backed by a 20-year firm transportation service agreement. The Gulf Run Pipeline connects natural gas producing regions in the U.S., including the

27

Haynesville, Marcellus, Utica and Barnett shales and the Mid-Continent region. The project is expected to be placed into service in late 2022.

(15) Equity-Based Compensation

The following table summarizes the Partnership’s equity-based compensation expense related to performance units and phantom units for the Partnership’s employees and independent directors.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Performance units	$	2	$	2
Phantom units	2		2
Total compensation expense	$	4	$	4

The following table presents the assumptions related to the performance units granted in 2021.

	2021
Number of units granted	1,453,897
Fair value of units granted	$	10.26
Expected distribution yield	12.90		%
Expected price volatility	100.00		%
Risk-free interest rate	0.27		%
Expected life of units (in years)	3

The following table presents the number of phantom units granted and the grant date fair value related to the phantom units granted in 2021.

	2021
Phantom Units granted	1,356,672
Fair value of phantom units granted	$5.41 - $6.87

Units Outstanding

A summary of the activity for the Partnership’s performance units and phantom units applicable to the Partnership’s employees at March 31, 2021 and changes during 2021 are shown in the following table.

	Performance Units				Phantom Units
	Number of Units		Weighted Average Grant-Date Fair Value, Per Unit		Number of Units		Weighted Average Grant-Date Fair Value, Per Unit
	(In millions, except unit data)
Units outstanding at December 31, 2020	1,765,508		$	13.10	1,790,845		$	10.29
Granted (1)	1,453,897		10.26		1,356,672		6.86
Vested (2)	(389,817)		17.70		(461,824)		13.11
Forfeited	(32,625)		10.00		(94,669)		8.70
Units outstanding at March 31, 2021	2,796,963		$	11.02	2,591,024		$	8.05
Aggregate intrinsic value of units outstanding at March 31, 2021	$	18			$	17

_____________________

(1)Performance units represents the target number of performance units granted. The actual number of performance units earned, if any, is dependent upon performance and may range from 0% to 200% of the target.

(2)Performance units vested as of March 31, 2021 include 389,817 units from the 2018 annual grant, which were approved by the Board of Directors in 2018 and, based on the level of achievement of a performance goal established by the Board of Directors over the performance period of January 1, 2018 through December 31, 2020, no performance units vested.

28

Unrecognized Compensation Cost

The following table summarizes the Partnership’s unrecognized compensation cost for its non-vested performance units and phantom units, and the weighted-average periods over which the compensation cost is expected to be recognized.

	March 31, 2021
	Unrecognized Compensation Cost (In millions)		Weighted Average Period for Recognition (In years)
Performance Units	$	21	2.25
Phantom Units	14		2.07
Total	$	35

As of March 31, 2021, there were 3,105,706 units available for issuance under the long-term incentive plan.

(16) Reportable Segments

The Partnership’s determination of reportable segments considers the strategic operating units under which it manages sales, allocates resources and assesses performance of various products and services to customers in differing regulatory environments. The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies excerpt in the Partnership’s audited 2020 Notes to Consolidated Financial Statements included in the Annual Report. The Partnership uses operating income as the measure of profit or loss for its reportable segments.

The Partnership’s assets and operations are organized into two reportable segments: (i) gathering and processing and (ii) transportation and storage. Our gathering and processing segment primarily provides natural gas gathering and processing services to our producer customers and crude oil, condensate and produced water gathering services to our producer and refiner customers. The transportation and storage segment provides interstate and intrastate natural gas pipeline transportation and storage services primarily to our producer, power plant, LDC and industrial end-user customers.

29

Financial data for reportable segments are as follows:

Three Months Ended March 31, 2021	Gathering and Processing		Transportation (1) and Storage		Eliminations		Total
	(In millions)
Product sales	$	428	$	332	$	(133)	$	627
Service revenues	196		150		(3)		343
Total Revenues	624		482		(136)		970
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	398		257		(136)		519
Operation and maintenance, General and administrative	79		42		—		121
Depreciation and amortization	74		32		—		106
Taxes other than income tax	11		7		—		18
Operating income	$	62	$	144	$	—	$	206
Total Assets	$	10,780	$	5,789	$	(4,805)	$	11,764
Capital expenditures	$	21	$	59	$	—	$	80
Three Months Ended March 31, 2020	Gathering and Processing		Transportation (1) and Storage		Eliminations		Total
	(In millions)
Product sales	$	275	$	75	$	(62)	$	288
Service revenues	202		159		(1)		360
Total Revenues	477		234		(63)		648
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	211		78		(63)		226
Operation and maintenance, General and administrative	81		45		—		126
Depreciation and amortization	74		30		—		104
Impairments of property, plant and equipment and goodwill	28		—		—		28
Taxes other than income tax	11		7		—		18
Operating income	$	72	$	74	$	—	$	146
Total assets as of December 31, 2020	$	10,830	$	5,729	$	(4,830)	$	11,729
Capital expenditures	$	34	$	20	$	—	$	54

_____________________

(1)See Note 8 for discussion regarding ownership interests in SESH and related equity earnings included in the transportation and storage segment for the three months ended March 31, 2021 and 2020.

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

The following discussion and analysis should be read in conjunction with our unaudited Condensed Consolidated Financial Statements and the related notes included herein and our audited Consolidated Financial Statements for the year ended December 31, 2020, included in our Annual Report. The following discussion contains forward-looking statements that reflect our future plans, estimates, beliefs and expected performance. The forward-looking statements are dependent upon events, risks and uncertainties that may be outside our control, including risks resulting from the ongoing COVID-19 pandemic and the economic effects of the pandemic. Our actual results could differ materially from those discussed in these forward-looking statements. Please read “Forward-Looking Statements.” In light of these risks, uncertainties and assumptions, the forward-looking events discussed may not occur.

30

Overview

Enable Midstream Partners, LP owns, operates and develops midstream energy infrastructure assets strategically located to serve our customers. We are traded on the NYSE under the symbol “ENBL.” Our general partner is owned by CenterPoint Energy and OGE Energy. In this report, the terms “Partnership” and “Registrant” as well as the terms “our,” “we,” “us” and “its,” are sometimes used as abbreviated references to Enable Midstream Partners, LP together with its consolidated subsidiaries.

Our assets and operations are organized into two reportable segments: (i) gathering and processing and (ii) transportation and storage. Our gathering and processing segment primarily provides natural gas and crude oil gathering and natural gas processing services to our producer customers and crude oil, condensate and produced water gathering services to our producer and refiner customers. Our transportation and storage segment provides interstate and intrastate natural gas pipeline transportation and storage services primarily to our producer, power plant, LDC and industrial end-user customers.

Our natural gas gathering and processing assets are primarily located in Oklahoma, Texas, Arkansas and Louisiana and serve natural gas production in the Anadarko, Arkoma and Ark-La-Tex Basins. Our crude oil gathering assets are located in Oklahoma and North Dakota and serve crude oil production in the Anadarko and Williston Basins. Our natural gas transportation and storage assets consist primarily of an interstate pipeline system extending from western Oklahoma and the Texas Panhandle to Louisiana, an interstate pipeline system extending from Louisiana to Illinois, an intrastate pipeline system in Oklahoma and our investment in SESH, an interstate pipeline extending from Louisiana to Alabama.

We expect our business to continue to be affected by the key trends included in our Annual Report, as well as the recent developments discussed herein, including the impacts of the COVID-19 pandemic. Our expectations are based on assumptions made by us and information currently available to us. To the extent our underlying assumptions about, or interpretations of, available information prove to be incorrect, our actual results may vary materially from our expected results.

Our primary business objective is to increase the cash available for distribution to our unitholders over time while maintaining our financial flexibility. Our business strategies for achieving this objective include capitalizing on organic growth opportunities associated with our strategically located assets, growing through accretive acquisitions, maintaining strong customer relationships to attract new volumes and expand beyond our existing asset footprint and business lines, and continuing to minimize direct commodity price exposure through fee-based contracts. As part of these efforts, we continuously engage in discussions with new and existing customers regarding potential projects to develop new midstream assets to support their needs as well as discussions with potential counterparties regarding opportunities to purchase or invest in complementary assets in new operating areas or midstream business lines. These growth, acquisition and development efforts often involve assets which, if acquired or constructed, could have a material effect on our financial condition and results of operations.

Liquidity and Capital Resources

The Partnership’s principal liquidity requirements are to finance its operations, fund capital expenditures and acquisitions, make cash distributions and satisfy any indebtedness obligations. We expect that our liquidity and capital resource needs will be met by our sources of liquidity, which as of March 31, 2021, included cash on hand, operating cash flow, proceeds from commercial paper issuances, borrowings under our revolving credit facility, debt issuances and the issuance of equity. For more information on our commercial paper program, our revolving credit agreement, our other outstanding debt agreements and preferred equity, please see Note 6 “Partners’ Equity” and Note 9 “Debt” in the Notes to the Unaudited Condensed Consolidated Financial Statements under Item 1. “Financial Statements.”

Cash on hand and operating cash flow can be subject to fluctuations due to trends and uncertainties that are beyond our control. Likewise, our ability to issue commercial paper, equity and debt and our ability to obtain credit facilities on favorable terms may be impacted by a variety of market factors as well as fluctuations in our results of operations. For more information on conditions impacting our liquidity and capital resources, see “Results of Operations—Trends and Uncertainties Affecting Results of Operations.” For further discussion of risks related to our liquidity and capital resources, see Item 1A. “Risk Factors” in our Annual Report.

Working Capital

Working capital is the difference in our current assets and our current liabilities. Working capital is an indication of liquidity and potential need for short-term funding. The change in our working capital requirements are driven generally by changes in accounts receivable, accounts payable, commodity prices, credit extended to, and the timing of collections from, customers, the level and timing of spending for maintenance and expansion activity, and the timing of debt maturities. As of

31

March 31, 2021, we had a working capital deficit of $885 million. The deficit is primarily due to the classification of $800 million of the 2019 Term Loan Agreement as Current portion of long-term debt as of March 31, 2021 as well as $214 million of commercial paper outstanding as of March 31, 2021. We utilize our commercial paper program and Revolving Credit Facility to manage the timing of cash flows and fund short-term working capital deficits.

Cash Flows

The following tables reflect cash flows for the applicable periods.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Net cash provided by operating activities	$	223	$	200
Net cash used in investing activities	(75)		(48)
Net cash used in financing activities	(119)		(152)

Operating Activities

The increase of $23 million or 12%, in net cash provided by operating activities for the three months ended March 31, 2021 as compared to the three months ended March 31, 2020 was primarily driven by an increase in net income of $60 million, partially offset by a decrease in adjustments for non-cash items of $26 million and a decrease of $11 million in the timing of cash receipts and disbursements and changes in other working capital assets and liabilities.

Investing Activities

The increase of $27 million, or 56%, in net cash used in investing activities for the three months ended March 31, 2021 as compared to the three months ended March 31, 2020 was primarily due to higher capital expenditures of $26 million, a decrease in other investing cash flows of $1 million and a decrease in return of investment in equity method affiliate of $1 million, partially offset by an increase in proceeds from sale of assets of $1 million.

Financing Activities

Net cash used in financing activities decreased $33 million, or 22%, for the three months ended March 31, 2021 as compared to the three months ended March 31, 2020. Our primary financing activities consist of the following:

	Three Months Ended March 31,
	2021		2020
	(In millions)
Decrease in short-term debt	$	(36)	$	(45)
Repayment of EOIT Senior Notes	—		(250)
Net proceeds from Revolving Credit Facility	—		300
Distributions	(82)		(156)
Cash paid for employee equity-based compensation	(1)		(1)

Distributions

On April 26, 2021, the Board of Directors declared a quarterly cash distribution of $0.16525 per common unit on all of the Partnership’s outstanding common units for the period ended March 31, 2021. The distributions will be paid May 25, 2021 to unitholders of record as of the close of business on May 13, 2021. Additionally, the Board of Directors declared a quarterly cash distribution of $0.5873 on the Partnership’s outstanding Series A Preferred Units. The distributions will be paid May 14, 2021 to unitholders of record as of the close of business on April 26, 2021.

Trends Affecting Liquidity and Capital Resources

Borrowing Capacity

Our Revolving Credit Facility and our 2019 Term Loan Agreement each contain a financial covenant limiting our ratio of consolidated funded indebtedness to consolidated earnings before interest, taxes, depreciation and amortization as of the last

32

day of each fiscal quarter of less than or equal to 5.00 to 1.00. As of March 31, 2021, our available borrowing capacity under our Revolving Credit Facility was approximately $980 million due to this financial covenant, prior to invoking any amounts related to Qualified Project EBITDA Adjustments (as defined in the Revolving Credit Facility). However, we believe that we will have sufficient cash flow and borrowing capacity to fully fund our business.

Results of Operations

Trends and Uncertainties Affecting Results of Operations

Energy Transfer Merger

On February 16, 2021, we entered into a definitive Merger Agreement with Energy Transfer, pursuant to which, among other things, all outstanding common units of the Partnership will be acquired by Energy Transfer in an all-equity transaction, including the assumption of debt and other liabilities, subject to the conditions of the Merger Agreement.

Under the terms of the Merger Agreement, our common unitholders will receive 0.8595 of one common unit representing limited partner interests in Energy Transfer for each common unit of the Partnership. In addition, each issued and outstanding Series A Preferred Unit of the Partnership will be exchanged for 0.0265 of an Energy Transfer Series G preferred unit, and Energy Transfer will make a $10 million cash payment to the owners of the Partnership’s general partner for the limited liability company interests in Enable GP. The transaction was approved by the boards of directors of the general partners of both partnerships and the Conflicts Committee of our Board of Directors. The transaction is subject to the receipt of the required approvals from the holders of a majority of our common units, regulatory approvals, and other customary closing conditions.

Pursuant to a consent statement/prospectus dated April 8, 2021, which was included as part of a Registration Statement on Form S-4 filed by Energy Transfer, the Partnership solicited written consents from its common unitholders to approve the Merger Agreement and, on a non-binding, advisory basis, the compensation that will or may become payable to the Partnership’s named executive officers in connection with the transactions contemplated by the Merger Agreement. Pursuant to previously disclosed support agreements, CenterPoint Energy and OGE Energy, who collectively own approximately 79.2% of the Partnership’s common units, delivered written consents approving the Merger Agreement and, on a non-binding, advisory basis, the transaction-related compensation proposal. While the consents of CenterPoint Energy and OGE Energy are sufficient to approve the transaction, the Partnership is requesting that all of its common unitholders approve the Merger and other proposals outlined in the consent statement/prospectus by executing and returning the written consents furnished therewith.

The Merger is anticipated to close in mid-2021, subject to the satisfaction of customary closing conditions, including Hart-Scott-Rodino clearance. We cannot provide any assurance that the combination will be completed on the terms or timeline currently contemplated, or at all. The above is a summary of the material terms of the Merger and is qualified in its entirety by reference to the Registration Statement on Form S-4 (which became effective on April 7, 2021) filed by Energy Transfer.

COVID-19 Pandemic

Throughout the COVID-19 pandemic, our gathering and processing and our transportation and storage assets have continued to operate as critical infrastructure necessary to support the supply of natural gas, NGLs and crude oil. In compliance with Center for Disease Control guidance, we implemented strategies to protect the health and safety of our workers, including virtual symptom screening, social distancing, wearing masks, limiting non-essential travel, and, where possible, utilizing remote working. In April 2021, we began returning additional employees to the workplace who had been working remotely. We will continue to monitor for the resurgence of COVID-19 in our workplaces and in the communities where our employees are located and adjust our strategies accordingly.

Commodity Price Environment

Our business is impacted by commodity prices, which have continued to experience significant volatility. Commodity prices impact the drilling and production of natural gas and crude oil in the areas served by our systems, and the volumes on our systems are impacted by the amount of drilling and production in the areas we serve. Both our gathering and processing segment and our transportation and storage segment can be affected by drilling and production. For more information regarding the impact of commodity prices, drilling and production on the volumes on our systems as well as our exposure to commodity prices under our processing arrangements, see Item 1A. “Risk Factors—Risks Related to Our Business” in our Annual Report.

33

We have attempted to mitigate the impact of commodity prices on our business by entering into hedges, focusing on contracting fee-based business and converting existing commodity-based contracts to fee-based contracts. For additional information regarding our commodity price risk, see Item 7A. “Quantitative and Qualitative Disclosures About Market Risk—Commodity Price Risk” in our Annual Report.

During the three months ended March 31, 2021 as compared to the three months ended March 31, 2020, our revenues and gross margin increased. These increases resulted primarily from the impact of the February 2021 Winter Storm Uri on the areas in which we operate. The winter storm temporarily increased the price of natural gas, which increased our proceeds from product sales. The winter storm also temporarily increased the demand for natural gas for heating, which resulted in imbalance penalties for customers on our gathering and processing and transportation and storage systems for customers who failed to balance actual receipts and deliveries at nominated and confirmed levels. The results of our most recent period may not be indicative of our future results because of the temporary effects of the winter storm. For more information on our results, see “—Financial Results” below.

During the three months ended March 31, 2021 as compared to the three months ended March 31, 2020, our natural gas gathered volumes, processed volumes, transported volumes, and crude oil and condensate gathered volumes decreased. These decreases resulted primarily from reductions in the production of natural gas, NGLs and crude oil. The reductions in supply of these commodities, and the resulting decrease in demand for midstream services, were caused by the effects of preexisting oversupply conditions and exacerbated by the decrease in economic activity due to the COVID-19 pandemic. The results for our most recent period may not be indicative of our future results because of the continuing uncertainty surrounding future levels of production of natural gas, NGLs and crude oil, and the demand for midstream services to move that production to markets. For more information on our results, see “—Financial Results” below.

Recent Developments

Dakota Access Pipeline

On July 6, 2020, the federal district court for the District of Columbia (the “District Court”) issued an order vacating an easement, that was issued by the U.S. Corps of Engineers and which allowed Dakota Access Pipeline to cross the Missouri River, pending the completion of an environmental impact analysis for the pipeline. Although the pipeline currently continues to operate, the District Court is considering whether to order the pipeline shut down during the pendency of the environmental review. Substantially all of the crude oil gathered by our Williston Basin crude oil systems is delivered indirectly for transport to Dakota Access Pipeline. A shutdown of Dakota Access Pipeline could occur if the Corps does not grant an easement following the completion of the environmental impact statement. Although the crude oil gathered by our Williston Basin crude oil systems may also be delivered for transport to other pipelines, such as BakkenLink Pipeline and Enbridge North Dakota Pipeline, a shutdown of the Dakota Access Pipeline, or any other significant pipeline providing transportation services from the Williston Basin, would likely result in the shut-in of wells connected to our Williston Basin crude oil systems if our customer is unable to obtain sufficient capacity on those pipelines at an effective cost. We are unable to predict whether any such pipeline will be shut down, the duration of any such shutdown, or the extent of the resulting impact on the operations of our Williston Basin crude oil and produced water gathering systems.

Five Nations Reservations

On July 9, 2020, the U.S. Supreme Court ruled that the Muscogee (Creek) Nation reservation in Eastern Oklahoma has not been disestablished. Prior to the court’s ruling, the prevailing view was that the Muscogee (Creek) Nation, Chickasaw Nation, Cherokee Nation, Choctaw Nation and Seminole Nation reservations within Oklahoma had been disestablished prior to statehood in 1907. Although the court’s ruling indicates that it is limited to criminal law as applied within the Muscogee (Creek) Nation reservation, the ruling has significant potential implications for civil law within the Muscogee (Creek) Nation reservation, as well as other reservations in Oklahoma that may similarly be found to not have been disestablished.

State district courts in Oklahoma, applying the analysis in the U.S. Supreme Court’s ruling regarding the Muscogee (Creek) Nation, have ruled that the Cherokee, Chickasaw, Seminole and Choctaw reservations likewise have not been disestablished. On October 1, 2020, the EPA granted approval to the State of Oklahoma under Section 10211(a) of the Safe, Accountable, Efficient Transportation Equity Act of 2005 (the “SAFETE Act”) to administer all of the State’s existing EPA-approved regulatory programs to Indian Country within the State, subject to certain exceptions, effectively extending the State’s authority for existing EPA-approved regulatory programs to all lands within the State to which the State applied such programs prior to the U.S. Supreme Court’s ruling. For more information, see the “Five Nations Reservations” disclosure in our Annual Report. At this time, we cannot predict how these issues may ultimately be resolved.

34

Suspension of Leases and Permits on Federal Lands

On January 20, 2021, the Acting Secretary of the U.S. Department of the Interior issued an order that, among other things, imposed a temporary suspension on the issuance of fossil fuel authorizations, including leases and permits on federal lands. Although the order says it does not limit existing operations under valid leases, on January 27, 2021, President Biden signed an executive order suspending new oil and gas leasing on federal lands, pending completion of a review of the federal government’s oil and gas permitting and leasing practices. Less than 2% of acreage dedicated to the Partnership falls on federal lands, with most of our federal land acreage dedications located in the Williston Basin.

Regulatory Compliance

The Pipeline and Hazardous Materials Safety Administration is expected to issue several rules in 2021, including but not limited to: The Pipeline Safety: Safety of Gas Transmission Pipelines, Repair Criteria, Integrity Management Improvements, Cathodic Protection, Management of Change, and Other Related Amendments Rule and the Safety of Gas Gathering Pipelines rule. Other agencies, such as the EPA, are also expected to issue new regulations that may impact our operations. While we cannot predict the outcome of pending or future legislative or regulatory initiatives, we anticipate that pipeline safety and environmental requirements will continue to become more stringent over time. As a result, we may incur significant additional costs to comply with the pending regulations, and any other future laws and regulations, which could have a material impact on our costs of and revenues from operations.

FERC Update

On February 18, 2021, FERC issued a renewed Notice of Inquiry (NOI) seeking input on potential revisions to its current policy statement on the certification of new natural gas transmission facilities. The NOI supplements a 2018 NOI issued by FERC on the same topic. Comments on the NOI are due on May 26, 2021. We are unable to predict what, if any, changes may be proposed as a result of the NOI that would affect our transportation and storage segment or when such proposals, if any, might become effective.

Financial Results

The following tables summarize the key components of our results of operations.

Three Months Ended March 31, 2021	Gathering and Processing		Transportation and Storage		Eliminations		Enable Midstream Partners, LP
	(In millions)
Product sales	$	428	$	332	$	(133)	$	627
Service revenues	196		150		(3)		343
Total Revenues	624		482		(136)		970
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	398		257		(136)		519
Gross margin (1)	226		225		—		451
Operation and maintenance, General and administrative	79		42		—		121
Depreciation and amortization	74		32		—		106
Taxes other than income tax	11		7		—		18
Operating income	$	62	$	144	$	—	$	206

35

Three Months Ended March 31, 2020	Gathering and Processing		Transportation and Storage		Eliminations		Enable Midstream Partners, LP
	(In millions)
Product sales	$	275	$	75	$	(62)	$	288
Service revenues	202		159		(1)		360
Total Revenues	477		234		(63)		648
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	211		78		(63)		226
Gross margin (1)	266		156		—		422
Operation and maintenance, General and administrative	81		45		—		126
Depreciation and amortization	74		30		—		104
Impairments of property, plant and equipment and goodwill	28		—		—		28
Taxes other than income tax	11		7		—		18
Operating income	$	72	$	74	$	—	$	146

 _____________________

(1)Gross margin is a non-GAAP measure and is reconciled to its most directly comparable financial measure calculated and presented below under the caption “Reconciliations of Non-GAAP Financial Measures”.

	Three Months Ended March 31,
	2021	2020
Operating Data:
Natural gas gathered volumes—TBtu	368	411
Natural gas gathered volumes—TBtu/d	4.09	4.52
Natural gas processed volumes—TBtu (1)	185	222
Natural gas processed volumes—TBtu/d (1)	2.06	2.44
NGLs produced—MBbl/d (1)(2)	118.90	120.86
NGLs sold—MBbl/d (2)(3)	119.86	121.32
Condensate sold—MBbl/d	6.78	8.23
Crude oil and condensate gathered volumes—MBbl/d	113.79	141.25
Transported volumes—TBtu	549	597
Transported volumes—TBtu/d	6.10	6.56
Interstate firm contracted capacity—Bcf/d	6.52	6.48
Intrastate average deliveries—TBtu/d	1.65	2.07

 _____________________

(1)Includes volumes under third-party processing arrangements.

(2)Excludes condensate.

(3)NGLs sold includes volumes of NGLs withdrawn from inventory or purchased for system balancing purposes.

36

	Three Months Ended March 31,
	2021	2020
Anadarko
Gathered volumes—TBtu/d	1.98	2.29
Natural gas processed volumes—TBtu/d (1)	1.80	2.08
NGLs produced—MBbl/d (1)(2)	108.04	106.58
Crude oil and condensate gathered volumes—MBbl/d	81.18	114.48
Arkoma
Gathered volumes—TBtu/d	0.39	0.44
Natural gas processed volumes—TBtu/d (1)	0.06	0.08
NGLs produced—MBbl/d (1)(2)	3.49	3.90
Ark-La-Tex
Gathered volumes—TBtu/d	1.72	1.79
Natural gas processed volumes—TBtu/d	0.20	0.28
NGLs produced—MBbl/d (2)	7.37	10.38
Williston
Crude oil gathered volumes—MBbl/d	32.61	26.77

 _____________________

(1)Includes volumes under third-party processing arrangements.

(2)Excludes condensate.

Gathering and Processing

Three months ended March 31, 2021 compared to three months ended March 31, 2020. Our gathering and processing segment reported operating income of $62 million for the three months ended March 31, 2021 compared to operating income of $72 million for the three months ended March 31, 2020. The difference of $10 million in operating income between periods was primarily due to a $40 million decrease in gross margin, partially offset by $28 million of property, plant and equipment and goodwill impairments recognized in 2020 and a $2 million decrease in operation and maintenance and general and administrative expenses.

Our gathering and processing segment revenues increased $147 million. The increase was primarily due to the following:

Product Sales:

•revenues from NGL sales increased $130 million primarily due to an increase in the average realized sales price from higher average market prices for NGL products combined with higher recoveries of ethane, partially offset by lower processed volumes and

•revenues from natural gas sales increased $56 million due to higher average sales prices.

These increases were partially offset by:

•changes in the fair value of natural gas, condensate and NGL derivatives decreased $19 million and

•realized losses on natural gas, condensate and NGL derivatives, which increased $14 million.

Service Revenues:

•processing service revenues increased $3 million due to higher consideration received from percent-of-proceeds, percent-of-liquids and keep-whole processing arrangements due to higher average market prices, partially offset by lower processed volumes under fee-based arrangements.

These increases were partially offset by:

•natural gas gathering revenues decreased $8 million due to lower gathered volumes, inclusive of volume curtailments and production freeze-offs related to Winter Storm Uri, partially offset by higher assessed producer imbalance penalties and

•crude oil, condensate and produced water gathering revenue, which decreased $1 million primarily due to a decrease in gathered crude oil and condensate volumes in the Anadarko Basin, partially offset by an increase in gathered crude oil volumes in the Williston Basin.

37

Our gathering and processing segment gross margin decreased $40 million. The decrease was primarily due to the following:

•changes in the fair value of natural gas, condensate and NGL derivatives decreased $19 million,

•realized losses on natural gas, condensate and NGL derivatives, which increased $14 million,

•revenues from natural gas sales less the cost of natural gas decreased approximately $10 million due to higher intra month natural gas purchase costs during Winter Storm Uri,

•natural gas gathering fees decreased $8 million due to lower gathered volumes, inclusive of volume curtailments and production freeze-offs related to Winter Storm Uri, partially offset by higher assessed producer imbalance penalties, and

•crude oil, condensate and produced water gathering revenues decreased $1 million primarily due to a decrease in gathered crude oil and condensate volumes in the Anadarko Basin, partially offset by an increase in gathered crude oil volumes in the Williston Basin.

These decreases were partially offset by:

•revenues from NGL sales less the cost of NGLs increased $9 million primarily due to an increase in the average realized sales price from higher average market prices for NGL products combined with higher recoveries of ethane, partially offset by lower processed volumes and

•processing service fees increased $3 million due to higher consideration received from percent-of-proceeds, percent-of-liquids and keep-whole processing arrangements due to higher average market prices, partially offset by lower processed volumes under fee-based arrangements.

Our gathering and processing segment operation and maintenance and general and administrative expenses decreased $2 million. The decrease was primarily due to a $6 million decrease in payroll-related costs as a result of lower headcount, a $3 million decrease in field equipment rentals and a $1 million decrease due to insurance proceeds partially offset by remediation costs associated with our Williston Basin operations. These decreases were partially offset by a $7 million increase in professional services primarily due to transaction costs related to the pending merger with Energy Transfer and a $1 million increase due to lower capitalized overhead costs.

During the three months ended March 31, 2020, our gathering and processing segment recognized impairments of property, plant and equipment and goodwill of $28 million. Due to decreases of crude oil and natural gas prices during 2020, management reassessed the carrying value of the Partnership's investment in the Atoka assets, a component of the gathering and processing segment. Due to decreases of crude oil and natural gas prices during 2020, management reassessed the carrying value of the Partnership's investment in the Atoka assets, a component of the gathering and processing segment. Based on forecast future undiscounted cash flows, the Partnership determined that the carrying value of the Atoka assets was not fully recoverable and recognized $16 million of impairment expense. Due to the continuing decreases in forward commodity prices, the reduction in forecast producer activities, the resulting decrease in our forecast cash flows and the increase in the weighted average cost of capital, the Partnership determined that the fair value of the goodwill associated with our Ark-La-Tex Basin reporting unit was completely impaired and recognized $12 million of impairment expense.

Transportation and Storage

Three months ended March 31, 2021 compared to three months ended March 31, 2020. Our transportation and storage segment reported operating income of $144 million for the three months ended March 31, 2021 compared to operating income of $74 million for the three months ended March 31, 2020. The difference of $70 million in operating income between periods was primarily due to a $69 million increase in gross margin, $3 million decrease in operation and maintenance and general and administrative expenses, partially offset by a $2 million increase in depreciation and amortization.

Our transportation and storage segment revenues increased $248 million. The increase was primarily due to the following:

Product Sales:

•revenues from natural gas sales increased $257 million primarily due to higher average sales prices,

•volume-dependent transportation and storage revenues increased $6 million due to an increase in assessed shipper imbalance penalties, partially offset by lower off-system intrastate transported volumes due to decreased production activity in the Anadarko Basin, inclusive of disruptions in natural gas supply associated with Winter Storm Uri, and the recognition in 2020 of $1 million of revenue upon the settlement of the MRT rate case with no comparable item in 2021, and

•revenues from NGL sales increased $1 million due to higher average sales prices, partially offset by lower volumes.

38

These increases were partially offset by changes in the fair value of natural gas derivatives, which decreased $1 million.

Service Revenues:

•firm transportation and storage services decreased $15 million due to the recognition in 2020 of $16 million of previously reserved revenue upon the settlement of the MRT rate case with no comparable item in 2021, partially offset by higher interstate contracted capacity.

Our transportation and storage segment gross margin increased $69 million. The increase was primarily due to the following:

•system management activities increased $74 million primarily due to higher average natural gas sales prices,

•volume-dependent transportation and storage revenues increased $6 million due to an increase in assessed shipper imbalance penalties, partially offset by lower off-system intrastate transported volumes due to decreased production activity in the Anadarko Basin, inclusive of disruptions in natural gas supply associated with Winter Storm Uri, and the recognition in 2020 of $1 million of revenue upon the settlement of the MRT rate case with no comparable item in 2021, and

•a $5 million reduction in lower of cost or net realizable value adjustments related to natural gas storage inventories.

These increases were partially offset by:

•firm transportation and storage services decreased $15 million due to the recognition in 2020 of $16 million of previously reserved revenue upon the settlement of the MRT rate case with no comparable item in 2021, partially offset by higher interstate contracted capacity and

•changes in the fair value of natural gas derivatives, which decreased $1 million.

Our transportation and storage segment operation and maintenance and general and administrative expenses decreased $3 million. The decrease was primarily driven by a $3 million decrease in payroll-related costs as a result of lower headcount and a $3 million decrease in operation and maintenance outside services. These decreases were partially offset by a $3 million increase in the allowance for doubtful accounts.

Our transportation and storage segment depreciation and amortization increased $2 million primarily due to revised estimates of remaining useful lives for certain assets.

Condensed Consolidated Interim Information 

	Three Months Ended March 31,
	2021		2020
	(In millions)
Operating Income	$	206	$	146
Other Income (Expense):
Interest expense	(42)		(47)
Equity in earnings of equity method affiliate, net (1)	1		6
Total Other Expense	(41)		(41)
Income Before Income Taxes	165		105
Income tax benefit	—		—
Net Income	$	165	$	105
Less: Net income (loss) attributable to noncontrolling interest	1		(7)
Net Income Attributable to Limited Partners	$	164	$	112
Less: Series A Preferred Unit distributions	9		9
Net Income Attributable to Common Units	$	155	$	103

_____________________

(1)See Item 1 Note 8 of Part I for discussion regarding ownership interests in SESH and related equity earnings included in the transportation and storage segment for the three months ended March 31, 2021 and 2020.

39

Three Months Ended March 31, 2021 compared to Three Months Ended March 31, 2020

Net Income Attributable to Limited Partners. We reported net income attributable to limited partners of $164 million in the three months ended March 31, 2021 compared to net income attributable to limited partners of $112 million in the three months ended March 31, 2020. The increase in net income attributable to limited partners of $52 million was primarily attributable to an increase in operating income of $60 million and a decrease in interest expense of $5 million, partially offset by an $8 million change in net income (loss) attributable to noncontrolling interest in the prior year and a decrease in equity in earnings of equity method affiliate, net of $5 million in the three months ended March 31, 2021.

Equity in Earnings of Equity Method Affiliate, net. Equity in earnings of equity method affiliate, net decreased $5 million due to a decrease in revenues as a result of contract expirations, partially offset by an increase in amortization of the basis differential.

Interest Expense. Interest expense decreased $5 million primarily due to lower debt levels and lower interest rates on the Partnership’s short-term borrowings.

Net Income (Loss) Attributable to Noncontrolling Interest. Net income (loss) attributable to noncontrolling interest changed $8 million primarily due to an impairment in 2020 in the Partnership’s Atoka assets of which the Partnership owns a 50% interest in the consolidated joint venture.

Reconciliations of Non-GAAP Financial Measures

The Partnership has included the non-GAAP financial measures Gross margin, Adjusted EBITDA, Adjusted interest expense, DCF and Distribution coverage ratio in this report based on information in its Condensed Consolidated Financial Statements. Gross margin, Adjusted EBITDA, Adjusted interest expense, DCF and Distribution coverage ratio are part of the performance measures that we use to manage the Partnership.

Provided below are reconciliations of Gross margin to total revenues, Adjusted EBITDA and DCF to net income attributable to limited partners, and Adjusted EBITDA to net cash provided by operating activities and Adjusted interest expense to interest expense, the most directly comparable GAAP financial measures, on a historical basis, as applicable, for each of the periods indicated. Gross margin, Adjusted EBITDA, Adjusted interest expense, DCF and Distribution coverage ratio should not be considered as alternatives to net income, operating income, total revenues, cash flow from operating activities or any other measure of financial performance or liquidity presented in accordance with GAAP. These non-GAAP financial measures have important limitations as analytical tools because they exclude some but not all items that affect the most directly comparable GAAP measures. Additionally, because Gross margin, Adjusted EBITDA, Adjusted interest expense, DCF and Distribution coverage ratio may be defined differently by other companies in the Partnership’s industry, these measures may not be comparable to similarly titled measures of other companies, thereby diminishing their utility.

40

	Three Months Ended March 31,
	2021		2020
	(In millions)
Reconciliation of Gross margin to Total Revenues:
Consolidated
Product sales	$	627	$	288
Service revenues	343		360
Total Revenues	970		648
Cost of natural gas and natural gas liquids (excluding depreciation and amortization)	519		226
Gross margin	$	451	$	422
Reportable Segments
Gathering and Processing
Product sales	$	428	$	275
Service revenues	196		202
Total Revenues	624		477
Cost of natural gas and natural gas liquids (excluding depreciation and amortization)	398		211
Gross margin	$	226	$	266
Transportation and Storage
Product sales	$	332	$	75
Service revenues	150		159
Total Revenues	482		234
Cost of natural gas and natural gas liquids (excluding depreciation and amortization)	257		78
Gross margin	$	225	$	156

The following table shows the components of our gross margin.

	Fee-Based (1)
Three Months Ended March 31, 2021	Demand		Volume- Dependent		Commodity- Based (1)		Total
Gathering and Processing Segment	11	%	76	%	13	%	100	%
Transportation and Storage Segment	56	%	10	%	34	%	100	%
Partnership Weighted Average	34	%	42	%	24	%	100	%

____________________

(1)For purposes of this table, the Partnership includes the value of all natural gas and NGL commodities received as payment as commodity-based.

41

	Three Months Ended March 31,
	2021		2020
	(In millions, except Distribution coverage ratio)
Reconciliation of Adjusted EBITDA and DCF to net income attributable to limited partners and calculation of Distribution coverage ratio:
Net income attributable to limited partners	$	164	$	112
Depreciation and amortization expense	106		104
Interest expense, net of interest income	42		47
Distributions received from equity method affiliate in excess of equity earnings	3		4
Non-cash equity-based compensation	4		4
Change in fair value of derivatives (1)	10		(10)
Other non-cash (gains) losses (2)	(1)		5
Impairments of property, plant and equipment and goodwill	—		28
Noncontrolling Interest Share of Adjusted EBITDA	—		(8)
Adjusted EBITDA	$	328	$	286
Series A Preferred Unit distributions (3)	(9)		(9)
Adjusted interest expense (4)	(42)		(47)
Maintenance capital expenditures	(16)		(16)
DCF	$	261	$	214
Distributions related to common unitholders (5)	$	72	$	72
Distribution coverage ratio (6)	3.63		2.97

____________________

(1)Change in fair value of derivatives includes changes in the fair value of derivatives that are not designated as hedging instruments.

(2)Other non-cash (gains) losses includes write-downs and gains and loss on sale and retirement of assets.

(3)This amount represents the quarterly cash distributions on the Series A Preferred Units declared for the three months ended March 31, 2021 and 2020. In accordance with the Partnership Agreement, the Series A Preferred Unit distributions are deemed to have been paid out of available cash with respect to the quarter immediately preceding the quarter in which the distribution is made.

(4)See below for a reconciliation of Adjusted interest expense to Interest expense.

(5)Represents cash distributions declared for common units outstanding as of each respective period. Amounts for 2021 reflect estimated cash distributions for common units outstanding for the quarter ended March 31, 2021.

(6)Distribution coverage ratio is computed by dividing DCF by Distributions related to common unitholders.

42

	Three Months Ended March 31,
	2021		2020
	(In millions)
Reconciliation of Adjusted EBITDA to net cash provided by operating activities:
Net cash provided by operating activities	$	223	$	200
Interest expense, net of interest income	42		47
Noncontrolling interest share of cash provided by operating activities	(1)		(1)
Other non-cash items (1)	(3)		4
Proceeds from insurance	1		—
Changes in operating working capital which (provided) used cash:
Accounts receivable	34		(60)
Accounts payable	(10)		58
Other, including changes in noncurrent assets and liabilities	29		44
Return of investment in equity method affiliate	3		4
Change in fair value of derivatives (2)	10		(10)
Adjusted EBITDA	$	328	$	286

____________________

(1)Other non-cash items primarily includes write-downs of assets.

(2)Change in fair value of derivatives includes changes in the fair value of derivatives that are not designated as hedging instruments.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Reconciliation of Adjusted interest expense to Interest expense:
Interest expense	$	42	$	47
Amortization of premium on long-term debt	—		1
Capitalized interest on expansion capital	1		—
Amortization of debt expense and discount	(1)		(1)
Adjusted interest expense	$	42	$	47

Off-Balance Sheet Arrangements

We do not have any off-balance sheet arrangements.

Critical Accounting Policies and Estimates

The Partnership’s critical accounting policies and estimates are described in Critical Accounting Policies and Estimates within Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and Note 1 of the Notes to Consolidated Financial Statements in Item 8. “Financial Statements and Supplementary Data” in our Annual Report. The accounting policies and estimates used in preparing our interim Condensed Consolidated Financial Statements for the three months ended March 31, 2021 are the same as those described in our Annual Report.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

We are exposed to various market risks, including volatility in commodity prices and interest rates.

Commodity Price Risk

While we generate a substantial portion of our gross margin pursuant to fee-based contracts that include minimum volume commitments and/or demand fees, we are also directly and indirectly exposed to changes in the prices of natural gas,

43

condensate and NGLs. Direct exposure includes the impact of commodity prices on our physical commodity positions, and indirect exposure includes the impact of commodity prices on the demand for midstream services due to changes in the exploration and production of commodities. The Partnership utilizes derivatives and forward commodity sales to mitigate the effects of price changes from our direct exposure to commodity price risks. We do not enter into risk management contracts for speculative purposes. For further information regarding our derivatives, see Note 10 of the Notes to the Condensed Consolidated Financial Statements.

Based on our forecast volumes, prices and contractual arrangements, we estimate approximately 13% of our total gross margin for the twelve months ended December 31, 2021 is directly exposed to changes in commodity prices, excluding the impact of hedges and contractual floors related to commodity prices in certain agreements. Since March 31, 2021, we have entered into additional derivative contracts to further manage our exposure to commodity price risk for the remaining nine months ending December 31, 2021.

Our direct exposure to commodity price risk is estimated as the potential loss in value resulting from a hypothetical 10% decline in prices over the next nine months. Based on a sensitivity analysis regarding our direct commodity exposure, a 10% decrease in prices from forecast levels would decrease net income by approximately $8 million for natural gas and ethane and $12 million for NGLs (other than ethane) and condensate, excluding the impact of hedges, for the remaining nine months ending December 31, 2021.

Interest Rate Risk

Our current interest rate risk exposure is related primarily to our debt portfolio and distributions on the Series A Preferred Units. Our debt portfolio includes senior notes with a fixed rate of interest, which mitigates the impact of fluctuations in interest rates. Future issuances of long-term debt could be impacted by increases in interest rates, which could result in higher interest costs. Borrowings under our 2019 Term Loan Agreement and any issuances under our commercial paper program and distributions on our Series A Preferred Units are at a variable interest rate and expose us to the risk of increasing interest rates. The Partnership utilizes derivatives to mitigate the risk of interest rate changes. We do not enter into risk management contracts for speculative purposes. For further information regarding our derivatives, see Note 10 of the Notes to the Condensed Consolidated Financial Statements.

Based upon the $1.0 billion outstanding borrowings under commercial paper and 2019 Term Loan Agreement as of March 31, 2021, excluding the impact of hedges and holding all other variables constant, a 100 basis-point, or 1%, increase in interest rates would increase our annual interest expense by approximately $10 million. For further information regarding our interest rates, see Note 9 of the Notes to the Condensed Consolidated Financial Statements.

Beginning February 18, 2021, distributions on the Series A Preferred Units, when declared, are calculated at a floating rate equal to the sum of the three-month LIBOR plus 8.5%. Based upon the $362 million outstanding under the Series A Preferred Units as of March 31, 2021, holding all variables constant, a 100 basis-point, or 1%, increase in interest rates would increase our Series A Preferred Unit annual distributions by $4 million. For further information regarding the Series A Preferred Units, see Note 6 of the Notes to the Condensed Consolidated Financial Statements.

Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our chief executive officer and chief financial officer, has evaluated the effectiveness of our disclosure controls and procedures (as such term is defined in Rules 13a-15(e) under the Exchange Act) as of March 31, 2021. Based on such evaluation, our management has concluded that, as of March 31, 2021, our disclosure controls and procedures are designed and effective to ensure that information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified by the SEC’s rules and forms and that information is accumulated and communicated to our management, including its principal executive officer and principal financial officer, or persons performing similar functions, as appropriate, to allow timely decisions regarding required disclosure.

In designing and evaluating our disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable, and not absolute, assurance that the objectives of the control system will be met. In addition, the design of any control system is based in part upon certain assumptions about the likelihood of future events and the application of judgment in evaluating the cost-benefit relationship of

44

possible controls and procedures. Because of these and other inherent limitations of control systems, there is only reasonable assurance that our controls will succeed in achieving their goals under all potential future conditions.

Changes in Internal Controls Over Financial Reporting

There were no changes in our internal controls over financial reporting during the quarter ended March 31, 2021, that have materially affected, or that are reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

Information regarding legal proceedings is set forth in Note 14—Commitments and Contingencies to the Partnership’s Condensed Consolidated Financial Statements included in Item 1 of Part I of this Quarterly Report on Form 10-Q and is incorporated herein by reference.

Item 1A. Risk Factors

We are subject to various risks and uncertainties in the course of our business. Risk factors relating to the Partnership are set forth under “Risk Factors” in our Annual Report. No other material changes to such risk factors have occurred during the three months ended March 31, 2021.

Item 6. Exhibits

Exhibits not incorporated by reference to a prior filing are designated by a cross (+); all exhibits not so designated are incorporated by reference to a prior filing as indicated. Management contracts and compensatory plans and arrangements are designated by a star (*).

Agreements included as exhibits are included only to provide information to investors regarding their terms. Agreements listed below may contain representations, warranties and other provisions that were made, among other things, to provide the parties thereto with specified rights and obligations and to allocate risk among them, and no such agreement should be relied upon as constituting or providing any factual disclosures about Enable Midstream Partners, LP, any other persons, any state of affairs or other matters.

45

Exhibit Number	Description	Report or Registration Statement	SEC File or Registration Number	Exhibit Reference
2.1	Master Formation Agreement dated as of March 14, 2013 by and among CenterPoint Energy, Inc., OGE Energy Corp., Bronco Midstream Holdings, LLC and Bronco Midstream Holdings II, LLC	Registrant’s registration statement on Form S-1, filed on November 26, 2013	File No. 333-192545	Exhibit 2.1
2.2	Agreement and Plan of Merger, dated as of February 16, 2021 by and among Energy Transfer LP, Elk Merger Sub LLC, Elk GP Merger Sub LLC, Enable Midstream Partners, LP, Enable GP, LLC, solely for purposes of Section 2.1(a)(i) therein, LE GP, LLC and, solely for purposes of Section 1.1(b)(i), CenterPoint Energy, Inc.**	Registrant’s Form 8-K filed February 17, 2021	File No. 001-36413	Exhibit 2.1
3.1	Certificate of Limited Partnership of CenterPoint Energy Field Services LP, as amended	Registrant’s registration statement on Form S-1, filed on November 26, 2013	File No. 333-192545	Exhibit 3.1
3.2	Fifth Amended and Restated Agreement of Limited Partnership of Enable Midstream Partners, LP	Registrant’s Form 8-K filed November 15, 2017	File No. 001-36413	Exhibit 3.1
4.1	Specimen Unit Certificate representing common units (included with Second Amended and Restated Agreement of Limited Partnership of Enable Midstream Partners, LP as Exhibit A thereto)	Registrant’s Form 8-K filed April 22, 2014	File No. 001-36413	Exhibit 3.1
4.2	Indenture, dated as of May 27, 2014, between Enable Midstream Partners, LP and U.S. Bank National Association, as trustee.	Registrant’s Form 8-K filed May 29, 2014	File No. 001-36413	Exhibit 4.1
4.3	First Supplemental Indenture, dated as of May 27, 2014, by and among Enable Midstream Partners, LP, CenterPoint Energy Resources Corp., as guarantor, and U.S. Bank National Association, as trustee.	Registrant’s Form 8-K filed May 29, 2014	File No. 001-36413	Exhibit 4.2
4.4	Registration Rights Agreement, dated as of May 27, 2014, by and among Enable Midstream Partners, LP, CenterPoint Energy Resources Corp., as guarantor, and RBS Securities Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated, Credit Suisse Securities (USA) LLC, and RBC Capital Markets, LLC, as representatives of the initial purchasers	Registrant’s Form 8-K filed May 29, 2014	File No. 001-36413	Exhibit 4.3
4.5	Registration Rights Agreement, dated as of February 18, 2016, by and between Enable Midstream Partners, LP and CenterPoint Energy, Inc.	Registrant’s Form 8-K filed February 19, 2016	File No. 001-36413	Exhibit 4.1
4.6	Second Supplemental Indenture, dated as of March 9, 2017, by and between Enable Midstream Partners, LP and U.S. Bank National Association, as trustee.	Registrant’s Form 8-K filed March 9, 2017	File No. 001-36413	Exhibit 4.2
4.7	Third Supplemental Indenture, dated as of May 10, 2018, by and between Enable Midstream Partners, LP and U.S. Bank National Association, as trustee.	Registrant’s Form 8-K filed May 10, 2018	File No. 001-36413	Exhibit 4.2
4.8	Fourth Supplemental Indenture, dated as of September 13, 2019, by and between Enable Midstream Partners, LP and U.S. Bank National Association, as trustee.	Registrant’s Form 8-K filed September 13, 2019	File No. 001-36413	Exhibit 4.2
10.1	Support Agreement, dated as of February 16, 2021, by and among Energy Transfer LP, Elk Merger Sub LLC, Elk GP Merger Sub LLC, Enable Midstream Partners, LP, Enable GP, LLC and CenterPoint Energy, Inc.	Registrant’s Form 8-K filed February 17, 2021	File No. 001-36413	Exhibit 10.1
10.2	Support Agreement, dated as of February 16, 2021, by and among Energy Transfer LP, Elk Merger Sub LLC, Elk GP Merger Sub LLC, Enable Midstream Partners, LP, Enable GP, LLC and OGE Energy Corp.	Registrant’s Form 8-K filed February 17, 2021	File No. 001-36413	Exhibit 10.2
+31.1	Rule 13a-14(a)/15d-14(a) Certification of principal executive officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
+31.2	Rule 13a-14(a)/15d-14(a) Certification of principal financial officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
+32.1	Section 1350 Certification of principal executive officer
+32.2	Section 1350 Certification of principal financial officer
+101.INS	XBRL Instance Document.
+101.SCH	XBRL Taxonomy Schema Document.
+101.PRE	XBRL Taxonomy Presentation Linkbase Document.
+101.LAB	XBRL Taxonomy Label Linkbase Document.
+101.CAL	XBRL Taxonomy Calculation Linkbase Document.
+101.DEF	XBRL Definition Linkbase Document.

46

SIGNATURE

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.

		ENABLE MIDSTREAM PARTNERS, LP
		(Registrant)
		By: ENABLE GP, LLC
		Its general partner
Date:	May 3, 2021	By:	/s/ Tom Levescy
			Tom Levescy
			Senior Vice President, Chief Accounting Officer and Controller
			(Principal Accounting Officer)

47

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Rodney J. Sailor, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Enable Midstream Partners, LP;

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: May 3, 2021

  /s/ Rodney J. Sailor

       Rodney J. Sailor

President and Chief Executive Officer, Enable GP, LLC, the General Partner of Enable Midstream Partners, LP

(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, John P. Laws, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Enable Midstream Partners, LP;

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: May 3, 2021

  /s/ John P. Laws

John P. Laws

Executive Vice President, Chief Financial Officer and Treasurer, Enable GP, LLC, the General Partner of Enable Midstream Partners, LP

(Principal Financial 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 Enable Midstream Partners, LP (the Partnership) on Form 10-Q for the period ended March 31, 2021, as filed with the Securities and Exchange Commission (the Report), I, Rodney J. Sailor, President and Chief Executive Officer of Enable GP, LLC, the general partner of the Partnership, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

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 Partnership.

Date: May 3, 2021

          /s/ Rodney J. Sailor

               Rodney J. Sailor

President and Chief Executive Officer, Enable GP, LLC, the General Partner of Enable Midstream Partners, LP

(Principal Executive Officer)

EX-32.2

Exhibit 32.2

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 Enable Midstream Partners, LP (the Partnership) on Form 10-Q for the period ended March 31, 2021, as filed with the Securities and Exchange Commission (the Report), I, John P. Laws, Executive Vice President, Chief Financial Officer, and Treasurer of Enable GP, LLC, the general partner of the Partnership, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

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 Partnership.

Date: May 3, 2021

/s/ John P. Laws

John P. Laws

Executive Vice President, Chief Financial Officer and Treasurer, Enable GP, LLC, the General Partner of Enable Midstream Partners, LP

(Principal Financial Officer)

XML

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	Apr. 16, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	1-36413
Entity Registrant Name	ENABLE MIDSTREAM PARTNERS, LP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	72-1252419
Entity Address, Address Line One	499 West Sheridan Avenue,
Entity Address, Address Line Two	Suite 1500
Entity Address, City or Town	Oklahoma City,
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	73102
City Area Code	405
Local Phone Number	525-7788
Title of 12(b) Security	Common Units Representing Limited Partner Interests
Trading Symbol	ENBL
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001591763
Entity Common Stock, Shares Outstanding		435,866,139
Current Fiscal Year End Date	--12-31

XML

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues (including revenues from affiliates (Note 13)):
Total Revenues	$ 970	$ 648
Cost and Expenses (including expenses from affiliates (Note 13)):
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	519	226
Operation and maintenance	84	102
General and administrative	37	24
Depreciation and amortization	106	104
Impairments of property, plant and equipment and goodwill (Note 7)	0	28
Taxes other than income tax	18	18
Total Cost and Expenses	764	502
Operating Income	206	146
Other Income (Expense):
Interest expense	(42)	(47)
Equity in earnings (losses) of equity method affiliate, net	1	6
Total Other Expense	(41)	(41)
Income Before Income Tax
Income Before Income Tax	165	105
Income tax benefit	0	0
Net Income
Net Income	165	105
Less: Net income (loss) attributable to noncontrolling interest
Less: Net income (loss) attributable to noncontrolling interest	1	(7)
Net Income Attributable to Limited Partners
Net Income Attributable to Limited Partners	164	112
Less: Series A Preferred Unit distributions (Note 6)
Less: Series A Preferred Unit distributions (Note 6)	9	9
Net Income Attributable to Common Units (Note 5)
Net Income Attributable to Common Units (Note 5)	155	103
Common Unit [Member]
Net Income Attributable to Common Units (Note 5)
Net Income Attributable to Common Units (Note 5)	$ 155	$ 103
Basic and Diluted earnings per unit and weighted average number of units outstanding
Basic and diluted earnings per unit (Note 5)	$ 0.35	$ 0.24
Diluted	$ 0.33	$ 0.19
Product
Revenues (including revenues from affiliates (Note 13)):
Total Revenues	$ 627	$ 288
Natural Gas, Gathering, Transportation, Marketing and Processing
Revenues (including revenues from affiliates (Note 13)):
Total Revenues	$ 343	$ 360

XML

Condensed Consolidated Statement of Comprehensive Income Statement (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 165	$ 105
Other comprehensive income (loss):
Change in fair value of interest rate derivative instruments	0	(6)
Reclassification of interest rate derivative losses to net income	1	0
Other comprehensive income (loss)	1	(6)
Comprehensive income	166	99
Less: Comprehensive income (loss) attributable to noncontrolling interest	1	(7)
Comprehensive income attributable to Limited Partners	$ 165	$ 106

XML

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 32	$ 3
Accounts receivable, net of allowance for doubtful accounts (Note 1)	284	248
Accounts receivable—affiliated companies	13	15
Inventory	44	42
Gas imbalances	49	42
Other current assets, net of allowance for doubtful accounts (Note 1)	27	31
Total current assets	449	381
Property, Plant and Equipment:
Property, plant and equipment	13,287	13,220
Less: Accumulated depreciation and amortization	2,633	2,555
Property, plant and equipment, net	10,654	10,665
Other Assets:
Intangible assets, net	523	539
Investment in equity method affiliate	73	76
Other	65	68
Total other assets	661	683
Total Assets	11,764	11,729
Current Liabilities:
Accounts payable	158	149
Accounts payable—affiliated companies	1	2
Current portion of long-term debt	800	0
Short-term debt	214	250
Taxes accrued	26	34
Gas imbalances	13	19
Other	122	128
Total current liabilities	1,334	582
Other Liabilities:
Accumulated deferred income taxes, net	4	5
Regulatory liabilities	26	25
Other	67	71
Total other liabilities	97	101
Long-Term Debt	3,152	3,951
Commitments and Contingencies (Note 14)
Partners’ Equity:
Series A Preferred Units (14,520,000 issued and outstanding at March 31, 2021 and December 31, 2020)	362	362
Common Units (435,846,766 issued and outstanding at March 31, 2021 and 435,549,892 issued and outstanding at December 31, 2020)	6,798	6,713
Accumulated other comprehensive loss	(5)	(6)
Noncontrolling interest	26	26
Total Partners’ Equity	7,181	7,095
Total Liabilities and Partners’ Equity	$ 11,764	$ 11,729

XML

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - shares	Mar. 31, 2021	Dec. 31, 2020
Common Unit [Member]
Common units issued	435,846,766	435,549,892
Common units outstanding	435,846,766	435,549,892
Series A Preferred Units [Member]
Preferred Units, Issued	14,520,000	14,520,000
Preferred Units, Outstanding	14,520,000	14,520,000

XML

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities:
Net income	$ 165	$ 105
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	106	104
Impairments of property, plant and equipment and goodwill	0	28
Net loss on sale/retirement of assets	0	1
Equity in earnings of equity method affiliate	(1)	(6)
Return on investment in equity method affiliate	1	6
Equity-based compensation	4	4
Amortization of debt costs and discount	1	0
Changes in other assets and liabilities:
Accounts receivable, net	(36)	52
Accounts receivable—affiliated companies	2	8
Inventory	(2)	3
Gas imbalance assets	(7)	(1)
Other current assets, net	2	(6)
Other assets	2	1
Accounts payable	11	(59)
Accounts payable—affiliated companies	(1)	1
Gas imbalance liabilities	(6)	(2)
Other current liabilities	(14)	(35)
Other liabilities	(4)	(4)
Net cash provided by operating activities	223	200
Cash Flows from Investing Activities:
Capital expenditures	(80)	(54)
Proceeds from sale of assets	1	0
Return of investment in equity method affiliate	3	4
Other, net	1	2
Net cash used in investing activities	(75)	(48)
Cash Flows from Financing Activities:
Decrease in short-term debt	(36)	(45)
Repayment of long-term debt	0	(250)
Proceeds from Revolving Credit Facility	0	340
Repayment of Revolving Credit Facility	0	(40)
Distributions to common unitholders	(72)	(144)
Distributions to preferred unitholders	(9)	(9)
Distributions to non-controlling interests	(1)	(3)
Cash paid for employee equity-based compensation	(1)	(1)
Net cash used in financing activities	(119)	(152)
Net Increase in Cash, Cash Equivalents and Restricted Cash	29	0
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	3	4
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 32	$ 4

XML

Condensed Consolidated Statements of Partners' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interest [Member]	Series A Preferred Units [Member] Preferred Units	Common Unit [Member] Partners' Capital	Common Unit [Member] Partners' Capital Cumulative Effect, Period of Adoption, Adjustment	AOCI Attributable to Parent
Balance, beginning of period at Dec. 31, 2019	$ 7,409	$ (3)	$ 37	$ 362	$ 7,013	$ (3)	$ (3)
Balance, beginning of period, units at Dec. 31, 2019				15	435
Changes in Partners' Capital
Net Income	105		(7)	$ 9	$ 103
Other comprehensive loss	(6)						(6)
Partners' Capital Account, Distributions	(156)		(3)	(9)	(144)
Partners' Capital Account, Unit-based Compensation, Net of Taxes	3				$ 3
Equity-based compensation, net of units for employee taxes, units					0
Balance, end of period at Mar. 31, 2020	7,352		27	$ 362	$ 6,972		(9)
Balance, end of period, units at Mar. 31, 2020				15	435
Balance, beginning of period at Dec. 31, 2020	7,095		26	$ 362	$ 6,713		(6)
Balance, beginning of period, units at Dec. 31, 2020				15	435
Changes in Partners' Capital
Net Income	165		1	$ 9	$ 155
Other comprehensive loss	1						1
Partners' Capital Account, Distributions	(82)		(1)	(9)	(72)
Partners' Capital Account, Unit-based Compensation, Net of Taxes	2				$ 2
Equity-based compensation, net of units for employee taxes, units					1
Balance, end of period at Mar. 31, 2021	$ 7,181		$ 26	$ 362	$ 6,798	$ 0	$ (5)
Balance, end of period, units at Mar. 31, 2021				15	436

XML

Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Organization

Enable Midstream Partners, LP (the Partnership) is a Delaware limited partnership whose assets and operations are organized into two reportable segments: (i) gathering and processing and (ii) transportation and storage. Our gathering and processing segment primarily provides natural gas gathering and processing services to our producer customers and crude oil, condensate and produced water gathering services to our producer and refiner customers. The transportation and storage segment provides interstate and intrastate natural gas pipeline transportation and storage services primarily to our producer, power plant, LDC and industrial end-user customers. Our natural gas gathering and processing assets are primarily located in Oklahoma, Texas, Arkansas and Louisiana and serve natural gas production in the Anadarko, Arkoma and Ark-La-Tex Basins. Crude oil gathering assets are located in Oklahoma and serve crude oil production in the SCOOP and STACK plays of the Anadarko Basin and in North Dakota and serve crude oil production in the Bakken Shale formation of the Williston Basin. The Partnership’s natural gas transportation and storage assets consist primarily of an interstate pipeline system extending from western Oklahoma and the Texas Panhandle to Louisiana, an interstate pipeline system extending from Louisiana to Illinois, an intrastate pipeline system in Oklahoma, and our investment in SESH, a pipeline extending from Louisiana to Alabama.

CenterPoint Energy and OGE Energy each have 50% of the management interests in Enable GP. Enable GP is the general partner of the Partnership and has no other operating activities. Enable GP is governed by a board made up of two representatives designated by each of CenterPoint Energy and OGE Energy, along with the Partnership’s Chief Executive Officer and three independent board members CenterPoint Energy and OGE Energy mutually agreed to appoint. CenterPoint Energy and OGE Energy also own a 40% and 60% interest, respectively, in the incentive distribution rights held by Enable GP.

As of March 31, 2021, CenterPoint Energy held approximately 53.7% or 233,856,623 of the Partnership’s common units, and OGE Energy held approximately 25.5% or 110,982,805 of the Partnership’s common units. Additionally, CenterPoint Energy holds 14,520,000 Series A Preferred Units. The limited partner interests of the Partnership have limited voting rights on matters affecting the business. As such, limited partners do not have rights to elect the Partnership’s general partner on an annual or continuing basis and may not remove Enable GP, its current general partner, without at least a 75% vote by all unitholders, including all units held by the Partnership’s limited partners, and Enable GP and its affiliates, voting together as a single class.

As of March 31, 2021, the Partnership owned a 50% interest in SESH. See Note 8 for further discussion of SESH. For the three months ended March 31, 2021, the Partnership owned a 50% ownership in Atoka and consolidated Atoka in the accompanying Condensed Consolidated Financial Statements as EOIT acted as the managing member of Atoka and had control over the operations of Atoka. In addition, the Partnership held a 60% interest in ESCP, which is consolidated in the accompanying Condensed Consolidated Financial Statements as EOCS acted as the managing member of ESCP and had control over the operations of ESCP.

Merger Agreement

On February 17, 2021, the Partnership and Energy Transfer announced their entry into a Merger Agreement, whereby the Partnership will be acquired by Energy Transfer in an all-equity transaction, including the assumption of debt and other liabilities. Under the terms of the Merger Agreement, which has been unanimously approved by the Boards of Directors of both companies, Partnership common unitholders will receive 0.8595 of an Energy Transfer common unit for each Partnership common unit. Each of the Partnership’s Series A Preferred Units will be exchanged for 0.0265 Series G preferred units of Energy Transfer. The transaction will also include a $10 million cash payment for the Partnership’s general partner.

Generally, the Merger, including the receipt of equity consideration by common unitholders is expected to be treated as a tax-free transaction subject to certain exceptions as described in a Registration Statement on Form S-4 filed by Energy Transfer. The transaction, which is expected to close in mid-2021, is subject to customary closing conditions. CenterPoint Energy and OGE Energy, who collectively own approximately 79% of the outstanding Partnership common units, delivered their consents to the transaction. The Merger Agreement includes certain customary restrictions on the Partnership until closing of the Merger, such as limitations on distributions, equity issuances, and incurring and prepaying indebtedness. If the Merger does not occur, under certain circumstances, the Partnership may be required to pay Energy Transfer a termination fee of $97.5 million. Until the approval by unitholders and subsequent closing, we must continue to operate the Partnership as a stand-alone company.

Basis of Presentation

The accompanying Condensed Consolidated Financial Statements and related notes of the Partnership have been prepared pursuant to the rules and regulations of the SEC and GAAP. Pursuant to such rules and regulations, certain disclosures normally included in financial statements prepared in accordance with GAAP have been omitted. The accompanying Condensed Consolidated Financial Statements and related notes should be read in conjunction with the Consolidated Financial Statements and related notes included in our Annual Report.

The Condensed Consolidated Financial Statements and the related notes reflect all normal recurring adjustments that are, in the opinion of management, necessary to present fairly the financial position and results of operations for the respective periods. Amounts reported in the Partnership’s Condensed Consolidated Statements of Income are not necessarily indicative of amounts expected for a full-year period due to the effects of, among other things, (a) seasonal fluctuations in demand for energy and energy services, (b) changes in energy commodity prices, (c) timing of maintenance and other expenditures, (d) acquisitions and dispositions of businesses, assets and other interests, and (e) the impact of the ongoing COVID-19 pandemic and the economic effects of the pandemic which have resulted in a substantial decrease in natural gas, NGLs and crude oil prices.

For a description of the Partnership’s reportable segments, see Note 16.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Sales and Retirements of Assets

On September 23, 2019, the Partnership entered into an agreement to sell its undivided 1/12th interest in the Bistineau Storage Facility in Louisiana for approximately $19 million. On January 27, 2020, FERC approved the sale. The Partnership closed the sale on April 1, 2020. We did not recognize a gain or loss on this transaction.

Depreciation Expense

On March 26, 2020, FERC issued an order approving MRT’s 2018 Rate Case and 2019 Rate Case settlements. As a result of the settlements, the new depreciation rates for MRT have been applied in accordance with the order. The new depreciation rates did not result in a material change in depreciation expense or results of operations.

Accounts Receivable and Allowance for Doubtful Accounts

The Partnership adopted ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” on January 1, 2020. Upon adoption, the Partnership recognized a $3 million cumulative adjustment to Partners’ Equity and a corresponding adjustment to Allowance for doubtful accounts.

Accounts receivable are recorded at the invoiced amount and do not typically bear interest. The determination of the allowance for doubtful accounts requires management to make estimates and judgments regarding our customers’ ability to pay. The allowance for doubtful accounts is determined based primarily upon the historical loss-rate method established for various pools of accounts receivables with similar levels of credit risk. The historical loss-rates are then adjusted, as necessary, based on current conditions and forecast information that could result in future uncollectable amounts. On an ongoing basis, we evaluate our customers’ financial strength and liquidity based on aging of accounts receivable, payment history, and review of other relevant information, including ratings agency credit ratings and alerts, publicly available reports and news releases, and bank and trade references. It is the policy of management to review the outstanding accounts receivable and other receivable balances within other assets at least quarterly, giving consideration to credit losses, the aging of receivables, specific customer circumstances that may impact their ability to pay the amounts due and current and forecast economic conditions over the assets contractual lives. The following table summarizes the required allowance for doubtful accounts.

	March 31, 2021		December 31, 2020
	(In millions)
Accounts receivable	$	4	$	1
Other assets	3		3
Total Allowance for doubtful accounts	$	7	$	4

Inventory

Natural gas inventory is held, through the transportation and storage segment, to provide operational support for pipeline deliveries and to manage leased intrastate storage capacity. Natural gas liquids inventory is held, through the gathering and processing segment, due to timing differences between the production of certain natural gas liquids and ultimate sale to third parties. Natural gas and natural gas liquids inventory is valued using moving average cost and is subsequently recorded at the lower of cost or net realizable value. The Partnership recorded write-downs to net realizable value related to natural gas and natural gas liquids inventory of $1 million and $6 million during the three months ended March 31, 2021 and 2020, respectively.

Impairment of Long-Lived Assets (including Intangible Assets)

The Partnership periodically evaluates long-lived assets, including property, plant and equipment, and specifically identifiable intangibles other than goodwill, when events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. The determination of whether an impairment has occurred is based on an estimate of undiscounted cash flows attributable to the assets, as compared to the carrying value of the assets. For more information, see Note 7.

Impairment of Goodwill

The Partnership assesses its goodwill for impairment annually on October 1st, or more frequently if events or changes in circumstances indicate that the carrying value of goodwill may not be recoverable. Goodwill is assessed for impairment by comparing the fair value of the reporting unit with its book value, including goodwill. The Partnership utilizes the market or income approaches to estimate the fair value of the reporting unit, also giving consideration to the alternative cost approach. Under the market approach, historical and current year forecasted cash flows are multiplied by a market multiple to determine fair value. Under the income approach, anticipated cash flows over a period of years plus a terminal value are discounted to present value using appropriate discount rates. The resulting fair value of the reporting unit is then compared to the carrying amount of the reporting unit and an impairment charge is recorded to goodwill for the difference. The Partnership performs its goodwill impairment testing at the reporting unit, which is one level below the transportation and storage and gathering and processing reportable segment level. For more information, see Note 7.

XML

New Accounting Pronouncements

3 Months Ended

Mar. 31, 2021

Accounting Changes and Error Corrections [Abstract]

New Accounting Pronouncements

New Accounting Pronouncements

Reference Rate Reform

In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” This standard provides optional guidance, for a limited time, to ease the potential burden in accounting for or recognizing the effects of reference rate reform on financial reporting. The standard was effective upon issuance and generally can be applied through December 31, 2022. The Partnership adopted ASU 2020-04 during the year ended December 31, 2020. The implementation had no material impact on the Consolidated Financial Statements and related disclosures.

In January 2021, the FASB issued ASU No. 2021-01, “Reference Rate Reform (Topic 848): Scope.” This standard clarifies that certain optional expedients and exceptions in ASC 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. ASU 2021-01 also amends the expedients and exceptions in ASC 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition. ASU 2021-01 was effective upon issuance and generally can be applied through December 31, 2022. The Partnership adopted ASU 2021-01 during three months ended March 31, 2021. The implementation had no material impact on the Condensed Consolidated Financial Statements and related disclosures.

XML

Revenue

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Revenue

Revenues

The following tables disaggregate total revenues by major source from contracts with customers and the gain (loss) on derivative activity for the three months ended March 31, 2021 and 2020.

	Three Months Ended March 31, 2021
	Gathering and Processing		Transportation and Storage		Eliminations		Total
	(In millions)
Revenues:
Product sales:
Natural gas	$	112	$	330	$	(130)	$	312
Natural gas liquids	297		3		(3)		297
Condensate	32		—		—		32
Total revenues from natural gas, natural gas liquids, and condensate	441		333		(133)		641
Loss on derivative activity	(13)		(1)		—		(14)
Total Product sales	$	428	$	332	$	(133)	$	627
Service revenues:
Demand revenues	$	26	$	127	$	—	$	153
Volume-dependent revenues	170		23		(3)		190
Total Service revenues	$	196	$	150	$	(3)	$	343
Total Revenues	$	624	$	482	$	(136)	$	970

	Three Months Ended March 31, 2020
	Gathering and Processing		Transportation and Storage		Eliminations		Total
	(In millions)
Revenues:
Product sales:
Natural gas	$	56	$	73	$	(60)	$	69
Natural gas liquids	172		2		(2)		172
Condensate	27		—		—		27
Total revenues from natural gas, natural gas liquids, and condensate	255		75		(62)		268
Gain on derivative activity	20		—		—		20
Total Product sales	$	275	$	75	$	(62)	$	288
Service revenues:
Demand revenues	$	39	$	142	$	—	$	181
Volume-dependent revenues	163		17		(1)		179
Total Service revenues	$	202	$	159	$	(1)	$	360
Total Revenues	$	477	$	234	$	(63)	$	648

MRT Rate Case Settlements

In June 2018, MRT filed a general NGA rate case (the 2018 Rate Case), and in October 2019, MRT filed a second rate case (the 2019 Rate Case). MRT began collecting the rates proposed in the 2018 Rate Case, subject to refund, on January 1, 2019. On March 26, 2020, FERC issued an order approving settlements filed in the 2018 Rate Case and the 2019 Rate Case. Upon issuance of the order and approval of the settlement of the MRT rate cases, the Partnership recognized $17 million of revenues from amounts previously held in reserve related to transportation and storage services performed in 2019. In May 2020, $21 million previously held in reserve was refunded to customers, which is inclusive of interest.

Accounts Receivable

The following table summarizes the components of accounts receivable, net of allowance for doubtful accounts.

	March 31, 2021		December 31, 2020
	(In millions)
Accounts Receivable:
Customers	$	272	$	245
Contract assets (1)	21		12
Non-customers	4		6
Total Accounts Receivable (2)	$	297	$	263

____________________

(1)Contract assets reflected in Total Accounts Receivable include accrued minimum volume commitments. Contract assets are primarily attributable to revenues associated with estimated shortfall volumes on certain annual minimum volume commitment arrangements. Total Accounts Receivable does not include contract assets related to firm service transportation contracts with tiered rates of $10 million as of March 31, 2021 and $9 million as of December 31, 2020, which are reflected in Other Assets.

(2)Total Accounts Receivable includes Accounts receivable, net of allowance for doubtful accounts and Accounts receivable—affiliated companies.

Contract Liabilities

Our contract liabilities primarily consist of prepayments received from customers for which the good or service has not yet been provided in connection with the prepayment.

The table below summarizes the change in the contract liabilities.

	March 31, 2021		December 31, 2020
	(In millions)
Deferred revenues, beginning of period (1)	$	44	$	48
Amounts recognized in revenues related to the beginning balance	(17)		(25)
Net additions	16		21
Deferred revenues, end of period (1)	$	43	$	44

____________________

(1)Deferred revenues includes deferred revenue—affiliated companies. This amount is included in Other current liabilities and Other long-term liabilities.

The table below summarizes the timing of recognition of these contract liabilities as of March 31, 2021.

	2021		2022		2023		2024		2025 and After
	(In millions)
Deferred revenues (1)	$	20	$	7	$	7	$	7	$	2

____________________

(1)Deferred revenues includes deferred revenue—affiliated companies. This amount is included in Other current liabilities and Other long-term liabilities.

Remaining Performance Obligations

Our remaining performance obligations consist primarily of firm arrangements and minimum volume commitment arrangements. Upon completion of the performance obligations associated with these arrangements, customers are invoiced and revenue is recognized as Service revenues in the Condensed Consolidated Statements of Income.

The table below summarizes the timing of recognition of the remaining performance obligations as of March 31, 2021.

	2021		2022		2023		2024		2025 and After
	(In millions)
Transportation and Storage	$	325	$	393	$	353	$	266	$	959
Gathering and Processing	93		123		121		101		213
Total remaining performance obligations	$	418	$	516	$	474	$	367	$	1,172

XML

Leases

3 Months Ended

Mar. 31, 2021

Leases [Abstract]

Leases

Leases

The table below summarizes the operating leases included in the Condensed Consolidated Balance Sheets.

	Balance Sheet Location	March 31, 2021		December 31, 2020
		(In millions)
Operating lease asset	Other Assets	$	24	$	25
Total right-of-use assets		$	24	$	25
Operating lease liabilities	Other Current Liabilities	$	4	$	4
Operating lease liabilities	Other Liabilities	23		24
Total lease liabilities		$	27	$	28

As of March 31, 2021, all lease obligations outstanding were classified as operating leases. Therefore, all cash flows are reflected in Cash Flows from Operating Activities.

The following table presents the Partnership’s rental costs associated with field equipment and buildings.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Rental Costs:
Field equipment	$	3	$	5
Office space	1		1

As of March 31, 2021, the weighted average remaining lease term is 6.5 years and the weighted average discount rate is 5.49%.

The following table presents the Partnership’s lease cost.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Lease Cost:
Operating lease cost	$	1	$	2
Short-term lease cost	2		3
Variable lease cost	1		1
Total Lease Cost	$	4	$	6

The Partnership recorded no short-term lease costs in the transportation and storage reportable segment during the three months ended March 31, 2021 and 2020. All lease costs were included in the gathering and processing reportable segment.

Under ASC 842, as of March 31, 2021, the Partnership has operating lease obligations expiring at various dates. Undiscounted cash flows for operating lease liabilities are as follows:

	Non-cancellable operating leases
	(In millions)
Year Ending December 31,
2021 - remainder	$	4
2022	5
2023	6
2024	4
2025	3
2026	2
After 2026	6
Total	30
Less: impact of the applicable discount rate	3
Total lease liabilities	$	27

XML

Earnings Per Limited Partner Unit

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Earnings Per Limited Partner Unit

Earnings Per Limited Partner Unit

The following table illustrates the Partnership’s calculation of earnings per unit for common units.

	Three Months Ended March 31,
	2021		2020
	(In millions, except per unit data)
Net income	$	165	$	105
Net income (loss) attributable to noncontrolling interest	1		(7)
Series A Preferred Unit distributions	9		9
Net income available to common units	$	155	$	103
Net income allocable to common units	$	155	$	103
Dilutive effect of Series A Preferred Unit distributions	9		9
Diluted net income allocable to common units	$	164	$	112
Basic weighted average number of common units outstanding (1)	438		437
Dilutive effect of Series A Preferred Units	57		144
Dilutive effect of performance units (2)	—		—
Diluted weighted average number of common units outstanding	495		581
Basic and diluted earnings per unit
Basic	$	0.35	$	0.24
Diluted	$	0.33	$	0.19

____________________

(1)Basic weighted average number of outstanding common units includes approximately two million time-based phantom units for each of the three months ended March 31, 2021 and 2020.

(2)The dilutive effect of the performance unit awards was less than $0.01 per unit during the three months ended March 31, 2021 and 2020.

XML

Partners' Equity

3 Months Ended

Mar. 31, 2021

Equity [Abstract]

Partners' Equity

Partners’ Equity

The Partnership Agreement requires that, within 60 days after the end of each quarter, the Partnership distribute all of its available cash (as defined in the Partnership Agreement) to unitholders of record on the applicable record date.

The Partnership paid or has authorized payment of the following cash distributions to common unitholders, as applicable, during 2021 and 2020 (in millions, except for per unit amounts):

Three Months Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2021(1)	May 13, 2021	May 25, 2021	$	0.16525	$	72
December 31, 2020	February 22, 2021	March 1, 2021	0.16525		72
September 30, 2020	November 17, 2020	November 24, 2020	0.16525		72
June 30, 2020	August 18, 2020	August 25, 2020	0.16525		72
March 31, 2020	May 19, 2020	May 27, 2020	0.16525		72

_____________________

(1)The Board of Directors declared a $0.16525 per common unit cash distribution on April 26, 2021, to be paid on May 25, 2021 to common unitholders of record at the close of business on May 13, 2021.

Holders of the Series A Preferred Units receive a quarterly cash distribution on a non-cumulative basis if and when declared by the General Partner, and subject to certain adjustments, equal to an annual rate of 10% on the stated liquidation preference of $25.00 from the date of original issue, February 18, 2016, to, but not including, the five-year anniversary of the original issue date, February 18, 2021. Thereafter, the holders receive a quarterly cash distribution based on a percentage of the stated liquidation preference equal to the sum of the three-month LIBOR plus 8.5%, which was 8.7375% for the relevant days in the three months ended March 31, 2021.

The Partnership paid or has authorized payment of the following cash distributions to holders of the Series A Preferred Units during 2021 and 2020 (in millions, except for per unit amounts):

Three Months Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2021(1)	April 26, 2021	May 14, 2021	$	0.5873	$	9
December 31, 2020	February 12, 2021	February 12, 2021	0.625		9
September 30, 2020	November 3, 2020	November 13, 2020	0.625		9
June 30, 2020	August 4, 2020	August 14, 2020	0.625		9
March 31, 2020	May 5, 2020	May 15, 2020	0.625		9

_____________________

(1)The Board of Directors declared a $0.5873 per Series A Preferred Unit cash distribution on April 26, 2021, to be paid on May 14, 2021, to Series A Preferred unitholders of record at the close of business on April 26, 2021.

XML

Impairment of Property, Plant and Equipment and Goodwill

3 Months Ended

Mar. 31, 2021

Impairment of Property, Plant and Equipment and Goodwill [Abstract]

Impairment of Property, Plant and Equipment and Goodwill [Text Block]

(7) Impairments of Property, Plant and Equipment and Goodwill

Impairment of Property, Plant and Equipment

The Partnership periodically evaluates property, plant and equipment for impairment when events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. The determination of whether an impairment has occurred is based on an estimate of undiscounted cash flows attributable to the assets, as compared to the carrying value of the assets. Due to decreases in natural gas and NGL market prices during 2020 as a result of the ongoing COVID-19 pandemic and the economic effects of the pandemic, together with the dispute over crude oil production levels between Russia and members of OPEC led by Saudi Arabia, as of March 31, 2020, management reassessed the carrying value of the Atoka assets, in which the Partnership owns a 50% interest in the consolidated joint venture, which is a component of the gathering and processing segment. Based on forecasted future undiscounted cash flows, management determined that the carrying value of the Atoka assets were not fully recoverable. The Partnership utilized the income approach (generally accepted valuation approach) to estimate the fair value of these assets. The primary inputs were forecasted cash flows and the discount rate. The fair value measurement is based on inputs that are not observable in the market and thus represent Level 3 inputs. Applying a discounted cash flow model to the property, plant and equipment, the Partnership recognized a $16 million impairment, which is included in Impairments of property, plant and equipment and goodwill on the Condensed Consolidated Statements of Income during the three months ended March 31, 2020.

Impairment of Goodwill

In the fourth quarter of 2017, as a result of the acquisition of ETGP, the Partnership recorded $12 million of goodwill associated with the Ark-La-Tex Basin reporting unit, included in the gathering and processing reportable segment.

The Partnership tests its goodwill for impairment annually on October 1st, or more frequently if events or changes in circumstances indicate that the carrying value of goodwill may not be recoverable. Goodwill is assessed for impairment by comparing the fair value of the reporting unit with its book value, including goodwill. During 2020, the commodity price declines due to the existing oversupply of crude oil, NGLs and natural gas were exacerbated by the ongoing COVID-19 pandemic and the economic effects of the pandemic, in addition to the dispute over crude oil production levels between Russia and members of OPEC led by Saudi Arabia in the first quarter. Despite the subsequent agreement in April 2020 by a coalition of nations including Russia and Saudi Arabia to reduce production of crude oil, the price of NGLs and crude oil had remained significantly lower than pre-pandemic levels. Amid such crude oil, NGL and natural gas price declines, producers had been cutting back spending and shifting their focus from emphasizing reserves growth, to increasing net cash flows and reducing outstanding debt, which consequently resulted in a decrease in rig count and in forecasted producer activity in the Ark-La-Tex Basin reporting unit during the first quarter of 2020. At the same time, unit prices and market multiples for midstream companies with gathering and processing operations had dropped to their lowest levels in the last three years. Due to the continuing decrease in forward commodity prices, the reduction in forecasted producer activities, the resulting decrease in our forecasted cash flows and the increase in the weighted average cost of capital, the Partnership determined that the fair value of the goodwill associated with our Ark-La-Tex Basin reporting unit would more likely than not be impaired. As a result, the Partnership performed a quantitative test for our goodwill and determined that the carrying value of the Ark-La-Tex Basin reporting unit exceeded its fair value and that goodwill associated with the Ark-La-Tex Basin was completely impaired in the amount of $12 million. The impairment is included in Impairments of property, plant and equipment and goodwill on the Condensed Consolidated Statements of Income for the three months ended March 31, 2020. The Partnership had no goodwill recorded as of March 31, 2021 and December 31, 2020.

XML

Investment in Equity Method Affiliate

3 Months Ended

Mar. 31, 2021

Equity Method Investments and Joint Ventures [Abstract]

Investment in Equity Method Affiliate

Investment in Equity Method Affiliate

The Partnership uses the equity method of accounting for investments in entities in which it has an ownership interest between 20% and 50% and exercises significant influence.

SESH is owned 50% by Enbridge, Inc. and 50% by the Partnership. Pursuant to the terms of the SESH LLC Agreement, if, at any time, CenterPoint Energy has a right to receive less than 50% of our distributions through its interest in the Partnership and its economic interest in Enable GP, or does not have the ability to exercise certain control rights, Enbridge, Inc. may, under certain circumstances, have the right to purchase the Partnership’s interest in SESH at fair market value, subject to certain exceptions.

The Partnership shares operations of SESH with Enbridge, Inc. under service agreements. The Partnership is responsible for the field operations of SESH. SESH reimburses each party for actual costs incurred, which are billed based upon a combination of direct charges and allocations. The Partnership billed SESH $2 million and $6 million during the three months ended March 31, 2021 and 2020, respectively, associated with these service agreements.

The Partnership includes equity in earnings of equity method affiliate, net under the Other Income (Expense) caption in the Condensed Consolidated Statements of Income. The following table presents the amount of Equity in earnings of equity method affiliate recognized and Distributions from equity method affiliate received.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Equity in earnings of equity method affiliate	$	1	$	6
Distributions from equity method affiliate (1)	4		10

___________________

(1)Distributions from equity method affiliate includes a $1 million and $6 million return on investment and a $3 million and $4 million return of investment for the three months ended March 31, 2021 and 2020, respectively.

The following table includes the summarized financial information of SESH.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Income Statements:
Revenues	$	15	$	27
Operating income	4		16
Net income (loss)	(1)		11

XML

Debt

3 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Debt

Debt

The following table presents the Partnership’s outstanding debt.

	March 31, 2021						December 31, 2020
	Outstanding Principal		Discount (1)		Total Debt		Outstanding Principal		Discount (1)		Total Debt
	(In millions)
Commercial Paper	$	214	$	—	$	214	$	250	$	—	$	250
2019 Term Loan Agreement	800		—		800		800		—		800
2024 Notes	600		—		600		600		—		600
2027 Notes	700		(2)		698		700		(2)		698
2028 Notes	800		(4)		796		800		(5)		795
2029 Notes	547		(1)		546		547		(1)		546
2044 Notes	531		—		531		531		—		531
Total debt	$	4,192	$	(7)	$	4,185	$	4,228	$	(8)	$	4,220
Less: Short-term debt (2)					214						250
Less: Current portion of long-term debt (3)					800						—
Less: Unamortized debt expense (4)					19						19
Total long-term debt					$	3,152					$	3,951

____________________

(1)Unamortized discount on long-term debt is amortized over the life of the respective debt.

(2)Short-term debt includes $214 million and $250 million of outstanding commercial paper as of March 31, 2021 and December 31, 2020, respectively.

(3)As of March 31, 2021, Current portion of long-term debt included $800 million outstanding balance of the 2019 Term Loan Agreement.

(4)As of both March 31, 2021 and December 31, 2020, there was an additional $3 million of unamortized debt expense related to the Revolving Credit Facility included in Other assets, not included above.

Commercial Paper

The Partnership has a commercial paper program, pursuant to which the Partnership is authorized to issue up to $1.4 billion of commercial paper. The commercial paper program is supported by our Revolving Credit Facility, and outstanding commercial paper effectively reduces our borrowing capacity thereunder. There were $214 million and $250 million outstanding under our commercial paper program at March 31, 2021 and December 31, 2020, respectively. As of March 31, 2021, the weighted average interest rate for the outstanding commercial paper was 0.73%.

Revolving Credit Facility

The Partnership’s Revolving Credit Facility is a $1.75 billion, five-year senior unsecured revolving credit facility, which under certain circumstances may be increased from time to time up to an additional $875 million. The Revolving Credit Facility is scheduled to mature on April 6, 2023, subject to an extension option, which could be exercised two times to extend the term of the Revolving Credit Facility, in each case, for an additional one-year term. As of March 31, 2021, there were no principal advances, $3 million letters of credit outstanding and our available borrowing capacity was approximately $980 million under our Revolving Credit Facility.

The Revolving Credit Facility provides that outstanding borrowings bear interest at the LIBOR and/or an alternate base rate, at the Partnership’s election, plus an applicable margin. The applicable margin is based on the Partnership’s designated credit ratings from S&P, Moody’s and Fitch Ratings. As of March 31, 2021, the applicable margin for LIBOR-based borrowings under the Revolving Credit Facility was 1.50% based on the Partnership’s credit ratings. In addition, the Revolving Credit Facility requires the Partnership to pay a fee on unused commitments. The commitment fee is based on the Partnership’s credit ratings. As of March 31, 2021, the commitment fee under the restated Revolving Credit Facility was 0.20% per annum based on the Partnership’s credit ratings. The commitment fee is recorded as interest expense in the Partnership’s Condensed Consolidated Statements of Income.

2019 Term Loan Agreement

On January 29, 2019, the Partnership entered into an unsecured term loan agreement with Bank of America, N.A., as administrative agent, and the several lenders thereto. As of March 31, 2021, there was $800 million outstanding under the 2019 Term Loan Agreement. The 2019 Term Loan Agreement has a scheduled maturity date of January 29, 2022, but contains an option, which may be exercised up to two times, to extend the maturity date for an additional one-year term. The 2019 Term Loan Agreement provides that outstanding borrowings bear interest at the eurodollar rate and/or an alternate base rate, at the Partnership’s election, plus an applicable margin. The applicable margin is based on the Partnership’s credit ratings. The applicable margin shall equal, (1) in the case of interest rates determined by reference to the eurodollar rate, between 0.75% and 1.50% per annum and (2) in the case of interest rates determined by reference to the alternate base rate, between 0% and 0.50% per annum. As of March 31, 2021, the applicable margin for LIBOR-based advances under the 2019 Term Loan Facility was 1.25% based on the Partnership’s credit ratings. As of March 31, 2021, the weighted average interest rate of the 2019 Term Loan Agreement was 2.08%, including the impact of the associated interest rate derivatives designated as hedging instruments for accounting purposes.

Senior Notes

As of March 31, 2021, the Partnership’s debt included the 2024 Notes, 2027 Notes, 2028 Notes, 2029 Notes and 2044 Notes, which had $7 million of unamortized discount and $19 million of unamortized debt expense at March 31, 2021, resulting in effective interest rates of 4.01%, 4.56%, 5.19%, 4.30% and 5.08%, respectively, during the three months ended March 31, 2021. In March 2020, the Partnership’s EOIT Senior Notes matured and were paid using proceeds from the Revolving Credit Facility.

As of March 31, 2021, the Partnership was in compliance with all of its debt agreements, including financial covenants.

XML

Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

Derivative Instruments and Hedging Activities

The primary risks managed using derivative instruments are commodity price and interest rate risks.

Derivatives Not Designated as Hedging Instruments

Derivative instruments not designated as hedging instruments for accounting purposes are utilized to manage the Partnership’s exposure to commodity price risk. For derivative instruments not designated as hedging instruments, the gain or loss on the derivative is recognized currently in earnings.

Quantitative Disclosures Related to Derivative Instruments Not Designated as Hedging Instruments

The following table presents the Partnership’s derivative instruments that were not designated as hedging instruments for accounting purposes.

	March 31, 2021		December 31, 2020
	Gross Notional Volume
	Purchases	Sales	Purchases	Sales
Natural gas— TBtu (1)
Financial fixed futures/swaps	1	17	—	18
Financial basis futures/swaps	1	34	—	27
Financial swaptions (2)	—	5	—	7
Crude oil (for condensate)— MBbl (3)
Financial futures/swaps	—	420	—	465
Financial swaptions (2)	—	150	—	90
Natural gas liquids— MBbl (4)
Financial futures/swaps	435	1,155	855	1,210
Financial options	—	30	—	45

____________________

(1)As of March 31, 2021, 99.2% of the natural gas contracts had durations of one year or less and 0.8% had durations of more than one year and less than two years. As of December 31, 2020, 95.7% of the natural gas contracts had durations of one year or less and 4.3% had durations of more than one year and less than two years.

(2)The notional volume contains a combined derivative instrument consisting of a fixed price swap and a sold option, which gives the counterparties the right, but not the obligation, to increase the notional volume hedged under the fixed price swap until the option expiration date. The notional volume represents the volume prior to option exercise.

(3)As of March 31, 2021, 89.5% of the crude oil (for condensate) contracts had durations of one year or less and 10.5% had durations of more than one year and less than two years. As of December 31, 2020, 100.0% of the crude oil (for condensate) contracts had durations of one year or less.

(4)As of March 31, 2021, 97.2% of the natural gas liquids contracts had durations of one year or less and 2.8% had durations of more than one year and less than two years. As of December 31, 2020, 100.0% of the natural gas liquids contracts had durations of one year or less.

Derivatives Designated as Hedging Instruments

Derivative instruments designated as hedging instruments for accounting purposes are utilized in managing the Partnership’s interest rate risk exposures.

Quantitative Disclosures Related to Derivative Instruments Designated as Hedging Instruments

The following table presents the Partnership’s derivative instruments that were designated as hedging instruments for accounting purposes.

	March 31, 2021		December 31, 2020
	Gross Notional Value
	(In millions)
Interest rate swaps	$	300	$	300

Balance Sheet Presentation Related to Derivative Instruments

The following table presents the fair value of the derivative instruments that are included in the Partnership’s Condensed Consolidated Balance Sheets that were not designated as hedging instruments for accounting purposes.

		March 31, 2021				December 31, 2020
		Fair Value
Instrument	Balance Sheet Location	Assets		Liabilities		Assets		Liabilities
		(In millions)
Natural gas
Financial futures/swaps	Other Current	$	1	$	3	$	2	$	2
Financial swaptions	Other Current	1		2		1		2
Crude oil (for condensate)
Financial futures/swaps	Other Current	—		10		1		13
Financial swaptions	Other Current	—		1		—		—
Natural gas liquids
Financial futures/swaps	Other Current	9		6		15		3
Financial swaptions	Other Current	—		1		—		1
Total gross commodity derivatives (1)		$	11	$	23	$	19	$	21

_____________________

(1)See Note 11 for a reconciliation of the Partnership’s commodity derivatives fair value to the Partnership’s Condensed Consolidated Balance Sheets as of March 31, 2021 and December 31, 2020.

The following table presents the fair value of the derivative instruments that are included in the Partnership’s Condensed Consolidated Balance Sheets that were designated as hedging instruments for accounting purposes.

		March 31, 2021				December 31, 2020
		Fair Value
Instrument	Balance Sheet Location	Assets		Liabilities		Assets		Liabilities
		(In millions)
Interest rate swaps (1)	Other Current	$	—	$	5	$	—	$	6

_____________________

(1)All interest rate derivative instruments that were designated as cash flow hedges are considered Level 2 as of March 31, 2021 and December 31, 2020.

Income Statement Presentation Related to Derivative Instruments

The following table presents the effect of derivative instruments on the Partnership’s Condensed Consolidated Statements of Income.

	Amounts Recognized in Income
	Three Months Ended March 31,
	2021		2020
	(In millions)
Natural gas
Financial futures/swaps gains (losses)	$	(2)	$	4
Financial swaptions losses	—		(1)
Physical purchases/sales gains	—		1
Crude oil (for condensate)
Financial futures/swaps gains (losses)	(6)		19
Financial swaptions gains (losses)	(1)		4
Natural gas liquids
Financial futures/swaps losses	(5)		(7)
Total	$	(14)	$	20

For derivatives not designated as hedges in the tables above, amounts recognized in income for the periods ended March 31, 2021 and 2020, if any, are reported in Product sales.

The following table presents the components of gain (loss) on derivative activity in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Change in fair value of commodity derivatives	$	(10)	$	10
Realized gain (loss) on commodity derivatives	(4)		10
Gain (loss) on commodity derivative activity	$	(14)	$	20

The following table presents the effect of derivative instruments that were designated as hedging instruments on the Partnership’s Condensed Consolidated Statements of Income.

	Amounts Recognized in Income
	Three Months Ended March 31,
	2021		2020
	(In millions)
Interest rate swaps losses	$	(1)	$	—

Interest rate derivatives designated as hedges are recognized in income once settled. Settlement amounts recognized in income for the periods ended March 31, 2021 and 2020 are reported in Interest expense.

Credit-Risk Related Contingent Features in Derivative Instruments

In the event Moody’s or S&P were to lower the Partnership’s senior unsecured debt rating to a below investment grade rating, the Partnership could be required to provide additional credit assurances to third parties, which could include letters of credit or cash collateral to satisfy its obligation under its financial and physical contracts relating to derivative instruments that are in a net liability position. As of March 31, 2021, under these obligations, the Partnership had posted no cash collateral related to natural gas swaps and swaptions, crude oil swaps and swaptions and NGL swaps and $1 million of additional collateral would be required to be posted by the Partnership in the event of a credit ratings downgrade to a below investment grade rating. In certain situations where the Partnership’s credit rating is lowered by Moody’s or S&P, the Partnership could be subject to an early termination event related to certain derivative instruments, which could result in a cash settlement of the instruments at market values on the date of such early termination.

XML

Fair Value Measurements

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

Certain assets and liabilities are recorded at fair value in the Condensed Consolidated Balance Sheets and are categorized based upon the level of judgment associated with the inputs used to measure their value. The Partnership determines the appropriate level for each financial asset and liability on a quarterly basis and recognizes transfers between levels at the end of the reporting period. For the three months ended March 31, 2021, there were no transfers between levels. As of March 31, 2021, there were no contracts classified as Level 3.

Estimated Fair Value of Financial Instruments

The fair values of all accounts receivable, notes receivable, accounts payable, commercial paper and other such financial instruments on the Condensed Consolidated Balance Sheets are estimated to be approximately equivalent to their carrying amounts due to their short-term nature and have been excluded from the table below.

The following table summarizes the fair value and carrying amount of the Partnership’s financial instruments.

	March 31, 2021				December 31, 2020
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(In millions)
Debt
Revolving Credit Facility (Level 2) (1)	$	—	$	—	$	—	$	—
2019 Term Loan Agreement (Level 2)	800		800		800		800
2024 Notes (Level 2)	600		639		600		612
2027 Notes (Level 2)	698		758		698		709
2028 Notes (Level 2)	796		884		795		817
2029 Notes (Level 2)	546		568		546		544
2044 Notes (Level 2)	531		527		531		499

____________________

(1)    Borrowing capacity is effectively reduced by our borrowings outstanding under the commercial paper program. $214 million and $250 million of commercial paper was outstanding as of March 31, 2021 and December 31, 2020, respectively.

The fair value of the Partnership’s Revolving Credit Facility, 2019 Term Loan Agreement, 2024 Notes, 2027 Notes, 2028 Notes, 2029 Notes, and 2044 Notes is based on quoted market prices and estimates of current rates available for similar issues with similar maturities and is classified as Level 2 in the fair value hierarchy.

Non-Financial Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Certain assets and liabilities are measured at fair value on a nonrecurring basis; that is, the assets and liabilities are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (e.g., when there is evidence of impairment). As of March 31, 2021, no material fair value adjustments or fair value measurements were required for these non-financial assets or liabilities.

Based upon review of forecast undiscounted cash flows as of March 31, 2021, all of the asset groups were considered recoverable. Based upon review for other than temporary declines in fair value, the investment in equity method affiliate was considered recoverable. Future price declines, throughput declines, contracted capacity declines, cost increases, regulatory or political environment changes and other changes in market conditions, including the oversupply of crude oil, NGLs and natural gas as well as the ongoing COVID-19 pandemic and the economic effects of the pandemic, could reduce forecast undiscounted cash flows for the asset groups and result in other than temporary declines in the fair value of the investment in equity method affiliate.

Contracts with Master Netting Arrangements

As of March 31, 2021, the Partnership’s Level 2 interest rate derivatives are recorded as liabilities with no netting adjustments.

The following tables summarize the Partnership’s other assets and liabilities that are measured at fair value on a recurring basis. 

March 31, 2021	Commodity Contracts				Gas Imbalances (1)
	Assets		Liabilities		Assets (2)		Liabilities (3)
	(In millions)
Quoted market prices in active market for identical assets (Level 1)	$	1	$	10	$	—	$	—
Significant other observable inputs (Level 2)	10		13		30		10
Total fair value	11		23		30		10
Netting adjustments	(11)		(11)		—		—
Total	$	—	$	12	$	30	$	10

December 31, 2020	Commodity Contracts				Gas Imbalances (1)
	Assets		Liabilities		Assets (2)		Liabilities (3)
	(In millions)
Quoted market prices in active market for identical assets (Level 1)	$	2	$	14	$	—	$	—
Significant other observable inputs (Level 2)	17		7		23		16
Total fair value	19		21		23		16
Netting adjustments	(19)		(19)		—		—
Total	$	—	$	2	$	23	$	16

______________________

(1)The Partnership uses the market approach to fair value its gas imbalance assets and liabilities at individual, or where appropriate an average of, current market indices applicable to the Partnership’s operations, not to exceed net realizable value. There were no netting adjustments as of March 31, 2021 and December 31, 2020.

(2)Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $19 million and $19 million at March 31, 2021 and December 31, 2020, respectively, which fuel reserves are based on the value of natural gas at the time the imbalance was created, and which are not subject to revaluation at fair market value.

(3)Gas imbalance liabilities exclude fuel reserves for over retained fuel due to shippers of $3 million and $3 million at March 31, 2021 and December 31, 2020, respectively, which fuel reserves are based on the value of natural gas at the time the imbalance was created, and which are not subject to revaluation at fair market value.

XML

Supplemental Disclosure of Cash Flow Information

3 Months Ended

Mar. 31, 2021

Supplemental Cash Flow Information [Abstract]

Supplemental Disclosure of Cash Flow Information

Supplemental Disclosure of Cash Flow Information

The following table provides information regarding supplemental cash flow information:

	Three Months Ended March 31,
	2021		2020
	(In millions)
Supplemental Disclosure of Cash Flow Information:
Cash Payments:
Interest, net of capitalized interest	$	32	$	43
Income taxes, net of refunds	(2)		—
Non-cash transactions:
Accounts payable related to capital expenditures	7		8
Lease liabilities related to derecognition of right-of-use assets	—		(4)
Impact of adoption of financial instruments-credit losses accounting standard (Note 1)	—		(3)

XML

Related Party Transactions

3 Months Ended

Mar. 31, 2021

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

The Partnership’s revenues from affiliated companies accounted for 7% and 8% of total revenues during the three months ended March 31, 2021 and 2020, respectively. The following table presents the amounts of revenues from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Gas transportation and storage service revenues — CenterPoint Energy	$	27	$	37
Gas transportation and storage service revenues — OGE Energy	10		9
Natural gas product sales — OGE Energy	31		5
Total revenues — affiliated companies	$	68	$	51

The following table presents the amounts of natural gas purchased from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Cost of natural gas purchases — CenterPoint Energy	$	—	$	1
Cost of natural gas purchases — OGE Energy	31		8
Total cost of natural gas purchases — affiliated companies	$	31	$	9

Corporate services and seconded employees

The Partnership receives services and support functions from each of CenterPoint Energy and OGE Energy under services agreements for an initial term that ended on April 30, 2016. The services agreements automatically extend year-to-year at the end of the initial term, unless terminated by the Partnership with at least 90 days’ notice prior to the end of any extension. Additionally, the Partnership may terminate the services agreements at any time with 180 days’ notice, if approved by the Board of Enable GP. The Partnership reimburses CenterPoint Energy and OGE Energy for these services up to annual caps, which for 2021 are both less than $1 million.

As of March 31, 2021, the Partnership had certain employees who are participants under OGE Energy’s defined benefit and retiree medical plans, who will remain seconded to the Partnership, subject to certain termination rights of the Partnership and OGE Energy. The Partnership’s reimbursement of OGE Energy for seconded employee costs arising out of OGE Energy’s defined benefit and retiree medical plans is fixed at actual cost subject to an annual cap of $5 million until secondment is terminated.

The following table presents the amounts charged to the Partnership by affiliates for seconded employees, included primarily in Operation and maintenance and General and administrative expenses in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Seconded Employee Costs — OGE Energy	$	4	$	3

XML

Commitments and Contingencies

3 Months Ended

Mar. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

The Partnership is involved in legal, environmental, tax and regulatory proceedings before various courts, regulatory commissions and governmental agencies regarding matters arising in the ordinary course of business. Some of these proceedings involve substantial amounts. The Partnership regularly analyzes current information and, as necessary, provides accruals for probable liabilities on the eventual disposition of these matters. The Partnership does not expect the disposition of these matters to have a material adverse effect on its financial condition, results of operations or cash flows.

On January 1, 2017, the Partnership entered into a 10-year gathering and processing agreement, which became effective on July 1, 2018, with an affiliate of Energy Transfer for deliveries to the Godley Plant in Johnson County, Texas. As of March 31, 2021, the Partnership estimates the remaining associated minimum volume commitment fee to be $164 million. Minimum volume commitment fees are expected to be $15 million for the remainder of 2021, $23 million per year from 2022 through 2027 and $11 million in 2028.

On September 13, 2018, the Partnership executed a precedent agreement for the development of the Gulf Run Pipeline, an interstate natural gas transportation project. On January 30, 2019, a final investment decision was made by Golden Pass LNG, the cornerstone shipper for the liquefied natural gas facility to be served by the Gulf Run Pipeline project. Subject to approval of the project by FERC, the Partnership will be required to construct a large-diameter pipeline from northern Louisiana to Gulf Coast markets. In addition, the Partnership requested approval to transfer existing EGT transportation infrastructure to the Gulf Run Pipeline. The Partnership filed applications with FERC to obtain authorization to construct and operate the pipeline on February 28, 2020. FERC issued the environmental assessment on October 29, 2020. The Partnership estimates the cost to complete the Gulf Run Pipeline project would be as much as $540 million. The project is backed by a 20-year firm transportation service agreement. The Gulf Run Pipeline connects natural gas producing regions in the U.S., including the

Haynesville, Marcellus, Utica and Barnett shales and the Mid-Continent region. The project is expected to be placed into service in late 2022.

XML

Equity-Based Compensation

3 Months Ended

Mar. 31, 2021

Share-based Payment Arrangement [Abstract]

Equity-Based Compensation

Equity-Based Compensation

The following table summarizes the Partnership’s equity-based compensation expense related to performance units and phantom units for the Partnership’s employees and independent directors.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Performance units	$	2	$	2
Phantom units	2		2
Total compensation expense	$	4	$	4

The following table presents the assumptions related to the performance units granted in 2021.

	2021
Number of units granted	1,453,897
Fair value of units granted	$	10.26
Expected distribution yield	12.90		%
Expected price volatility	100.00		%
Risk-free interest rate	0.27		%
Expected life of units (in years)	3

The following table presents the number of phantom units granted and the grant date fair value related to the phantom units granted in 2021.

	2021
Phantom Units granted	1,356,672
Fair value of phantom units granted	$5.41 - $6.87

Units Outstanding

A summary of the activity for the Partnership’s performance units and phantom units applicable to the Partnership’s employees at March 31, 2021 and changes during 2021 are shown in the following table.

	Performance Units				Phantom Units
	Number of Units		Weighted Average Grant-Date Fair Value, Per Unit		Number of Units		Weighted Average Grant-Date Fair Value, Per Unit
	(In millions, except unit data)
Units outstanding at December 31, 2020	1,765,508		$	13.10	1,790,845		$	10.29
Granted (1)	1,453,897		10.26		1,356,672		6.86
Vested (2)	(389,817)		17.70		(461,824)		13.11
Forfeited	(32,625)		10.00		(94,669)		8.70
Units outstanding at March 31, 2021	2,796,963		$	11.02	2,591,024		$	8.05
Aggregate intrinsic value of units outstanding at March 31, 2021	$	18			$	17

_____________________

(1)Performance units represents the target number of performance units granted. The actual number of performance units earned, if any, is dependent upon performance and may range from 0% to 200% of the target.

(2)Performance units vested as of March 31, 2021 include 389,817 units from the 2018 annual grant, which were approved by the Board of Directors in 2018 and, based on the level of achievement of a performance goal established by the Board of Directors over the performance period of January 1, 2018 through December 31, 2020, no performance units vested.

Unrecognized Compensation Cost

The following table summarizes the Partnership’s unrecognized compensation cost for its non-vested performance units and phantom units, and the weighted-average periods over which the compensation cost is expected to be recognized.

	March 31, 2021
	Unrecognized Compensation Cost (In millions)		Weighted Average Period for Recognition (In years)
Performance Units	$	21	2.25
Phantom Units	14		2.07
Total	$	35

As of March 31, 2021, there were 3,105,706 units available for issuance under the long-term incentive plan.

XML

Reportable Segments

3 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Reportable Segments

Reportable Segments

The Partnership’s determination of reportable segments considers the strategic operating units under which it manages sales, allocates resources and assesses performance of various products and services to customers in differing regulatory environments. The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies excerpt in the Partnership’s audited 2020 Notes to Consolidated Financial Statements included in the Annual Report. The Partnership uses operating income as the measure of profit or loss for its reportable segments.

The Partnership’s assets and operations are organized into two reportable segments: (i) gathering and processing and (ii) transportation and storage. Our gathering and processing segment primarily provides natural gas gathering and processing services to our producer customers and crude oil, condensate and produced water gathering services to our producer and refiner customers. The transportation and storage segment provides interstate and intrastate natural gas pipeline transportation and storage services primarily to our producer, power plant, LDC and industrial end-user customers.

Financial data for reportable segments are as follows:

Three Months Ended March 31, 2021	Gathering and Processing		Transportation (1) and Storage		Eliminations		Total
	(In millions)
Product sales	$	428	$	332	$	(133)	$	627
Service revenues	196		150		(3)		343
Total Revenues	624		482		(136)		970
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	398		257		(136)		519
Operation and maintenance, General and administrative	79		42		—		121
Depreciation and amortization	74		32		—		106
Taxes other than income tax	11		7		—		18
Operating income	$	62	$	144	$	—	$	206
Total Assets	$	10,780	$	5,789	$	(4,805)	$	11,764
Capital expenditures	$	21	$	59	$	—	$	80
Three Months Ended March 31, 2020	Gathering and Processing		Transportation (1) and Storage		Eliminations		Total
	(In millions)
Product sales	$	275	$	75	$	(62)	$	288
Service revenues	202		159		(1)		360
Total Revenues	477		234		(63)		648
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	211		78		(63)		226
Operation and maintenance, General and administrative	81		45		—		126
Depreciation and amortization	74		30		—		104
Impairments of property, plant and equipment and goodwill	28		—		—		28
Taxes other than income tax	11		7		—		18
Operating income	$	72	$	74	$	—	$	146
Total assets as of December 31, 2020	$	10,830	$	5,729	$	(4,830)	$	11,729
Capital expenditures	$	34	$	20	$	—	$	54

_____________________

(1)See Note 8 for discussion regarding ownership interests in SESH and related equity earnings included in the transportation and storage segment for the three months ended March 31, 2021 and 2020.

^[1]

[1] See Note 8 for discussion regarding ownership interests in SESH and related equity earnings included in the transportation and storage segment for the three months ended March 31, 2021 and 2020.

XML

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

Organization

Enable Midstream Partners, LP (the Partnership) is a Delaware limited partnership whose assets and operations are organized into two reportable segments: (i) gathering and processing and (ii) transportation and storage. Our gathering and processing segment primarily provides natural gas gathering and processing services to our producer customers and crude oil, condensate and produced water gathering services to our producer and refiner customers. The transportation and storage segment provides interstate and intrastate natural gas pipeline transportation and storage services primarily to our producer, power plant, LDC and industrial end-user customers. Our natural gas gathering and processing assets are primarily located in Oklahoma, Texas, Arkansas and Louisiana and serve natural gas production in the Anadarko, Arkoma and Ark-La-Tex Basins. Crude oil gathering assets are located in Oklahoma and serve crude oil production in the SCOOP and STACK plays of the Anadarko Basin and in North Dakota and serve crude oil production in the Bakken Shale formation of the Williston Basin. The Partnership’s natural gas transportation and storage assets consist primarily of an interstate pipeline system extending from western Oklahoma and the Texas Panhandle to Louisiana, an interstate pipeline system extending from Louisiana to Illinois, an intrastate pipeline system in Oklahoma, and our investment in SESH, a pipeline extending from Louisiana to Alabama.

CenterPoint Energy and OGE Energy each have 50% of the management interests in Enable GP. Enable GP is the general partner of the Partnership and has no other operating activities. Enable GP is governed by a board made up of two representatives designated by each of CenterPoint Energy and OGE Energy, along with the Partnership’s Chief Executive Officer and three independent board members CenterPoint Energy and OGE Energy mutually agreed to appoint. CenterPoint Energy and OGE Energy also own a 40% and 60% interest, respectively, in the incentive distribution rights held by Enable GP.

As of March 31, 2021, CenterPoint Energy held approximately 53.7% or 233,856,623 of the Partnership’s common units, and OGE Energy held approximately 25.5% or 110,982,805 of the Partnership’s common units. Additionally, CenterPoint Energy holds 14,520,000 Series A Preferred Units. The limited partner interests of the Partnership have limited voting rights on matters affecting the business. As such, limited partners do not have rights to elect the Partnership’s general partner on an annual or continuing basis and may not remove Enable GP, its current general partner, without at least a 75% vote by all unitholders, including all units held by the Partnership’s limited partners, and Enable GP and its affiliates, voting together as a single class.

As of March 31, 2021, the Partnership owned a 50% interest in SESH. See Note 8 for further discussion of SESH. For the three months ended March 31, 2021, the Partnership owned a 50% ownership in Atoka and consolidated Atoka in the accompanying Condensed Consolidated Financial Statements as EOIT acted as the managing member of Atoka and had control over the operations of Atoka. In addition, the Partnership held a 60% interest in ESCP, which is consolidated in the accompanying Condensed Consolidated Financial Statements as EOCS acted as the managing member of ESCP and had control over the operations of ESCP.

Basis of Presentation

Basis of Presentation

The accompanying Condensed Consolidated Financial Statements and related notes of the Partnership have been prepared pursuant to the rules and regulations of the SEC and GAAP. Pursuant to such rules and regulations, certain disclosures normally included in financial statements prepared in accordance with GAAP have been omitted. The accompanying Condensed Consolidated Financial Statements and related notes should be read in conjunction with the Consolidated Financial Statements and related notes included in our Annual Report.

The Condensed Consolidated Financial Statements and the related notes reflect all normal recurring adjustments that are, in the opinion of management, necessary to present fairly the financial position and results of operations for the respective periods. Amounts reported in the Partnership’s Condensed Consolidated Statements of Income are not necessarily indicative of amounts expected for a full-year period due to the effects of, among other things, (a) seasonal fluctuations in demand for energy and energy services, (b) changes in energy commodity prices, (c) timing of maintenance and other expenditures, (d) acquisitions and dispositions of businesses, assets and other interests, and (e) the impact of the ongoing COVID-19 pandemic and the economic effects of the pandemic which have resulted in a substantial decrease in natural gas, NGLs and crude oil prices.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Depreciation Expense

Depreciation ExpenseOn March 26, 2020, FERC issued an order approving MRT’s 2018 Rate Case and 2019 Rate Case settlements. As a result of the settlements, the new depreciation rates for MRT have been applied in accordance with the order. The new depreciation rates did not result in a material change in depreciation expense or results of operations.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts Receivable and Allowance for Doubtful Accounts

The Partnership adopted ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” on January 1, 2020. Upon adoption, the Partnership recognized a $3 million cumulative adjustment to Partners’ Equity and a corresponding adjustment to Allowance for doubtful accounts.

Accounts receivable are recorded at the invoiced amount and do not typically bear interest. The determination of the allowance for doubtful accounts requires management to make estimates and judgments regarding our customers’ ability to pay. The allowance for doubtful accounts is determined based primarily upon the historical loss-rate method established for various pools of accounts receivables with similar levels of credit risk. The historical loss-rates are then adjusted, as necessary, based on current conditions and forecast information that could result in future uncollectable amounts. On an ongoing basis, we evaluate our customers’ financial strength and liquidity based on aging of accounts receivable, payment history, and review of other relevant information, including ratings agency credit ratings and alerts, publicly available reports and news releases, and bank and trade references. It is the policy of management to review the outstanding accounts receivable and other receivable balances within other assets at least quarterly, giving consideration to credit losses, the aging of receivables, specific customer circumstances that may impact their ability to pay the amounts due and current and forecast economic conditions over the assets contractual lives.

Inventory

InventoryNatural gas inventory is held, through the transportation and storage segment, to provide operational support for pipeline deliveries and to manage leased intrastate storage capacity. Natural gas liquids inventory is held, through the gathering and processing segment, due to timing differences between the production of certain natural gas liquids and ultimate sale to third parties. Natural gas and natural gas liquids inventory is valued using moving average cost and is subsequently recorded at the lower of cost or net realizable value.

Impairment of Long-lived Assets (including Intangible Assets) and Impairment of Goodwill

Impairment of Long-Lived Assets (including Intangible Assets)

The Partnership periodically evaluates long-lived assets, including property, plant and equipment, and specifically identifiable intangibles other than goodwill, when events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. The determination of whether an impairment has occurred is based on an estimate of undiscounted cash flows attributable to the assets, as compared to the carrying value of the assets. For more information, see Note 7.

Impairment of Goodwill

The Partnership assesses its goodwill for impairment annually on October 1st, or more frequently if events or changes in circumstances indicate that the carrying value of goodwill may not be recoverable. Goodwill is assessed for impairment by comparing the fair value of the reporting unit with its book value, including goodwill. The Partnership utilizes the market or income approaches to estimate the fair value of the reporting unit, also giving consideration to the alternative cost approach. Under the market approach, historical and current year forecasted cash flows are multiplied by a market multiple to determine fair value. Under the income approach, anticipated cash flows over a period of years plus a terminal value are discounted to present value using appropriate discount rates. The resulting fair value of the reporting unit is then compared to the carrying amount of the reporting unit and an impairment charge is recorded to goodwill for the difference. The Partnership performs its goodwill impairment testing at the reporting unit, which is one level below the transportation and storage and gathering and processing reportable segment level. For more information, see Note 7.

New Accounting Pronouncements

Reference Rate Reform

In March 2020, the FASB issued ASU No. 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” This standard provides optional guidance, for a limited time, to ease the potential burden in accounting for or recognizing the effects of reference rate reform on financial reporting. The standard was effective upon issuance and generally can be applied through December 31, 2022. The Partnership adopted ASU 2020-04 during the year ended December 31, 2020. The implementation had no material impact on the Consolidated Financial Statements and related disclosures.

In January 2021, the FASB issued ASU No. 2021-01, “Reference Rate Reform (Topic 848): Scope.” This standard clarifies that certain optional expedients and exceptions in ASC 848 for contract modifications and hedge accounting apply to derivatives that are affected by the discounting transition. ASU 2021-01 also amends the expedients and exceptions in ASC 848 to capture the incremental consequences of the scope clarification and to tailor the existing guidance to derivative instruments affected by the discounting transition. ASU 2021-01 was effective upon issuance and generally can be applied through December 31, 2022. The Partnership adopted ASU 2021-01 during three months ended March 31, 2021. The implementation had no material impact on the Condensed Consolidated Financial Statements and related disclosures.

Derivatives Instruments and Hedging Activities

The primary risks managed using derivative instruments are commodity price and interest rate risks.

Derivatives Not Designated as Hedging Instruments

Derivative instruments not designated as hedging instruments for accounting purposes are utilized to manage the Partnership’s exposure to commodity price risk. For derivative instruments not designated as hedging instruments, the gain or loss on the derivative is recognized currently in earnings.

Derivatives Designated as Hedging Instruments

Derivative instruments designated as hedging instruments for accounting purposes are utilized in managing the Partnership’s interest rate risk exposures.

Fair Value Measurements

Certain assets and liabilities are recorded at fair value in the Condensed Consolidated Balance Sheets and are categorized based upon the level of judgment associated with the inputs used to measure their value. The Partnership determines the appropriate level for each financial asset and liability on a quarterly basis and recognizes transfers between levels at the end of the reporting period. For the three months ended March 31, 2021, there were no transfers between levels. As of March 31, 2021, there were no contracts classified as Level 3.

Reportable Segments

The Partnership’s determination of reportable segments considers the strategic operating units under which it manages sales, allocates resources and assesses performance of various products and services to customers in differing regulatory environments. The accounting policies of the reportable segments are the same as those described in the summary of significant accounting policies excerpt in the Partnership’s audited 2020 Notes to Consolidated Financial Statements included in the Annual Report. The Partnership uses operating income as the measure of profit or loss for its reportable segments.

The Partnership’s assets and operations are organized into two reportable segments: (i) gathering and processing and (ii) transportation and storage. Our gathering and processing segment primarily provides natural gas gathering and processing services to our producer customers and crude oil, condensate and produced water gathering services to our producer and refiner customers. The transportation and storage segment provides interstate and intrastate natural gas pipeline transportation and storage services primarily to our producer, power plant, LDC and industrial end-user customers.

XML

Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Accounting Policies [Abstract]

Accounts Receivable, Allowance for Credit Loss

The following table summarizes the required allowance for doubtful accounts.

	March 31, 2021		December 31, 2020
	(In millions)
Accounts receivable	$	4	$	1
Other assets	3		3
Total Allowance for doubtful accounts	$	7	$	4

XML

Revenue (Tables)

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables disaggregate total revenues by major source from contracts with customers and the gain (loss) on derivative activity for the three months ended March 31, 2021 and 2020.

	Three Months Ended March 31, 2021
	Gathering and Processing		Transportation and Storage		Eliminations		Total
	(In millions)
Revenues:
Product sales:
Natural gas	$	112	$	330	$	(130)	$	312
Natural gas liquids	297		3		(3)		297
Condensate	32		—		—		32
Total revenues from natural gas, natural gas liquids, and condensate	441		333		(133)		641
Loss on derivative activity	(13)		(1)		—		(14)
Total Product sales	$	428	$	332	$	(133)	$	627
Service revenues:
Demand revenues	$	26	$	127	$	—	$	153
Volume-dependent revenues	170		23		(3)		190
Total Service revenues	$	196	$	150	$	(3)	$	343
Total Revenues	$	624	$	482	$	(136)	$	970

	Three Months Ended March 31, 2020
	Gathering and Processing		Transportation and Storage		Eliminations		Total
	(In millions)
Revenues:
Product sales:
Natural gas	$	56	$	73	$	(60)	$	69
Natural gas liquids	172		2		(2)		172
Condensate	27		—		—		27
Total revenues from natural gas, natural gas liquids, and condensate	255		75		(62)		268
Gain on derivative activity	20		—		—		20
Total Product sales	$	275	$	75	$	(62)	$	288
Service revenues:
Demand revenues	$	39	$	142	$	—	$	181
Volume-dependent revenues	163		17		(1)		179
Total Service revenues	$	202	$	159	$	(1)	$	360
Total Revenues	$	477	$	234	$	(63)	$	648

Schedule of Accounts Receivable

The following table summarizes the components of accounts receivable, net of allowance for doubtful accounts.

	March 31, 2021		December 31, 2020
	(In millions)
Accounts Receivable:
Customers	$	272	$	245
Contract assets (1)	21		12
Non-customers	4		6
Total Accounts Receivable (2)	$	297	$	263

____________________

(1)Contract assets reflected in Total Accounts Receivable include accrued minimum volume commitments. Contract assets are primarily attributable to revenues associated with estimated shortfall volumes on certain annual minimum volume commitment arrangements. Total Accounts Receivable does not include contract assets related to firm service transportation contracts with tiered rates of $10 million as of March 31, 2021 and $9 million as of December 31, 2020, which are reflected in Other Assets.

(2)Total Accounts Receivable includes Accounts receivable, net of allowance for doubtful accounts and Accounts receivable—affiliated companies.

^[1],[2]

Summary of Timing Recognition of Contract Liabilities

The table below summarizes the change in the contract liabilities.

	March 31, 2021		December 31, 2020
	(In millions)
Deferred revenues, beginning of period (1)	$	44	$	48
Amounts recognized in revenues related to the beginning balance	(17)		(25)
Net additions	16		21
Deferred revenues, end of period (1)	$	43	$	44

____________________

(1)Deferred revenues includes deferred revenue—affiliated companies. This amount is included in Other current liabilities and Other long-term liabilities.

The table below summarizes the timing of recognition of these contract liabilities as of March 31, 2021.

	2021		2022		2023		2024		2025 and After
	(In millions)
Deferred revenues (1)	$	20	$	7	$	7	$	7	$	2

____________________

(1)Deferred revenues includes deferred revenue—affiliated companies. This amount is included in Other current liabilities and Other long-term liabilities.

^[3]

Summary of Timing Recognition of Remaining Performance Obligations

The table below summarizes the timing of recognition of the remaining performance obligations as of March 31, 2021.

	2021		2022		2023		2024		2025 and After
	(In millions)
Transportation and Storage	$	325	$	393	$	353	$	266	$	959
Gathering and Processing	93		123		121		101		213
Total remaining performance obligations	$	418	$	516	$	474	$	367	$	1,172

[1] Contract assets reflected in Total Accounts Receivable include accrued minimum volume commitments. Contract assets are primarily attributable to revenues associated with estimated shortfall volumes on certain annual minimum volume commitment arrangements. Total Accounts Receivable does not include contract assets related to firm service transportation contracts with tiered rates of $10 million as of March 31, 2021 and $9 million as of December 31, 2020, which are reflected in Other Assets.

[2] Total Accounts Receivable includes Accounts receivable, net of allowance for doubtful accounts and Accounts receivable—affiliated companies.

[3] Deferred revenues includes deferred revenue—affiliated companies. This amount is included in Other current liabilities and Other long-term liabilities.

XML

Leases (Tables)

3 Months Ended

Mar. 31, 2021

Leases [Abstract]

Schedule of Leasing Assets and Liabilities [Table Text Block]

The table below summarizes the operating leases included in the Condensed Consolidated Balance Sheets.

	Balance Sheet Location	March 31, 2021		December 31, 2020
		(In millions)
Operating lease asset	Other Assets	$	24	$	25
Total right-of-use assets		$	24	$	25
Operating lease liabilities	Other Current Liabilities	$	4	$	4
Operating lease liabilities	Other Liabilities	23		24
Total lease liabilities		$	27	$	28

Summary of Lease Expense

The following table presents the Partnership’s rental costs associated with field equipment and buildings.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Rental Costs:
Field equipment	$	3	$	5
Office space	1		1

The following table presents the Partnership’s lease cost.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Lease Cost:
Operating lease cost	$	1	$	2
Short-term lease cost	2		3
Variable lease cost	1		1
Total Lease Cost	$	4	$	6

The Partnership recorded no short-term lease costs in the transportation and storage reportable segment during the three months ended March 31, 2021 and 2020. All lease costs were included in the gathering and processing reportable segment.

Schedule of Operating Lease Obligations Expiration

Undiscounted cash flows for operating lease liabilities are as follows:

	Non-cancellable operating leases
	(In millions)
Year Ending December 31,
2021 - remainder	$	4
2022	5
2023	6
2024	4
2025	3
2026	2
After 2026	6
Total	30
Less: impact of the applicable discount rate	3
Total lease liabilities	$	27

XML

Earnings Per Limited Partner Unit (Tables)

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Schedule Of Earnings Per Unit For Common Units

The following table illustrates the Partnership’s calculation of earnings per unit for common units.

	Three Months Ended March 31,
	2021		2020
	(In millions, except per unit data)
Net income	$	165	$	105
Net income (loss) attributable to noncontrolling interest	1		(7)
Series A Preferred Unit distributions	9		9
Net income available to common units	$	155	$	103
Net income allocable to common units	$	155	$	103
Dilutive effect of Series A Preferred Unit distributions	9		9
Diluted net income allocable to common units	$	164	$	112
Basic weighted average number of common units outstanding (1)	438		437
Dilutive effect of Series A Preferred Units	57		144
Dilutive effect of performance units (2)	—		—
Diluted weighted average number of common units outstanding	495		581
Basic and diluted earnings per unit
Basic	$	0.35	$	0.24
Diluted	$	0.33	$	0.19

____________________

(1)Basic weighted average number of outstanding common units includes approximately two million time-based phantom units for each of the three months ended March 31, 2021 and 2020.

(2)The dilutive effect of the performance unit awards was less than $0.01 per unit during the three months ended March 31, 2021 and 2020.

XML

Partners' Equity (Tables)

3 Months Ended

Mar. 31, 2021

Equity [Abstract]

Schedule of Equity Transactions with Limited Partner

The Partnership paid or has authorized payment of the following cash distributions to common unitholders, as applicable, during 2021 and 2020 (in millions, except for per unit amounts):

Three Months Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2021(1)	May 13, 2021	May 25, 2021	$	0.16525	$	72
December 31, 2020	February 22, 2021	March 1, 2021	0.16525		72
September 30, 2020	November 17, 2020	November 24, 2020	0.16525		72
June 30, 2020	August 18, 2020	August 25, 2020	0.16525		72
March 31, 2020	May 19, 2020	May 27, 2020	0.16525		72

_____________________

(1)The Board of Directors declared a $0.16525 per common unit cash distribution on April 26, 2021, to be paid on May 25, 2021 to common unitholders of record at the close of business on May 13, 2021.

Schedule of Cash Distributions to Series A Preferred Unitholders

The Partnership paid or has authorized payment of the following cash distributions to holders of the Series A Preferred Units during 2021 and 2020 (in millions, except for per unit amounts):

Three Months Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2021(1)	April 26, 2021	May 14, 2021	$	0.5873	$	9
December 31, 2020	February 12, 2021	February 12, 2021	0.625		9
September 30, 2020	November 3, 2020	November 13, 2020	0.625		9
June 30, 2020	August 4, 2020	August 14, 2020	0.625		9
March 31, 2020	May 5, 2020	May 15, 2020	0.625		9

_____________________

(1)The Board of Directors declared a $0.5873 per Series A Preferred Unit cash distribution on April 26, 2021, to be paid on May 14, 2021, to Series A Preferred unitholders of record at the close of business on April 26, 2021.

^[1]

[1] The Board of Directors declared a $0.5873 per Series A Preferred Unit cash distribution on April 26, 2021, to be paid on May 14, 2021, to Series A Preferred unitholders of record at the close of business on April 26, 2021.

XML

Investment in Equity Method Affiliate (Tables)

3 Months Ended

Mar. 31, 2021

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Investments Detail

The following table presents the amount of Equity in earnings of equity method affiliate recognized and Distributions from equity method affiliate received.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Equity in earnings of equity method affiliate	$	1	$	6
Distributions from equity method affiliate (1)	4		10

___________________

(1)Distributions from equity method affiliate includes a $1 million and $6 million return on investment and a $3 million and $4 million return of investment for the three months ended March 31, 2021 and 2020, respectively.

The following table includes the summarized financial information of SESH.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Income Statements:
Revenues	$	15	$	27
Operating income	4		16
Net income (loss)	(1)		11

^[1]

[1] Distributions from equity method affiliate includes a $1 million and $6 million return on investment and a $3 million and $4 million return of investment for the three months ended March 31, 2021 and 2020, respectively.

XML

Debt (Tables)

3 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Schedule of Debt

The following table presents the Partnership’s outstanding debt.

	March 31, 2021						December 31, 2020
	Outstanding Principal		Discount (1)		Total Debt		Outstanding Principal		Discount (1)		Total Debt
	(In millions)
Commercial Paper	$	214	$	—	$	214	$	250	$	—	$	250
2019 Term Loan Agreement	800		—		800		800		—		800
2024 Notes	600		—		600		600		—		600
2027 Notes	700		(2)		698		700		(2)		698
2028 Notes	800		(4)		796		800		(5)		795
2029 Notes	547		(1)		546		547		(1)		546
2044 Notes	531		—		531		531		—		531
Total debt	$	4,192	$	(7)	$	4,185	$	4,228	$	(8)	$	4,220
Less: Short-term debt (2)					214						250
Less: Current portion of long-term debt (3)					800						—
Less: Unamortized debt expense (4)					19						19
Total long-term debt					$	3,152					$	3,951

____________________

(1)Unamortized discount on long-term debt is amortized over the life of the respective debt.

(2)Short-term debt includes $214 million and $250 million of outstanding commercial paper as of March 31, 2021 and December 31, 2020, respectively.

(3)As of March 31, 2021, Current portion of long-term debt included $800 million outstanding balance of the 2019 Term Loan Agreement.

(4)As of both March 31, 2021 and December 31, 2020, there was an additional $3 million of unamortized debt expense related to the Revolving Credit Facility included in Other assets, not included above.

^{[1],[2],[3],[4]}

[1] As of March 31, 2021, Current portion of long-term debt included $800 million outstanding balance of the 2019 Term Loan Agreement.

[2] As of both March 31, 2021 and December 31, 2020, there was an additional $3 million of unamortized debt expense related to the Revolving Credit Facility included in Other assets, not included above.

[3] Short-term debt includes $214 million and $250 million of outstanding commercial paper as of March 31, 2021 and December 31, 2020, respectively.

[4] Unamortized discount on long-term debt is amortized over the life of the respective debt.

XML

Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments

The following table presents the Partnership’s derivative instruments that were not designated as hedging instruments for accounting purposes.

	March 31, 2021		December 31, 2020
	Gross Notional Volume
	Purchases	Sales	Purchases	Sales
Natural gas— TBtu (1)
Financial fixed futures/swaps	1	17	—	18
Financial basis futures/swaps	1	34	—	27
Financial swaptions (2)	—	5	—	7
Crude oil (for condensate)— MBbl (3)
Financial futures/swaps	—	420	—	465
Financial swaptions (2)	—	150	—	90
Natural gas liquids— MBbl (4)
Financial futures/swaps	435	1,155	855	1,210
Financial options	—	30	—	45

____________________

(1)As of March 31, 2021, 99.2% of the natural gas contracts had durations of one year or less and 0.8% had durations of more than one year and less than two years. As of December 31, 2020, 95.7% of the natural gas contracts had durations of one year or less and 4.3% had durations of more than one year and less than two years.

(2)The notional volume contains a combined derivative instrument consisting of a fixed price swap and a sold option, which gives the counterparties the right, but not the obligation, to increase the notional volume hedged under the fixed price swap until the option expiration date. The notional volume represents the volume prior to option exercise.

(3)As of March 31, 2021, 89.5% of the crude oil (for condensate) contracts had durations of one year or less and 10.5% had durations of more than one year and less than two years. As of December 31, 2020, 100.0% of the crude oil (for condensate) contracts had durations of one year or less.

(4)As of March 31, 2021, 97.2% of the natural gas liquids contracts had durations of one year or less and 2.8% had durations of more than one year and less than two years. As of December 31, 2020, 100.0% of the natural gas liquids contracts had durations of one year or less.

The following table presents the Partnership’s derivative instruments that were designated as hedging instruments for accounting purposes.

	March 31, 2021		December 31, 2020
	Gross Notional Value
	(In millions)
Interest rate swaps	$	300	$	300

^{[1],[2],[3],[4]}

Schedule of Derivative Assets at Fair Value

The following table presents the fair value of the derivative instruments that are included in the Partnership’s Condensed Consolidated Balance Sheets that were not designated as hedging instruments for accounting purposes.

		March 31, 2021				December 31, 2020
		Fair Value
Instrument	Balance Sheet Location	Assets		Liabilities		Assets		Liabilities
		(In millions)
Natural gas
Financial futures/swaps	Other Current	$	1	$	3	$	2	$	2
Financial swaptions	Other Current	1		2		1		2
Crude oil (for condensate)
Financial futures/swaps	Other Current	—		10		1		13
Financial swaptions	Other Current	—		1		—		—
Natural gas liquids
Financial futures/swaps	Other Current	9		6		15		3
Financial swaptions	Other Current	—		1		—		1
Total gross commodity derivatives (1)		$	11	$	23	$	19	$	21

_____________________

(1)See Note 11 for a reconciliation of the Partnership’s commodity derivatives fair value to the Partnership’s Condensed Consolidated Balance Sheets as of March 31, 2021 and December 31, 2020.

The following table presents the fair value of the derivative instruments that are included in the Partnership’s Condensed Consolidated Balance Sheets that were designated as hedging instruments for accounting purposes.

		March 31, 2021				December 31, 2020
		Fair Value
Instrument	Balance Sheet Location	Assets		Liabilities		Assets		Liabilities
		(In millions)
Interest rate swaps (1)	Other Current	$	—	$	5	$	—	$	6

_____________________

(1)All interest rate derivative instruments that were designated as cash flow hedges are considered Level 2 as of March 31, 2021 and December 31, 2020.

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The following table presents the effect of derivative instruments on the Partnership’s Condensed Consolidated Statements of Income.

	Amounts Recognized in Income
	Three Months Ended March 31,
	2021		2020
	(In millions)
Natural gas
Financial futures/swaps gains (losses)	$	(2)	$	4
Financial swaptions losses	—		(1)
Physical purchases/sales gains	—		1
Crude oil (for condensate)
Financial futures/swaps gains (losses)	(6)		19
Financial swaptions gains (losses)	(1)		4
Natural gas liquids
Financial futures/swaps losses	(5)		(7)
Total	$	(14)	$	20

The following table presents the effect of derivative instruments that were designated as hedging instruments on the Partnership’s Condensed Consolidated Statements of Income.

	Amounts Recognized in Income
	Three Months Ended March 31,
	2021		2020
	(In millions)
Interest rate swaps losses	$	(1)	$	—

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location

The following table presents the components of gain (loss) on derivative activity in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Change in fair value of commodity derivatives	$	(10)	$	10
Realized gain (loss) on commodity derivatives	(4)		10
Gain (loss) on commodity derivative activity	$	(14)	$	20

[1] As of March 31, 2021, 89.5% of the crude oil (for condensate) contracts had durations of one year or less and 10.5% had durations of more than one year and less than two years. As of December 31, 2020, 100.0% of the crude oil (for condensate) contracts had durations of one year or less.

[2] As of March 31, 2021, 97.2% of the natural gas liquids contracts had durations of one year or less and 2.8% had durations of more than one year and less than two years. As of December 31, 2020, 100.0% of the natural gas liquids contracts had durations of one year or less.

[3] As of March 31, 2021, 99.2% of the natural gas contracts had durations of one year or less and 0.8% had durations of more than one year and less than two years. As of December 31, 2020, 95.7% of the natural gas contracts had durations of one year or less and 4.3% had durations of more than one year and less than two years.

[4] The notional volume contains a combined derivative instrument consisting of a fixed price swap and a sold option, which gives the counterparties the right, but not the obligation, to increase the notional volume hedged under the fixed price swap until the option expiration date. The notional volume represents the volume prior to option exercise.

XML

Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value and Carrying Amount of Financial Instruments

The following table summarizes the fair value and carrying amount of the Partnership’s financial instruments.

	March 31, 2021				December 31, 2020
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(In millions)
Debt
Revolving Credit Facility (Level 2) (1)	$	—	$	—	$	—	$	—
2019 Term Loan Agreement (Level 2)	800		800		800		800
2024 Notes (Level 2)	600		639		600		612
2027 Notes (Level 2)	698		758		698		709
2028 Notes (Level 2)	796		884		795		817
2029 Notes (Level 2)	546		568		546		544
2044 Notes (Level 2)	531		527		531		499

____________________

(1)    Borrowing capacity is effectively reduced by our borrowings outstanding under the commercial paper program. $214 million and $250 million of commercial paper was outstanding as of March 31, 2021 and December 31, 2020, respectively.

^[1]

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables summarize the Partnership’s other assets and liabilities that are measured at fair value on a recurring basis. 

March 31, 2021	Commodity Contracts				Gas Imbalances (1)
	Assets		Liabilities		Assets (2)		Liabilities (3)
	(In millions)
Quoted market prices in active market for identical assets (Level 1)	$	1	$	10	$	—	$	—
Significant other observable inputs (Level 2)	10		13		30		10
Total fair value	11		23		30		10
Netting adjustments	(11)		(11)		—		—
Total	$	—	$	12	$	30	$	10

December 31, 2020	Commodity Contracts				Gas Imbalances (1)
	Assets		Liabilities		Assets (2)		Liabilities (3)
	(In millions)
Quoted market prices in active market for identical assets (Level 1)	$	2	$	14	$	—	$	—
Significant other observable inputs (Level 2)	17		7		23		16
Total fair value	19		21		23		16
Netting adjustments	(19)		(19)		—		—
Total	$	—	$	2	$	23	$	16

______________________

(1)The Partnership uses the market approach to fair value its gas imbalance assets and liabilities at individual, or where appropriate an average of, current market indices applicable to the Partnership’s operations, not to exceed net realizable value. There were no netting adjustments as of March 31, 2021 and December 31, 2020.

(2)Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $19 million and $19 million at March 31, 2021 and December 31, 2020, respectively, which fuel reserves are based on the value of natural gas at the time the imbalance was created, and which are not subject to revaluation at fair market value.

(3)Gas imbalance liabilities exclude fuel reserves for over retained fuel due to shippers of $3 million and $3 million at March 31, 2021 and December 31, 2020, respectively, which fuel reserves are based on the value of natural gas at the time the imbalance was created, and which are not subject to revaluation at fair market value.

^[2],[3],[4]

[1] Borrowing capacity is effectively reduced by our borrowings outstanding under the commercial paper program. $214 million and $250 million of commercial paper was outstanding as of March 31, 2021 and December 31, 2020, respectively.

[2] Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $19 million and $19 million at March 31, 2021 and December 31, 2020, respectively, which fuel reserves are based on the value of natural gas at the time the imbalance was created, and which are not subject to revaluation at fair market value.

[3] Gas imbalance liabilities exclude fuel reserves for over retained fuel due to shippers of $3 million and $3 million at March 31, 2021 and December 31, 2020, respectively, which fuel reserves are based on the value of natural gas at the time the imbalance was created, and which are not subject to revaluation at fair market value.

[4] The Partnership uses the market approach to fair value its gas imbalance assets and liabilities at individual, or where appropriate an average of, current market indices applicable to the Partnership’s operations, not to exceed net realizable value. There were no netting adjustments as of March 31, 2021 and December 31, 2020.

XML

Supplemental Disclosure of Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2021

Supplemental Cash Flow Information [Abstract]

Schedule of Cash Flow, Supplemental Disclosures

The following table provides information regarding supplemental cash flow information:

	Three Months Ended March 31,
	2021		2020
	(In millions)
Supplemental Disclosure of Cash Flow Information:
Cash Payments:
Interest, net of capitalized interest	$	32	$	43
Income taxes, net of refunds	(2)		—
Non-cash transactions:
Accounts payable related to capital expenditures	7		8
Lease liabilities related to derecognition of right-of-use assets	—		(4)
Impact of adoption of financial instruments-credit losses accounting standard (Note 1)	—		(3)

XML

Related Party Transactions (Tables)

3 Months Ended

Mar. 31, 2021

Related Party Transactions [Abstract]

Schedule of Revenues from Related Parties

The following table presents the amounts of revenues from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Gas transportation and storage service revenues — CenterPoint Energy	$	27	$	37
Gas transportation and storage service revenues — OGE Energy	10		9
Natural gas product sales — OGE Energy	31		5
Total revenues — affiliated companies	$	68	$	51

Schedule of Natural Gas Purchased From Related Parties

The following table presents the amounts of natural gas purchased from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Cost of natural gas purchases — CenterPoint Energy	$	—	$	1
Cost of natural gas purchases — OGE Energy	31		8
Total cost of natural gas purchases — affiliated companies	$	31	$	9

Schedule of Amounts Charged to Partnership by Related Parties

The following table presents the amounts charged to the Partnership by affiliates for seconded employees, included primarily in Operation and maintenance and General and administrative expenses in the Partnership’s Condensed Consolidated Statements of Income.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Seconded Employee Costs — OGE Energy	$	4	$	3

XML

Equity-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2021

Share-based Payment Arrangement [Abstract]

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award

The following table summarizes the Partnership’s equity-based compensation expense related to performance units and phantom units for the Partnership’s employees and independent directors.

	Three Months Ended March 31,
	2021		2020
	(In millions)
Performance units	$	2	$	2
Phantom units	2		2
Total compensation expense	$	4	$	4

The following table presents the assumptions related to the performance units granted in 2021.

	2021
Number of units granted	1,453,897
Fair value of units granted	$	10.26
Expected distribution yield	12.90		%
Expected price volatility	100.00		%
Risk-free interest rate	0.27		%
Expected life of units (in years)	3

The following table presents the number of phantom units granted and the grant date fair value related to the phantom units granted in 2021.

	2021
Phantom Units granted	1,356,672
Fair value of phantom units granted	$5.41 - $6.87

Schedule of Share-based Compensation, Activity

A summary of the activity for the Partnership’s performance units and phantom units applicable to the Partnership’s employees at March 31, 2021 and changes during 2021 are shown in the following table.

	Performance Units				Phantom Units
	Number of Units		Weighted Average Grant-Date Fair Value, Per Unit		Number of Units		Weighted Average Grant-Date Fair Value, Per Unit
	(In millions, except unit data)
Units outstanding at December 31, 2020	1,765,508		$	13.10	1,790,845		$	10.29
Granted (1)	1,453,897		10.26		1,356,672		6.86
Vested (2)	(389,817)		17.70		(461,824)		13.11
Forfeited	(32,625)		10.00		(94,669)		8.70
Units outstanding at March 31, 2021	2,796,963		$	11.02	2,591,024		$	8.05
Aggregate intrinsic value of units outstanding at March 31, 2021	$	18			$	17

_____________________

(1)Performance units represents the target number of performance units granted. The actual number of performance units earned, if any, is dependent upon performance and may range from 0% to 200% of the target.

(2)Performance units vested as of March 31, 2021 include 389,817 units from the 2018 annual grant, which were approved by the Board of Directors in 2018 and, based on the level of achievement of a performance goal established by the Board of Directors over the performance period of January 1, 2018 through December 31, 2020, no performance units vested.

^[1],[2]

Schedule of Unrecognized Compensation Cost, Nonvested Awards

The following table summarizes the Partnership’s unrecognized compensation cost for its non-vested performance units and phantom units, and the weighted-average periods over which the compensation cost is expected to be recognized.

	March 31, 2021
	Unrecognized Compensation Cost (In millions)		Weighted Average Period for Recognition (In years)
Performance Units	$	21	2.25
Phantom Units	14		2.07
Total	$	35

[1] Performance units represents the target number of performance units granted. The actual number of performance units earned, if any, is dependent upon performance and may range from 0% to 200% of the target.

[2] Performance units vested as of March 31, 2021 include 389,817 units from the 2018 annual grant, which were approved by the Board of Directors in 2018 and, based on the level of achievement of a performance goal established by the Board of Directors over the performance period of January 1, 2018 through December 31, 2020, no performance units vested.

XML

Reportable Segments (Tables)

3 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Schedule of Financial Data for Business Segments and Services

Financial data for reportable segments are as follows:

Three Months Ended March 31, 2021	Gathering and Processing		Transportation (1) and Storage		Eliminations		Total
	(In millions)
Product sales	$	428	$	332	$	(133)	$	627
Service revenues	196		150		(3)		343
Total Revenues	624		482		(136)		970
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	398		257		(136)		519
Operation and maintenance, General and administrative	79		42		—		121
Depreciation and amortization	74		32		—		106
Taxes other than income tax	11		7		—		18
Operating income	$	62	$	144	$	—	$	206
Total Assets	$	10,780	$	5,789	$	(4,805)	$	11,764
Capital expenditures	$	21	$	59	$	—	$	80
Three Months Ended March 31, 2020	Gathering and Processing		Transportation (1) and Storage		Eliminations		Total
	(In millions)
Product sales	$	275	$	75	$	(62)	$	288
Service revenues	202		159		(1)		360
Total Revenues	477		234		(63)		648
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	211		78		(63)		226
Operation and maintenance, General and administrative	81		45		—		126
Depreciation and amortization	74		30		—		104
Impairments of property, plant and equipment and goodwill	28		—		—		28
Taxes other than income tax	11		7		—		18
Operating income	$	72	$	74	$	—	$	146
Total assets as of December 31, 2020	$	10,830	$	5,729	$	(4,830)	$	11,729
Capital expenditures	$	34	$	20	$	—	$	54

_____________________

(1)See Note 8 for discussion regarding ownership interests in SESH and related equity earnings included in the transportation and storage segment for the three months ended March 31, 2021 and 2020.

^[1]

[1] See Note 8 for discussion regarding ownership interests in SESH and related equity earnings included in the transportation and storage segment for the three months ended March 31, 2021 and 2020.

XML

Summary of Significant Accounting Policies - Narrative (Details) $ in Millions			3 Months Ended
	Feb. 17, 2021 USD ($) shares	Apr. 01, 2020 USD ($)	Mar. 31, 2021 USD ($) board_member segment shares	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Jan. 01, 2020 USD ($)	Dec. 31, 2019 USD ($)
Significant Accounting Policies [Line Items]
Number of reportable segments | segment			2
Number of representatives designated by each of CenterPoint Energy and OGE Energy | board_member			2
Number of independent board members | board_member			3
Percentage vote by all unitholders (at least 75%)			75.00%
Merger Termination Fee	$ 97.5
Sale of interest		$ 19.0
Partners' Capital, Including Portion Attributable to Noncontrolling Interest			$ 7,181.0	$ 7,352.0	$ 7,095.0		$ 7,409.0
Accounts receivable			4.0			$ 1.0
Other assets			3.0			3.0
Total Allowance for doubtful accounts			7.0			$ 4.0
Inventory adjustments			$ 1.0	6.0
Partnership Interest
Significant Accounting Policies [Line Items]
Payments to Acquire Businesses, Gross	$ 10.0
Cumulative Effect, Period of Adoption, Adjustment
Significant Accounting Policies [Line Items]
Partners' Capital, Including Portion Attributable to Noncontrolling Interest							(3.0)
Common Unit [Member]
Significant Accounting Policies [Line Items]
Merger Agreement, Right to Receive Number of Common Units Per Share | shares	0.8595
Series A Preferred Units [Member]
Significant Accounting Policies [Line Items]
Merger Agreement, Right to Receive Number of Common Units Per Share | shares	0.0265
Atoka
Significant Accounting Policies [Line Items]
Ownership interest (as a percentage)			50.00%
ESCP
Significant Accounting Policies [Line Items]
Ownership interest (as a percentage)			60.00%
OGE Energy | Partners' Capital
Significant Accounting Policies [Line Items]
Limited partner ownership interest percentage			25.50%
CenterPoint | Partners' Capital
Significant Accounting Policies [Line Items]
Limited partner ownership interest percentage			53.70%
CenterPoint and OGE Energy | Partners' Capital
Significant Accounting Policies [Line Items]
Limited partner ownership interest percentage			79.00%
OGE Energy | Partners' Capital | Common Unit [Member]
Significant Accounting Policies [Line Items]
Units outstanding | shares			110,982,805
CenterPoint | Partners' Capital | Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units
Significant Accounting Policies [Line Items]
Series A preferred units held by CenterPoint Energy | shares			14,520,000
CenterPoint | Partners' Capital | Common Unit [Member]
Significant Accounting Policies [Line Items]
Units outstanding | shares			233,856,623
Partners' Capital | Common Unit [Member]
Significant Accounting Policies [Line Items]
Partners' Capital, Including Portion Attributable to Noncontrolling Interest			$ 6,798.0	$ 6,972.0	$ 6,713.0		7,013.0
Partners' Capital | Common Unit [Member] | Cumulative Effect, Period of Adoption, Adjustment
Significant Accounting Policies [Line Items]
Partners' Capital, Including Portion Attributable to Noncontrolling Interest			$ 0.0				$ (3.0)
Partners' Capital | OGE Energy
Significant Accounting Policies [Line Items]
Percentage share of management rights			50.00%
Percentage share of incentive distribution rights			60.00%
Partners' Capital | CenterPoint
Significant Accounting Policies [Line Items]
Percentage share of management rights			50.00%
Percentage share of incentive distribution rights			40.00%

XML

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	$ 641	$ 268
Gain (loss) on derivative activity	(14)	20
Total Revenues	970	648
Natural gas
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	312	69
Natural gas liquids
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	297	172
Condensate Natural Gas
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	32	27
Product
Disaggregation of Revenue [Line Items]
Total Revenues	627	288
Demand Service Revenue
Disaggregation of Revenue [Line Items]
Total Revenues	153	181
Volume Dependant Service Revenue
Disaggregation of Revenue [Line Items]
Total Revenues	190	179
Natural Gas, Gathering, Transportation, Marketing and Processing
Disaggregation of Revenue [Line Items]
Total Revenues	343	360
Operating Segments | Gathering and Processing
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	441	255
Gain (loss) on derivative activity	(13)	20
Total Revenues	624	477
Operating Segments | Gathering and Processing | Natural gas
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	112	56
Operating Segments | Gathering and Processing | Natural gas liquids
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	297	172
Operating Segments | Gathering and Processing | Condensate Natural Gas
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	32	27
Operating Segments | Gathering and Processing | Product
Disaggregation of Revenue [Line Items]
Total Revenues	428	275
Operating Segments | Gathering and Processing | Demand Service Revenue
Disaggregation of Revenue [Line Items]
Total Revenues	26	39
Operating Segments | Gathering and Processing | Volume Dependant Service Revenue
Disaggregation of Revenue [Line Items]
Total Revenues	170	163
Operating Segments | Gathering and Processing | Natural Gas, Gathering, Transportation, Marketing and Processing
Disaggregation of Revenue [Line Items]
Total Revenues	196	202
Operating Segments | Transportation and Storage
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	333	75
Gain (loss) on derivative activity	(1)	0
Total Revenues	482	234
Operating Segments | Transportation and Storage | Natural gas
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	330	73
Operating Segments | Transportation and Storage | Natural gas liquids
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	3	2
Operating Segments | Transportation and Storage | Condensate Natural Gas
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	0	0
Operating Segments | Transportation and Storage | Product
Disaggregation of Revenue [Line Items]
Total Revenues	332	75
Operating Segments | Transportation and Storage | Demand Service Revenue
Disaggregation of Revenue [Line Items]
Total Revenues	127	142
Operating Segments | Transportation and Storage | Volume Dependant Service Revenue
Disaggregation of Revenue [Line Items]
Total Revenues	23	17
Operating Segments | Transportation and Storage | Natural Gas, Gathering, Transportation, Marketing and Processing
Disaggregation of Revenue [Line Items]
Total Revenues	150	159
Eliminations
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	(133)	(62)
Gain (loss) on derivative activity	0	0
Total Revenues	(136)	(63)
Eliminations | Natural gas
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	(130)	(60)
Eliminations | Natural gas liquids
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	(3)	(2)
Eliminations | Condensate Natural Gas
Disaggregation of Revenue [Line Items]
Total revenues from natural gas, natural gas liquids, and condensate	0	0
Eliminations | Product
Disaggregation of Revenue [Line Items]
Total Revenues	(133)	(62)
Eliminations | Demand Service Revenue
Disaggregation of Revenue [Line Items]
Total Revenues	0	0
Eliminations | Volume Dependant Service Revenue
Disaggregation of Revenue [Line Items]
Total Revenues	(3)	(1)
Eliminations | Natural Gas, Gathering, Transportation, Marketing and Processing
Disaggregation of Revenue [Line Items]
Total Revenues	$ (3)	$ (1)

XML

Revenue - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Revenue recognized related to rate case settlement		$ 17
Regulatory Liabilities, Refund to Customers	$ 21

XML

Revenue - Accounts Receivable (Details) - USD ($) $ in Millions		Mar. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Customers		$ 272	$ 245
Contract assets	[1]	21	12
Non-customers		4	6
Total Accounts Receivable	[2]	297	263
Firm Service Transportation [Member]
Disaggregation of Revenue [Line Items]
Contract assets		$ 10	$ 9

[1] Contract assets reflected in Total Accounts Receivable include accrued minimum volume commitments. Contract assets are primarily attributable to revenues associated with estimated shortfall volumes on certain annual minimum volume commitment arrangements. Total Accounts Receivable does not include contract assets related to firm service transportation contracts with tiered rates of $10 million as of March 31, 2021 and $9 million as of December 31, 2020, which are reflected in Other Assets.

[2] Total Accounts Receivable includes Accounts receivable, net of allowance for doubtful accounts and Accounts receivable—affiliated companies.

XML

Revenue - Summary of Changes in Contract Liabilities (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Contract with Customer, Liability	[1]	$ 43	$ 44	$ 48
Amounts recognized in revenues related to the beginning balance		(17)	(25)
Net additions		$ 16	$ 21

[1] Deferred revenues includes deferred revenue—affiliated companies. This amount is included in Other current liabilities and Other long-term liabilities.

XML

Revenue - Summary of Recognition Contract Liabilities (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)	[1]
Revenue from Contract with Customer [Abstract]
2021	$ 20
2022	7
2023	7
2024	7
2025 and After	$ 2

[1] Deferred revenues includes deferred revenue—affiliated companies. This amount is included in Other current liabilities and Other long-term liabilities.

XML

Revenue - Summary of Recognition of Remaining Performance Obligations (Details) $ in Millions	Mar. 31, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	9 months
Total remaining performance obligations	$ 418
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Transportation and Storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	9 months
Total remaining performance obligations	$ 325
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01 | Gathering and Processing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	9 months
Total remaining performance obligations	$ 93
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Total remaining performance obligations	$ 516
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Transportation and Storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Total remaining performance obligations	$ 393
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Gathering and Processing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Total remaining performance obligations	$ 123
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Total remaining performance obligations	$ 474
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Transportation and Storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Total remaining performance obligations	$ 353
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Gathering and Processing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Total remaining performance obligations	$ 121
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Total remaining performance obligations	$ 367
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Transportation and Storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Total remaining performance obligations	$ 266
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Gathering and Processing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Total remaining performance obligations	$ 101
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	22 years 5 months
Total remaining performance obligations	$ 1,172
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Transportation and Storage
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	22 years 5 months
Total remaining performance obligations	$ 959
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Gathering and Processing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	4 years 2 months
Total remaining performance obligations	$ 213

XML

Leases - Schedule of Leasing Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Operating lease asset	$ 24	$ 25
Total lease liabilities	27	28
Other Current Liabilities
Lessee, Lease, Description [Line Items]
Operating Lease, Liability, Current	4	4
Other Liabilities
Lessee, Lease, Description [Line Items]
Operating Lease, Liability, Noncurrent	23	24
Other Assets [Member]
Lessee, Lease, Description [Line Items]
Operating lease asset	$ 24	$ 25

XML

Leases - Summary of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Lessee, Lease, Description [Line Items]
Weighted average lease term (in years)	6 years 6 months
Weighted average discount rate (as a percentage)	5.49%
Gathering and Processing
Lessee, Lease, Description [Line Items]
Rental costs	$ 4	$ 6
Operating lease cost	1	2
Short-term lease cost	2	3
Variable Lease, Cost	1	1
Total Lease Cost	4	6
Transportation and Storage
Lessee, Lease, Description [Line Items]
Short-term lease cost	0
Field equipment
Lessee, Lease, Description [Line Items]
Rental costs	3	5
Total Lease Cost	3	5
Buildings
Lessee, Lease, Description [Line Items]
Rental costs	1	1
Total Lease Cost	$ 1	$ 1

XML

Leases - Schedule of Operating Lease Obligations Expiration (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Leases [Abstract]
2021 - remainder	$ 4
2022	5
2023	6
2024	4
2025	3
2026	2
After 2026	6
Total	30
Less: impact of the applicable discount rate	3
Total lease liabilities	$ 27	$ 28

XML

Earnings Per Limited Partner Unit (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income		$ 165	$ 105
Net income (loss) attributable to noncontrolling interest		1	(7)
Series A Preferred Unit distributions		9	9
Net Income Attributable to Common Units (Note 5)		$ 155	$ 103
Diluted earnings (loss) per unit
Earnings Per Share, Diluted, Undistributed			$ 0.01
Phantom units
Basic weighted average number of outstanding
Basic weighted average number of outstanding		2,000,000	2,000,000
Common Unit [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income Attributable to Common Units (Note 5)		$ 155	$ 103
Dilutive effect of Series A Preferred Unit distributions		9	9
Diluted net income		$ 164	$ 112
Basic weighted average number of outstanding
Basic weighted average number of outstanding	[1]	438	437
Dilutive effect of Series A Preferred Units (in units)		57	144
Dilutive effect of performance units (in units)		0	0
Diluted weighted average number of outstanding units	[2]	495	581
Basic and diluted earnings per unit
Basic and diluted earnings per unit		$ 0.35	$ 0.24
Diluted earnings (loss) per unit
Diluted earnings per unit		$ 0.33	$ 0.19

[1] Basic weighted average number of outstanding common units includes approximately two million time-based phantom units for each of the three months ended March 31, 2021 and 2020.

[2] The dilutive effect of the performance unit awards was less than $0.01 per unit during the three months ended March 31, 2021 and 2020.

XML

Partners' Equity - Schedule of Cash Distributions (Details) - USD ($) $ / shares in Units, $ in Millions	May 25, 2021	May 14, 2021	May 13, 2021	Apr. 26, 2021	Mar. 01, 2021	Feb. 22, 2021	Feb. 12, 2021	Nov. 24, 2020	Nov. 17, 2020	Nov. 13, 2020	Nov. 03, 2020	Aug. 25, 2020	[1]	Aug. 18, 2020	[1]	Aug. 14, 2020	[2]	Aug. 04, 2020	[2]	May 27, 2020	May 19, 2020	May 15, 2020	May 05, 2020
Distribution Made to Limited Partner [Line Items]
Record Date						Feb. 22, 2021			Nov. 17, 2020					Aug. 18, 2020							May 19, 2020
Payment Date					Mar. 01, 2021			Nov. 24, 2020				Aug. 25, 2020								May 27, 2020
Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units | Preferred Units
Distribution Made to Limited Partner [Line Items]
Record Date							Feb. 12, 2021				Nov. 03, 2020							Aug. 04, 2020					May 05, 2020
Payment Date							Feb. 12, 2021			Nov. 13, 2020						Aug. 14, 2020						May 15, 2020
Cash Distribution
Distribution Made to Limited Partner [Line Items]
Cash distribution (in dollars per unit)					$ 0.16525			$ 0.16525				$ 0.16525								$ 0.16525
Cash distribution made to unitholders					$ 72			$ 72				$ 72								$ 72
Cash Distribution | Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units | Preferred Units
Distribution Made to Limited Partner [Line Items]
Cash distribution (in dollars per unit)							$ 0.625			$ 0.625						$ 0.625						$ 0.625
Cash distribution made to unitholders							$ 9			$ 9						$ 9						$ 9
Forecast | Subsequent Event
Distribution Made to Limited Partner [Line Items]
Record Date			May 13, 2021
Payment Date	May 25, 2021
Forecast | Subsequent Event | Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units | Preferred Units
Distribution Made to Limited Partner [Line Items]
Record Date				Apr. 26, 2021
Payment Date		May 14, 2021
Forecast | Subsequent Event | Cash Distribution
Distribution Made to Limited Partner [Line Items]
Cash distribution declared (in dollars per unit)	$ 0.16525
Cash distribution declared to unitholders	$ 72
Forecast | Subsequent Event | Cash Distribution | Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units | Preferred Units
Distribution Made to Limited Partner [Line Items]
Cash distribution declared (in dollars per unit)		$ 0.5873
Cash distribution declared to unitholders		$ 9

[1] The Board of Directors declared a $0.16525 per common unit cash distribution on April 26, 2021, to be paid on May 25, 2021 to common unitholders of record at the close of business on May 13, 2021.

[2] The Board of Directors declared a $0.5873 per Series A Preferred Unit cash distribution on April 26, 2021, to be paid on May 14, 2021, to Series A Preferred unitholders of record at the close of business on April 26, 2021.

XML

Partners' Equity - Narrative (Details) - $ / shares		1 Months Ended	3 Months Ended
	Feb. 18, 2016	Mar. 31, 2021	Mar. 31, 2021
Distribution Made to Limited Partner [Line Items]
Limited partners' capital account, required quarterly distribution period			60 days
Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units
Distribution Made to Limited Partner [Line Items]
Annual percentage rate	10.00%	8.7375%
Liquidation preference (in dollars per share)	$ 25.00
Duration of cash distributions	5 years
Preferred units liquidation spread			8.50%

XML

Impairment of Long-Lived Assets (Details) - Atoka - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Impaired Long-Lived Assets Held and Used [Line Items]
Ownership interest (as a percentage)	50.00%
Gathering and Processing
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets		$ 16

XML

Impairment of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2017	Mar. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill			$ 0	$ 0
Gathering and Processing
Goodwill [Line Items]
Goodwill acquired		$ 12
Goodwill impairment	$ (12)

XML

Investment in Equity Method Affiliate - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Schedule of Equity Method Investments [Line Items]
Amount billed associated with service agreements	$ 970	$ 648
SESH
Schedule of Equity Method Investments [Line Items]
Percentage of distributions through limited partner interest	50.00%
SESH | Enbridge, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%
SESH | Enable Midstream Partners, LP [Member]
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%
SESH | Equity Method Investee | Shared Operations Service Agreements
Schedule of Equity Method Investments [Line Items]
Amount billed associated with service agreements	$ 2	$ 6

XML

Investment in Equity Method Affiliate - Schedule of Investments (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Equity Method Affiliates Reported Amounts:
Return on investment in equity method affiliate		$ 1	$ 6
Return of investment in equity method affiliate		3	4
Operating income		206	146
Net Income (Loss)		165	105
SESH
Equity Method Affiliates Reported Amounts:
Equity in earnings of equity method affiliate		1	6
Distributions from equity method affiliate (1)	[1]	4	10
Return on investment in equity method affiliate		1	6
Return of investment in equity method affiliate		3	4
Revenues		15	27
Operating income		4	16
Net Income (Loss)		$ (1)	$ 11

[1] Distributions from equity method affiliate includes a $1 million and $6 million return on investment and a $3 million and $4 million return of investment for the three months ended March 31, 2021 and 2020, respectively.

XML

Debt - Schedule of Outstanding Debt (Details) - USD ($)		Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Short-term debt		$ 214,000,000	$ 250,000,000
Outstanding Principal		4,192,000,000	4,228,000,000
Discount	[1]	(7,000,000)	(8,000,000)
Total Debt		4,185,000,000	4,220,000,000
Less: Unamortized debt expense	[2]	(19,000,000)	(19,000,000)
Total long-term debt		3,152,000,000	3,951,000,000
2019 Term Loan Agreement | 2019 Term Loan Agreement
Debt Instrument [Line Items]
Outstanding Principal		800,000,000	800,000,000
Discount	[1]	0	0
Total Debt		800,000,000	800,000,000
Senior Notes | 2024 Notes
Debt Instrument [Line Items]
Outstanding Principal		600,000,000	600,000,000
Discount	[1]	0	0
Total Debt		600,000,000	600,000,000
Senior Notes | 2027 Notes
Debt Instrument [Line Items]
Outstanding Principal		700,000,000	700,000,000
Discount	[1]	(2,000,000)	(2,000,000)
Total Debt		698,000,000	698,000,000
Senior Notes | 2028 Notes
Debt Instrument [Line Items]
Outstanding Principal		800,000,000	800,000,000
Discount	[1]	(4,000,000)	(5,000,000)
Total Debt		796,000,000	795,000,000
Senior Notes | 2029 Notes
Debt Instrument [Line Items]
Outstanding Principal		547,000,000	547,000,000
Discount	[1]	(1,000,000)	(1,000,000)
Total Debt		546,000,000	546,000,000
Senior Notes | 2044 Notes
Debt Instrument [Line Items]
Outstanding Principal		531,000,000	531,000,000
Discount	[1]	0	0
Total Debt		531,000,000	531,000,000
Senior Notes | Senior notes due in 2020
Debt Instrument [Line Items]
Less: Current portion of long-term debt	[3]	800,000,000	0
Revolving Credit Facility
Debt Instrument [Line Items]
Unamortized debt expense related to Revolving Credit Facility		3,000,000	3,000,000
Commercial Paper
Debt Instrument [Line Items]
Short-term debt	[4]	214,000,000	250,000,000
Discount	[1]	$ 0	$ 0

[1] Unamortized discount on long-term debt is amortized over the life of the respective debt.

[2] As of both March 31, 2021 and December 31, 2020, there was an additional $3 million of unamortized debt expense related to the Revolving Credit Facility included in Other assets, not included above.

[3] As of March 31, 2021, Current portion of long-term debt included $800 million outstanding balance of the 2019 Term Loan Agreement.

[4] Short-term debt includes $214 million and $250 million of outstanding commercial paper as of March 31, 2021 and December 31, 2020, respectively.

XML

Debt - Narrative (Details)				3 Months Ended
		Jan. 29, 2019 USD ($)	Apr. 06, 2018 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Commercial paper, authorized				$ 1,400,000,000
Commercial paper				$ 214,000,000	$ 250,000,000
2019 Term Loan Agreement
Debt Instrument [Line Items]
Weighted average interest rate percentage				2.08%
Number of times option maybe exercised to extend term of Term Loan Facility		2
Debt Instrument, Term of Extension Period		1 year
Debt Instrument, Principle Advance				$ 800,000,000
LIBOR | 2019 Term Loan Agreement
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				1.25%
Minimum | Eurodollar | 2019 Term Loan Agreement
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		0.75%
Minimum | Base Rate | 2019 Term Loan Agreement
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		0.00%
Maximum | Eurodollar | 2019 Term Loan Agreement
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.50%
Maximum | Base Rate | 2019 Term Loan Agreement
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		0.50%
Senior Notes | Senior Notes including 2024 Notes, 2027 Notes, 2028 Notes, 2029 Notes and 2044 Notes
Debt Instrument [Line Items]
Debt Instrument, Unamortized discount				$ 7,000,000
Debt Instrument, Debt Issuance Costs, Net				$ 19,000,000
Senior Notes | 2024 Notes
Debt Instrument [Line Items]
Debt Instrument, Interest Rate During Period				4.01%
Senior Notes | 2027 Notes
Debt Instrument [Line Items]
Debt Instrument, Interest Rate During Period				4.56%
Senior Notes | 2028 Notes
Debt Instrument [Line Items]
Debt Instrument, Interest Rate During Period				5.19%
Senior Notes | 2029 Notes
Debt Instrument [Line Items]
Debt Instrument, Interest Rate During Period				4.30%
Senior Notes | 2044 Notes
Debt Instrument [Line Items]
Debt Instrument, Interest Rate During Period				5.08%
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 1,750,000,000
Duration of term loan facility (in years)			5 years
Increase in maximum borrowing capacity			$ 875,000,000
Number of times option maybe exercised to extend term of Term Loan Facility			2
Debt Instrument, Term of Extension Period			1 year
Letters of credit principal advances				$ 0
Letters of credit outstanding amount				3,000,000
Remaining borrowing capacity				$ 980,000,000
Commitment fee percentage				0.20%
Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Applicable margin percentage				1.50%
Commercial Paper
Debt Instrument [Line Items]
Commercial paper	[1]			$ 214,000,000	$ 250,000,000
Weighted average interest rate percentage				0.73%

[1] Short-term debt includes $214 million and $250 million of outstanding commercial paper as of March 31, 2021 and December 31, 2020, respectively.

XML

Derivative Instruments and Hedging Activities Quantitative Disclosures Related to Derivative Instruments (Details) - Not Designated as Hedging Instrument bbl in Thousands, MMBTU in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2021 MMBTU bbl	Dec. 31, 2020 MMBTU bbl
Natural gas, Financial fixed futures/swaps | Purchases
Derivative [Line Items]
Derivative, gross notional volume (TBtu) | MMBTU	[1]	1	0
Natural gas, Financial fixed futures/swaps | Sales
Derivative [Line Items]
Derivative, gross notional volume (TBtu) | MMBTU	[1]	17	18
Natural gas, Financial basis futures/swaps | Purchases
Derivative [Line Items]
Derivative, gross notional volume (TBtu) | MMBTU	[1]	1	0
Natural gas, Financial basis futures/swaps | Sales
Derivative [Line Items]
Derivative, gross notional volume (TBtu) | MMBTU	[1]	34	27
Natural gas, Financial swaptions | Purchases
Derivative [Line Items]
Derivative, gross notional volume (TBtu) | MMBTU	[1],[2]	0	0
Natural gas, Financial swaptions | Sales
Derivative [Line Items]
Derivative, gross notional volume (TBtu) | MMBTU	[1],[2]	5	7
Crude oil, Financial Futures/swaps | Purchases
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	[3]	0	0
Crude oil, Financial Futures/swaps | Sales
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	[3]	420	465
Crude oil, Financial options | Purchases
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	[2],[3]	0	0
Crude oil, Financial options | Sales
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	[2],[3]	150	90
Natural gas liquids, Financial Futures/swaps | Purchases
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	[4]	435	855
Natural gas liquids, Financial Futures/swaps | Sales
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	[4]	1,155	1,210
Natural gas liquids, Options | Purchases
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	[4]	0	0
Natural gas liquids, Options | Sales
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Volume	[4]	30	45
Natural gas
Derivative [Line Items]
Percent of contract with durations of one year or less		99.20%	95.70%
Percent of contracts with durations of more than one year and less than two years		0.80%	4.30%
Crude oil (for condensate)
Derivative [Line Items]
Percent of contract with durations of one year or less		89.50%	100.00%
Percent of contracts with durations of more than one year and less than two years		10.50%
Natural gas liquids
Derivative [Line Items]
Percent of contract with durations of one year or less		97.20%	100.00%
Percent of contracts with durations of more than one year and less than two years		2.80%

[1] As of March 31, 2021, 99.2% of the natural gas contracts had durations of one year or less and 0.8% had durations of more than one year and less than two years. As of December 31, 2020, 95.7% of the natural gas contracts had durations of one year or less and 4.3% had durations of more than one year and less than two years.

[2] The notional volume contains a combined derivative instrument consisting of a fixed price swap and a sold option, which gives the counterparties the right, but not the obligation, to increase the notional volume hedged under the fixed price swap until the option expiration date. The notional volume represents the volume prior to option exercise.

[3] As of March 31, 2021, 89.5% of the crude oil (for condensate) contracts had durations of one year or less and 10.5% had durations of more than one year and less than two years. As of December 31, 2020, 100.0% of the crude oil (for condensate) contracts had durations of one year or less.

[4] As of March 31, 2021, 97.2% of the natural gas liquids contracts had durations of one year or less and 2.8% had durations of more than one year and less than two years. As of December 31, 2020, 100.0% of the natural gas liquids contracts had durations of one year or less.

XML

Derivative Instruments and Hedging Activities - Derivative Instruments Designated as Hedging Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Designated as Hedging Instrument | Interest Rate Swap
Derivative [Line Items]
Interest rate swaps	$ 300	$ 300

XML

Derivative Instruments and Hedging Activities - Balance Sheet Location (Details) - USD ($) $ in Millions		Mar. 31, 2021	Dec. 31, 2020
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative asset	[1]	$ 11	$ 19
Derivative liability	[1]	23	21
Interest rate swaps | Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset	[2]	0	0
Interest rate swaps | Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	[2]	5	6
Natural gas | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset		1	2
Natural gas | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability		3	2
Natural gas | Financial swaptions | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset		1	1
Natural gas | Financial swaptions | Not Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability		2	2
Crude oil (for condensate) | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset		0	1
Crude oil (for condensate) | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability		10	13
Crude oil (for condensate) | Financial swaptions | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset		0	0
Crude oil (for condensate) | Financial swaptions | Not Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability		1	0
Natural gas liquids | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset		9	15
Natural gas liquids | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability		6	3
Natural gas liquids | Financial swaptions | Not Designated as Hedging Instrument | Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset		0	0
Natural gas liquids | Financial swaptions | Not Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability		$ 1	$ 1

[1] See Note 11 for a reconciliation of the Partnership’s commodity derivatives fair value to the Partnership’s Condensed Consolidated Balance Sheets as of March 31, 2021 and December 31, 2020.

[2] All interest rate derivative instruments that were designated as cash flow hedges are considered Level 2 as of March 31, 2021 and December 31, 2020.

XML

Derivative Instruments and Hedging Activities - Amounts Recognized in Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Change in fair value of commodity derivatives	$ (10)	$ 10
Realized gain (loss) on commodity derivatives	(4)	10
Gain (loss) on commodity derivative activity	(14)	20
Cash collateral posted	0
Cash collateral required if ratings are lowered	1
Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swaps losses	(1)	0
Natural gas | Financial futures/swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on commodity derivative activity	(2)	4
Natural gas | Financial swaptions
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on commodity derivative activity	0	(1)
Natural gas | Natural gas, Physical purchases/sales
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on commodity derivative activity	0	1
Condensate | Financial futures/swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on commodity derivative activity	(6)	19
Condensate | Financial swaptions
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on commodity derivative activity	(1)	4
Natural gas liquids | Financial futures/swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on commodity derivative activity	$ (5)	$ (7)

XML

Fair Value Measurements - Carrying and Fair Value Amounts (Details) - USD ($)		Mar. 31, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial paper		$ 214,000,000	$ 250,000,000
Carrying Amount | Significant other observable inputs (Level 2) | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Revolving Credit Facility (Level 2)	[1]	0	0
Carrying Amount | Significant other observable inputs (Level 2) | 2019 Term Loan Agreement | 2019 Term Loan Agreement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
2019 Term Loan Agreement (Level 2)		800,000,000	800,000,000
Carrying Amount | Significant other observable inputs (Level 2) | Senior Notes | 2024 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)		600,000,000	600,000,000
Carrying Amount | Significant other observable inputs (Level 2) | Senior Notes | 2027 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)		698,000,000	698,000,000
Carrying Amount | Significant other observable inputs (Level 2) | Senior Notes | 2028 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)		796,000,000	795,000,000
Carrying Amount | Significant other observable inputs (Level 2) | Senior Notes | 2029 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)		546,000,000	546,000,000
Carrying Amount | Significant other observable inputs (Level 2) | Senior Notes | 2044 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)		531,000,000	531,000,000
Fair Value | Significant other observable inputs (Level 2) | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Revolving Credit Facility (Level 2)	[1]	0	0
Fair Value | Significant other observable inputs (Level 2) | 2019 Term Loan Agreement | 2019 Term Loan Agreement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
2019 Term Loan Agreement (Level 2)		800,000,000	800,000,000
Fair Value | Significant other observable inputs (Level 2) | Senior Notes | 2024 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)		639,000,000	612,000,000
Fair Value | Significant other observable inputs (Level 2) | Senior Notes | 2027 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)		758,000,000	709,000,000
Fair Value | Significant other observable inputs (Level 2) | Senior Notes | 2028 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)		884,000,000	817,000,000
Fair Value | Significant other observable inputs (Level 2) | Senior Notes | 2029 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)		568,000,000	544,000,000
Fair Value | Significant other observable inputs (Level 2) | Senior Notes | 2044 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)		527,000,000	499,000,000
Commercial Paper
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial paper	[2]	$ 214,000,000	$ 250,000,000

[1] Borrowing capacity is effectively reduced by our borrowings outstanding under the commercial paper program. $214 million and $250 million of commercial paper was outstanding as of March 31, 2021 and December 31, 2020, respectively.

[2] Short-term debt includes $214 million and $250 million of outstanding commercial paper as of March 31, 2021 and December 31, 2020, respectively.

XML

Fair Value Measurements - Fair Value Hierarchy (Details) - USD ($) $ in Millions		Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Retained fuel due from shippers		$ 19	$ 19
Retained fuel due to shippers		3	3
Commodity Contracts | Recurring Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, total fair value		11	19
Liabilities, total fair value		23	21
Asset netting adjustments		(11)	(19)
Liability netting adjustments		(11)	(19)
Total assets		0	0
Total Liabilities		12	2
Commodity Contracts | Recurring Measurement | Quoted market prices in active market for identical assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets		1	2
Liabilities		10	14
Commodity Contracts | Recurring Measurement | Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets		10	17
Liabilities		13	7
Gas Imbalances | Recurring Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, total fair value	[1],[2]	30	23
Liabilities, total fair value	[2],[3]	10	16
Asset netting adjustments	[1],[2]	0	0
Liability netting adjustments	[2],[3]	0	0
Total assets	[1],[2]	30	23
Total Liabilities	[2],[3]	10	16
Gas Imbalances | Recurring Measurement | Quoted market prices in active market for identical assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	[1],[2]	0	0
Liabilities	[2],[3]	0	0
Gas Imbalances | Recurring Measurement | Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	[1],[2]	30	23
Liabilities	[2],[3]	$ 10	$ 16

[1] Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $19 million and $19 million at March 31, 2021 and December 31, 2020, respectively, which fuel reserves are based on the value of natural gas at the time the imbalance was created, and which are not subject to revaluation at fair market value.

[2] The Partnership uses the market approach to fair value its gas imbalance assets and liabilities at individual, or where appropriate an average of, current market indices applicable to the Partnership’s operations, not to exceed net realizable value. There were no netting adjustments as of March 31, 2021 and December 31, 2020.

[3] Gas imbalance liabilities exclude fuel reserves for over retained fuel due to shippers of $3 million and $3 million at March 31, 2021 and December 31, 2020, respectively, which fuel reserves are based on the value of natural gas at the time the imbalance was created, and which are not subject to revaluation at fair market value.

XML

Supplemental Disclosure of Cash Flow Information - Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Interest, net of capitalized interest	$ 32	$ 43
Income Taxes Paid, Net	(2)	0
Accounts payable related to capital expenditures	7	8
Lease liabilities related to derecognition of right-of-use assets	0	4
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	7,181	7,352	$ 7,095	$ 7,409
Common Unit [Member] | Partners' Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	6,798	$ 6,972	$ 6,713	7,013
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Partners' Capital, Including Portion Attributable to Noncontrolling Interest				(3)
Cumulative Effect, Period of Adoption, Adjustment | Common Unit [Member] | Partners' Capital
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Partners' Capital, Including Portion Attributable to Noncontrolling Interest	$ 0			$ (3)

XML

Related Party Transactions - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Related Party Transaction [Line Items]
Partnership's revenues from affiliated companies as a percent of total revenues	7.00%	8.00%
Subsidiary of Common Parent | CenterPoint | Three Services Included in Transportation and Storage Agreements
Related Party Transaction [Line Items]
Period of written notice	180 days
CenterPoint and OGE Energy | Minimum
Related Party Transaction [Line Items]
Period notice of termination for reimbursements for all employee costs	90 days
OGE Energy | Defined Benefit and Retiree Medical Plans
Related Party Transaction [Line Items]
Expense reimbursement, 2018 and thereafter	$ 5
OGE Energy | Certain Services and Support Functions
Related Party Transaction [Line Items]
Expense reimbursement annual caps	1
CenterPoint | Certain Services and Support Functions
Related Party Transaction [Line Items]
Expense reimbursement annual caps	$ 1

XML

Related Party Transactions - Related Party Activity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Related Party Transaction [Line Items]
Revenues from affiliated companies	$ 68	$ 51
Cost of natural gas purchases from affiliated companies	31	9
CenterPoint
Related Party Transaction [Line Items]
Cost of natural gas purchases from affiliated companies	0	1
CenterPoint | Gas Transportation and Storage
Related Party Transaction [Line Items]
Revenues from affiliated companies	27	37
OGE Energy
Related Party Transaction [Line Items]
Cost of natural gas purchases from affiliated companies	31	8
OGE Energy | Gas Transportation and Storage
Related Party Transaction [Line Items]
Revenues from affiliated companies	10	9
OGE Energy | Gas Sales
Related Party Transaction [Line Items]
Revenues from affiliated companies	31	5
OGE Energy | Seconded Employee Costs
Related Party Transaction [Line Items]
Seconded employee costs	$ 4	$ 3

XML

Commitments and Contingencies (Details) - USD ($) $ in Millions	Sep. 13, 2018	Jan. 01, 2017	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Gathering and processing agreement term (in years)		10 years
Minimum volume commitment fee			$ 164
Minimum volume commitment fees remaining in current year			15
Minimum volume commitment fees per year from 2022 through 2027			23
Minimum volume commitment fees in 2028			11
Estimated Cost to Complete Pipeline Project			$ 540
Firm transportation service agreement term (in years)	20 years

XML

Equity-Based Compensation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 4	$ 4
Performance units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	2	2
Phantom units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 2	$ 2

XML

Equity-Based Compensation - Performance Units (Details) - Performance units	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of units granted | shares	1,453,897	[1]
Fair value of units granted | $ / shares	$ 10.26	[1]
Expected distribution yield	12.90%
Expected price volatility	100.00%
Risk-free interest rate	0.27%
Expected life of units (in years)	3 years

[1] Performance units represents the target number of performance units granted. The actual number of performance units earned, if any, is dependent upon performance and may range from 0% to 200% of the target.

XML

Equity-Based Compensation - Phantom Units (Details) - Phantom units	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Phantom Units granted | shares	1,356,672	[1]
Fair value of phantom units granted (in dollars per share)	$ 6.86	[1]
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of phantom units granted (in dollars per share)	5.41
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of phantom units granted (in dollars per share)	$ 6.87

[1] Performance units represents the target number of performance units granted. The actual number of performance units earned, if any, is dependent upon performance and may range from 0% to 200% of the target.

XML

Equity-Based Compensation - Equity Units Activity (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) $ / shares shares
Performance units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Units Outstanding (in units) | shares	1,765,508
Granted (in units) | shares	1,453,897	[1]
Vested (in units) | shares	(389,817)	[2]
Forfeited (in units) | shares	(32,625)
Units Outstanding (in units) | shares	2,796,963
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Units Outstanding (in dollars per unit)	$ 13.10
Granted (in dollars per unit)	10.26	[1]
Vested (in dollars per unit)	17.70	[2]
Forfeited (in dollars per unit)	10.00
Units Outstanding (in dollars per unit)	$ 11.02
Aggregate Intrinsic Value of Units Outstanding | $	$ 18
Performance units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Payout percentage	0.00%
Performance units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Payout percentage	200.00%
Performance units | Annual Grant in 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in units) | shares	389,817
Phantom units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Units Outstanding (in units) | shares	1,790,845
Granted (in units) | shares	1,356,672	[1]
Vested (in units) | shares	(461,824)	[2]
Forfeited (in units) | shares	(94,669)
Units Outstanding (in units) | shares	2,591,024
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Units Outstanding (in dollars per unit)	$ 10.29
Granted (in dollars per unit)	6.86	[1]
Vested (in dollars per unit)	13.11	[2]
Forfeited (in dollars per unit)	8.70
Units Outstanding (in dollars per unit)	$ 8.05
Aggregate Intrinsic Value of Units Outstanding | $	$ 17
Phantom units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted (in dollars per unit)	$ 5.41
Phantom units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted (in dollars per unit)	$ 6.87

[1] Performance units represents the target number of performance units granted. The actual number of performance units earned, if any, is dependent upon performance and may range from 0% to 200% of the target.

[2] Performance units vested as of March 31, 2021 include 389,817 units from the 2018 annual grant, which were approved by the Board of Directors in 2018 and, based on the level of achievement of a performance goal established by the Board of Directors over the performance period of January 1, 2018 through December 31, 2020, no performance units vested.

XML

Equity-Based Compensation - Unrecognized Compensation Cost (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost (In millions)	$ 35
Performance units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost (In millions)	$ 21
Weighted Average Period for Recognition (In years)	2 years 3 months
Phantom units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost (In millions)	$ 14
Weighted Average Period for Recognition (In years)	2 years 25 days
Long Term Incentive Plan | Common Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance | shares	3,105,706

XML

Reportable Segments - Schedule of Financial Data for Business Segments and Services (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2
Total Revenues	$ 970	$ 648
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	519	226
Operation and maintenance, General and administrative	121	126
Depreciation and amortization	106	104
Impairments of property, plant and equipment and goodwill	0	28
Taxes other than income tax	18	18
Operating Income	206	146
Total assets	11,764		$ 11,729
Capital expenditures	80	54
Operating Segments | Gathering and Processing
Segment Reporting Information [Line Items]
Total Revenues	624	477
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	398	211
Operation and maintenance, General and administrative	79	81
Depreciation and amortization	74	74
Impairments of property, plant and equipment and goodwill		28
Taxes other than income tax	11	11
Operating Income	62	72
Total assets	10,780		10,830
Capital expenditures	21	34
Operating Segments | Transportation and Storage
Segment Reporting Information [Line Items]
Total Revenues	482	234
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	257	78
Operation and maintenance, General and administrative	42	45
Depreciation and amortization	32	30
Impairments of property, plant and equipment and goodwill		0
Taxes other than income tax	7	7
Operating Income	144	74
Total assets	5,789		5,729
Capital expenditures	59	20
Eliminations
Segment Reporting Information [Line Items]
Total Revenues	(136)	(63)
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	(136)	(63)
Operation and maintenance, General and administrative	0	0
Depreciation and amortization	0	0
Impairments of property, plant and equipment and goodwill		0
Taxes other than income tax	0	0
Operating Income	0	0
Total assets	(4,805)		$ (4,830)
Capital expenditures	0	0
Product
Segment Reporting Information [Line Items]
Total Revenues	627	288
Product | Operating Segments | Gathering and Processing
Segment Reporting Information [Line Items]
Total Revenues	428	275
Product | Operating Segments | Transportation and Storage
Segment Reporting Information [Line Items]
Total Revenues	332	75
Product | Eliminations
Segment Reporting Information [Line Items]
Total Revenues	(133)	(62)
Natural Gas, Gathering, Transportation, Marketing and Processing
Segment Reporting Information [Line Items]
Total Revenues	343	360
Natural Gas, Gathering, Transportation, Marketing and Processing | Operating Segments | Gathering and Processing
Segment Reporting Information [Line Items]
Total Revenues	196	202
Natural Gas, Gathering, Transportation, Marketing and Processing | Operating Segments | Transportation and Storage
Segment Reporting Information [Line Items]
Total Revenues	150	159
Natural Gas, Gathering, Transportation, Marketing and Processing | Eliminations
Segment Reporting Information [Line Items]
Total Revenues	$ (3)	$ (1)