10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

 _______________________________________

FORM 10-Q

 _______________________________________

þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES AND EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2017

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 jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

One Leadership Square

211 North Robinson Avenue

Suite 150

Oklahoma City, Oklahoma 73102

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code: (405) 525-7788

 _______________________________________

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. þ Yes ¨ No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). þ 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	þ	Accelerated filer	¨
Non-accelerated filer	¨ (Do not check if a smaller reporting company)	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 þ No

As of April 14, 2017, there were 224,534,129 common units and 207,855,430 subordinated units outstanding.

ENABLE MIDSTREAM PARTNERS, LP

FORM 10-Q

TABLE OF CONTENTS

	Page
GLOSSARY OF TERMS	1
FORWARD-LOOKING STATEMENTS	3
Part I - FINANCIAL INFORMATION
Item 1. Financial Statements (Unaudited)
Condensed Consolidated Statements of Income	4
Condensed Consolidated Balance Sheets	5
Condensed Consolidated Statements of Cash Flows	6
Condensed Consolidated Statements of Partners' Equity	7
Notes to Condensed Consolidated Financial Statements	8
Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations	27
Item 3. Quantitative and Qualitative Disclosures About Market Risk	38
Item 4. Controls and Procedures	38
Part II - OTHER INFORMATION
Item 1. Legal Proceedings	39
Item 1A. Risk Factors	39
Item 6. Exhibits	39
Signature	41

 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; and

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

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

Adjusted EBITDA.	A non-GAAP measure calculated as net income attributable to limited partners plus depreciation and amortization expense, interest expense, income tax expense, distributions received from equity method affiliate in excess of equity earnings, non-cash equity based compensation, impairments, changes in fair value of derivatives, noncontrolling interest share of Adjusted EBITDA and certain other non-cash gains and losses (including gains and losses on sales of assets and write-downs of materials and supplies).
Adjusted interest expense.	A non-GAAP measure calculated as interest expense plus amortization of premium on long-term debt and capitalized interest, less amortization of debt expense and discount.
Annual Report.	Annual Report on Form 10-K for the year ended December 31, 2016.
ArcLight.	ArcLight Capital Partners, LLC, a Delaware limited liability company, its affiliated entities ArcLight Energy Partners Fund V, L.P., ArcLight Energy Partners Fund IV, L.P., Bronco Midstream Partners, L.P., Bronco Midstream Infrastructure LLC and Enogex Holdings LLC, and their respective general partners and subsidiaries.
ASU.	Accounting Standards Update.
Barrel.	42 U.S. gallons of petroleum products.
Bbl.	Barrel.
Bbl/d.	Barrels per day.
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.
CenterPoint Energy.	CenterPoint Energy, Inc., a Texas corporation, and its subsidiaries.
CERC.	CenterPoint Energy Resources Corp., a Delaware corporation.
Condensate.	A natural gas liquid with a low vapor pressure, mainly composed of propane, butane, pentane and heavier hydrocarbon fractions.
DCF.	A non-GAAP measure calculated as Adjusted EBITDA, as further adjusted for Series A Preferred Unit distributions, Adjusted interest expense, maintenance capital expenditures and current income taxes.
Distribution coverage ratio.	A non-GAAP measure calculated as DCF divided by distributions related to common and subordinated unitholders.
DRIP.	Distribution Reinvestment Plan entered into on June 23, 2016, which offers owners of our common and subordinated units the ability to purchase additional common units by reinvesting all or a portion of the cash distributions paid to them on their common or subordinated units.
EGT.	Enable Gas Transmission, LLC, a wholly owned subsidiary of the Partnership that operates a 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 and Kansas.
Enable GP.	Enable GP, LLC, a Delaware limited liability company and the general partner of Enable Midstream Partners, LP.
EOIT.	Enable Oklahoma Intrastate Transmission, LLC, formerly Enogex LLC, a wholly owned subsidiary of the Partnership that operates a 2,200-mile intrastate pipeline that provides natural gas transportation and storage services to customers in Oklahoma.
Exchange Act.	Securities Exchange Act of 1934, as amended.
FASB.	Financial Accounting Standards Board.
FERC.	Federal Energy Regulatory Commission.
Fractionation.	The separation of the heterogeneous mixture of extracted NGLs into individual components for end-use sale.
GAAP.	Generally accepted accounting principles in the United States.
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.

1

IPO.	Initial public offering of Enable Midstream Partners, LP.
LDC.	Local distribution company involved in the delivery of natural gas to consumers within a specific geographic area.
LIBOR.	London Interbank Offered Rate.
MBbl.	Thousand barrels.
MBbl/d.	Thousand barrels per day.
MFA.	Master Formation Agreement dated as of March 14, 2013.
MMcf.	Million cubic feet of natural gas.
MMcf/d.	Million cubic feet per day.
MRT.	Enable Mississippi River Transmission, LLC, a wholly owned subsidiary of the Partnership that operates a 1,600-mile interstate pipeline that provides natural gas transportation and storage services principally in Texas, Arkansas, Louisiana, Missouri and Illinois.
NGLs.	Natural gas liquids, which are the hydrocarbon liquids contained within natural gas including condensate.
NYMEX.	New York Mercantile Exchange.
OGE Energy.	OGE Energy Corp., an Oklahoma corporation, and its subsidiaries.
Partnership.	Enable Midstream Partners, LP, and its subsidiaries.
Partnership Agreement.	Fourth Amended and Restated Agreement of Limited Partnership of Enable Midstream Partners, LP dated as of June 22, 2016.
Revolving Credit Facility.	$1.75 billion senior unsecured revolving credit facility.
SEC.	Securities and Exchange Commission.
Securities Act.	Securities Act of 1933, as amended.
Series A Preferred Units.	10% Series A Fixed-to-Floating Non-Cumulative Redeemable Perpetual Preferred Units representing limited partner interests in the Partnership.
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.
TBtu.	Trillion British thermal units.
TBtu/d.	Trillion British thermal units per day.
WTI.	West Texas Intermediate.
2015 Term Loan Agreement.	$450 million unsecured term loan agreement.
2019 Notes.	$500 million 2.400% senior notes due 2019.
2024 Notes.	$600 million 3.900% senior notes due 2024.
2027 Notes.	$700 million 4.400% senior notes due 2027.
2044 Notes.	$550 million 5.000% senior notes due 2044.

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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. 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.

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 this report and in our Annual Report on Form 10-K for the year ended December 31, 2016. 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:

• changes in general economic conditions;

• 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;

• 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 our General Partner;

• 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;

• interest rates;

• 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;

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

• the effects of future litigation; 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.

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PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

ENABLE MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(unaudited)

	Three Months Ended   March 31,
	2017			2016
	(In millions, except per unit data)
Revenues (including revenues from affiliates (Note 11)):
Product sales	$	386		$	245
Service revenue	280			264
Total Revenues	666			509
Cost and Expenses (including expenses from affiliates (Note 11)):
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	308			195
Operation and maintenance	89			95
General and administrative	25			20
Depreciation and amortization	88			81
Taxes other than income taxes	16			15
Total Cost and Expenses	526			406
Operating Income	140			103
Other Income (Expense):
Interest expense (including expenses from affiliates (Note 11))	(27		)	(23		)
Equity in earnings of equity method affiliate	7			7
Other, net	1			—
Total Other Expense	(19		)	(16		)
Income Before Income Taxes	121			87
Income tax expense	1			1
Net Income	$	120		$	86
Less: Net income attributable to noncontrolling interest	—			—
Net Income Attributable to Limited Partners	$	120		$	86
Less: Series A Preferred Unit distributions (Note 4)	9			—
Net Income Attributable to Common and Subordinated Units (Note 3)	$	111		$	86
Basic earnings per unit (Note 3)
Common units	$	0.26		$	0.21
Subordinated units	$	0.25		$	0.20
Diluted earnings per unit (Note 3)
Common units	$	0.26		$	0.19
Subordinated units	$	0.25		$	0.20

See Notes to the Unaudited Condensed Consolidated Financial Statements

4

ENABLE MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

	March 31, 2017		December 31, 2016
	(In millions)
Current Assets:
Cash and cash equivalents	$	17	$	6
Restricted cash	14		17
Accounts receivable, net of allowance for doubtful accounts	231		249
Accounts receivable—affiliated companies	21		13
Inventory	40		41
Gas imbalances	24		41
Other current assets	28		29
Total current assets	375		396
Property, Plant and Equipment:
Property, plant and equipment	11,622		11,567
Less accumulated depreciation and amortization	1,496		1,424
Property, plant and equipment, net	10,126		10,143
Other Assets:
Intangible assets, net	299		306
Investment in equity method affiliate	325		329
Other	36		38
Total other assets	660		673
Total Assets	$	11,161	$	11,212
Current Liabilities:
Accounts payable	$	128	$	181
Accounts payable—affiliated companies	3		3
Taxes accrued	26		30
Gas imbalances	18		35
Other	104		113
Total current liabilities	279		362
Other Liabilities:
Accumulated deferred income taxes, net	10		10
Regulatory liabilities	20		19
Other	34		34
Total other liabilities	64		63
Long-Term Debt	3,047		2,993
Commitments and Contingencies (Note 12)
Partners’ Equity:
Series A Preferred Units (14,520,000 issued and outstanding at March 31, 2017 and December 31, 2016)	362		362
Common units (224,532,260 issued and outstanding at March 31, 2017 and 224,535,454 issued and outstanding at December 31, 2016, respectively)	3,727		3,737
Subordinated units (207,855,430 issued and outstanding at March 31, 2017 and December 31, 2016, respectively)	3,670		3,683
Noncontrolling interest	12		12
Total Partners’ Equity	7,771		7,794
Total Liabilities and Partners’ Equity	$	11,161	$	11,212

See Notes to the Unaudited Condensed Consolidated Financial Statements

5

ENABLE MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Three Months Ended   March 31,
	2017			2016
	(In millions)
Cash Flows from Operating Activities:
Net income	$	120		$	86
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	88			81
Deferred income taxes	1			—
Loss on sale/retirement of assets	1			1
Equity in earnings of equity method affiliate	(7		)	(7		)
Return on investment in equity method affiliate	7			7
Equity based compensation	4			2
Amortization of debt costs and discount (premium)	(1		)	(1		)
Changes in other assets and liabilities:
Accounts receivable, net	18			19
Accounts receivable—affiliated companies	(8		)	5
Inventory	1			8
Gas imbalance assets	17			3
Other current assets	1			—
Other assets	2			1
Accounts payable	(55		)	(84		)
Accounts payable—affiliated companies	—			(3		)
Gas imbalance liabilities	(17		)	(18		)
Other current liabilities	(16		)	15
Other liabilities	—			2
Net cash provided by operating activities	156			117
Cash Flows from Investing Activities:
Capital expenditures	(61		)	(130		)
Proceeds from sale of assets	1			—
Return of investment in equity method affiliate	4			13
Net cash used in investing activities	(56		)	(117		)
Cash Flows from Financing Activities:
Proceeds from long term debt, net of issuance costs	691			—
Proceeds from revolving credit facility	264			495
Repayment of revolving credit facility	(900		)	(90		)
Decrease in short-term debt	—			(236		)
Repayment of notes payable—affiliated companies	—			(363		)
Proceeds from issuance of Series A Preferred Units, net of issuance costs	—			362
Distributions	(147		)	(134		)
Net cash provided by (used in) financing activities	(92		)	34
Net Increase in Cash, Cash Equivalents and Restricted Cash	8			34
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	23			4
Cash, Cash Equivalents and Restricted Cash at End of Period	$	31		$	38

See Notes to the Unaudited Condensed Consolidated Financial Statements

6

ENABLE MIDSTREAM PARTNERS, LP

CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS’ EQUITY

(Unaudited)

	Series A Preferred Units				Common Units				Subordinated  Units				Noncontrolling Interest		Total Partners’ Equity
	Units	Value			Units	Value			Units	Value			Value		Value
	(In millions)
Balance as of December 31, 2015	—	$	—		214	$	3,714		208	$	3,805		$	12	$	7,531
Net income	—	—			—	44			—	42			—		86
Issuance of Series A Preferred Units	15	362			—	—			—	—			—		362
Distributions	—	—			—	(68		)	—	(66		)	—		(134		)
Equity based compensation, net of units for employee taxes	—	—			—	2			—	—			—		2
Balance as of March 31, 2016	15	$	362		214	$	3,692		208	$	3,781		$	12	$	7,847
Balance as of December 31, 2016	15	$	362		224	$	3,737		208	$	3,683		$	12	$	7,794
Net income	—	9			—	58			—	53			—		120
Distributions	—	(9		)	—	(72		)	—	(66		)	—		(147		)
Equity based compensation, net of units for employee taxes	—	—			—	4			—	—			—		4
Balance as of March 31, 2017	15	$	362		224	$	3,727		208	$	3,670		$	12	$	7,771

See Notes to the Unaudited Condensed Consolidated Financial Statements

7

ENABLE MIDSTREAM PARTNERS, LP

NOTES TO THE UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(1) Summary of Significant Accounting Policies

Organization

Enable Midstream Partners, LP (Partnership) is a Delaware limited partnership formed on May 1, 2013 by CenterPoint Energy, OGE Energy and ArcLight. The Partnership’s assets and operations are organized into two reportable segments: (i) gathering and processing and (ii) transportation and storage. The gathering and processing segment primarily provides natural gas and crude oil gathering and natural gas processing services to our producer 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. The Partnership’s 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 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, 2017, CenterPoint Energy held approximately 54.1% of the Partnership’s common and subordinated units, or 94,151,707 common units and 139,704,916 subordinated units, and OGE Energy held approximately 25.7% of the Partnership’s common and subordinated units, or 42,832,291 common units and 68,150,514 subordinated units. Additionally, CenterPoint Energy holds 14,520,000 Series A Preferred Units. See Note 4 for further information related to the 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 (Enable GP) on an annual or continuing basis and may not remove Enable GP 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, 2017, the Partnership owned a 50% interest in SESH. See Note 6 for further discussion of SESH.

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.  

 These condensed consolidated financial statements and the related financial statement disclosures 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 and (d) acquisitions and dispositions of businesses, assets and other interests.

For a description of the Partnership’s reportable segments, see Note 14.

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

8

statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Restricted Cash

Restricted cash consists of cash which is restricted by agreements with third parties. The Condensed Consolidated Balance Sheets have $14 million and $17 million of restricted cash as of March 31, 2017 and December 31, 2016, respectively.

Accounts Receivable and 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 upon specific identification and estimates of future uncollectable amounts. On an ongoing basis, we evaluate our customers’ financial strength 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 at least quarterly, giving consideration to historical bad debt write-offs, the aging of receivables and specific customer circumstances that may impact their ability to pay the amounts due. Based on this review, management determined that a $4 million and $3 million allowance for doubtful accounts was required as of March 31, 2017 and December 31, 2016, respectively.

(2) New Accounting Pronouncements

Adopted Accounting Standards

Share-Based Compensation

In March 2016, the FASB issued ASU No. 2016-09, “Compensation—Stock Compensation (Topic 718).” This standard makes several modifications to Topic 718 related to the accounting for forfeitures, employer tax withholding on share-based compensation and the financial statement presentation of excess tax benefits or deficiencies. ASU 2016-09 also clarifies the statement of cash flows presentation for certain components of share-based awards. The standard is effective for interim and annual reporting periods beginning after December 15, 2016. The Partnership adopted the amendment in the first quarter of 2017, which had no material impact on our Condensed Consolidated Financial Statements and related disclosures.

Statement of Cash Flows

In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments.” This standard is intended to reduce existing diversity in practice in how certain transactions are presented on the statement of cash flows. The standard is effective for interim and annual reporting periods beginning after December 15, 2017, although early adoption is permitted. The Partnership adopted ASU No. 2016-15 in the first quarter of 2017, which had no material impact on our Condensed Consolidated Financial Statements and related disclosures.

Accounting Standards to be Adopted in Future Periods

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” which supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605).” Topic 606 is based on the core principle that revenue is recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Topic 606 also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract.

Topic 606 is effective for fiscal years beginning after December 15, 2017, and interim periods within those years, with early adoption permitted in 2017. However, we do not plan to adopt the standard early. Entities will have the option to apply the standard using a full retrospective or modified retrospective adoption method. The Partnership expects to adopt this ASU using the modified retrospective method. Our evaluation of the impact on our Consolidated Financial Statements and related disclosures is ongoing and not complete. In connection with our assessment work, we formed an implementation work team, completed training on the Topic 606 revenue recognition model and are continuing our review of contracts relative to the provisions of Topic 606.

9

Leases

In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” This standard requires, among other things, that lessees recognize the following for all leases (with the exception of short-term leases) at the commencement date: (1) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Lessees and lessors must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Partnership expects to adopt this standard by the first quarter of 2019 and is currently evaluating the impact of this standard on our Condensed Consolidated Financial Statements and related disclosures. In connection with our assessment work, we formed an implementation work team and are continuing our review of our contracts relative to the provisions of the lease standard.

Financial Instruments—Credit Losses

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” This standard requires entities to measure all expected credit losses of financial assets held at a reporting date based on historical experience, current conditions, and reasonable and supportable forecasts in order to record credit losses in a more timely matter. ASU 2016-13 also amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The standard is effective for interim and annual reporting periods beginning after December 15, 2019, although early adoption is permitted for interim and annual periods beginning after December 15, 2018. The Partnership does not expect the adoption of this standard to have a material impact on our Condensed Consolidated Financial Statements and related disclosures.

Income Taxes

In October 2016, the FASB issued ASU No. 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory.” This standard requires entities to recognize the tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The standard is effective for interim and annual reporting periods beginning after December 15, 2017, although early adoption is permitted as of the beginning of an annual period (i.e., only in the first interim period). The guidance requires application using a modified retrospective approach. The Partnership does not expect the adoption of this standard to have a material impact on our Condensed Consolidated Financial Statements and related disclosures.

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(3) Earnings Per Limited Partner Unit

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

	Three Months Ended   March 31,
	2017		2016
	(In millions, except per unit data)
Net income	$	120	$	86
Net income attributable to noncontrolling interest	—		—
Series A Preferred Unit distribution	9		—
General partner interest in net income	—		—
Net income available to common and subordinated unitholders	$	111	$	86
Net income allocable to common units	$	58	$	44
Net income allocable to subordinated units	53		42
Net income available to common and subordinated unitholders	$	111	$	86
Net income allocable to common units	$	58	$	44
Dilutive effect of Series A Preferred Unit distributions	—		—
Diluted net income allocable to common units	58		44
Diluted net income allocable to subordinated units	53		42
Total	$	111	$	86
Basic weighted average number of outstanding
Common units(1)	225		214
Subordinated units	208		208
Total	433		422
Basic earnings per unit
Common units	$	0.26	$	0.21
Subordinated units	$	0.25	$	0.20
Basic weighted average number of outstanding common units	225		214
Dilutive effect of Series A Preferred Units	—		21
Dilutive effect of performance units	1		—
Diluted weighted average number of outstanding common units	226		235
Diluted weighted average number of outstanding subordinated units	208		208
Total	434		443
Diluted earnings per unit
Common units	$	0.26	$	0.19
Subordinated units	$	0.25	$	0.20

____________________

(1) Basic weighted average number of outstanding common units for the three months ended March 31, 2017 includes approximately one million time-based phantom units.

The dilutive effect of the unit-based awards discussed in Note 13 was less than $0.01 per unit during each of the three months ended March 31, 2017 and 2016.

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(4) Partners’ Equity

The Partnership Agreement requires that, within 60 days subsequent to 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 and subordinated unitholders during 2016 and 2017 (in millions, except for per unit amounts):

Quarter Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2017(1)	May 23, 2017	May 30, 2017	$	0.318	$	137
December 31, 2016	February 21, 2017	February 28, 2017	$	0.318	$	137
September 30, 2016	November 14, 2016	November 22, 2016	$	0.318	$	134
June 30, 2016	August 16, 2016	August 23, 2016	$	0.318	$	134
March 31, 2016	May 6, 2016	May 13, 2016	$	0.318	$	134
December 31, 2015	February 2, 2016	February 12, 2016	$	0.318	$	134

_____________________

(1) The board of directors of Enable GP declared this $0.318 per common unit cash distribution on May 2, 2017, to be paid on May 30, 2017, to common and subordinated unitholders of record at the close of business on May 23, 2017.

The Partnership paid or has authorized payment of the following cash distributions to holders of the Series A Preferred Units during 2016 and 2017 (in millions, except for per unit amounts):

Quarter Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2017(1)	May 2, 2017	May 12, 2017	$	0.625	$	9
December 31, 2016	February 10, 2017	February 15, 2017	$	0.625	$	9
September 30, 2016	November 1, 2016	November 14, 2016	$	0.625	$	9
June 30, 2016	August 2, 2016	August 12, 2016	$	0.625	$	9
March 31, 2016 (2)	May 6, 2016	May 13, 2016	$	0.2917	$	4

_____________________

(1) The board of directors of Enable GP declared a $0.625 per Series A Preferred Unit cash distribution on May 2, 2017, to be paid on May 12, 2017, to Series A Preferred unitholders of record at the close of business on May 2, 2017.

(2) The prorated quarterly distribution for the Series A Preferred Units is for a partial period beginning on February 18, 2016, and ending on March 31, 2016, which equates to $0.625 per unit on a full-quarter basis or $2.50 per unit on an annualized basis.

General Partner Interest and Incentive Distribution Rights

Enable GP owns a non-economic general partner interest in the Partnership and thus will not be entitled to distributions that the Partnership makes prior to the liquidation of the Partnership in respect of such general partner interest. Enable GP currently holds incentive distribution rights that entitle it to receive increasing percentages, up to a maximum of 50.0%, of the cash the Partnership distributes from operating surplus (as defined in the Partnership Agreement) in excess of $0.330625 per unit per quarter. The maximum distribution of 50.0% does not include any distributions that Enable GP or its affiliates may receive on common units or subordinated units that they own.

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Subordinated Units

General

As of March 31, 2017, all subordinated units are held by CenterPoint Energy and OGE Energy. These units are considered subordinated because for a period of time, defined by the Partnership Agreement as the subordination period, the subordinated units will not be entitled to receive any distributions until the common units have received distributions of available cash each quarter from operating surplus in an amount equal to the minimum quarterly distribution, plus any arrearages on minimum quarterly distributions on the common units from prior quarters. In addition, the subordinated units are not entitled to arrearages on minimum quarterly distributions. On the expiration of the subordination period, the subordinated units will convert to common units on a one-for-one basis.

Subordination Period

The subordination period began on the closing date of the IPO and expires on the first to occur of the following dates: (1) the first business day following the distribution of available cash in respect of any quarter beginning with the quarter ending June 30, 2017 that the following tests are met: (a) distributions of available cash from operating surplus on each of the outstanding common units and subordinated units equal or exceed $1.15 per unit (the annualized minimum quarterly distribution) for each of the three consecutive, non-overlapping four-quarter periods immediately preceding that date; (b) the adjusted operating surplus generated during each of the three consecutive, non-overlapping four-quarter periods immediately preceding that date equaled or exceeded the sum $1.15 (the annualized minimum quarterly distribution) on all of the common units and subordinated units outstanding during those periods on a fully diluted weighted average basis; and (c) there are no arrearages in the payment of the minimum quarterly distributions on the common units or (2) the first business day following the distribution of available cash in respect of any quarter beginning with the quarter ending June 30, 2015 that the following tests are met: (a) distributions of available cash from operating surplus on each of the outstanding common units and subordinated units equal to or exceeding $1.725 per unit (150% of the annualized minimum quarterly distribution) for the four consecutive quarter period immediately preceding that date; (b) the adjusted operating surplus generated during the four consecutive quarter period immediately preceding that date equaled or exceed $1.725 per unit (150% of the annualized minimum quarterly distribution) on all of the common units and subordinated units outstanding during that period on a fully diluted weighted average basis plus the corresponding incentive distribution rights; and (c) there are no arrearages in the payment of the minimum quarterly distributions on the common units.

Series A Preferred Units

On February 18, 2016, the Partnership completed the private placement of 14,520,000 Series A Preferred Units representing limited partner interests in the Partnership for a cash purchase price of $25.00 per Series A Preferred Unit, resulting in proceeds of $362 million, net of issuance costs. The Partnership incurred approximately $1 million of expenses related to the offering, which is shown as an offset to the proceeds. In connection with the closing of the private placement, the Partnership redeemed approximately $363 million of notes scheduled to mature in 2017 payable to a wholly-owned subsidiary of CenterPoint Energy.

Pursuant to the Partnership Agreement, the Series A Preferred Units:

• rank senior to the Partnership’s common units with respect to the payment of distributions and distribution of assets upon liquidation, dissolution and winding up;

• have no stated maturity;

• are not subject to any sinking fund; and

• will remain outstanding indefinitely unless repurchased or redeemed by the Partnership or converted into its common units in connection with a change of control.

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 to, but not including, the five year anniversary of the original issue date; and thereafter a percentage of the stated liquidation preference equal to the sum of the three-month LIBOR plus 8.5%.

At any time on or after five years after the original issue date, the Partnership may redeem the Series A Preferred Units, in whole or in part, from any source of funds legally available for such purpose, by paying $25.50 per unit plus an amount equal to all accumulated and unpaid distributions thereon to the date of redemption, whether or not declared. In addition, the Partnership (or a third-party with its prior written consent) may redeem the Series A Preferred Units following certain changes in the methodology employed by ratings agencies, changes of control or fundamental transactions as set forth in the Partnership

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Agreement. If, upon a change of control or certain fundamental transactions, the Partnership (or a third-party with its prior written consent) does not exercise this option, then the holders of the Series A Preferred Units have the option to convert the Series A Preferred Units into a number of common units per Series A Preferred Unit as set forth in the Partnership Agreement. The Series A Preferred Units are also required to be redeemed in certain circumstances if they are not eligible for trading on the New York Stock Exchange.

Holders of Series A Preferred Units have no voting rights except for limited voting rights with respect to potential amendments to the Partnership Agreement that have a material adverse effect on the existing terms of the Series A Preferred Units, the issuance by the Partnership of certain securities, approval of certain fundamental transactions and as required by law.

Upon the transfer of any Series A Preferred Unit to a non-affiliate of CenterPoint Energy, the Series A Preferred Units will automatically convert into a new series of preferred units (the Series B Preferred Units) on the later of the date of transfer and the second anniversary of the date of issue. The Series B Preferred Units will have the same terms as the Series A Preferred Units except that unpaid distributions on the Series B Preferred Units will accrue on a cumulative basis until paid.

On February 18, 2016, the Partnership entered into a registration rights agreement with CenterPoint Energy, pursuant to which, among other things, the Partnership gave CenterPoint Energy certain rights to require the Partnership to file and maintain a registration statement with respect to the resale of the Series A Preferred Units and any other series of preferred units or common units representing limited partner interests in the Partnership that are issuable upon conversion of the Series A Preferred Units.

2016 Equity Issuance

On November 29, 2016, the Partnership closed a public offering of 10,000,000 common units at a price to the public of $14.00 per common unit. In connection with the offering, the Partnership, the underwriters and an affiliate of ArcLight entered into an underwriting agreement that provided an option for the underwriters to purchase up to an additional 1,500,000 common units, with 75,719 common units to be sold by the Partnership and 1,424,281 to be sold by the affiliate of ArcLight. The underwriters exercised the option to purchase all of the additional common units, and the Partnership received proceeds (net of underwriting discounts, structuring fees and offering expenses) of $137 million from the offering.

(5) Assessing 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. The Partnership recorded no impairments to long-lived assets in the three months ended March 31, 2017 or 2016. Based upon review of forecasted undiscounted cash flows, none of the asset groups were at risk of failing step one of the impairment test. Commodity price declines, throughput declines, cost increases, regulatory or political environment changes, and other changes in market conditions could reduce forecast undiscounted cash flows.

(6) 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 Spectra Energy Partners, LP 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, Spectra Energy Partners, LP 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 Spectra Energy Partners, LP 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. During the three months ended March 31, 2017 and 2016, the Partnership billed SESH $5 million and $4 million, respectively, associated with these service agreements.

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Equity in Earnings of Equity Method Affiliate:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
SESH	$	7	$	7

Distributions from Equity Method Affiliate:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
SESH (1)	$	11	$	20

____________________

(1) Distributions from equity method affiliate includes a $7 million and $7 million return on investment and a $4 million and $13 million return of investment for the three months ended March 31, 2017 and 2016, respectively.

Summarized financial information of SESH:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Income Statements:
Revenues	$	28	$	29
Operating income	$	17	$	19
Net income	$	13	$	14

(7) Debt

The following table presents the Partnership’s outstanding debt as of March 31, 2017 and December 31, 2016.

	March 31, 2017							December 31, 2016
	Outstanding Principal		Premium (Discount)			Total Debt		Outstanding Principal		Premium (Discount)			Total Debt
	(In millions)
Revolving Credit Facility	$	—	$	—		$	—	$	636	$	—		$	636
2015 Term Loan Agreement	450		—			450		450		—			450
2019 Notes	500		—			500		500		—			500
2024 Notes	600		(1		)	599		600		(1		)	599
2027 Notes	700		(3		)	697		—		—			—
2044 Notes	550		—			550		550		—			550
EOIT Senior Notes	250		17			267		250		18			268
Total debt	$	3,050	$	13		$	3,063	$	2,986	$	17		$	3,003
Less: Unamortized debt expense (1)						16							10
Total long-term debt						$	3,047						$	2,993

____________________

(1) As of March 31, 2017 and December 31, 2016, there was an additional $4 million and $5 million, respectively, of unamortized debt expense related to the Revolving Credit Facility included in Other long-term assets, not included above.

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Revolving Credit Facility

On June 18, 2015, the Partnership amended and restated its Revolving Credit Facility that matures on June 18, 2020. As of March 31, 2017, there were no principal advances and $3 million in letters of credit outstanding under the $1.75 billion Revolving Credit Facility due June 18, 2020.

The Revolving Credit Facility provides that outstanding borrowings bear interest at 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 applicable credit ratings. As of March 31, 2017, 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 applicable credit rating from the rating agencies. As of March 31, 2017, the commitment fee under the 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.

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 was no amount outstanding under our commercial paper program at each of March 31, 2017 and December 31, 2016. On February 2, 2016, Standard & Poor’s Ratings Services lowered its credit rating on the Partnership from an investment grade rating to a non-investment grade rating. The short-term rating on the Partnership was also reduced from an investment grade rating to a non-investment grade rating. As a result of the downgrade, the Partnership repaid its outstanding borrowings under the commercial paper program upon maturity and did not issue any additional commercial paper.

Term Loan Agreement

On July 31, 2015, the Partnership entered into a Term Loan Agreement, providing for an unsecured three-year $450 million term loan agreement (2015 Term Loan Agreement). The entire $450 million principal amount of the 2015 Term Loan Agreement was borrowed by the Partnership on July 31, 2015. The 2015 Term Loan Agreement contains an option, which may be exercised up to two times, to extend the term of the 2015 Term Loan Agreement, in each case, for an additional one-year term. The 2015 Term Loan Agreement provides an option to prepay, without penalty or premium, the amount outstanding, or any portion thereof, in a minimum amount of $1 million, or any multiple of $0.5 million in excess thereof. As of March 31, 2017, there was $450 million outstanding under the 2015 Term Loan Agreement.

The 2015 Term Loan Agreement provides that outstanding borrowings bear interest at LIBOR and/or an alternate base rate, at the Partnership’s election, plus an applicable margin. The applicable margin is based on our applicable credit ratings. As ofMarch 31, 2017, the applicable margin for LIBOR-based borrowings under the 2015 Term Loan Agreement was 1.375% based on the Partnership’s credit ratings.As of March 31, 2017, the weighted average interest rate of the 2015 Term Loan Agreement was 2.15%.

The 2015 Term Loan Agreement contains substantially the same covenants as the Revolving Credit Facility.

Senior Notes

On March 9, 2017, the Partnership completed the public offering of $700 million 4.400% Senior Notes due 2027 (2027 Notes). The Partnership received net proceeds of approximately $691 million. The proceeds were used for general partnership purposes, including to repay amounts outstanding under the Revolving Credit Facility. The 2027 Notes had an unamortized discount of $3 million and unamortized debt expense of $6 million at March 31, 2017, resulting in an effective interest rate of 4.58% during the three months ended March 31, 2017.

In addition to the 2027 Notes, as of March 31, 2017, the Partnership’s debt included the 2019 Notes, 2024 Notes and 2044 Notes, which had $1 million of unamortized discount and $10 million of unamortized debt expense at March 31, 2017, resulting in effective interest rates of 2.58%, 4.02% and 5.08%, respectively, during the three months ended March 31, 2017.

As of March 31, 2017, the Partnership’s debt included EOIT’s $250 million6.25% senior notes due March 2020 (the EOIT Senior Notes). The EOIT Senior Notes had $17 million of unamortized premium at March 31, 2017, resulting in an effective interest rate of 3.86%, during the three months ended March 31, 2017. These senior notes do not contain any financial covenants other than a limitation on liens. This limitation on liens is subject to certain exceptions and qualifications.

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 As of March 31, 2017, the Partnership and EOIT were in compliance with all of their debt agreements, including financial covenants.

(8) Derivative Instruments and Hedging Activities

The Partnership is exposed to certain risks relating to its ongoing business operations. The primary risk managed using derivative instruments is commodity price risk. The Partnership is also exposed to credit risk in its business operations.

Commodity Price Risk

The Partnership has used forward physical contracts, commodity price swap contracts and commodity price option features to manage the Partnership’s commodity price risk exposures in the past. Commodity derivative instruments used by the Partnership are as follows:

• NGL put options, NGL futures and swaps, and WTI crude oil futures and swaps for condensate sales are used to manage the Partnership’s NGL and condensate exposure associated with its processing agreements;

• natural gas futures and swaps are used to manage the Partnership’s natural gas exposure associated with its gathering, processing and transportation and storage assets; and

• natural gas futures and swaps, natural gas options and natural gas commodity purchases and sales are used to manage the Partnership’s natural gas exposure associated with its storage and transportation contracts and asset management activities.

Normal purchases and normal sales contracts are not recorded in Other Assets or Liabilities in the Condensed Consolidated Balance Sheets and earnings are recognized and recorded in the period in which physical delivery of the commodity occurs. Management applies normal purchases and normal sales treatment to: (i) commodity contracts for the purchase and sale of natural gas used in or produced by the Partnership’s operations and (ii) commodity contracts for the purchase and sale of NGLs produced by the Partnership’s gathering and processing business.

The Partnership recognizes its non-exchange traded derivative instruments as Other Assets or Liabilities in the Condensed Consolidated Balance Sheets at fair value with such amounts classified as current or long-term based on their anticipated settlement. Exchange traded transactions are settled on a net basis daily through margin accounts with a clearing broker and, therefore, are recorded at fair value on a net basis in Other Current Assets in the Condensed Consolidated Balance Sheets.

As of March 31, 2017 and December 31, 2016, the Partnership had no derivative instruments that were designated as cash flow or fair value hedges for accounting purposes.

Credit Risk

The Partnership is exposed to certain credit risks relating to its ongoing business operations. Credit risk includes the risk that counterparties that owe the Partnership money or energy will breach their obligations. If the counterparties to these arrangements fail to perform, the Partnership may seek or be forced to enter into alternative arrangements. In that event, the Partnership’s financial results could be adversely affected, and the Partnership could incur losses.

Derivatives Not Designated As Hedging Instruments

Derivative instruments not designated as hedging instruments for accounting purposes are utilized in the Partnership’s asset management activities. 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

The majority of natural gas physical purchases and sales not designated as hedges for accounting purposes are priced based on a monthly or daily index, and the fair value is subject to little or no market price risk. Natural gas physical sales volumes exceed natural gas physical purchase volumes due to the marketing of natural gas volumes purchased via the Partnership’s processing contracts, which are not derivative instruments.

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As of March 31, 2017 and December 31, 2016, the Partnership had the following derivative instruments that were not designated as hedging instruments for accounting purposes:

	March 31, 2017		December 31, 2016
	Gross Notional Volume
	Purchases	Sales	Purchases	Sales
Natural gas—TBtu(1)
Financial fixed futures/swaps	5	24	2	29
Financial basis futures/swaps	5	25	2	30
Physical purchases/sales	1	45	1	25
Crude oil (for condensate)—MBbl(2)
Financial Futures/swaps	—	390	—	540
Natural gas liquids—MBbl(3)
Financial Futures/swaps	—	1,563	60	1,133

____________________

(1) As of March 31, 2017, 95.9% of the natural gas contracts had durations of one year or less and 4.1% had durations of more than one year and less than two years. As of December 31, 2016, 100.0% of the natural gas contracts had durations of one year or less.

(2) As of March 31, 2017 and December 31, 2016, 100% of the crude oil (for condensate) contracts had durations of one year or less.

(3) As of March 31, 2017, 51.1% of the natural gas liquids contracts had durations of one year or less and 48.9% had durations of more than one year and less than two years. As of December 31, 2016, 100% of the natural gas liquid contracts had durations of one year or less.

Balance Sheet Presentation Related to Derivative Instruments

The fair value of the derivative instruments that are presented in the Partnership’s Condensed Consolidated Balance Sheets as of March 31, 2017 and December 31, 2016 that were not designated as hedging instruments for accounting purposes are as follows:

		March 31, 2017				December 31, 2016
		Fair Value
Instrument	Balance Sheet Location	Assets		Liabilities		Assets		Liabilities
		(In millions)
Natural gas
Financial futures/swaps	Other Current/Other	$	2	$	8	$	2	$	22
Physical purchases/sales	Other Current/Other	1		—		—		1
Crude oil (for condensate)
Financial futures/swaps	Other Current/Other	1		1		—		3
Natural gas liquids
Financial Futures/swaps	Other Current/Other	—		3		—		8
Total gross derivatives (1)		$	4	$	12	$	2	$	34

_____________________

(1) See Note 9 for a reconciliation of the Partnership’s total derivatives fair value to the Partnership’s Condensed Consolidated Balance Sheets as of March 31, 2017 and December 31, 2016.

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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 for the three months ended March 31, 2017 and 2016:

	Amounts Recognized in Income
	Three Months Ended   March 31,
	2017		2016
	(In millions)
Natural gas
Financial futures/swaps gains (losses)	$	11	$	10
Physical purchases/sales gains (losses)	5		(4		)
Crude oil (for condensate)
Financial futures/swaps gains (losses)	3		1
Natural gas liquids
Financial futures/swaps gains (losses)	2		(4		)
Total	$	21	$	3

For derivatives not designated as hedges in the tables above, amounts recognized in income for the periods ended March 31, 2017 and 2016, 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 for the three months ended March 31, 2017 and 2016:

	Three Months Ended   March 31,
	2017			2016
	(In millions)
Change in fair value of derivatives	$	24		$	(8	)
Realized gain (loss) on derivatives	(3		)	11
Gain on derivative activity	$	21		$	3

Credit-Risk Related Contingent Features in Derivative Instruments

Based upon the Partnership’s senior unsecured debt rating with Moody’s Investors Services or Standard & Poor’s Ratings Services, the Partnership could be required to provide 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, 2017, under these obligations, $1 million of cash collateral has been posted. Based on positions as of March 31, 2017, approximately $1 million of additional collateral may be required to be posted by the Partnership.

(9) 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. Hierarchical levels, as defined below and directly related to the amount of subjectivity associated with the inputs to fair valuations of these assets and liabilities are as follows:

Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date. Instruments classified as Level 1 include natural gas futures, swaps and options transactions for contracts traded on the NYMEX and settled through a NYMEX clearing broker.

Level 2: Inputs, other than quoted prices included in Level 1, are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices for similar instruments in active markets, and inputs other than quoted prices

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that are observable for the asset or liability. Fair value assets and liabilities that are generally included in this category are derivatives with fair values based on inputs from actively quoted markets. Instruments classified as Level 2 include over-the-counter NYMEX natural gas swaps, natural gas basis swaps and natural gas purchase and sales transactions in markets such that the pricing is closely related to the NYMEX pricing, and over-the-counter WTI crude oil swaps for condensate sales.

Level 3: Inputs are unobservable for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. Unobservable inputs reflect the Partnership’s judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. The Partnership develops these inputs based on the best information available, including the Partnership’s own data.

The Partnership utilizes the market approach in determining the fair value of its derivative positions by using either NYMEX or WTI published market prices, independent broker pricing data or broker/dealer valuations. The valuations of derivatives with pricing based on NYMEX published market prices may be considered Level 1 if they are settled through a NYMEX clearing broker account with daily margining. Over-the-counter derivatives with NYMEX or WTI based prices are considered Level 2 due to the impact of counterparty credit risk. Valuations based on independent broker pricing or broker/dealer valuations may be classified as Level 2 only to the extent they may be validated by an additional source of independent market data for an identical or closely related active market. In certain less liquid markets or for longer-term contracts, forward prices are not as readily available. In these circumstances, contracts are valued using internally developed methodologies that consider historical relationships among various quoted prices in active markets that result in management’s best estimate of fair value. These contracts are classified as Level 3.

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 period ended March 31, 2017, there were no transfers between levels.

The impact to the fair value of derivatives due to credit risk is calculated using the probability of default based on Standard & Poor’s Ratings Services and/or internally generated ratings. The fair value of derivative assets is adjusted for credit risk. The fair value of derivative liabilities is adjusted for credit risk only if the impact is deemed material.

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 as of March 31, 2017 and December 31, 2016.

	March 31, 2017				December 31, 2016
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(In millions)
Long-Term Debt
Revolving Credit Facility (Level 2)	$	—	$	—	$	636	$	636
2015 Term Loan Agreement (Level 2)	450		450		450		450
2019 Notes (Level 2)	500		495		500		490
2024 Notes (Level 2)	599		584		599		564
2027 Notes (Level 2)	697		695		—		—
2044 Notes (Level 2)	550		503		550		467
EOIT Senior Notes (Level 2)	267		268		268		260

The fair value of the Partnership’s Revolving Credit Facility, 2015 Term Loan Agreement, EOIT Senior Notes, 2019 Notes, 2024 Notes, 2027 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

20

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, 2017, no material fair value adjustments or fair value measurements were required for these non-financial assets or liabilities.

Contracts with Master Netting Arrangements

Fair value amounts recognized for forward, interest rate swap, option and other conditional or exchange contracts executed with the same counterparty under a master netting arrangement may be offset. The reporting entity’s choice to offset or not must be applied consistently. A master netting arrangement exists if the reporting entity has multiple contracts, whether for the same type of conditional or exchange contract or for different types of contracts, with a single counterparty that are subject to a contractual agreement that provides for the net settlement of all contracts through a single payment in a single currency in the event of default on or termination of any one contract. Offsetting the fair values recognized for forward, interest rate swap, option and other conditional or exchange contracts outstanding with a single counterparty results in the net fair value of the transactions being reported as an asset or a liability in the Condensed Consolidated Balance Sheets. The Partnership has presented the fair values of its derivative contracts under master netting agreements using a net fair value presentation.

The following tables summarize the Partnership’s assets and liabilities that are measured at fair value on a recurring basis as of March 31, 2017 and December 31, 2016:

March 31, 2017	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	$	7	$	—	$	—
Significant other observable inputs (Level 2)	2		2		23		9
Unobservable inputs (Level 3)	—		3		—		—
Total fair value	4		12		23		9
Netting adjustments	—		—		—		—
Total	$	4	$	12	$	23	$	9

December 31, 2016	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	$	22	$	—	$	—
Significant other observable inputs (Level 2)	—		4		41		30
Unobservable inputs (Level 3)	—		8		—		—
Total fair value	2		34		41		30
Netting adjustments	—		—		—		—
Total	$	2	$	34	$	41	$	30

______________________

(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. Gas imbalances held by EOIT are valued using an average of the Inside FERC Gas Market Report for Panhandle Eastern Pipe Line Co. (Texas, Oklahoma Mainline), ONEOK (Oklahoma) and ANR Pipeline (Oklahoma) indices. There were no netting adjustments as of March 31, 2017 and December 31, 2016.

(2) Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $1 million and zero at March 31, 2017 and December 31, 2016, 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 $9 million and $5 million at March 31, 2017 and December 31, 2016, 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.

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Changes in Level 3 Fair Value Measurements

The following table provides a reconciliation of changes in the fair value of our Level 3 commodity contracts between the periods presented.

	Commodity Contracts
	Natural gas liquids  financial futures/swaps
	(In millions)
Balance as of December 31, 2016	$	(8	)
Gains included in earnings	2
Settlements	3
Balance as of March 31, 2017	$	(3	)

Quantitative Information on Level 3 Fair Value Measurements

The Partnership utilizes the market approach to measure the fair value of our commodity contracts. The significant unobservable inputs used in this approach to fair value are longer dated price quotes. Our sensitivity to these longer dated forward curve prices are presented in the table below. Significant changes in any of those inputs in isolation would result in significantly different fair value measurements, depending on our short or long position in contracts.

	March 31, 2017
Product Group	Fair Value			Forward Curve Range
	(In millions)			(Per gallon)
Natural gas liquids	$	(3	)	$0.285 - $0.855

(10)Supplemental Disclosure of Cash Flow Information

The following table provides information regarding supplemental cash flow information:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Supplemental Disclosure of Cash Flow Information:
Cash Payments:
Interest, net of capitalized interest	$	14	$	15
Income taxes, net of refunds	—		1
Non-cash transactions:
Accounts payable related to capital expenditures	20		42

The following table reconciles cash and cash equivalents and restricted cash on the Condensed Consolidated Balance Sheets to cash, cash equivalents and restricted cash on the Condensed Consolidated Statement of Cash Flows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Cash and cash equivalents	$	17	$	38
Restricted cash	14		—
Cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statements of Cash Flows	$	31	$	38

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(11) Related Party Transactions

The material related party transactions with CenterPoint Energy, OGE Energy and their respective subsidiaries are summarized below. There were no material related party transactions with other affiliates.

Transportation and Storage Agreements

Transportation and Storage Agreements with CenterPoint Energy

EGT provides the following services to CenterPoint Energy’s LDCs in Arkansas, Louisiana, Oklahoma and Northeast Texas: (1) firm transportation with seasonal contract demand, (2) firm storage, (3) no notice transportation with associated storage and (4) maximum rate firm transportation. The first three services are in effect through March 31, 2021, and will remain in effect from year to year thereafter unless either party provides 180 days’ written notice prior to the contract termination date. The maximum rate firm transportation is in effect through March 31, 2018. MRT provides firm transportation and firm storage services to CenterPoint Energy’s LDCs under agreements that are in effect through May 15, 2018, but will continue year to year thereafter unless either party provides twelve months’ written notice prior to the contract termination date.

Transportation and Storage Agreement with OGE Energy

EOIT provides no-notice load-following transportation and storage services to OGE Energy. On March 17, 2014, EOIT entered into a transportation agreement with OGE Energy, with a primary term of May 1, 2014 through April 30, 2019. Following the primary term, the agreement will remain in effect from year to year thereafter unless either party provides notice of termination to the other party at least 180 days prior to the commencement of the succeeding annual period.

On December 6, 2016, EOIT entered into a transportation agreement with OGE Energy, with a primary term expected to begin in late 2018 and extend for 20 years. In connection with the agreement, an approximately 80 mile pipeline will be built to serve OGE Energy’s Muskogee Power Plant.

Gas Sales and Purchases Transactions

The Partnership sells natural gas volumes to affiliates of CenterPoint Energy and OGE Energy or purchases natural gas volumes from affiliates of CenterPoint Energy through a combination of forward, monthly and daily transactions. The Partnership enters into these physical natural gas transactions in the normal course of business based upon relevant market prices.

The Partnership’s revenues from affiliated companies accounted for 6% and 9% of total revenues during the three months ended March 31, 2017 and 2016, respectively. Amounts of revenues from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income are summarized as follows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Gas transportation and storage service revenue — CenterPoint Energy	$	33	$	33
Natural gas product sales — CenterPoint Energy	—		1
Gas transportation and storage service revenue — OGE Energy	9		9
Natural gas product sales — OGE Energy	—		1
Total revenues — affiliated companies	$	42	$	44

Amounts of natural gas purchased from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income are summarized as follows:

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	Three Months Ended   March 31,
	2017		2016
	(In millions)
Cost of natural gas purchases — CenterPoint Energy	$	—	$	—
Cost of natural gas purchases — OGE Energy	3		2
Total cost of natural gas purchases — affiliated companies	$	3	$	2

Corporate services and seconded employee expense

As of March 31, 2017, 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 employee costs arising out of OGE Energy’s defined benefit and retiree medical plans is fixed at $5 million in 2017 and at actual cost subject to a cap of $5 million in 2018 and thereafter, in the event of continued secondment.

Under the terms of the MFA, the Partnership receives services and support functions from each of CenterPoint Energy and OGE Energy under service agreements for an initial term that ended on April 30, 2016. The service 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 these service 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 2017 are $3 million and $4 million, respectively.

On November 1, 2016, the Partnership entered into a new lease with an affiliate of CenterPoint Energy pursuant to which the Partnership leases office space in Shreveport, Louisiana. The term of the lease was effective on October 1, 2016 and extends through December 31, 2019. The Partnership expects to incur approximately $3 million in rent and maintenance expenses through the end of the initial term of the lease. Prior to October 1, 2016, CenterPoint Energy provided the office space in Shreveport, Louisiana, under the services agreement. As of March 31, 2017, CenterPoint Energy continues to provide office and data center space to the Partnership in Houston, Texas, under the services agreement.

Amounts charged to the Partnership by affiliates for seconded employees and corporate services, included primarily in Operation and maintenance and General and administrative expenses in the Partnership’s Condensed Consolidated Statements of Income are as follows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Corporate Services — CenterPoint Energy	$	1	$	2
Seconded Employee Costs — OGE Energy	7		9
Corporate Services — OGE Energy	1		2
Total corporate services and seconded employees expense	$	9	$	13

Series A Preferred Units

On February 18, 2016, the Partnership completed the private placement, with CenterPoint Energy, of 14,520,000 Series A Preferred Units representing limited partner interests in the Partnership for a cash purchase price of $25.00 per Series A Preferred Unit, resulting in proceeds of $362 million, net of issuance costs. See Note 4 for further discussion of the Series A Preferred Units.

Notes payable

On February 18, 2016, in connection with the private placement of the Series A Preferred Units, the Partnership redeemed $363 million of notes payable—affiliated companies payable to a subsidiary of CenterPoint Energy.

The Partnership recorded affiliated interest expense to CenterPoint Energy on notes payable—affiliated companies of zero and $1 million during the three months ended March 31, 2017 and 2016, respectively.

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(12) 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.

(13) Equity Based Compensation

The following table summarizes the Partnership’s compensation expense for the three months ended March 31, 2017 and 2016 related to performance units, restricted units, and phantom units for the Partnership’s employees and independent directors:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Performance units	$	3	$	1
Restricted units	—		1
Phantom units	1		—
Total compensation expense	$	4	$	2

Units Outstanding

The Partnership periodically grants performance units, restricted units, and phantom units to certain employees under the Enable Midstream Partners, LP Long Term Incentive Plan. A summary of the activity for the Partnership’s performance units, restricted units, and phantom units applicable to the Partnership’s employees at March 31, 2017 and changes during 2017 are shown in the following table.

	Performance Units					Restricted Units					Phantom Units
	Number of Units (1)			Weighted Average Grant-Date Fair Value, Per Unit		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, 2016	1,969,107			$	15.27	392,995			$	20.74	643,604			$	8.49
Granted	468,626			19.27		—			—		376,385			16.26
Vested	—			—		—			—		—			—
Forfeited	(18,217		)	15.20		(3,194		)	21.54		(3,580		)	8.12
Units Outstanding at March 31, 2017	2,419,516			$	16.05	389,801			$	20.74	1,016,409			$	11.37
Aggregate Intrinsic Value of Units Outstanding at March 31, 2017	$	40				$	7				$	17

_____________________

(1) Performance units outstanding as of March 31, 2017 include 336,322 units from the annual grant, which were approved by the Board of Directors in 2014. The results of the performance units were certified by the Compensation Committee in February 2017, at a 91.5% payout based on the level of achievement of a performance goal established by the Board of Directors over a performance period of April 11, 2014 through December 31, 2016. Additional information related to the performance goal is described in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2014. The reduction in outstanding units for a payout percentage of an amount other than 100% is not reflected above until the vesting date.

25

Unrecognized Compensation Cost

A summary of the Partnership’s unrecognized compensation cost for its non-vested performance units, restricted units, and phantom units, and the weighted-average periods over which the compensation cost is expected to be recognized are shown in the following table.

	March 31, 2017
	Unrecognized Compensation Cost (In millions)		Weighted Average to be Recognized (In years)
Performance Units	$	21	1.78
Restricted Units	2		0.79
Phantom Units	9		2.30
Total	$	32

As of March 31, 2017, there were 8,487,330 units available for issuance under the long term incentive plan.

(14) 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 2016 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, which primarily provides natural gas and crude oil gathering and natural gas processing services to our producer customers, and (ii) transportation and storage, which provides interstate and intrastate natural gas pipeline transportation and storage service primarily to our producer, power plant, LDC and industrial end-user customers.

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Financial data for reportable segments are as follows:

Three Months Ended March 31, 2017	Gathering  and Processing		Transportation and Storage(1)		Eliminations			Total
	(In millions)
Product sales	$	351	$	153	$	(118	)	$	386
Service revenue	140		141		(1		)	280
Total Revenues	491		294		(119		)	666
Cost of natural gas and natural gas liquids	286		140		(118		)	308
Operation and maintenance, General and administrative	70		45		(1		)	114
Depreciation and amortization	56		32		—			88
Taxes other than income tax	9		7		—			16
Operating income	$	70	$	70	$	—		$	140
Total assets	$	7,460	$	4,966	$	(1,265	)	$	11,161
Capital expenditures	$	51	$	10	$	—		$	61
Three Months Ended March 31, 2016	Gathering and Processing		Transportation and Storage(1)		Eliminations			Total
	(In millions)
Product sales	$	208	$	106	$	(69	)	$	245
Service revenue	125		140		(1		)	264
Total Revenues	333		246		(70		)	509
Cost of natural gas and natural gas liquids	165		99		(69		)	195
Operation and maintenance, General and administrative	75		41		(1		)	115
Depreciation and amortization	49		32		—			81
Taxes other than income tax	8		7		—			15
Operating income	$	36	$	67	$	—		$	103
Total assets as of December 31, 2016	$	7,453	$	4,963	$	(1,204	)	$	11,212
Capital expenditures	$	121	$	9	$	—		$	130

_____________________

(1) See Note 6 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, 2017 and 2016.

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, 2016, 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. 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.

27

Overview

Enable Midstream Partners, LP is a Delaware limited partnership formed in May 2013 by CenterPoint Energy, OGE Energy and ArcLight to own, operate and develop midstream energy infrastructure assets strategically located to serve our customers. We completed our IPO in April 2014, and 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. 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 North Dakota and serve crude oil production in the Bakken Shale formation of the Williston Basin. 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, a pipeline extending from Louisiana to Alabama.

We expect our business to continue to be affected by the key trends included in our Annual Report. 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 and growing through accretive acquisitions and disciplined development. As part of these efforts, we continuously engage in discussions with new and existing customers regarding the development of 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.

Typically, we do not announce a transaction until after we have executed a definitive agreement. However, in certain cases in order to protect our business interests or for other reasons, we may defer public announcement of a transaction until closing or a later date. Past experience has demonstrated that the pace of discussions and negotiations regarding potential transactions is unpredictable and can advance or terminate in a short period of time.

Recent Developments

Issuance of Senior Notes

On March 9, 2017, the Partnership completed the public offering of $700 million 4.400% Senior Notes due 2027 (2027 Notes). The Partnership received net proceeds of approximately $691 million. The proceeds were used for general partnership purposes, including to repay amounts outstanding under the Revolving Credit Facility.

Commercial and Construction Update

Project Wildcat rich gas takeaway solution

The Partnership has entered into an agreement to deliver approximately 400 MMcf/d of rich natural gas from the Anadarko Basin to north Texas, providing a new market outlet for growing Anadarko Basin production. Project Wildcat is expected to provide access to the Texas intrastate natural gas markets, including the Tolar Hub, by contracting with an affiliate of Energy Transfer Partners, LP for 400 MMcf/d of firm processing capacity at the Godley Plant in Johnson County, Texas. The project is expected to be in service by the end of the second quarter of 2018. Even with the 400 MMcf/d of processing capacity provided by this project, the Partnership anticipates that there will be a need to resume construction of the previously announced Wildhorse Plant, though likely not before 2018.

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EGT Expansion Project

In March 2017, EGT conducted a non-binding open season to solicit commitments for the Cana and STACK Expansion (CaSE) project, a system expansion providing firm transportation service for growing Anadarko Basin production. The project’s foundation shipper, Newfield Exploration Company, has entered into a 205,000 Dth/d firm natural gas transportation agreement with EGT. The 10-year contract is expected to start at an initial capacity of 45,000 Dth/d in early 2018 and grow to the full contracted capacity by the fourth quarter of 2018.

CenterPoint Strategic Review

In July 2016, CenterPoint Energy and its wholly owned subsidiary, CenterPoint Energy Resources Corp. (CERC), provided a notice under Enable’s Fourth Amended and Restated Agreement of Limited Partnership and Enable GP’s Third Amended and Restated Limited Liability Company Agreement (the First Notice) to OGE Energy of CenterPoint Energy’s intention to solicit offers from unrelated third parties to acquire all or a portion of the common units and subordinated units of Enable owned by CERC and all of the membership interests of Enable GP owned by CERC. In January 2017, CenterPoint Energy and CERC provided a second notice (the Second Notice) to OGE Energy of CenterPoint Energy’s solicitation of offers from unrelated third parties to acquire all or any portion of the common units and subordinated units of Enable owned by CERC and all of the membership interests of the general partner of Enable owned by CERC.

In August 2016, in response to the First Notice, and again in February 2017, in response to the Second Notice, respectively, OGE Energy submitted to CenterPoint Energy proposals (the Proposals) to acquire, in conjunction with a third party, all of CERC’s membership interests in Enable GP and all of the common units and subordinated units of Enable owned by CERC. In February 2017, CenterPoint Energy stated that it continues to evaluate strategic alternatives for its investment in us, including evaluating OGE Energy’s Proposals, evaluating a spin-off, continuing discussions with third parties regarding other sales or dispositions of CenterPoint Energy’s interests and, if none of these options achieve its strategic objectives, maintaining its investment in us.

Results of Operations

The following tables summarize the key components of our results of operations for the three months ended March 31, 2017 and 2016.

Three Months Ended March 31, 2017	Gathering and Processing		Transportation and Storage		Eliminations			Enable Midstream Partners, LP
	(In millions)
Product sales	$	351	$	153	$	(118	)	$	386
Service revenue	140		141		(1		)	280
Total Revenues	491		294		(119		)	666
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	286		140		(118		)	308
Gross margin (1)	205		154		(1		)	358
Operation and maintenance, General and administrative	70		45		(1		)	114
Depreciation and amortization	56		32		—			88
Taxes other than income tax	9		7		—			16
Operating income	$	70	$	70	$	—		$	140
Equity in earnings of equity method affiliate	$	—	$	7	$	—		$	7

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Three Months Ended March 31, 2016	Gathering and Processing		Transportation and Storage		Eliminations			Enable Midstream Partners, LP
	(In millions)
Product sales	$	208	$	106	$	(69	)	$	245
Service revenue	125		140		(1		)	264
Total Revenues	333		246		(70		)	509
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	165		99		(69		)	195
Gross margin (1)	168		147		(1		)	314
Operation and maintenance, General and administrative	75		41		(1		)	115
Depreciation and amortization	49		32		—			81
Taxes other than income tax	8		7		—			15
Operating income	$	36	$	67	$	—		$	103
Equity in earnings of equity method affiliate	$	—	$	7	$	—		$	7

_____________________

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

	Three Months Ended   March 31,
	2017	2016
Operating Data:
Gathered volumes—TBtu	296	278
Gathered volumes—TBtu/d	3.29	3.05
Natural gas processed volumes—TBtu	168	162
Natural gas processed volumes—TBtu/d	1.87	1.78
NGLs produced—MBbl/d(1)	79.76	73.47
NGLs sold—MBbl/d(1)(2)	78.65	76.31
Condensate sold—MBbl/d	5.47	6.45
Crude Oil—Gathered volumes—MBbl/d	21.18	28.85
Transported volumes—TBtu	493	465
Transported volumes—TBtu/d	5.48	5.11
Interstate firm contracted capacity—Bcf/d	7.23	7.17
Intrastate average deliveries—TBtu/d	1.84	1.68

 _____________________

(1) Excludes condensate.

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

30

	Three Months Ended   March 31,
	2017	2016
Anadarko
Gathered volumes—TBtu/d	1.75	1.61
Natural gas processed volumes—TBtu/d	1.54	1.41
NGLs produced—MBbl/d(1)	67.30	58.58
Arkoma
Gathered volumes—TBtu/d	0.57	0.62
Natural gas processed volumes—TBtu/d	0.10	0.10
NGLs produced—MBbl/d(1)	4.85	4.94
Ark-La-Tex
Gathered volumes—TBtu/d	0.97	0.82
Natural gas processed volumes—TBtu/d	0.23	0.27
NGLs produced—MBbl/d(1)	7.61	9.95

 _____________________

(1) Excludes condensate.

Gathering and Processing

Three months ended March 31, 2017 compared to three months ended March 31, 2016. Our gathering and processing segment reported operating income of $70 million in the three months ended March 31, 2017 compared to operating income of $36 million in the three months ended March 31, 2016. The difference of $34 million in operating income between periods was primarily due to a $37 millionincrease in gross margin and a $5 milliondecrease in operation and maintenance and general and administrative expenses. This was partially offset by a $7 millionincrease in depreciation and amortization and a $1 millionincrease in taxes other than income tax during the three months ended March 31, 2017.

Our gathering and processing segment revenues increased $158 million. The increase was primarily due to a $93 million increase in revenues from NGL sales resulting from higher average NGL prices, a $43 million increase in revenues from sales of natural gas as a result of higher average natural gas prices, a $16 million increase in revenue from changes to the fair value of condensate and NGL derivatives and a $6 million increase in natural gas gathering revenues due to higher fees and gathered volumes in the Anadarko and Ark-La-Tex Basins.

Our gathering and processing segment gross margin increased $37 million. The increase was primarily due to a $16 million increase in gathering margin due to increased gathered volumes in the Anadarko and Ark-La-Tex Basins, a $16 million increase in gross margin from changes in the fair value of condensate and NGL derivatives, an $11 million increase in processing margins resulting from higher average NGL prices and higher processed volumes in the Anadarko Basin offset by lower processed volumes in the Ark-La-Tex Basin, a $2 million increase in natural gas sales due to higher average natural gas prices and a $1 million increase due to increased water transportation services in the Williston Basin. These increases were partially offset by a $9 million decrease in the imbalance receivable associated with our annual fuel rate determination in 2016.

Our gathering and processing segment operation and maintenance and general and administrative expenses decreased $5 million. The decrease was primarily due to a $2 million decrease in allowance for doubtful accounts, a $2 million decrease in various other operating costs, a $1 million reduction in equipment rentals and a $1 million reduction in information technology- related costs. These decreases were partially offset by $1 million in increased payroll-related costs.

Our gathering and processing segment depreciation and amortization increased $7 million due to additional assets placed in-service.

Our gathering and processing segment taxes other than income tax increased $1 million due to higher accrued ad valorem taxes due to additional assets placed in-service.

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Transportation and Storage

Three months ended March 31, 2017 compared to three months ended March 31, 2016. Our transportation and storage segment reported operating income of $70 million in the three months ended March 31, 2017 compared to operating income of $67 million in the three months ended March 31, 2016. The difference of $3 million in operating income between periods was primarily due to a $7 millionincrease in gross margin offset by a $4 millionincrease in operation and maintenance and general and administrative expenses for the three months ended March 31, 2017.

Our transportation and storage segment revenues increased $48 million. The increase was primarily due to a $28 million increase in revenues from higher natural gas sales associated with higher sales volumes and higher average sales prices and a $16 million increase in revenues from changes in the fair value of natural gas derivatives.

Our transportation and storage segment gross margin increased $7 million. The increase was primarily due to a $16 million increase in gross margin from changes in the fair value of natural gas derivatives, an increase of $3 million in firm transportation margins, a $2 million increase in off-system transportation margins and a $2 million increase in NGL sales due to an increase in prices. These increases were partially offset by a $15 million decrease in system management activities and a $1 million decrease in margins on transportation services for LDCs.

Our transportation and storage segment operation and maintenance and general and administrative expenses increased $4 million. The increase was primarily due to a $3 million increase in payroll-related costs and a $1 million increase in various other operating costs.

Condensed Consolidated Interim Information

	Three Months Ended   March 31,
	2017			2016
	(In millions)
Operating Income	$	140		$	103
Other Income (Expense):
Interest expense	(27		)	(23		)
Equity in earnings of equity method affiliate	7			7
Other, net	1			—
Total Other Expense	(19		)	(16		)
Income Before Income Taxes	121			87
Income tax expense	1			1
Net Income	$	120		$	86
Less: Net income attributable to noncontrolling interest	—			—
Net Income Attributable to Limited Partners	$	120		$	86
Less: Series A Preferred Unit distributions	9			—
Net Income Attributable to Common and Subordinated Units	$	111		$	86

Three Months Ended March 31, 2017 compared to Three Months Ended March 31, 2016

Net Income attributable to limited partners. We reported net income attributable to limited partners of $120 million in the three months ended March 31, 2017 compared to net income attributable to limited partners of $86 million in the three months ended March 31, 2016. The increase in net income attributable to limited partners of $34 million was primarily attributable to an increase in operating income of $37 million and an increase in other income of $1 million, partially offset by an increase in interest expense of $4 million in the three months ended March 31, 2017.

Interest Expense. Interest expense increased $4 million primarily due to higher interest rates on the Partnership’s outstanding debt.

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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.

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Reconciliation of Gross margin to Total Revenues:
Consolidated
Product sales	$	386	$	245
Service revenue	280		264
Total Revenues	666		509
Cost of natural gas and natural gas liquids (excluding depreciation and amortization)	308		195
Gross margin	$	358	$	314
Reportable Segments
Gathering and Processing
Product sales	$	351	$	208
Service revenue	140		125
Total Revenues	491		333
Cost of natural gas and natural gas liquids (excluding depreciation and amortization)	286		165
Gross margin	$	205	$	168
Transportation and Storage
Product sales	$	153	$	106
Service revenue	141		140
Total Revenues	294		246
Cost of natural gas and natural gas liquids (excluding depreciation and amortization)	140		99
Gross margin	$	154	$	147

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The following table shows the components of our gross margin for the three months ended March 31, 2017:

	Fee-Based
	Demand/ Commitment/ Guaranteed Return		Volume Dependent		Commodity- Based		Total
Three Months Ended March 31, 2017
Gathering and Processing Segment	26	%	43	%	31	%	100	%
Transportation and Storage Segment	84	%	4	%	12	%	100	%
Partnership Weighted Average	50	%	27	%	23	%	100	%

	Three Months Ended   March 31,
	2017			2016
	(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	$	120		$	86
Depreciation and amortization expense	88			81
Interest expense, net of interest income	27			23
Income tax expense	1			1
Distributions received from equity method affiliate in excess of equity earnings	4			13
Non-cash equity based compensation	4			2
Change in fair value of derivatives	(24		)	8
Other non-cash losses(1)	1			1
Adjusted EBITDA	$	221		$	215
Series A Preferred Unit distributions(2)	(9		)	(4		)
Adjusted interest expense(3)	(27		)	(23		)
Maintenance capital expenditures	(14		)	(13		)
Current income taxes	—			(1		)
DCF	$	171		$	174
Distributions related to common and subordinated unitholders(4)	$	137		$	134
Distribution coverage ratio	1.25			1.30

____________________

(1) Other non-cash losses includes loss on sale of assets and write-downs of materials and supplies.

(2) This amount represents the quarterly cash distributions on the Series A Preferred Units declared for the three months ended March 31, 2017 and 2016. The March 31, 2016 amount represents the prorated quarterly cash distribution on the Series A Preferred Units declared on April 26, 2016. 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.

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

(4) Represents cash distributions declared for common and subordinated units outstanding as of each respective period.  Amounts for 2017 reflect estimated cash distributions for common and subordinated units outstanding for the quarter ended March 31, 2017.

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	Three Months Ended   March 31,
	2017			2016
	(In millions)
Reconciliation of Adjusted EBITDA to net cash provided by operating activities:
Net cash provided by operating activities	$	156		$	117
Interest expense, net of interest income	27			23
Income tax expense	1			1
Deferred income tax (expense) benefit	(1		)	—
Changes in operating working capital which (provided) used cash:
Accounts receivable	(10		)	(24		)
Accounts payable	55			87
Other, including changes in noncurrent assets and liabilities	12			(11		)
Return of investment in equity method affiliate	4			13
Change in fair value of derivatives	(24		)	8
Other non-cash losses(1)	1			1
Adjusted EBITDA	$	221		$	215

____________________

(1) Other non-cash losses includes loss on sale of assets and write-downs of materials and supplies.

	Three Months Ended   March 31,
	2017			2016
	(In millions)
Reconciliation of Adjusted interest expense to Interest expense:
Interest Expense	$	27		$	23
Amortization of premium on long-term debt	1			1
Amortization of debt expense and discount	(1		)	(1		)
Adjusted interest expense	$	27		$	23

Liquidity and Capital Resources

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, and the level and timing of spending for maintenance and expansion activity. As of March 31, 2017, we had a working capital surplus of $96 million. We utilize our revolving credit facility to manage the timing of cash flows and fund short-term working capital deficits.

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Cash Flows

The following tables reflect cash flows for the applicable periods:

	Three Months Ended   March 31,
	2017			2016
	(In millions)
Net cash provided by operating activities	$	156		$	117
Net cash used in investing activities	$	(56	)	$	(117	)
Net cash provided by (used in) financing activities	$	(92	)	$	34

Operating Activities

The increase of $39 million, or 33%, in net cash provided by operating activities for the three months ended March 31, 2017 as compared to the three months ended March 31, 2016 was primarily due to an increase in net income of $34 million and a $10 million increase in other non-cash items, partially offset by a $5 million decrease in timing of cash receipts and disbursements and changes in other working capital assets and liabilities.

Investing Activities

The decrease of $61 million, or 52%, in net cash used in investing activities for the three months ended March 31, 2017 as compared to the three months ended March 31, 2016 was primarily due to lower capital expenditures of $69 million as well as a decrease in return of investment in equity method affiliate of $9 million.

Financing Activities

Net cash provided by (used in) financing activities decreased $126 million for the three months ended March 31, 2017 as compared to the three months ended March 31, 2016. Our primary financing activities consist of the following:

	Three Months Ended   March 31,
	2017			2016
	(In millions)
Proceeds from 2027 Notes, net of issuance costs	$	691		$	—
Net (repayments) proceeds from Revolving Credit Facility	(636		)	405
Repayments from commercial paper program	—			(236		)
Repayment of notes payable—affiliated companies	—			(363		)
Proceeds from issuance of Series A Preferred Units, net of issuance costs	—			362
Distributions	(147		)	(134		)

Please see Note 7, “Debt” in the Notes to the Unaudited Condensed Consolidated Financial Statements in Part 1, Item 1. for a description of the Partnership’s debt agreements.

Sources of Liquidity

As of March 31, 2017, our sources of liquidity included:

• cash on hand;

• cash generated from operations;

• borrowings under our Revolving Credit Facility; and

• capital raised through debt and equity markets.

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Distribution Reinvestment Plan

In June 2016, the Partnership implemented a Distribution Reinvestment Plan (DRIP), which, beginning with the quarterly distribution for the quarter ended September 30, 2016, offers owners of our common and subordinated units the ability to purchase additional common units by reinvesting all or a portion of the cash distributions paid to them on their common or subordinated units. The Partnership will have the sole discretion to determine whether common units purchased under the DRIP will come from our newly issued common units or from common units purchased on the open market. The purchase price for newly issued common units will be the average of the high and low trading prices of the common units on the New York Stock Exchange-Composite Transactions for the five trading days immediately preceding the investment date. The purchase price for common units purchased on the open market will be the weighted average price of all common units purchased for the DRIP for the respective investment date. We can set a discount ranging from 0% to 5% for common units purchased pursuant to the DRIP. The discount is currently set at 0%. Participation in the DRIP is voluntary, and once enrolled, our unitholders may terminate participation at any time.

Capital Requirements

The midstream business is capital intensive and can require significant investment to maintain and upgrade existing operations, connect new wells to the system, organically grow into new areas and comply with environmental and safety regulations. Going forward, our capital requirements will consist of the following:

• maintenance capital expenditures, which are cash expenditures (including expenditures for the construction or development of new capital assets or the replacement, improvement or expansion of existing capital assets) made to maintain, over the long-term, our operating capacity or operating income; and

• expansion capital expenditures, which are cash expenditures incurred for acquisitions or capital improvements that we expect will increase our operating income or operating capacity over the long term.

Our future expansion capital expenditures may vary significantly from period to period based on commodity prices and the investment opportunities available to us. We expect to fund future capital expenditures from cash flow generated from our operations, borrowings under our Revolving Credit Facility, new debt offerings or the issuance of additional partnership units. Issuances of equity or debt in the capital markets may not, however, be available to us on acceptable terms.

Distributions

On May 2, 2017, the board of directors of Enable GP declared a quarterly cash distribution of $0.318 per common unit on all of the Partnership’s outstanding common and subordinated units for the period ended March 31, 2017. The distributions will be paid May 30, 2017 to unitholders of record as of the close of business on May 23, 2017. Additionally, the board of directors of Enable GP declared a quarterly cash distribution of $0.625 on the Partnership’s outstanding Series A Preferred Units. The distributions will be paid May 12, 2017 to unitholders of record as of the close of business on May 2, 2017.

Off-Balance Sheet Arrangements

We do not have any off-balance sheet arrangements.

Credit Risk

We are exposed to certain credit risks relating to our ongoing business operations. Credit risk includes the risk that counterparties that owe us money or energy will breach their obligations. If the counterparties to these arrangements fail to perform, we may be forced to enter into alternative arrangements. In that event, our financial results could be adversely affected, and we could incur losses. We examine the creditworthiness of third party customers to whom we extend credit and manage our exposure to credit risk through credit analysis, credit approval, credit limits and monitoring procedures, and for certain transactions, we may request letters of credit, prepayments or guarantees.

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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 the Consolidated Financial Statements in Item 8. “Financial Statements and Supplementary Data” in our Annual Report on Form 10-K for the year ended December 31, 2016. The accounting policies and estimates used in preparing our interim Condensed Consolidated Financial Statements for the three months ended March 31, 2017 are the same as those described in our Annual Report on Form 10-K for the year ended December 31, 2016.

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, condensate and NGLs. The Partnership utilizes derivatives and forward commodity sales to mitigate the effects of price changes. We do not enter into risk management contracts for speculative purposes. For further information regarding our derivatives, see Note 8.

Based on our forecasted volumes, prices and contractual arrangements, we estimate approximately 15% of our total gross margin for the twelve months ending December 31, 2017 is directly exposed to changes in commodity prices, excluding the impact of hedges and contractual floors related to commodity prices in certain agreements.

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, a 10% decrease in prices from forecasted levels would decrease net income by approximately $7 million for natural gas and ethane and $8 million for NGLs, excluding ethane, and condensate, excluding the impact of hedges, for the remaining nine months ending December 31, 2017.

Interest Rate Risk

Our current interest rate risk exposure is related primarily to our debt portfolio. Our debt portfolio is substantially comprised of fixed rate debt, 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 Revolving Credit Facility, 2015 Term Loan Agreement and any issuances under our commercial paper program are at a variable interest rate and expose us to the risk of increasing interest rates. Based upon the $450 million outstanding borrowings under the 2015 Term Loan Agreement as of March 31, 2017, and holding all other variables constant, a 100 basis-point, or 1%, increase in interest rates would increase our annual interest expense by approximately $5 million.

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 Securities Exchange Act of 1934, as amended (the “Exchange Act”)) as of March 31, 2017. Based on such evaluation, our management has concluded that, as of March 31, 2017, 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 possible controls and

38

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 Control Over Financial Reporting

During the quarter ended March 31, 2017, the Partnership completed the implementation of a gathering and processing gas settlement, allocation and accounting system. The system was implemented by the Partnership to improve standardization and not in response to a deficiency in internal control over financial reporting. Management believes the implementation of the system and related changes to internal controls will enhance the Partnership's internal controls over financial reporting. Management believes the necessary steps have been taken to monitor and maintain appropriate internal control over financial reporting during this period of change and will continue to evaluate the operating effectiveness of related key controls during subsequent periods.

There were no other changes in our internal controls over financial reporting during the quarter ended March 31, 2017, 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 12 - 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, 2017.

Item 6. Exhibits

The following exhibits are filed herewith:

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.

39

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
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	Fourth Amended and Restated Agreement of Limited Partnership of Enable Midstream Partners, LP	Registrant’s Form 8-K filed June 22, 2016	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 among 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
*10.1	Enable Midstream Partners, LP Long Term Incentive Plan	Registrant’s registration statement on Form S-8, filed on April 11, 2014	File No. 333-195226	Exhibit 4.3
+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.

40

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, 2017	By:	/s/ Tom Levescy
			Tom Levescy
			Senior Vice President, Chief Accounting Officer and Controller
			(Principal Accounting Officer)

41

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 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 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, 2017

  /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 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 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, 2017

  /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, 2017, as filed with the Securities and Exchange Commission (the Report), each of the undersigned does hereby 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, 2017

          /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, 2017, as filed with the Securities and Exchange Commission (the Report), each of the undersigned does hereby 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, 2017

          /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, 2017	Apr. 14, 2017
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Entity Registrant Name	Enable Midstream Partners, LP
Entity Central Index Key	0001591763
Entity Filer Category	Large Accelerated Filer
Current Fiscal Year End Date	--12-31
Entity Common Stock, Shares Outstanding		224,534,129

XML

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues (including revenues from affiliates (Note 11)):
Product sales	$ 386	$ 245
Service revenue	280	264
Total Revenues	666	509
Cost and Expenses (including expenses from affiliates (Note 11)):
Cost of natural gas and natural gas liquids (excluding depreciation and amortization shown separately)	308	195
Operation and maintenance	89	95
General and administrative	25	20
Depreciation and amortization	88	81
Taxes other than income taxes	16	15
Total Cost and Expenses	526	406
Operating Income	140	103
Other Income (Expense):
Interest expense (including expenses from affiliates (Note 11))	(27)	(23)
Equity in earnings of equity method affiliate	7	7
Other, net	1	0
Total Other Expense	(19)	(16)
Income Before Income Taxes
Income Before Income Taxes	121	87
Income tax expense	1	1
Net Income
Net Income	120	86
Less: Net income attributable to noncontrolling interest
Less: Net income attributable to noncontrolling interest	0	0
Net Income Attributable to Limited Partners
Net Income Attributable to Limited Partners	120	86
Less: Series A Preferred Unit distributions (Note 4)
Less: Series A Preferred Unit distributions (Note 4)	9	0
Net Income Attributable to Common and Subordinated Units (Note 3)
Net Income Attributable to Common and Subordinated Units (Note 3)	111	86
Common Units
Net Income Attributable to Common and Subordinated Units (Note 3)
Net Income Attributable to Common and Subordinated Units (Note 3)	$ 58	$ 44
Basic and Diluted earnings (loss) per unit and weighted average number of units outstanding
Basic earnings per unit (Note 3)	$ 0.26	$ 0.21
Diluted earnings per unit (Note 3)	$ 0.26	$ 0.19
Subordinated Units
Net Income Attributable to Common and Subordinated Units (Note 3)
Net Income Attributable to Common and Subordinated Units (Note 3)	$ 53	$ 42
Basic and Diluted earnings (loss) per unit and weighted average number of units outstanding
Basic earnings per unit (Note 3)	$ 0.25	$ 0.20
Diluted earnings per unit (Note 3)	$ 0.25	$ 0.20

XML

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 17	$ 6
Restricted cash	14	17
Accounts receivable, net of allowance for doubtful accounts	231	249
Accounts receivable—affiliated companies	21	13
Inventory	40	41
Gas imbalances	24	41
Other current assets	28	29
Total current assets	375	396
Property, Plant and Equipment:
Property, plant and equipment	11,622	11,567
Less accumulated depreciation and amortization	1,496	1,424
Property, plant and equipment, net	10,126	10,143
Other Assets:
Intangible assets, net	299	306
Investment in equity method affiliate	325	329
Other	36	38
Total other assets	660	673
Total Assets	11,161	11,212
Current Liabilities:
Accounts payable	128	181
Accounts payable—affiliated companies	3	3
Taxes accrued	26	30
Gas imbalances	18	35
Other	104	113
Total current liabilities	279	362
Other Liabilities:
Accumulated deferred income taxes, net	10	10
Regulatory liabilities	20	19
Other	34	34
Total other liabilities	64	63
Long-Term Debt	3,047	2,993
Commitments and Contingencies (Note 12)
Partners’ Equity:
Common units	3,727	3,737
Subordinated units	3,670	3,683
Noncontrolling interest	12	12
Total Partners’ Equity	7,771	7,794
Total Liabilities and Partners’ Equity	11,161	11,212
Series A Preferred Units
Partners’ Equity:
Series A Preferred Units (14,520,000 issued and outstanding at March 31, 2017 and December 31, 2016)	$ 362	$ 362

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - shares	Mar. 31, 2017	Dec. 31, 2016
Common Units
Common and Subordinated units issued	224,532,260	224,535,454
Common units and Subordinated units outstanding	224,532,260	224,535,454
Subordinated Units
Common and Subordinated units issued	207,855,430	207,855,430
Common units and Subordinated units outstanding	207,855,430	207,855,430
Series A Preferred Units
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, 2017	Mar. 31, 2016
Cash Flows from Operating Activities:
Net income	$ 120	$ 86
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	88	81
Deferred income taxes	1	0
Loss on sale/retirement of assets	1	1
Equity in earnings of equity method affiliate	(7)	(7)
Return on investment in equity method affiliate	7	7
Equity based compensation	4	2
Amortization of debt costs and discount (premium)	(1)	(1)
Changes in other assets and liabilities:
Accounts receivable, net	18	19
Accounts receivable—affiliated companies	(8)	5
Inventory	1	8
Gas imbalance assets	17	3
Other current assets	1	0
Other assets	2	1
Accounts payable	(55)	(84)
Accounts payable—affiliated companies	0	(3)
Gas imbalance liabilities	(17)	(18)
Other current liabilities	(16)	15
Other liabilities	0	2
Net cash provided by operating activities	156	117
Cash Flows from Investing Activities:
Capital expenditures	(61)	(130)
Proceeds from sale of assets	1	0
Return of investment in equity method affiliate	4	13
Net cash used in investing activities	(56)	(117)
Cash Flows from Financing Activities:
Proceeds from long term debt, net of issuance costs	691	0
Proceeds from revolving credit facility	264	495
Repayment of revolving credit facility	(900)	(90)
Decrease in short-term debt	0	(236)
Repayment of notes payable—affiliated companies	0	(363)
Proceeds from issuance of Series A Preferred Units, net of issuance costs	0	362
Distributions	(147)	(134)
Net cash provided by (used in) financing activities	(92)	34
Net Increase in Cash, Cash Equivalents and Restricted Cash	8	34
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	23	4
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 31	$ 38

XML

Condensed Consolidated Statements of Partners' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Noncontrolling Interest	Series A Preferred Units Preferred Units	Common Units Partners' Capital	Subordinated Units Partners' Capital
Balance, beginning of period at Dec. 31, 2015	$ 7,531	$ 12	$ 0	$ 3,714	$ 3,805
Balance, beginning of period, units at Dec. 31, 2015			0	214	208
Changes in Partners' Capital
Net Income	86	0		$ 44	$ 42
Issuance of Series A Preferred Units	362		$ 362	0
Issuance of Series A Preferred Units, units			15
Distributions	(134)			(68)	(66)
Equity based compensation, net of units for employee taxes	2			2
Balance, end of period at Mar. 31, 2016	7,847	12	$ 362	$ 3,692	$ 3,781
Balance, end of period, units at Mar. 31, 2016			15	214	208
Balance, beginning of period at Dec. 31, 2016	7,794	12	$ 362	$ 3,737	$ 3,683
Balance, beginning of period, units at Dec. 31, 2016			15	224	208
Changes in Partners' Capital
Net Income	120		$ 9	$ 58	$ 53
Distributions	(147)	0	(9)	(72)	(66)
Equity based compensation, net of units for employee taxes	4			4
Balance, end of period at Mar. 31, 2017	$ 7,771	$ 12	$ 362	$ 3,727	$ 3,670
Balance, end of period, units at Mar. 31, 2017			15	224	208

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Organization

Enable Midstream Partners, LP (Partnership) is a Delaware limited partnership formed on May 1, 2013 by CenterPoint Energy, OGE Energy and ArcLight. The Partnership’s assets and operations are organized into two reportable segments: (i) gathering and processing and (ii) transportation and storage. The gathering and processing segment primarily provides natural gas and crude oil gathering and natural gas processing services to our producer 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. The Partnership’s 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 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, 2017, CenterPoint Energy held approximately 54.1% of the Partnership’s common and subordinated units, or 94,151,707 common units and 139,704,916 subordinated units, and OGE Energy held approximately 25.7% of the Partnership’s common and subordinated units, or 42,832,291 common units and 68,150,514 subordinated units. Additionally, CenterPoint Energy holds 14,520,000 Series A Preferred Units. See Note 4 for further information related to the 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 (Enable GP) on an annual or continuing basis and may not remove Enable GP 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, 2017, the Partnership owned a 50% interest in SESH. See Note 6 for further discussion of SESH.

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.  

 These condensed consolidated financial statements and the related financial statement disclosures 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 and (d) acquisitions and dispositions of businesses, assets and other interests.

For a description of the Partnership’s reportable segments, see Note 14.

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.

Restricted Cash

Restricted cash consists of cash which is restricted by agreements with third parties. The Condensed Consolidated Balance Sheets have $14 million and $17 million of restricted cash as of March 31, 2017 and December 31, 2016, respectively.

Accounts Receivable and 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 upon specific identification and estimates of future uncollectable amounts. On an ongoing basis, we evaluate our customers’ financial strength 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 at least quarterly, giving consideration to historical bad debt write-offs, the aging of receivables and specific customer circumstances that may impact their ability to pay the amounts due. Based on this review, management determined that a $4 million and $3 million allowance for doubtful accounts was required as of March 31, 2017 and December 31, 2016, respectively.

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New Accounting Pronouncements

3 Months Ended

Mar. 31, 2017

Accounting Changes and Error Corrections [Abstract]

New Accounting Pronouncements

New Accounting Pronouncements

Adopted Accounting Standards

Share-Based Compensation

In March 2016, the FASB issued ASU No. 2016-09, “Compensation—Stock Compensation (Topic 718).” This standard makes several modifications to Topic 718 related to the accounting for forfeitures, employer tax withholding on share-based compensation and the financial statement presentation of excess tax benefits or deficiencies. ASU 2016-09 also clarifies the statement of cash flows presentation for certain components of share-based awards. The standard is effective for interim and annual reporting periods beginning after December 15, 2016. The Partnership adopted the amendment in the first quarter of 2017, which had no material impact on our Condensed Consolidated Financial Statements and related disclosures.

Statement of Cash Flows

In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments.” This standard is intended to reduce existing diversity in practice in how certain transactions are presented on the statement of cash flows. The standard is effective for interim and annual reporting periods beginning after December 15, 2017, although early adoption is permitted. The Partnership adopted ASU No. 2016-15 in the first quarter of 2017, which had no material impact on our Condensed Consolidated Financial Statements and related disclosures.

Accounting Standards to be Adopted in Future Periods

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” which supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605).” Topic 606 is based on the core principle that revenue is recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Topic 606 also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract.

Topic 606 is effective for fiscal years beginning after December 15, 2017, and interim periods within those years, with early adoption permitted in 2017. However, we do not plan to adopt the standard early. Entities will have the option to apply the standard using a full retrospective or modified retrospective adoption method. The Partnership expects to adopt this ASU using the modified retrospective method. Our evaluation of the impact on our Consolidated Financial Statements and related disclosures is ongoing and not complete. In connection with our assessment work, we formed an implementation work team, completed training on the Topic 606 revenue recognition model and are continuing our review of contracts relative to the provisions of Topic 606.

Leases

In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” This standard requires, among other things, that lessees recognize the following for all leases (with the exception of short-term leases) at the commencement date: (1) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Lessees and lessors must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Partnership expects to adopt this standard by the first quarter of 2019 and is currently evaluating the impact of this standard on our Condensed Consolidated Financial Statements and related disclosures. In connection with our assessment work, we formed an implementation work team and are continuing our review of our contracts relative to the provisions of the lease standard.

Financial Instruments—Credit Losses

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” This standard requires entities to measure all expected credit losses of financial assets held at a reporting date based on historical experience, current conditions, and reasonable and supportable forecasts in order to record credit losses in a more timely matter. ASU 2016-13 also amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The standard is effective for interim and annual reporting periods beginning after December 15, 2019, although early adoption is permitted for interim and annual periods beginning after December 15, 2018. The Partnership does not expect the adoption of this standard to have a material impact on our Condensed Consolidated Financial Statements and related disclosures.

Income Taxes

In October 2016, the FASB issued ASU No. 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory.” This standard requires entities to recognize the tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The standard is effective for interim and annual reporting periods beginning after December 15, 2017, although early adoption is permitted as of the beginning of an annual period (i.e., only in the first interim period). The guidance requires application using a modified retrospective approach. The Partnership does not expect the adoption of this standard to have a material impact on our Condensed Consolidated Financial Statements and related disclosures.

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Earnings Per Limited Partner Unit

3 Months Ended

Mar. 31, 2017

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 and subordinated units:

	Three Months Ended   March 31,
	2017		2016
	(In millions, except per unit data)
Net income	$	120	$	86
Net income attributable to noncontrolling interest	—		—
Series A Preferred Unit distribution	9		—
General partner interest in net income	—		—
Net income available to common and subordinated unitholders	$	111	$	86
Net income allocable to common units	$	58	$	44
Net income allocable to subordinated units	53		42
Net income available to common and subordinated unitholders	$	111	$	86
Net income allocable to common units	$	58	$	44
Dilutive effect of Series A Preferred Unit distributions	—		—
Diluted net income allocable to common units	58		44
Diluted net income allocable to subordinated units	53		42
Total	$	111	$	86
Basic weighted average number of outstanding
Common units(1)	225		214
Subordinated units	208		208
Total	433		422
Basic earnings per unit
Common units	$	0.26	$	0.21
Subordinated units	$	0.25	$	0.20
Basic weighted average number of outstanding common units	225		214
Dilutive effect of Series A Preferred Units	—		21
Dilutive effect of performance units	1		—
Diluted weighted average number of outstanding common units	226		235
Diluted weighted average number of outstanding subordinated units	208		208
Total	434		443
Diluted earnings per unit
Common units	$	0.26	$	0.19
Subordinated units	$	0.25	$	0.20

____________________

(1) Basic weighted average number of outstanding common units for the three months ended March 31, 2017 includes approximately one million time-based phantom units.

The dilutive effect of the unit-based awards discussed in Note 13 was less than $0.01 per unit during each of the three months ended March 31, 2017 and 2016.

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Partners' Equity

3 Months Ended

Mar. 31, 2017

Equity [Abstract]

Partners' Equity

Partners’ Equity

The Partnership Agreement requires that, within 60 days subsequent to 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 and subordinated unitholders during 2016 and 2017 (in millions, except for per unit amounts):

Quarter Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2017(1)	May 23, 2017	May 30, 2017	$	0.318	$	137
December 31, 2016	February 21, 2017	February 28, 2017	$	0.318	$	137
September 30, 2016	November 14, 2016	November 22, 2016	$	0.318	$	134
June 30, 2016	August 16, 2016	August 23, 2016	$	0.318	$	134
March 31, 2016	May 6, 2016	May 13, 2016	$	0.318	$	134
December 31, 2015	February 2, 2016	February 12, 2016	$	0.318	$	134

_____________________

(1) The board of directors of Enable GP declared this $0.318 per common unit cash distribution on May 2, 2017, to be paid on May 30, 2017, to common and subordinated unitholders of record at the close of business on May 23, 2017.

The Partnership paid or has authorized payment of the following cash distributions to holders of the Series A Preferred Units during 2016 and 2017 (in millions, except for per unit amounts):

Quarter Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2017(1)	May 2, 2017	May 12, 2017	$	0.625	$	9
December 31, 2016	February 10, 2017	February 15, 2017	$	0.625	$	9
September 30, 2016	November 1, 2016	November 14, 2016	$	0.625	$	9
June 30, 2016	August 2, 2016	August 12, 2016	$	0.625	$	9
March 31, 2016 (2)	May 6, 2016	May 13, 2016	$	0.2917	$	4

_____________________

(1) The board of directors of Enable GP declared a $0.625 per Series A Preferred Unit cash distribution on May 2, 2017, to be paid on May 12, 2017, to Series A Preferred unitholders of record at the close of business on May 2, 2017.

(2) The prorated quarterly distribution for the Series A Preferred Units is for a partial period beginning on February 18, 2016, and ending on March 31, 2016, which equates to $0.625 per unit on a full-quarter basis or $2.50 per unit on an annualized basis.

General Partner Interest and Incentive Distribution Rights

Enable GP owns a non-economic general partner interest in the Partnership and thus will not be entitled to distributions that the Partnership makes prior to the liquidation of the Partnership in respect of such general partner interest. Enable GP currently holds incentive distribution rights that entitle it to receive increasing percentages, up to a maximum of 50.0%, of the cash the Partnership distributes from operating surplus (as defined in the Partnership Agreement) in excess of $0.330625 per unit per quarter. The maximum distribution of 50.0% does not include any distributions that Enable GP or its affiliates may receive on common units or subordinated units that they own.

Subordinated Units

General

As of March 31, 2017, all subordinated units are held by CenterPoint Energy and OGE Energy. These units are considered subordinated because for a period of time, defined by the Partnership Agreement as the subordination period, the subordinated units will not be entitled to receive any distributions until the common units have received distributions of available cash each quarter from operating surplus in an amount equal to the minimum quarterly distribution, plus any arrearages on minimum quarterly distributions on the common units from prior quarters. In addition, the subordinated units are not entitled to arrearages on minimum quarterly distributions. On the expiration of the subordination period, the subordinated units will convert to common units on a one-for-one basis.

Subordination Period

The subordination period began on the closing date of the IPO and expires on the first to occur of the following dates: (1) the first business day following the distribution of available cash in respect of any quarter beginning with the quarter ending June 30, 2017 that the following tests are met: (a) distributions of available cash from operating surplus on each of the outstanding common units and subordinated units equal or exceed $1.15 per unit (the annualized minimum quarterly distribution) for each of the three consecutive, non-overlapping four-quarter periods immediately preceding that date; (b) the adjusted operating surplus generated during each of the three consecutive, non-overlapping four-quarter periods immediately preceding that date equaled or exceeded the sum $1.15 (the annualized minimum quarterly distribution) on all of the common units and subordinated units outstanding during those periods on a fully diluted weighted average basis; and (c) there are no arrearages in the payment of the minimum quarterly distributions on the common units or (2) the first business day following the distribution of available cash in respect of any quarter beginning with the quarter ending June 30, 2015 that the following tests are met: (a) distributions of available cash from operating surplus on each of the outstanding common units and subordinated units equal to or exceeding $1.725 per unit (150% of the annualized minimum quarterly distribution) for the four consecutive quarter period immediately preceding that date; (b) the adjusted operating surplus generated during the four consecutive quarter period immediately preceding that date equaled or exceed $1.725 per unit (150% of the annualized minimum quarterly distribution) on all of the common units and subordinated units outstanding during that period on a fully diluted weighted average basis plus the corresponding incentive distribution rights; and (c) there are no arrearages in the payment of the minimum quarterly distributions on the common units.

Series A Preferred Units

On February 18, 2016, the Partnership completed the private placement of 14,520,000 Series A Preferred Units representing limited partner interests in the Partnership for a cash purchase price of $25.00 per Series A Preferred Unit, resulting in proceeds of $362 million, net of issuance costs. The Partnership incurred approximately $1 million of expenses related to the offering, which is shown as an offset to the proceeds. In connection with the closing of the private placement, the Partnership redeemed approximately $363 million of notes scheduled to mature in 2017 payable to a wholly-owned subsidiary of CenterPoint Energy.

Pursuant to the Partnership Agreement, the Series A Preferred Units:

• rank senior to the Partnership’s common units with respect to the payment of distributions and distribution of assets upon liquidation, dissolution and winding up;

• have no stated maturity;

• are not subject to any sinking fund; and

• will remain outstanding indefinitely unless repurchased or redeemed by the Partnership or converted into its common units in connection with a change of control.

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 to, but not including, the five year anniversary of the original issue date; and thereafter a percentage of the stated liquidation preference equal to the sum of the three-month LIBOR plus 8.5%.

At any time on or after five years after the original issue date, the Partnership may redeem the Series A Preferred Units, in whole or in part, from any source of funds legally available for such purpose, by paying $25.50 per unit plus an amount equal to all accumulated and unpaid distributions thereon to the date of redemption, whether or not declared. In addition, the Partnership (or a third-party with its prior written consent) may redeem the Series A Preferred Units following certain changes in the methodology employed by ratings agencies, changes of control or fundamental transactions as set forth in the Partnership Agreement. If, upon a change of control or certain fundamental transactions, the Partnership (or a third-party with its prior written consent) does not exercise this option, then the holders of the Series A Preferred Units have the option to convert the Series A Preferred Units into a number of common units per Series A Preferred Unit as set forth in the Partnership Agreement. The Series A Preferred Units are also required to be redeemed in certain circumstances if they are not eligible for trading on the New York Stock Exchange.

Holders of Series A Preferred Units have no voting rights except for limited voting rights with respect to potential amendments to the Partnership Agreement that have a material adverse effect on the existing terms of the Series A Preferred Units, the issuance by the Partnership of certain securities, approval of certain fundamental transactions and as required by law.

Upon the transfer of any Series A Preferred Unit to a non-affiliate of CenterPoint Energy, the Series A Preferred Units will automatically convert into a new series of preferred units (the Series B Preferred Units) on the later of the date of transfer and the second anniversary of the date of issue. The Series B Preferred Units will have the same terms as the Series A Preferred Units except that unpaid distributions on the Series B Preferred Units will accrue on a cumulative basis until paid.

On February 18, 2016, the Partnership entered into a registration rights agreement with CenterPoint Energy, pursuant to which, among other things, the Partnership gave CenterPoint Energy certain rights to require the Partnership to file and maintain a registration statement with respect to the resale of the Series A Preferred Units and any other series of preferred units or common units representing limited partner interests in the Partnership that are issuable upon conversion of the Series A Preferred Units.

2016 Equity Issuance

On November 29, 2016, the Partnership closed a public offering of 10,000,000 common units at a price to the public of $14.00 per common unit. In connection with the offering, the Partnership, the underwriters and an affiliate of ArcLight entered into an underwriting agreement that provided an option for the underwriters to purchase up to an additional 1,500,000 common units, with 75,719 common units to be sold by the Partnership and 1,424,281 to be sold by the affiliate of ArcLight. The underwriters exercised the option to purchase all of the additional common units, and the Partnership received proceeds (net of underwriting discounts, structuring fees and offering expenses) of $137 million from the offering.

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Assessing Impairment of Long-lived Assets (including Intangible Assets)

3 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Assessing Impairment of Long-lived Assets (including Intangible Assets)

Assessing 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. The Partnership recorded no impairments to long-lived assets in the three months ended March 31, 2017 or 2016. Based upon review of forecasted undiscounted cash flows, none of the asset groups were at risk of failing step one of the impairment test. Commodity price declines, throughput declines, cost increases, regulatory or political environment changes, and other changes in market conditions could reduce forecast undiscounted cash flows.

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Investment in Equity Method Affiliate

3 Months Ended

Mar. 31, 2017

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 Spectra Energy Partners, LP 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, Spectra Energy Partners, LP 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 Spectra Energy Partners, LP 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. During the three months ended March 31, 2017 and 2016, the Partnership billed SESH $5 million and $4 million, respectively, associated with these service agreements.

Equity in Earnings of Equity Method Affiliate:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
SESH	$	7	$	7

Distributions from Equity Method Affiliate:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
SESH (1)	$	11	$	20

____________________

(1) Distributions from equity method affiliate includes a $7 million and $7 million return on investment and a $4 million and $13 million return of investment for the three months ended March 31, 2017 and 2016, respectively.

Summarized financial information of SESH:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Income Statements:
Revenues	$	28	$	29
Operating income	$	17	$	19
Net income	$	13	$	14

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Debt

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Debt

Debt

The following table presents the Partnership’s outstanding debt as of March 31, 2017 and December 31, 2016.

	March 31, 2017							December 31, 2016
	Outstanding Principal		Premium (Discount)			Total Debt		Outstanding Principal		Premium (Discount)			Total Debt
	(In millions)
Revolving Credit Facility	$	—	$	—		$	—	$	636	$	—		$	636
2015 Term Loan Agreement	450		—			450		450		—			450
2019 Notes	500		—			500		500		—			500
2024 Notes	600		(1		)	599		600		(1		)	599
2027 Notes	700		(3		)	697		—		—			—
2044 Notes	550		—			550		550		—			550
EOIT Senior Notes	250		17			267		250		18			268
Total debt	$	3,050	$	13		$	3,063	$	2,986	$	17		$	3,003
Less: Unamortized debt expense (1)						16							10
Total long-term debt						$	3,047						$	2,993

____________________

(1) As of March 31, 2017 and December 31, 2016, there was an additional $4 million and $5 million, respectively, of unamortized debt expense related to the Revolving Credit Facility included in Other long-term assets, not included above.

Revolving Credit Facility

On June 18, 2015, the Partnership amended and restated its Revolving Credit Facility that matures on June 18, 2020. As of March 31, 2017, there were no principal advances and $3 million in letters of credit outstanding under the $1.75 billion Revolving Credit Facility due June 18, 2020.

The Revolving Credit Facility provides that outstanding borrowings bear interest at 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 applicable credit ratings. As of March 31, 2017, 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 applicable credit rating from the rating agencies. As of March 31, 2017, the commitment fee under the 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.

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 was no amount outstanding under our commercial paper program at each of March 31, 2017 and December 31, 2016. On February 2, 2016, Standard & Poor’s Ratings Services lowered its credit rating on the Partnership from an investment grade rating to a non-investment grade rating. The short-term rating on the Partnership was also reduced from an investment grade rating to a non-investment grade rating. As a result of the downgrade, the Partnership repaid its outstanding borrowings under the commercial paper program upon maturity and did not issue any additional commercial paper.

Term Loan Agreement

On July 31, 2015, the Partnership entered into a Term Loan Agreement, providing for an unsecured three-year $450 million term loan agreement (2015 Term Loan Agreement). The entire $450 million principal amount of the 2015 Term Loan Agreement was borrowed by the Partnership on July 31, 2015. The 2015 Term Loan Agreement contains an option, which may be exercised up to two times, to extend the term of the 2015 Term Loan Agreement, in each case, for an additional one-year term. The 2015 Term Loan Agreement provides an option to prepay, without penalty or premium, the amount outstanding, or any portion thereof, in a minimum amount of $1 million, or any multiple of $0.5 million in excess thereof. As of March 31, 2017, there was $450 million outstanding under the 2015 Term Loan Agreement.

The 2015 Term Loan Agreement provides that outstanding borrowings bear interest at LIBOR and/or an alternate base rate, at the Partnership’s election, plus an applicable margin. The applicable margin is based on our applicable credit ratings. As ofMarch 31, 2017, the applicable margin for LIBOR-based borrowings under the 2015 Term Loan Agreement was 1.375% based on the Partnership’s credit ratings.As of March 31, 2017, the weighted average interest rate of the 2015 Term Loan Agreement was 2.15%.

The 2015 Term Loan Agreement contains substantially the same covenants as the Revolving Credit Facility.

Senior Notes

On March 9, 2017, the Partnership completed the public offering of $700 million 4.400% Senior Notes due 2027 (2027 Notes). The Partnership received net proceeds of approximately $691 million. The proceeds were used for general partnership purposes, including to repay amounts outstanding under the Revolving Credit Facility. The 2027 Notes had an unamortized discount of $3 million and unamortized debt expense of $6 million at March 31, 2017, resulting in an effective interest rate of 4.58% during the three months ended March 31, 2017.

In addition to the 2027 Notes, as of March 31, 2017, the Partnership’s debt included the 2019 Notes, 2024 Notes and 2044 Notes, which had $1 million of unamortized discount and $10 million of unamortized debt expense at March 31, 2017, resulting in effective interest rates of 2.58%, 4.02% and 5.08%, respectively, during the three months ended March 31, 2017.

As of March 31, 2017, the Partnership’s debt included EOIT’s $250 million6.25% senior notes due March 2020 (the EOIT Senior Notes). The EOIT Senior Notes had $17 million of unamortized premium at March 31, 2017, resulting in an effective interest rate of 3.86%, during the three months ended March 31, 2017. These senior notes do not contain any financial covenants other than a limitation on liens. This limitation on liens is subject to certain exceptions and qualifications.

 As of March 31, 2017, the Partnership and EOIT were in compliance with all of their debt agreements, including financial covenants.

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Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

Derivative Instruments and Hedging Activities

The Partnership is exposed to certain risks relating to its ongoing business operations. The primary risk managed using derivative instruments is commodity price risk. The Partnership is also exposed to credit risk in its business operations.

Commodity Price Risk

The Partnership has used forward physical contracts, commodity price swap contracts and commodity price option features to manage the Partnership’s commodity price risk exposures in the past. Commodity derivative instruments used by the Partnership are as follows:

• NGL put options, NGL futures and swaps, and WTI crude oil futures and swaps for condensate sales are used to manage the Partnership’s NGL and condensate exposure associated with its processing agreements;

• natural gas futures and swaps are used to manage the Partnership’s natural gas exposure associated with its gathering, processing and transportation and storage assets; and

• natural gas futures and swaps, natural gas options and natural gas commodity purchases and sales are used to manage the Partnership’s natural gas exposure associated with its storage and transportation contracts and asset management activities.

Normal purchases and normal sales contracts are not recorded in Other Assets or Liabilities in the Condensed Consolidated Balance Sheets and earnings are recognized and recorded in the period in which physical delivery of the commodity occurs. Management applies normal purchases and normal sales treatment to: (i) commodity contracts for the purchase and sale of natural gas used in or produced by the Partnership’s operations and (ii) commodity contracts for the purchase and sale of NGLs produced by the Partnership’s gathering and processing business.

The Partnership recognizes its non-exchange traded derivative instruments as Other Assets or Liabilities in the Condensed Consolidated Balance Sheets at fair value with such amounts classified as current or long-term based on their anticipated settlement. Exchange traded transactions are settled on a net basis daily through margin accounts with a clearing broker and, therefore, are recorded at fair value on a net basis in Other Current Assets in the Condensed Consolidated Balance Sheets.

As of March 31, 2017 and December 31, 2016, the Partnership had no derivative instruments that were designated as cash flow or fair value hedges for accounting purposes.

Credit Risk

The Partnership is exposed to certain credit risks relating to its ongoing business operations. Credit risk includes the risk that counterparties that owe the Partnership money or energy will breach their obligations. If the counterparties to these arrangements fail to perform, the Partnership may seek or be forced to enter into alternative arrangements. In that event, the Partnership’s financial results could be adversely affected, and the Partnership could incur losses.

Derivatives Not Designated As Hedging Instruments

Derivative instruments not designated as hedging instruments for accounting purposes are utilized in the Partnership’s asset management activities. 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

The majority of natural gas physical purchases and sales not designated as hedges for accounting purposes are priced based on a monthly or daily index, and the fair value is subject to little or no market price risk. Natural gas physical sales volumes exceed natural gas physical purchase volumes due to the marketing of natural gas volumes purchased via the Partnership’s processing contracts, which are not derivative instruments.

As of March 31, 2017 and December 31, 2016, the Partnership had the following derivative instruments that were not designated as hedging instruments for accounting purposes:

	March 31, 2017		December 31, 2016
	Gross Notional Volume
	Purchases	Sales	Purchases	Sales
Natural gas—TBtu(1)
Financial fixed futures/swaps	5	24	2	29
Financial basis futures/swaps	5	25	2	30
Physical purchases/sales	1	45	1	25
Crude oil (for condensate)—MBbl(2)
Financial Futures/swaps	—	390	—	540
Natural gas liquids—MBbl(3)
Financial Futures/swaps	—	1,563	60	1,133

____________________

(1) As of March 31, 2017, 95.9% of the natural gas contracts had durations of one year or less and 4.1% had durations of more than one year and less than two years. As of December 31, 2016, 100.0% of the natural gas contracts had durations of one year or less.

(2) As of March 31, 2017 and December 31, 2016, 100% of the crude oil (for condensate) contracts had durations of one year or less.

(3) As of March 31, 2017, 51.1% of the natural gas liquids contracts had durations of one year or less and 48.9% had durations of more than one year and less than two years. As of December 31, 2016, 100% of the natural gas liquid contracts had durations of one year or less.

Balance Sheet Presentation Related to Derivative Instruments

The fair value of the derivative instruments that are presented in the Partnership’s Condensed Consolidated Balance Sheets as of March 31, 2017 and December 31, 2016 that were not designated as hedging instruments for accounting purposes are as follows:

		March 31, 2017				December 31, 2016
		Fair Value
Instrument	Balance Sheet Location	Assets		Liabilities		Assets		Liabilities
		(In millions)
Natural gas
Financial futures/swaps	Other Current/Other	$	2	$	8	$	2	$	22
Physical purchases/sales	Other Current/Other	1		—		—		1
Crude oil (for condensate)
Financial futures/swaps	Other Current/Other	1		1		—		3
Natural gas liquids
Financial Futures/swaps	Other Current/Other	—		3		—		8
Total gross derivatives (1)		$	4	$	12	$	2	$	34

_____________________

(1) See Note 9 for a reconciliation of the Partnership’s total derivatives fair value to the Partnership’s Condensed Consolidated Balance Sheets as of March 31, 2017 and December 31, 2016.

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 for the three months ended March 31, 2017 and 2016:

	Amounts Recognized in Income
	Three Months Ended   March 31,
	2017		2016
	(In millions)
Natural gas
Financial futures/swaps gains (losses)	$	11	$	10
Physical purchases/sales gains (losses)	5		(4		)
Crude oil (for condensate)
Financial futures/swaps gains (losses)	3		1
Natural gas liquids
Financial futures/swaps gains (losses)	2		(4		)
Total	$	21	$	3

For derivatives not designated as hedges in the tables above, amounts recognized in income for the periods ended March 31, 2017 and 2016, 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 for the three months ended March 31, 2017 and 2016:

	Three Months Ended   March 31,
	2017			2016
	(In millions)
Change in fair value of derivatives	$	24		$	(8	)
Realized gain (loss) on derivatives	(3		)	11
Gain on derivative activity	$	21		$	3

Credit-Risk Related Contingent Features in Derivative Instruments

Based upon the Partnership’s senior unsecured debt rating with Moody’s Investors Services or Standard & Poor’s Ratings Services, the Partnership could be required to provide 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, 2017, under these obligations, $1 million of cash collateral has been posted. Based on positions as of March 31, 2017, approximately $1 million of additional collateral may be required to be posted by the Partnership.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2017

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. Hierarchical levels, as defined below and directly related to the amount of subjectivity associated with the inputs to fair valuations of these assets and liabilities are as follows:

Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date. Instruments classified as Level 1 include natural gas futures, swaps and options transactions for contracts traded on the NYMEX and settled through a NYMEX clearing broker.

Level 2: Inputs, other than quoted prices included in Level 1, are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices for similar instruments in active markets, and inputs other than quoted prices that are observable for the asset or liability. Fair value assets and liabilities that are generally included in this category are derivatives with fair values based on inputs from actively quoted markets. Instruments classified as Level 2 include over-the-counter NYMEX natural gas swaps, natural gas basis swaps and natural gas purchase and sales transactions in markets such that the pricing is closely related to the NYMEX pricing, and over-the-counter WTI crude oil swaps for condensate sales.

Level 3: Inputs are unobservable for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. Unobservable inputs reflect the Partnership’s judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. The Partnership develops these inputs based on the best information available, including the Partnership’s own data.

The Partnership utilizes the market approach in determining the fair value of its derivative positions by using either NYMEX or WTI published market prices, independent broker pricing data or broker/dealer valuations. The valuations of derivatives with pricing based on NYMEX published market prices may be considered Level 1 if they are settled through a NYMEX clearing broker account with daily margining. Over-the-counter derivatives with NYMEX or WTI based prices are considered Level 2 due to the impact of counterparty credit risk. Valuations based on independent broker pricing or broker/dealer valuations may be classified as Level 2 only to the extent they may be validated by an additional source of independent market data for an identical or closely related active market. In certain less liquid markets or for longer-term contracts, forward prices are not as readily available. In these circumstances, contracts are valued using internally developed methodologies that consider historical relationships among various quoted prices in active markets that result in management’s best estimate of fair value. These contracts are classified as Level 3.

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 period ended March 31, 2017, there were no transfers between levels.

The impact to the fair value of derivatives due to credit risk is calculated using the probability of default based on Standard & Poor’s Ratings Services and/or internally generated ratings. The fair value of derivative assets is adjusted for credit risk. The fair value of derivative liabilities is adjusted for credit risk only if the impact is deemed material.

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 as of March 31, 2017 and December 31, 2016.

	March 31, 2017				December 31, 2016
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(In millions)
Long-Term Debt
Revolving Credit Facility (Level 2)	$	—	$	—	$	636	$	636
2015 Term Loan Agreement (Level 2)	450		450		450		450
2019 Notes (Level 2)	500		495		500		490
2024 Notes (Level 2)	599		584		599		564
2027 Notes (Level 2)	697		695		—		—
2044 Notes (Level 2)	550		503		550		467
EOIT Senior Notes (Level 2)	267		268		268		260

The fair value of the Partnership’s Revolving Credit Facility, 2015 Term Loan Agreement, EOIT Senior Notes, 2019 Notes, 2024 Notes, 2027 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, 2017, no material fair value adjustments or fair value measurements were required for these non-financial assets or liabilities.

Contracts with Master Netting Arrangements

Fair value amounts recognized for forward, interest rate swap, option and other conditional or exchange contracts executed with the same counterparty under a master netting arrangement may be offset. The reporting entity’s choice to offset or not must be applied consistently. A master netting arrangement exists if the reporting entity has multiple contracts, whether for the same type of conditional or exchange contract or for different types of contracts, with a single counterparty that are subject to a contractual agreement that provides for the net settlement of all contracts through a single payment in a single currency in the event of default on or termination of any one contract. Offsetting the fair values recognized for forward, interest rate swap, option and other conditional or exchange contracts outstanding with a single counterparty results in the net fair value of the transactions being reported as an asset or a liability in the Condensed Consolidated Balance Sheets. The Partnership has presented the fair values of its derivative contracts under master netting agreements using a net fair value presentation.

The following tables summarize the Partnership’s assets and liabilities that are measured at fair value on a recurring basis as of March 31, 2017 and December 31, 2016:

March 31, 2017	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	$	7	$	—	$	—
Significant other observable inputs (Level 2)	2		2		23		9
Unobservable inputs (Level 3)	—		3		—		—
Total fair value	4		12		23		9
Netting adjustments	—		—		—		—
Total	$	4	$	12	$	23	$	9

December 31, 2016	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	$	22	$	—	$	—
Significant other observable inputs (Level 2)	—		4		41		30
Unobservable inputs (Level 3)	—		8		—		—
Total fair value	2		34		41		30
Netting adjustments	—		—		—		—
Total	$	2	$	34	$	41	$	30

______________________

(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. Gas imbalances held by EOIT are valued using an average of the Inside FERC Gas Market Report for Panhandle Eastern Pipe Line Co. (Texas, Oklahoma Mainline), ONEOK (Oklahoma) and ANR Pipeline (Oklahoma) indices. There were no netting adjustments as of March 31, 2017 and December 31, 2016.

(2) Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $1 million and zero at March 31, 2017 and December 31, 2016, 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 $9 million and $5 million at March 31, 2017 and December 31, 2016, 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.

Changes in Level 3 Fair Value Measurements

The following table provides a reconciliation of changes in the fair value of our Level 3 commodity contracts between the periods presented.

	Commodity Contracts
	Natural gas liquids  financial futures/swaps
	(In millions)
Balance as of December 31, 2016	$	(8	)
Gains included in earnings	2
Settlements	3
Balance as of March 31, 2017	$	(3	)

Quantitative Information on Level 3 Fair Value Measurements

The Partnership utilizes the market approach to measure the fair value of our commodity contracts. The significant unobservable inputs used in this approach to fair value are longer dated price quotes. Our sensitivity to these longer dated forward curve prices are presented in the table below. Significant changes in any of those inputs in isolation would result in significantly different fair value measurements, depending on our short or long position in contracts.

	March 31, 2017
Product Group	Fair Value			Forward Curve Range
	(In millions)			(Per gallon)
Natural gas liquids	$	(3	)	$0.285 - $0.855

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Supplemental Disclosure of Cash Flow Information

3 Months Ended

Mar. 31, 2017

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,
	2017		2016
	(In millions)
Supplemental Disclosure of Cash Flow Information:
Cash Payments:
Interest, net of capitalized interest	$	14	$	15
Income taxes, net of refunds	—		1
Non-cash transactions:
Accounts payable related to capital expenditures	20		42

The following table reconciles cash and cash equivalents and restricted cash on the Condensed Consolidated Balance Sheets to cash, cash equivalents and restricted cash on the Condensed Consolidated Statement of Cash Flows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Cash and cash equivalents	$	17	$	38
Restricted cash	14		—
Cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statements of Cash Flows	$	31	$	38

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Related Party Transactions

3 Months Ended

Mar. 31, 2017

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions

The material related party transactions with CenterPoint Energy, OGE Energy and their respective subsidiaries are summarized below. There were no material related party transactions with other affiliates.

Transportation and Storage Agreements

Transportation and Storage Agreements with CenterPoint Energy

EGT provides the following services to CenterPoint Energy’s LDCs in Arkansas, Louisiana, Oklahoma and Northeast Texas: (1) firm transportation with seasonal contract demand, (2) firm storage, (3) no notice transportation with associated storage and (4) maximum rate firm transportation. The first three services are in effect through March 31, 2021, and will remain in effect from year to year thereafter unless either party provides 180 days’ written notice prior to the contract termination date. The maximum rate firm transportation is in effect through March 31, 2018. MRT provides firm transportation and firm storage services to CenterPoint Energy’s LDCs under agreements that are in effect through May 15, 2018, but will continue year to year thereafter unless either party provides twelve months’ written notice prior to the contract termination date.

Transportation and Storage Agreement with OGE Energy

EOIT provides no-notice load-following transportation and storage services to OGE Energy. On March 17, 2014, EOIT entered into a transportation agreement with OGE Energy, with a primary term of May 1, 2014 through April 30, 2019. Following the primary term, the agreement will remain in effect from year to year thereafter unless either party provides notice of termination to the other party at least 180 days prior to the commencement of the succeeding annual period.

On December 6, 2016, EOIT entered into a transportation agreement with OGE Energy, with a primary term expected to begin in late 2018 and extend for 20 years. In connection with the agreement, an approximately 80 mile pipeline will be built to serve OGE Energy’s Muskogee Power Plant.

Gas Sales and Purchases Transactions

The Partnership sells natural gas volumes to affiliates of CenterPoint Energy and OGE Energy or purchases natural gas volumes from affiliates of CenterPoint Energy through a combination of forward, monthly and daily transactions. The Partnership enters into these physical natural gas transactions in the normal course of business based upon relevant market prices.

The Partnership’s revenues from affiliated companies accounted for 6% and 9% of total revenues during the three months ended March 31, 2017 and 2016, respectively. Amounts of revenues from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income are summarized as follows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Gas transportation and storage service revenue — CenterPoint Energy	$	33	$	33
Natural gas product sales — CenterPoint Energy	—		1
Gas transportation and storage service revenue — OGE Energy	9		9
Natural gas product sales — OGE Energy	—		1
Total revenues — affiliated companies	$	42	$	44

Amounts of natural gas purchased from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income are summarized as follows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Cost of natural gas purchases — CenterPoint Energy	$	—	$	—
Cost of natural gas purchases — OGE Energy	3		2
Total cost of natural gas purchases — affiliated companies	$	3	$	2

Corporate services and seconded employee expense

As of March 31, 2017, 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 employee costs arising out of OGE Energy’s defined benefit and retiree medical plans is fixed at $5 million in 2017 and at actual cost subject to a cap of $5 million in 2018 and thereafter, in the event of continued secondment.

Under the terms of the MFA, the Partnership receives services and support functions from each of CenterPoint Energy and OGE Energy under service agreements for an initial term that ended on April 30, 2016. The service 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 these service 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 2017 are $3 million and $4 million, respectively.

On November 1, 2016, the Partnership entered into a new lease with an affiliate of CenterPoint Energy pursuant to which the Partnership leases office space in Shreveport, Louisiana. The term of the lease was effective on October 1, 2016 and extends through December 31, 2019. The Partnership expects to incur approximately $3 million in rent and maintenance expenses through the end of the initial term of the lease. Prior to October 1, 2016, CenterPoint Energy provided the office space in Shreveport, Louisiana, under the services agreement. As of March 31, 2017, CenterPoint Energy continues to provide office and data center space to the Partnership in Houston, Texas, under the services agreement.

Amounts charged to the Partnership by affiliates for seconded employees and corporate services, included primarily in Operation and maintenance and General and administrative expenses in the Partnership’s Condensed Consolidated Statements of Income are as follows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Corporate Services — CenterPoint Energy	$	1	$	2
Seconded Employee Costs — OGE Energy	7		9
Corporate Services — OGE Energy	1		2
Total corporate services and seconded employees expense	$	9	$	13

Series A Preferred Units

On February 18, 2016, the Partnership completed the private placement, with CenterPoint Energy, of 14,520,000 Series A Preferred Units representing limited partner interests in the Partnership for a cash purchase price of $25.00 per Series A Preferred Unit, resulting in proceeds of $362 million, net of issuance costs. See Note 4 for further discussion of the Series A Preferred Units.

Notes payable

On February 18, 2016, in connection with the private placement of the Series A Preferred Units, the Partnership redeemed $363 million of notes payable—affiliated companies payable to a subsidiary of CenterPoint Energy.

The Partnership recorded affiliated interest expense to CenterPoint Energy on notes payable—affiliated companies of zero and $1 million during the three months ended March 31, 2017 and 2016, respectively.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2017

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.

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Equity Based Compensation

3 Months Ended

Mar. 31, 2017

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

Equity Based Compensation

Equity Based Compensation

The following table summarizes the Partnership’s compensation expense for the three months ended March 31, 2017 and 2016 related to performance units, restricted units, and phantom units for the Partnership’s employees and independent directors:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Performance units	$	3	$	1
Restricted units	—		1
Phantom units	1		—
Total compensation expense	$	4	$	2

Units Outstanding

The Partnership periodically grants performance units, restricted units, and phantom units to certain employees under the Enable Midstream Partners, LP Long Term Incentive Plan. A summary of the activity for the Partnership’s performance units, restricted units, and phantom units applicable to the Partnership’s employees at March 31, 2017 and changes during 2017 are shown in the following table.

	Performance Units					Restricted Units					Phantom Units
	Number of Units (1)			Weighted Average Grant-Date Fair Value, Per Unit		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, 2016	1,969,107			$	15.27	392,995			$	20.74	643,604			$	8.49
Granted	468,626			19.27		—			—		376,385			16.26
Vested	—			—		—			—		—			—
Forfeited	(18,217		)	15.20		(3,194		)	21.54		(3,580		)	8.12
Units Outstanding at March 31, 2017	2,419,516			$	16.05	389,801			$	20.74	1,016,409			$	11.37
Aggregate Intrinsic Value of Units Outstanding at March 31, 2017	$	40				$	7				$	17

_____________________

(1) Performance units outstanding as of March 31, 2017 include 336,322 units from the annual grant, which were approved by the Board of Directors in 2014. The results of the performance units were certified by the Compensation Committee in February 2017, at a 91.5% payout based on the level of achievement of a performance goal established by the Board of Directors over a performance period of April 11, 2014 through December 31, 2016. Additional information related to the performance goal is described in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2014. The reduction in outstanding units for a payout percentage of an amount other than 100% is not reflected above until the vesting date.

Unrecognized Compensation Cost

A summary of the Partnership’s unrecognized compensation cost for its non-vested performance units, restricted units, and phantom units, and the weighted-average periods over which the compensation cost is expected to be recognized are shown in the following table.

	March 31, 2017
	Unrecognized Compensation Cost (In millions)		Weighted Average to be Recognized (In years)
Performance Units	$	21	1.78
Restricted Units	2		0.79
Phantom Units	9		2.30
Total	$	32

As of March 31, 2017, there were 8,487,330 units available for issuance under the long term incentive plan.

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Reportable Segments

3 Months Ended

Mar. 31, 2017

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 2016 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, which primarily provides natural gas and crude oil gathering and natural gas processing services to our producer customers, and (ii) transportation and storage, which provides interstate and intrastate natural gas pipeline transportation and storage service 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, 2017	Gathering  and Processing		Transportation and Storage(1)		Eliminations			Total
	(In millions)
Product sales	$	351	$	153	$	(118	)	$	386
Service revenue	140		141		(1		)	280
Total Revenues	491		294		(119		)	666
Cost of natural gas and natural gas liquids	286		140		(118		)	308
Operation and maintenance, General and administrative	70		45		(1		)	114
Depreciation and amortization	56		32		—			88
Taxes other than income tax	9		7		—			16
Operating income	$	70	$	70	$	—		$	140
Total assets	$	7,460	$	4,966	$	(1,265	)	$	11,161
Capital expenditures	$	51	$	10	$	—		$	61
Three Months Ended March 31, 2016	Gathering and Processing		Transportation and Storage(1)		Eliminations			Total
	(In millions)
Product sales	$	208	$	106	$	(69	)	$	245
Service revenue	125		140		(1		)	264
Total Revenues	333		246		(70		)	509
Cost of natural gas and natural gas liquids	165		99		(69		)	195
Operation and maintenance, General and administrative	75		41		(1		)	115
Depreciation and amortization	49		32		—			81
Taxes other than income tax	8		7		—			15
Operating income	$	36	$	67	$	—		$	103
Total assets as of December 31, 2016	$	7,453	$	4,963	$	(1,204	)	$	11,212
Capital expenditures	$	121	$	9	$	—		$	130

_____________________

(1) See Note 6 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, 2017 and 2016.

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Organization

Organization

Enable Midstream Partners, LP (Partnership) is a Delaware limited partnership formed on May 1, 2013 by CenterPoint Energy, OGE Energy and ArcLight. The Partnership’s assets and operations are organized into two reportable segments: (i) gathering and processing and (ii) transportation and storage. The gathering and processing segment primarily provides natural gas and crude oil gathering and natural gas processing services to our producer 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. The Partnership’s 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 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, 2017, CenterPoint Energy held approximately 54.1% of the Partnership’s common and subordinated units, or 94,151,707 common units and 139,704,916 subordinated units, and OGE Energy held approximately 25.7% of the Partnership’s common and subordinated units, or 42,832,291 common units and 68,150,514 subordinated units. Additionally, CenterPoint Energy holds 14,520,000 Series A Preferred Units. See Note 4 for further information related to the 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 (Enable GP) on an annual or continuing basis and may not remove Enable GP 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, 2017, the Partnership owned a 50% interest in SESH. See Note 6 for further discussion of SESH.

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.  

 These condensed consolidated financial statements and the related financial statement disclosures 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 and (d) acquisitions and dispositions of businesses, assets and other interests.

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.

Restricted Cash

Restricted Cash

Restricted cash consists of cash which is restricted by agreements with third parties.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts Receivable and 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 upon specific identification and estimates of future uncollectable amounts. On an ongoing basis, we evaluate our customers’ financial strength 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 at least quarterly, giving consideration to historical bad debt write-offs, the aging of receivables and specific customer circumstances that may impact their ability to pay the amounts due.

New Accounting Pronouncements

New Accounting Pronouncements

Adopted Accounting Standards

Share-Based Compensation

In March 2016, the FASB issued ASU No. 2016-09, “Compensation—Stock Compensation (Topic 718).” This standard makes several modifications to Topic 718 related to the accounting for forfeitures, employer tax withholding on share-based compensation and the financial statement presentation of excess tax benefits or deficiencies. ASU 2016-09 also clarifies the statement of cash flows presentation for certain components of share-based awards. The standard is effective for interim and annual reporting periods beginning after December 15, 2016. The Partnership adopted the amendment in the first quarter of 2017, which had no material impact on our Condensed Consolidated Financial Statements and related disclosures.

Statement of Cash Flows

In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments.” This standard is intended to reduce existing diversity in practice in how certain transactions are presented on the statement of cash flows. The standard is effective for interim and annual reporting periods beginning after December 15, 2017, although early adoption is permitted. The Partnership adopted ASU No. 2016-15 in the first quarter of 2017, which had no material impact on our Condensed Consolidated Financial Statements and related disclosures.

Accounting Standards to be Adopted in Future Periods

Revenue from Contracts with Customers

In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” which supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605).” Topic 606 is based on the core principle that revenue is recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Topic 606 also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract.

Topic 606 is effective for fiscal years beginning after December 15, 2017, and interim periods within those years, with early adoption permitted in 2017. However, we do not plan to adopt the standard early. Entities will have the option to apply the standard using a full retrospective or modified retrospective adoption method. The Partnership expects to adopt this ASU using the modified retrospective method. Our evaluation of the impact on our Consolidated Financial Statements and related disclosures is ongoing and not complete. In connection with our assessment work, we formed an implementation work team, completed training on the Topic 606 revenue recognition model and are continuing our review of contracts relative to the provisions of Topic 606.

Leases

In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842).” This standard requires, among other things, that lessees recognize the following for all leases (with the exception of short-term leases) at the commencement date: (1) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. Lessees and lessors must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The Partnership expects to adopt this standard by the first quarter of 2019 and is currently evaluating the impact of this standard on our Condensed Consolidated Financial Statements and related disclosures. In connection with our assessment work, we formed an implementation work team and are continuing our review of our contracts relative to the provisions of the lease standard.

Financial Instruments—Credit Losses

In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” This standard requires entities to measure all expected credit losses of financial assets held at a reporting date based on historical experience, current conditions, and reasonable and supportable forecasts in order to record credit losses in a more timely matter. ASU 2016-13 also amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The standard is effective for interim and annual reporting periods beginning after December 15, 2019, although early adoption is permitted for interim and annual periods beginning after December 15, 2018. The Partnership does not expect the adoption of this standard to have a material impact on our Condensed Consolidated Financial Statements and related disclosures.

Income Taxes

In October 2016, the FASB issued ASU No. 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory.” This standard requires entities to recognize the tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. The standard is effective for interim and annual reporting periods beginning after December 15, 2017, although early adoption is permitted as of the beginning of an annual period (i.e., only in the first interim period). The guidance requires application using a modified retrospective approach. The Partnership does not expect the adoption of this standard to have a material impact on our Condensed Consolidated Financial Statements and related disclosures.

Assessing Impairment of Long-lived Assets (including Intangible Assets)

Assessing 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. The Partnership recorded no impairments to long-lived assets in the three months ended March 31, 2017 or 2016. Based upon review of forecasted undiscounted cash flows, none of the asset groups were at risk of failing step one of the impairment test. Commodity price declines, throughput declines, cost increases, regulatory or political environment changes, and other changes in market conditions could reduce forecast undiscounted cash flows.

Fair Value Measurements

Quantitative Information on Level 3 Fair Value Measurements

The Partnership utilizes the market approach to measure the fair value of our commodity contracts. The significant unobservable inputs used in this approach to fair value are longer dated price quotes. Our sensitivity to these longer dated forward curve prices are presented in the table below. Significant changes in any of those inputs in isolation would result in significantly different fair value measurements, depending on our short or long position in contracts.

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. Hierarchical levels, as defined below and directly related to the amount of subjectivity associated with the inputs to fair valuations of these assets and liabilities are as follows:

Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities at the measurement date. Instruments classified as Level 1 include natural gas futures, swaps and options transactions for contracts traded on the NYMEX and settled through a NYMEX clearing broker.

Level 2: Inputs, other than quoted prices included in Level 1, are observable for the asset or liability, either directly or indirectly. Level 2 inputs include quoted prices for similar instruments in active markets, and inputs other than quoted prices that are observable for the asset or liability. Fair value assets and liabilities that are generally included in this category are derivatives with fair values based on inputs from actively quoted markets. Instruments classified as Level 2 include over-the-counter NYMEX natural gas swaps, natural gas basis swaps and natural gas purchase and sales transactions in markets such that the pricing is closely related to the NYMEX pricing, and over-the-counter WTI crude oil swaps for condensate sales.

Level 3: Inputs are unobservable for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. Unobservable inputs reflect the Partnership’s judgments about the assumptions market participants would use in pricing the asset or liability since limited market data exists. The Partnership develops these inputs based on the best information available, including the Partnership’s own data.

The Partnership utilizes the market approach in determining the fair value of its derivative positions by using either NYMEX or WTI published market prices, independent broker pricing data or broker/dealer valuations. The valuations of derivatives with pricing based on NYMEX published market prices may be considered Level 1 if they are settled through a NYMEX clearing broker account with daily margining. Over-the-counter derivatives with NYMEX or WTI based prices are considered Level 2 due to the impact of counterparty credit risk. Valuations based on independent broker pricing or broker/dealer valuations may be classified as Level 2 only to the extent they may be validated by an additional source of independent market data for an identical or closely related active market. In certain less liquid markets or for longer-term contracts, forward prices are not as readily available. In these circumstances, contracts are valued using internally developed methodologies that consider historical relationships among various quoted prices in active markets that result in management’s best estimate of fair value. These contracts are classified as Level 3.

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 period ended March 31, 2017, there were no transfers between levels.

The impact to the fair value of derivatives due to credit risk is calculated using the probability of default based on Standard & Poor’s Ratings Services and/or internally generated ratings. The fair value of derivative assets is adjusted for credit risk. The fair value of derivative liabilities is adjusted for credit risk only if the impact is deemed material.

Contracts with Master Netting Arrangements

Contracts with Master Netting Arrangements

Fair value amounts recognized for forward, interest rate swap, option and other conditional or exchange contracts executed with the same counterparty under a master netting arrangement may be offset. The reporting entity’s choice to offset or not must be applied consistently. A master netting arrangement exists if the reporting entity has multiple contracts, whether for the same type of conditional or exchange contract or for different types of contracts, with a single counterparty that are subject to a contractual agreement that provides for the net settlement of all contracts through a single payment in a single currency in the event of default on or termination of any one contract. Offsetting the fair values recognized for forward, interest rate swap, option and other conditional or exchange contracts outstanding with a single counterparty results in the net fair value of the transactions being reported as an asset or a liability in the Condensed Consolidated Balance Sheets. The Partnership has presented the fair values of its derivative contracts under master netting agreements using a net fair value presentation.

Derivatives Instruments and Hedging Activities

The Partnership is exposed to certain risks relating to its ongoing business operations. The primary risk managed using derivative instruments is commodity price risk. The Partnership is also exposed to credit risk in its business operations.

Commodity Price Risk

The Partnership has used forward physical contracts, commodity price swap contracts and commodity price option features to manage the Partnership’s commodity price risk exposures in the past. Commodity derivative instruments used by the Partnership are as follows:

• NGL put options, NGL futures and swaps, and WTI crude oil futures and swaps for condensate sales are used to manage the Partnership’s NGL and condensate exposure associated with its processing agreements;

• natural gas futures and swaps are used to manage the Partnership’s natural gas exposure associated with its gathering, processing and transportation and storage assets; and

• natural gas futures and swaps, natural gas options and natural gas commodity purchases and sales are used to manage the Partnership’s natural gas exposure associated with its storage and transportation contracts and asset management activities.

Normal purchases and normal sales contracts are not recorded in Other Assets or Liabilities in the Condensed Consolidated Balance Sheets and earnings are recognized and recorded in the period in which physical delivery of the commodity occurs. Management applies normal purchases and normal sales treatment to: (i) commodity contracts for the purchase and sale of natural gas used in or produced by the Partnership’s operations and (ii) commodity contracts for the purchase and sale of NGLs produced by the Partnership’s gathering and processing business.

The Partnership recognizes its non-exchange traded derivative instruments as Other Assets or Liabilities in the Condensed Consolidated Balance Sheets at fair value with such amounts classified as current or long-term based on their anticipated settlement. Exchange traded transactions are settled on a net basis daily through margin accounts with a clearing broker and, therefore, are recorded at fair value on a net basis in Other Current Assets in the Condensed Consolidated Balance Sheets.

As of March 31, 2017 and December 31, 2016, the Partnership had no derivative instruments that were designated as cash flow or fair value hedges for accounting purposes.

Credit Risk

The Partnership is exposed to certain credit risks relating to its ongoing business operations. Credit risk includes the risk that counterparties that owe the Partnership money or energy will breach their obligations. If the counterparties to these arrangements fail to perform, the Partnership may seek or be forced to enter into alternative arrangements. In that event, the Partnership’s financial results could be adversely affected, and the Partnership could incur losses.

Derivatives Not Designated As Hedging Instruments

Derivative instruments not designated as hedging instruments for accounting purposes are utilized in the Partnership’s asset management activities. 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

The majority of natural gas physical purchases and sales not designated as hedges for accounting purposes are priced based on a monthly or daily index, and the fair value is subject to little or no market price risk. Natural gas physical sales volumes exceed natural gas physical purchase volumes due to the marketing of natural gas volumes purchased via the Partnership’s processing contracts, which are not derivative instruments.

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 2016 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, which primarily provides natural gas and crude oil gathering and natural gas processing services to our producer customers, and (ii) transportation and storage, which provides interstate and intrastate natural gas pipeline transportation and storage service primarily to our producer, power plant, LDC and industrial end-user customers.

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Earnings Per Limited Partner Unit (Tables)

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Schedule Of Earnings Per Unit For Common And Subordinated Limited Partner Units

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

	Three Months Ended   March 31,
	2017		2016
	(In millions, except per unit data)
Net income	$	120	$	86
Net income attributable to noncontrolling interest	—		—
Series A Preferred Unit distribution	9		—
General partner interest in net income	—		—
Net income available to common and subordinated unitholders	$	111	$	86
Net income allocable to common units	$	58	$	44
Net income allocable to subordinated units	53		42
Net income available to common and subordinated unitholders	$	111	$	86
Net income allocable to common units	$	58	$	44
Dilutive effect of Series A Preferred Unit distributions	—		—
Diluted net income allocable to common units	58		44
Diluted net income allocable to subordinated units	53		42
Total	$	111	$	86
Basic weighted average number of outstanding
Common units(1)	225		214
Subordinated units	208		208
Total	433		422
Basic earnings per unit
Common units	$	0.26	$	0.21
Subordinated units	$	0.25	$	0.20
Basic weighted average number of outstanding common units	225		214
Dilutive effect of Series A Preferred Units	—		21
Dilutive effect of performance units	1		—
Diluted weighted average number of outstanding common units	226		235
Diluted weighted average number of outstanding subordinated units	208		208
Total	434		443
Diluted earnings per unit
Common units	$	0.26	$	0.19
Subordinated units	$	0.25	$	0.20

____________________

(1) Basic weighted average number of outstanding common units for the three months ended March 31, 2017 includes approximately one million time-based phantom units.

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Partners' Equity (Tables)

3 Months Ended

Mar. 31, 2017

Equity [Abstract]

Schedule Of Equity Transactions With Limited Partner

The Partnership paid or has authorized payment of the following cash distributions to common and subordinated unitholders during 2016 and 2017 (in millions, except for per unit amounts):

Quarter Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2017(1)	May 23, 2017	May 30, 2017	$	0.318	$	137
December 31, 2016	February 21, 2017	February 28, 2017	$	0.318	$	137
September 30, 2016	November 14, 2016	November 22, 2016	$	0.318	$	134
June 30, 2016	August 16, 2016	August 23, 2016	$	0.318	$	134
March 31, 2016	May 6, 2016	May 13, 2016	$	0.318	$	134
December 31, 2015	February 2, 2016	February 12, 2016	$	0.318	$	134

_____________________

(1) The board of directors of Enable GP declared this $0.318 per common unit cash distribution on May 2, 2017, to be paid on May 30, 2017, to common and subordinated unitholders of record at the close of business on May 23, 2017.

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 2016 and 2017 (in millions, except for per unit amounts):

Quarter Ended	Record Date	Payment Date	Per Unit Distribution		Total Cash Distribution
March 31, 2017(1)	May 2, 2017	May 12, 2017	$	0.625	$	9
December 31, 2016	February 10, 2017	February 15, 2017	$	0.625	$	9
September 30, 2016	November 1, 2016	November 14, 2016	$	0.625	$	9
June 30, 2016	August 2, 2016	August 12, 2016	$	0.625	$	9
March 31, 2016 (2)	May 6, 2016	May 13, 2016	$	0.2917	$	4

_____________________

(1) The board of directors of Enable GP declared a $0.625 per Series A Preferred Unit cash distribution on May 2, 2017, to be paid on May 12, 2017, to Series A Preferred unitholders of record at the close of business on May 2, 2017.

(2) The prorated quarterly distribution for the Series A Preferred Units is for a partial period beginning on February 18, 2016, and ending on March 31, 2016, which equates to $0.625 per unit on a full-quarter basis or $2.50 per unit on an annualized basis

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Investment in Equity Method Affiliate (Tables)

3 Months Ended

Mar. 31, 2017

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Investments Detail

Equity in Earnings of Equity Method Affiliate:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
SESH	$	7	$	7

Distributions from Equity Method Affiliate:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
SESH (1)	$	11	$	20

____________________

(1) Distributions from equity method affiliate includes a $7 million and $7 million return on investment and a $4 million and $13 million return of investment for the three months ended March 31, 2017 and 2016, respectively.

Summarized financial information of SESH:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Income Statements:
Revenues	$	28	$	29
Operating income	$	17	$	19
Net income	$	13	$	14

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Debt (Tables)

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Schedule of Debt

The following table presents the Partnership’s outstanding debt as of March 31, 2017 and December 31, 2016.

	March 31, 2017							December 31, 2016
	Outstanding Principal		Premium (Discount)			Total Debt		Outstanding Principal		Premium (Discount)			Total Debt
	(In millions)
Revolving Credit Facility	$	—	$	—		$	—	$	636	$	—		$	636
2015 Term Loan Agreement	450		—			450		450		—			450
2019 Notes	500		—			500		500		—			500
2024 Notes	600		(1		)	599		600		(1		)	599
2027 Notes	700		(3		)	697		—		—			—
2044 Notes	550		—			550		550		—			550
EOIT Senior Notes	250		17			267		250		18			268
Total debt	$	3,050	$	13		$	3,063	$	2,986	$	17		$	3,003
Less: Unamortized debt expense (1)						16							10
Total long-term debt						$	3,047						$	2,993

____________________

(1) As of March 31, 2017 and December 31, 2016, there was an additional $4 million and $5 million, respectively, of unamortized debt expense related to the Revolving Credit Facility included in Other long-term assets, not included above.

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Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments

As of March 31, 2017 and December 31, 2016, the Partnership had the following derivative instruments that were not designated as hedging instruments for accounting purposes:

	March 31, 2017		December 31, 2016
	Gross Notional Volume
	Purchases	Sales	Purchases	Sales
Natural gas—TBtu(1)
Financial fixed futures/swaps	5	24	2	29
Financial basis futures/swaps	5	25	2	30
Physical purchases/sales	1	45	1	25
Crude oil (for condensate)—MBbl(2)
Financial Futures/swaps	—	390	—	540
Natural gas liquids—MBbl(3)
Financial Futures/swaps	—	1,563	60	1,133

____________________

(1) As of March 31, 2017, 95.9% of the natural gas contracts had durations of one year or less and 4.1% had durations of more than one year and less than two years. As of December 31, 2016, 100.0% of the natural gas contracts had durations of one year or less.

(2) As of March 31, 2017 and December 31, 2016, 100% of the crude oil (for condensate) contracts had durations of one year or less.

(3) As of March 31, 2017, 51.1% of the natural gas liquids contracts had durations of one year or less and 48.9% had durations of more than one year and less than two years. As of December 31, 2016, 100% of the natural gas liquid contracts had durations of one year or less.

Schedule of Derivative Assets at Fair Value

The fair value of the derivative instruments that are presented in the Partnership’s Condensed Consolidated Balance Sheets as of March 31, 2017 and December 31, 2016 that were not designated as hedging instruments for accounting purposes are as follows:

		March 31, 2017				December 31, 2016
		Fair Value
Instrument	Balance Sheet Location	Assets		Liabilities		Assets		Liabilities
		(In millions)
Natural gas
Financial futures/swaps	Other Current/Other	$	2	$	8	$	2	$	22
Physical purchases/sales	Other Current/Other	1		—		—		1
Crude oil (for condensate)
Financial futures/swaps	Other Current/Other	1		1		—		3
Natural gas liquids
Financial Futures/swaps	Other Current/Other	—		3		—		8
Total gross derivatives (1)		$	4	$	12	$	2	$	34

_____________________

(1) See Note 9 for a reconciliation of the Partnership’s total derivatives fair value to the Partnership’s Condensed Consolidated Balance Sheets as of March 31, 2017 and December 31, 2016.

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 for the three months ended March 31, 2017 and 2016:

	Amounts Recognized in Income
	Three Months Ended   March 31,
	2017		2016
	(In millions)
Natural gas
Financial futures/swaps gains (losses)	$	11	$	10
Physical purchases/sales gains (losses)	5		(4		)
Crude oil (for condensate)
Financial futures/swaps gains (losses)	3		1
Natural gas liquids
Financial futures/swaps gains (losses)	2		(4		)
Total	$	21	$	3

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 for the three months ended March 31, 2017 and 2016:

	Three Months Ended   March 31,
	2017			2016
	(In millions)
Change in fair value of derivatives	$	24		$	(8	)
Realized gain (loss) on derivatives	(3		)	11
Gain on derivative activity	$	21		$	3

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2017

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 as of March 31, 2017 and December 31, 2016.

	March 31, 2017				December 31, 2016
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(In millions)
Long-Term Debt
Revolving Credit Facility (Level 2)	$	—	$	—	$	636	$	636
2015 Term Loan Agreement (Level 2)	450		450		450		450
2019 Notes (Level 2)	500		495		500		490
2024 Notes (Level 2)	599		584		599		564
2027 Notes (Level 2)	697		695		—		—
2044 Notes (Level 2)	550		503		550		467
EOIT Senior Notes (Level 2)	267		268		268		260

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

The following tables summarize the Partnership’s assets and liabilities that are measured at fair value on a recurring basis as of March 31, 2017 and December 31, 2016:

March 31, 2017	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	$	7	$	—	$	—
Significant other observable inputs (Level 2)	2		2		23		9
Unobservable inputs (Level 3)	—		3		—		—
Total fair value	4		12		23		9
Netting adjustments	—		—		—		—
Total	$	4	$	12	$	23	$	9

December 31, 2016	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	$	22	$	—	$	—
Significant other observable inputs (Level 2)	—		4		41		30
Unobservable inputs (Level 3)	—		8		—		—
Total fair value	2		34		41		30
Netting adjustments	—		—		—		—
Total	$	2	$	34	$	41	$	30

______________________

(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. Gas imbalances held by EOIT are valued using an average of the Inside FERC Gas Market Report for Panhandle Eastern Pipe Line Co. (Texas, Oklahoma Mainline), ONEOK (Oklahoma) and ANR Pipeline (Oklahoma) indices. There were no netting adjustments as of March 31, 2017 and December 31, 2016.

(2) Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $1 million and zero at March 31, 2017 and December 31, 2016, 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 $9 million and $5 million at March 31, 2017 and December 31, 2016, 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.

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation

The following table provides a reconciliation of changes in the fair value of our Level 3 commodity contracts between the periods presented.

	Commodity Contracts
	Natural gas liquids  financial futures/swaps
	(In millions)
Balance as of December 31, 2016	$	(8	)
Gains included in earnings	2
Settlements	3
Balance as of March 31, 2017	$	(3	)

Fair Value Inputs, Quantitative Information

The Partnership utilizes the market approach to measure the fair value of our commodity contracts. The significant unobservable inputs used in this approach to fair value are longer dated price quotes. Our sensitivity to these longer dated forward curve prices are presented in the table below. Significant changes in any of those inputs in isolation would result in significantly different fair value measurements, depending on our short or long position in contracts.

	March 31, 2017
Product Group	Fair Value			Forward Curve Range
	(In millions)			(Per gallon)
Natural gas liquids	$	(3	)	$0.285 - $0.855

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Supplemental Disclosure of Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2017

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,
	2017		2016
	(In millions)
Supplemental Disclosure of Cash Flow Information:
Cash Payments:
Interest, net of capitalized interest	$	14	$	15
Income taxes, net of refunds	—		1
Non-cash transactions:
Accounts payable related to capital expenditures	20		42

Schedule of Restricted Cash and Cash Equivalents

The following table reconciles cash and cash equivalents and restricted cash on the Condensed Consolidated Balance Sheets to cash, cash equivalents and restricted cash on the Condensed Consolidated Statement of Cash Flows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Cash and cash equivalents	$	17	$	38
Restricted cash	14		—
Cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statements of Cash Flows	$	31	$	38

Schedule of Cash and Cash Equivalents

The following table reconciles cash and cash equivalents and restricted cash on the Condensed Consolidated Balance Sheets to cash, cash equivalents and restricted cash on the Condensed Consolidated Statement of Cash Flows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Cash and cash equivalents	$	17	$	38
Restricted cash	14		—
Cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statements of Cash Flows	$	31	$	38

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Related Party Transactions (Tables)

3 Months Ended

Mar. 31, 2017

Related Party Transactions [Abstract]

Schedule of Revenues from Related Parties

Amounts of revenues from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income are summarized as follows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Gas transportation and storage service revenue — CenterPoint Energy	$	33	$	33
Natural gas product sales — CenterPoint Energy	—		1
Gas transportation and storage service revenue — OGE Energy	9		9
Natural gas product sales — OGE Energy	—		1
Total revenues — affiliated companies	$	42	$	44

Schedule of Natural Gas Purchased From Related Parties

Amounts of natural gas purchased from affiliated companies included in the Partnership’s Condensed Consolidated Statements of Income are summarized as follows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Cost of natural gas purchases — CenterPoint Energy	$	—	$	—
Cost of natural gas purchases — OGE Energy	3		2
Total cost of natural gas purchases — affiliated companies	$	3	$	2

Schedule of Amounts Charged to Partnership by Related Parties

Amounts charged to the Partnership by affiliates for seconded employees and corporate services, included primarily in Operation and maintenance and General and administrative expenses in the Partnership’s Condensed Consolidated Statements of Income are as follows:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Corporate Services — CenterPoint Energy	$	1	$	2
Seconded Employee Costs — OGE Energy	7		9
Corporate Services — OGE Energy	1		2
Total corporate services and seconded employees expense	$	9	$	13

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Equity Based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

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

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

The following table summarizes the Partnership’s compensation expense for the three months ended March 31, 2017 and 2016 related to performance units, restricted units, and phantom units for the Partnership’s employees and independent directors:

	Three Months Ended   March 31,
	2017		2016
	(In millions)
Performance units	$	3	$	1
Restricted units	—		1
Phantom units	1		—
Total compensation expense	$	4	$	2

Schedule of Share-based Compensation, Activity

A summary of the activity for the Partnership’s performance units, restricted units, and phantom units applicable to the Partnership’s employees at March 31, 2017 and changes during 2017 are shown in the following table.

	Performance Units					Restricted Units					Phantom Units
	Number of Units (1)			Weighted Average Grant-Date Fair Value, Per Unit		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, 2016	1,969,107			$	15.27	392,995			$	20.74	643,604			$	8.49
Granted	468,626			19.27		—			—		376,385			16.26
Vested	—			—		—			—		—			—
Forfeited	(18,217		)	15.20		(3,194		)	21.54		(3,580		)	8.12
Units Outstanding at March 31, 2017	2,419,516			$	16.05	389,801			$	20.74	1,016,409			$	11.37
Aggregate Intrinsic Value of Units Outstanding at March 31, 2017	$	40				$	7				$	17

_____________________

(1) Performance units outstanding as of March 31, 2017 include 336,322 units from the annual grant, which were approved by the Board of Directors in 2014. The results of the performance units were certified by the Compensation Committee in February 2017, at a 91.5% payout based on the level of achievement of a performance goal established by the Board of Directors over a performance period of April 11, 2014 through December 31, 2016. Additional information related to the performance goal is described in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2014. The reduction in outstanding units for a payout percentage of an amount other than 100% is not reflected above until the vesting date.

Schedule of Unrecognized Compensation Cost, Nonvested Awards

A summary of the Partnership’s unrecognized compensation cost for its non-vested performance units, restricted units, and phantom units, and the weighted-average periods over which the compensation cost is expected to be recognized are shown in the following table.

	March 31, 2017
	Unrecognized Compensation Cost (In millions)		Weighted Average to be Recognized (In years)
Performance Units	$	21	1.78
Restricted Units	2		0.79
Phantom Units	9		2.30
Total	$	32

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Reportable Segments (Tables)

3 Months Ended

Mar. 31, 2017

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, 2017	Gathering  and Processing		Transportation and Storage(1)		Eliminations			Total
	(In millions)
Product sales	$	351	$	153	$	(118	)	$	386
Service revenue	140		141		(1		)	280
Total Revenues	491		294		(119		)	666
Cost of natural gas and natural gas liquids	286		140		(118		)	308
Operation and maintenance, General and administrative	70		45		(1		)	114
Depreciation and amortization	56		32		—			88
Taxes other than income tax	9		7		—			16
Operating income	$	70	$	70	$	—		$	140
Total assets	$	7,460	$	4,966	$	(1,265	)	$	11,161
Capital expenditures	$	51	$	10	$	—		$	61
Three Months Ended March 31, 2016	Gathering and Processing		Transportation and Storage(1)		Eliminations			Total
	(In millions)
Product sales	$	208	$	106	$	(69	)	$	245
Service revenue	125		140		(1		)	264
Total Revenues	333		246		(70		)	509
Cost of natural gas and natural gas liquids	165		99		(69		)	195
Operation and maintenance, General and administrative	75		41		(1		)	115
Depreciation and amortization	49		32		—			81
Taxes other than income tax	8		7		—			15
Operating income	$	36	$	67	$	—		$	103
Total assets as of December 31, 2016	$	7,453	$	4,963	$	(1,204	)	$	11,212
Capital expenditures	$	121	$	9	$	—		$	130

_____________________

(1) See Note 6 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, 2017 and 2016.

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Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) board_member segment shares	Dec. 31, 2016 USD ($)	Mar. 31, 2016 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%
Restricted cash | $	$ 14	$ 17	$ 0
Allowance for doubtful accounts | $	$ 4	$ 3
SESH
Significant Accounting Policies [Line Items]
Ownership percentage	50.00%
Limited Partner | CenterPoint
Significant Accounting Policies [Line Items]
Percentage share of management rights	50.00%
Percentage share of incentive distribution rights	40.00%
Limited partner ownership interest percentage	54.10%
Limited Partner | CenterPoint | 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	14,520,000
Limited Partner | CenterPoint | Common Units
Significant Accounting Policies [Line Items]
Units outstanding	94,151,707
Limited Partner | CenterPoint | Subordinated Units
Significant Accounting Policies [Line Items]
Units outstanding	139,704,916
Limited Partner | OGE Energy
Significant Accounting Policies [Line Items]
Percentage share of management rights	50.00%
Percentage share of incentive distribution rights	60.00%
Limited partner ownership interest percentage	25.70%
Limited Partner | OGE Energy | Common Units
Significant Accounting Policies [Line Items]
Units outstanding	42,832,291
Limited Partner | OGE Energy | Subordinated Units
Significant Accounting Policies [Line Items]
Units outstanding	68,150,514

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Earnings Per Limited Partner Unit (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income		$ 120	$ 86
Net income attributable to noncontrolling interest		0	0
Series A Preferred Unit distribution		9	0
General partner interest in net income		0	0
Net Income Attributable to Common and Subordinated Units (Note 3)		111	86
Dilutive effect of Series A Preferred Unit distributions		0	0
Diluted net income		$ 111	$ 86
Basic weighted average number of outstanding
Basic weighted average number of outstanding		433	422
Basic earnings per unit
Dilutive effect of Series A Preferred Units (in units)		0	21
Dilutive effect of performance units (in units)		1	0
Diluted weighted average number of outstanding units		434	443
Phantom units
Basic weighted average number of outstanding
Basic weighted average number of outstanding	[1]	1
Performance Units, Restricted Units, and Phantom Units
Basic earnings per unit
Dilutive effect of unit-based awards (in dollars per unit) (less than $.01)		$ 0.01	$ 0.01
Common Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income Attributable to Common and Subordinated Units (Note 3)		$ 58	$ 44
Diluted net income		$ 58	$ 44
Basic weighted average number of outstanding
Basic weighted average number of outstanding	[1]	225	214
Basic earnings per unit
Basic earnings per unit		$ 0.26	$ 0.21
Diluted weighted average number of outstanding units		226	235
Diluted earnings per unit		$ 0.26	$ 0.19
Subordinated Units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net Income Attributable to Common and Subordinated Units (Note 3)		$ 53	$ 42
Diluted net income		$ 53	$ 42
Basic weighted average number of outstanding
Basic weighted average number of outstanding		208	208
Basic earnings per unit
Basic earnings per unit		$ 0.25	$ 0.20
Diluted weighted average number of outstanding units		208	208
Diluted earnings per unit		$ 0.25	$ 0.20

[1] Basic weighted average number of outstanding common units for the three months ended March 31, 2017 includes approximately one million time-based phantom units.

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Partners' Equity -Schedule of Cash Distributions (Details) - USD ($)		May 30, 2017	May 23, 2017	May 12, 2017	May 02, 2017	Feb. 28, 2017	Feb. 21, 2017	Feb. 15, 2017	Feb. 10, 2017	Nov. 22, 2016	Nov. 14, 2016	Nov. 01, 2016	Aug. 23, 2016	Aug. 16, 2016	Aug. 12, 2016	Aug. 02, 2016	May 13, 2016		May 06, 2016		Feb. 12, 2016	Feb. 02, 2016
Distribution Made to Limited Partner [Line Items]
Record Date							Feb. 21, 2017				Nov. 14, 2016			Aug. 16, 2016					May 06, 2016			Feb. 02, 2016
Payment Date						Feb. 28, 2017				Nov. 22, 2016			Aug. 23, 2016				May 13, 2016				Feb. 12, 2016
Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units | Preferred Units
Distribution Made to Limited Partner [Line Items]
Record Date									Feb. 10, 2017			Nov. 01, 2016				Aug. 02, 2016			May 06, 2016	[1]
Payment Date								Feb. 15, 2017			Nov. 14, 2016				Aug. 12, 2016		May 13, 2016	[1]
Cash Distribution
Distribution Made to Limited Partner [Line Items]
Per unit distribution, paid (in dollars per unit)						$ 0.31800				$ 0.31800			$ 0.31800				$ 0.31800				$ 0.318
Distribution made to unitholders						$ 137,000,000				$ 134,000,000			$ 134,000,000				$ 134,000,000				$ 134,000,000
Cash Distribution | Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units | Preferred Units
Distribution Made to Limited Partner [Line Items]
Per unit distribution, paid (in dollars per unit)								$ 0.62500			$ 0.625				$ 0.625		$ 0.2917	[1]
Distribution made to unitholders								$ 9,000,000			$ 9,000,000				$ 9,000,000		$ 4,000,000	[1]
Full quarter equivalent distribution declared (in dollars per unit)																	$ 0.625
Annualized distribution declared (in dollars per unit)																	$ 2.50
Subsequent Event | Cash Distribution
Distribution Made to Limited Partner [Line Items]
Cash distribution declared (in dollars per unit)					$ 0.318
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)					$ 0.625000000
Subsequent Event | Scenario, Forecast
Distribution Made to Limited Partner [Line Items]
Record Date	[2]		May 23, 2017
Payment Date	[2]	May 30, 2017
Subsequent Event | Scenario, Forecast | Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units | Preferred Units
Distribution Made to Limited Partner [Line Items]
Record Date	[3]				May 02, 2017
Payment Date	[3]			May 12, 2017
Subsequent Event | Scenario, Forecast | Cash Distribution
Distribution Made to Limited Partner [Line Items]
Per unit distribution, paid (in dollars per unit)	[2]	$ 0.318
Distribution made to unitholders	[2]	$ 137,000,000
Subsequent Event | Scenario, Forecast | Cash Distribution | Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units | Preferred Units
Distribution Made to Limited Partner [Line Items]
Per unit distribution, paid (in dollars per unit)	[3]			$ 0.62500
Distribution made to unitholders	[3]			$ 9,000,000

[1] The prorated quarterly distribution for the Series A Preferred Units is for a partial period beginning on February 18, 2016, and ending on March 31, 2016, which equates to $0.625 per unit on a full-quarter basis or $2.50 per unit on an annualized basis.

[2] The board of directors of Enable GP declared this $0.318 per common unit cash distribution on May 2, 2017, to be paid on May 30, 2017, to common and subordinated unitholders of record at the close of business on May 23, 2017.

[3] The board of directors of Enable GP declared a $0.625 per Series A Preferred Unit cash distribution on May 2, 2017, to be paid on May 12, 2017, to Series A Preferred unitholders of record at the close of business on May 2, 2017.

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Partners' Equity Textual (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended
	Nov. 29, 2016	Feb. 18, 2016	Mar. 31, 2017	Mar. 31, 2016
Distribution Made to Limited Partner [Line Items]
Limited partners' capital account, required quarterly distribution period			60 days
Limited partners capital account, minimum quarterly distribution, annualized			150.00%
Proceeds from issuance of Series A Preferred Units, net of issuance costs			$ 0	$ 362
Repayment of notes payable—affiliated companies			$ 0	$ 363
Number of common units included in public offering	75,719
CenterPoint | Limited Partner
Distribution Made to Limited Partner [Line Items]
Repayment of notes payable—affiliated companies		$ 363
Public Offering
Distribution Made to Limited Partner [Line Items]
Number of common units included in public offering	10,000,000
Price per common unit	$ 14.00
Proceeds received from the offering	$ 137
Over-Allotment Option
Distribution Made to Limited Partner [Line Items]
Number of common units included in public offering	1,500,000
Over-Allotment Option | Affiliate of ArcLight Capital Partners, LLC
Distribution Made to Limited Partner [Line Items]
Number of common units included in public offering	1,424,281
Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units
Distribution Made to Limited Partner [Line Items]
Annual distribution percentage rate		10.00%
Liquidation preference (in dollars per unit)		$ 25.00
Period after date of original issue		5 years
Redemption price (in dollars per unit)		$ 25.50
Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units | LIBOR
Distribution Made to Limited Partner [Line Items]
Annual distribution percentage rate		8.50%
Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units | Private Placement
Distribution Made to Limited Partner [Line Items]
Issuance of Series A Preferred Units, units		14,520,000
Cash purchase price (in dollars per unit)		$ 25.00
Proceeds from issuance of Series A Preferred Units, net of issuance costs		$ 362
Expenses related to the offering		$ 1
Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units | Private Placement | CenterPoint | Limited Partner
Distribution Made to Limited Partner [Line Items]
Issuance of Series A Preferred Units, units		14,520,000
Cash purchase price (in dollars per unit)		$ 25.00
Proceeds from issuance of Series A Preferred Units, net of issuance costs		$ 362
Distribution Subordination Period 1
Distribution Made to Limited Partner [Line Items]
Limited partners' capital account, minimum annualized quarterly distribution (in dollars per unit)			$ 1.15
Distribution Subordination Period 2
Distribution Made to Limited Partner [Line Items]
Limited partners' capital account, maximum annualized quarterly distribution (in dollars per unit)			$ 1.725
Maximum
Distribution Made to Limited Partner [Line Items]
Limited partners' capital account, incentive distribution rights, percentage			50.00%
Minimum
Distribution Made to Limited Partner [Line Items]
Incentive distribution, distribution (in dollars per unit)			$ 0.330625

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Assessing Impairment of Long-lived Assets (including Intangible Assets) - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Impairments to long-lived assets	$ 0	$ 0

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Investment in Equity Method Affiliate - Narrative (Details) - SESH - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%
Percentage of distributions through limited partner interest	50.00%
Equity Method Investee | Shared Operations Service Agreements
Schedule of Equity Method Investments [Line Items]
Amount billed associated with service agreements	$ 5	$ 4

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Investment in Equity Method Affiliate - Schedule of Investments (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Equity in Earnings of Equity Method Affiliates:
Equity in earnings of equity method affiliate		$ 7	$ 7
Distributions from Equity Method Affiliates:
Return on investment in equity method affiliate		7	7
Return of investment in equity method affiliate		4	13
SESH
Equity in Earnings of Equity Method Affiliates:
Equity in earnings of equity method affiliate		7	7
Distributions from Equity Method Affiliates:
Distributions from equity method affiliate	[1]	11	20
Return on investment in equity method affiliate		7	7
Return of investment in equity method affiliate		4	13
Revenues		28	29
Operating income		17	19
Net income		$ 13	$ 14

[1] Distributions from equity method affiliate includes a $7 million and $7 million return on investment and a $4 million and $13 million return of investment for the three months ended March 31, 2017 and 2016, respectively.

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Debt - Schedule of Outstanding Debt (Details) - USD ($) $ in Millions		Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Outstanding Principal		$ 3,050	$ 2,986
Premium (Discount)		13	17
Total Debt		3,063	3,003
Less: Unamortized debt expense	[1]	16	10
Total long-term debt		3,047	2,993
2015 Term Loan Agreement | 2015 Term Loan Agreement
Debt Instrument [Line Items]
Outstanding Principal		450	450
Premium (Discount)		0	0
Total Debt		450	450
Senior Notes | 2019 Notes
Debt Instrument [Line Items]
Outstanding Principal		500	500
Premium (Discount)		0	0
Total Debt		500	500
Senior Notes | 2024 Notes
Debt Instrument [Line Items]
Outstanding Principal		600	600
Premium (Discount)		(1)	(1)
Total Debt		599	599
Senior Notes | 2027 Notes
Debt Instrument [Line Items]
Outstanding Principal		700	0
Premium (Discount)		(3)	0
Total Debt		697	0
Less: Unamortized debt expense		6
Senior Notes | 2044 Notes
Debt Instrument [Line Items]
Outstanding Principal		550	550
Premium (Discount)		0	0
Total Debt		550	550
Senior Notes | EOIT Senior Notes | EOIT
Debt Instrument [Line Items]
Outstanding Principal		250	250
Premium (Discount)		17	18
Total Debt		267	268
Revolving Credit Facility
Debt Instrument [Line Items]
Outstanding Principal		0	636
Premium (Discount)		0	0
Total Debt		0	636
Unamortized debt expense related to Revolving Credit Facility		$ 4	$ 5

[1] As of March 31, 2017 and December 31, 2016, there was an additional $4 million and $5 million, respectively, of unamortized debt expense related to the Revolving Credit Facility included in Other long-term assets, not included above.

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Debt - Narrative (Details)				3 Months Ended
		Mar. 09, 2017 USD ($)	Jul. 31, 2015 USD ($) time	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Commercial paper, authorized				$ 1,400,000,000
Unamortized debt expense	[1]			16,000,000	$ 10,000,000
Outstanding Principal				3,050,000,000	2,986,000,000
Term loan facility | 2015 Term Loan Agreement
Debt Instrument [Line Items]
Duration of term loan facility			3 years
Amount of loan agreement			$ 450,000,000
Number of times option maybe exercised to extend term of Term Loan Facility | time			2
Extension period			1 year
Minimum prepayment amount of option to prepay without penalty or premium (minimum amount of $1 million)			$ 1,000,000
Multiple amount of prepayment in excess of minimum prepayment			$ 500,000.0
Term loan facility				$ 450,000,000
Weighted average interest rate percentage				2.15%
Term loan facility | LIBOR | 2015 Term Loan Agreement
Debt Instrument [Line Items]
Applicable margin percentage				1.375%
Senior Notes | 2027 Notes
Debt Instrument [Line Items]
Amount of loan agreement		$ 700,000,000
Fixed interest rate percentage		4.40%
Net proceeds		$ 691,000,000
Unamortized discount				$ 3,000,000
Unamortized debt expense				6,000,000
Outstanding Principal				$ 700,000,000	0
Effective interest rate percentage				4.58%
Senior Notes | Senior Notes including 2019 Notes, 2024 Notes, and 2044 Notes
Debt Instrument [Line Items]
Unamortized discount				$ 1,000,000
Unamortized debt expense				10,000,000
Senior Notes | 2019 Notes
Debt Instrument [Line Items]
Outstanding Principal				$ 500,000,000	500,000,000
Effective interest rate percentage				2.58%
Senior Notes | 2024 Notes
Debt Instrument [Line Items]
Outstanding Principal				$ 600,000,000	600,000,000
Effective interest rate percentage				4.02%
Senior Notes | 2044 Notes
Debt Instrument [Line Items]
Outstanding Principal				$ 550,000,000	550,000,000
Effective interest rate percentage				5.08%
Senior Notes | EOIT Senior Notes | EOIT
Debt Instrument [Line Items]
Fixed interest rate percentage				6.25%
Outstanding Principal				$ 250,000,000	250,000,000
Unamortized premium				$ 17,000,000
Effective interest rate percentage				3.86%
Commercial Paper
Debt Instrument [Line Items]
Commercial paper outstanding				$ 0	0
Revolving Credit Facility
Debt Instrument [Line Items]
Letters of credit principal advances				0
Letters of credit outstanding amount				3,000,000
Maximum borrowing capacity				$ 1,750,000,000
Commitment fee percentage				0.20%
Outstanding Principal				$ 0	$ 636,000,000
Revolving Credit Facility | LIBOR
Debt Instrument [Line Items]
Applicable margin percentage				1.50%

[1] As of March 31, 2017 and December 31, 2016, there was an additional $4 million and $5 million, respectively, of unamortized debt expense related to the Revolving Credit Facility included in Other long-term assets, not included above.

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Derivative Instruments and Hedging Activities (Details) - Not Designated as Hedging Instrument bbl in Thousands, MMBTU in Millions		3 Months Ended
		Mar. 31, 2017 MMBTU bbl	Mar. 31, 2016 MMBTU bbl	Dec. 31, 2016
Natural Gas, Financial fixed futures/swaps | Purchases
Derivative [Line Items]
Derivative, gross notional volume (TBtu)	[1]	5	2
Natural Gas, Financial fixed futures/swaps | Sales
Derivative [Line Items]
Derivative, gross notional volume (TBtu)	[1]	24	29
Natural gas, Financial basis futures/swaps | Purchases
Derivative [Line Items]
Derivative, gross notional volume (TBtu)	[1]	5	2
Natural gas, Financial basis futures/swaps | Sales
Derivative [Line Items]
Derivative, gross notional volume (TBtu)	[1]	25	30
Physical purchases/sales | Purchases
Derivative [Line Items]
Derivative, gross notional volume (TBtu)	[1]	1	1
Physical purchases/sales | Sales
Derivative [Line Items]
Derivative, gross notional volume (TBtu)	[1]	45	25
Crude oil, Financial Futures/swaps | Purchases
Derivative [Line Items]
Derivative, gross notional volume (MMbl) | bbl	[2]	0	0
Crude oil, Financial Futures/swaps | Sales
Derivative [Line Items]
Derivative, gross notional volume (MMbl) | bbl	[2]	390	540
Natural gas liquids, Financial Futures/swaps | Purchases
Derivative [Line Items]
Derivative, gross notional volume (MMbl) | bbl	[3]	0	60
Natural gas liquids, Financial Futures/swaps | Sales
Derivative [Line Items]
Derivative, gross notional volume (MMbl) | bbl	[3]	1,563	1,133
Natural gas
Derivative [Line Items]
Percent of contract with durations of one year or less		95.90%		100.00%
Percent of contracts with durations of more than one year and less than two years		4.10%
Condensate
Derivative [Line Items]
Percent of contract with durations of one year or less		100.00%		100.00%
Natural gas liquids
Derivative [Line Items]
Percent of contract with durations of one year or less		51.10%		100.00%
Percent of contracts with durations of more than one year and less than two years		48.90%

[1] As of March 31, 2017, 95.9% of the natural gas contracts had durations of one year or less and 4.1% had durations of more than one year and less than two years. As of December 31, 2016, 100.0% of the natural gas contracts had durations of one year or less.

[2] As of March 31, 2017 and December 31, 2016, 100% of the crude oil (for condensate) contracts had durations of one year or less.

[3] As of March 31, 2017, 51.1% of the natural gas liquids contracts had durations of one year or less and 48.9% had durations of more than one year and less than two years. As of December 31, 2016, 100% of the natural gas liquid contracts had durations of one year or less.

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Derivative Instruments and Hedging Activities - Balance Sheet Location (Details) - USD ($)		Mar. 31, 2017	Dec. 31, 2016
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative instruments designated as cash flow hedges or fair value hedges		$ 0	$ 0
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Assets	[1]	4,000,000	2,000,000
Liabilities	[1]	12,000,000	34,000,000
Natural gas | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current, Assets
Derivatives, Fair Value [Line Items]
Assets		2,000,000	2,000,000
Natural gas | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Liabilities		8,000,000	22,000,000
Natural gas | Physical purchases/sales | Not Designated as Hedging Instrument | Other Current, Assets
Derivatives, Fair Value [Line Items]
Assets		1,000,000	0
Natural gas | Physical purchases/sales | Not Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Liabilities		0	1,000,000
Crude oil (for condensate) | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current, Assets
Derivatives, Fair Value [Line Items]
Assets		1,000,000	0
Crude oil (for condensate) | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Liabilities		1,000,000	3,000,000
Natural gas liquids | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current, Assets
Derivatives, Fair Value [Line Items]
Assets		0	0
Natural gas liquids | Financial futures/swaps | Not Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Liabilities		$ 3,000,000	$ 8,000,000

[1] See Note 9 for a reconciliation of the Partnership’s total derivatives fair value to the Partnership’s Condensed Consolidated Balance Sheets as of March 31, 2017 and December 31, 2016.

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Derivative Instruments and Hedging Activities - Amounts Recognized in Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on derivative, net	$ 21	$ 3
Change in fair value of derivatives	24	(8)
Realized gain (loss) on derivatives	(3)	11
Gain on derivative activity	21	3
Cash collateral posted	1
Cash collateral required if ratings are lowered	1
Natural gas | Financial futures/swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on derivative, net	11	10
Natural gas | Physical purchases/sales
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on derivative, net	5	(4)
Condensate | Financial futures/swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on derivative, net	3	1
Natural gas liquids | Financial futures/swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on derivative, net	$ 2	$ (4)

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Fair Value Measurements - Carrying and Fair Value Amounts (Details) - Significant other observable inputs (Level 2) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Carrying Amount | 2015 Term Loan Agreement | 2015 Term Loan Agreement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
2015 Term Loan Agreement (Level 2)	$ 450	$ 450
Carrying Amount | Senior Notes | 2019 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)	500	500
Carrying Amount | Senior Notes | 2024 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)	599	599
Carrying Amount | Senior Notes | 2027 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)	697	0
Carrying Amount | Senior Notes | 2044 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)	550	550
Carrying Amount | Senior Notes | EOIT Senior Notes | EOIT
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)	267	268
Carrying Amount | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Revolving Credit Facility (Level 2)	0	636
Fair Value | 2015 Term Loan Agreement | 2015 Term Loan Agreement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
2015 Term Loan Agreement (Level 2)	450	450
Fair Value | Senior Notes | 2019 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)	495	490
Fair Value | Senior Notes | 2024 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)	584	564
Fair Value | Senior Notes | 2027 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)	695	0
Fair Value | Senior Notes | 2044 Notes
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)	503	467
Fair Value | Senior Notes | EOIT Senior Notes | EOIT
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes (Level 2)	268	260
Fair Value | Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Revolving Credit Facility (Level 2)	$ 0	$ 636

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Fair Value Measurements - Fair Value Hierarchy (Details) - USD ($) $ in Millions		Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Retained fuel due from shippers		$ 1	$ 0
Over retained fuel due from shippers		9	5
Commodity Contracts | Recurring Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, total fair value		4	2
Liabilities, total fair value		12	34
Assets		0	0
Liabilities		0	0
Assets		4	2
Liabilities		12	34
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		2	2
Liabilities		7	22
Commodity Contracts | Recurring Measurement | Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets		2	0
Liabilities		2	4
Commodity Contracts | Recurring Measurement | Unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets		0	0
Liabilities		3	8
Gas Imbalances | Recurring Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, total fair value	[1],[2]	23	41
Liabilities, total fair value	[2],[3]	9	30
Assets	[1],[2]	0	0
Liabilities	[2],[3]	0	0
Assets	[1],[2]	23	41
Liabilities	[2],[3]	9	30
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]	23	41
Liabilities	[2],[3]	9	30
Gas Imbalances | Recurring Measurement | Unobservable inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	[1],[2]	0	0
Liabilities	[2],[3]	$ 0	$ 0

[1] Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $1 million and zero at March 31, 2017 and December 31, 2016, 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. Gas imbalances held by EOIT are valued using an average of the Inside FERC Gas Market Report for Panhandle Eastern Pipe Line Co. (Texas, Oklahoma Mainline), ONEOK (Oklahoma) and ANR Pipeline (Oklahoma) indices. There were no netting adjustments as of March 31, 2017 and December 31, 2016.

[3] Gas imbalance liabilities exclude fuel reserves for over retained fuel due to shippers of $9 million and $5 million at March 31, 2017 and December 31, 2016, 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.

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Fair Value Measurements - Schedule of Changes in Fair Value of Level 3 Financial Instruments (Details) - Commodity Contracts - Natural gas liquids financial futures/swaps $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Balance as of December 31, 2016	$ (8)
Gains included in earnings	2
Settlements	3
Balance as of March 31, 2017	$ (3)

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Fair Value Measurements - Schedule of Quantitative Information of Level 3 Inputs (Details) - Commodity Contracts - Natural gas liquids - Market Approach Valuation Technique - Unobservable inputs (Level 3) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) $ / gal
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Liabilities | $	$ (3)
Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Forward Curve Range (in dollars per gallon)	0.285
Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Forward Curve Range (in dollars per gallon)	0.855

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Supplemental Disclosure of Cash Flow Information - Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Supplemental Cash Flow Information [Abstract]
Interest, net of capitalized interest	$ 14	$ 15
Income taxes, net of refunds	0	1
Accounts payable related to capital expenditures	$ 20	$ 42

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Supplemental Disclosure of Cash Flow Information - Reconciliation of Cash and Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 17	$ 6	$ 38
Restricted cash	14	17	0
Cash, cash equivalents and restricted cash shown in the Condensed Consolidated Statements of Cash Flows	$ 31	$ 23	$ 38	$ 4

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Related Party Transactions - Narrative (Details) $ / shares in Units, $ in Millions			3 Months Ended
	Dec. 06, 2016 mi	Feb. 18, 2016 USD ($) $ / shares shares	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Related Party Transaction [Line Items]
Partnership's revenues from affiliated companies as a percent of total revenues			6.00%	9.00%
Proceeds from issuance of Series A Preferred Units, net of issuance costs			$ 0	$ 362
Private Placement | Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units
Related Party Transaction [Line Items]
Issuance of Series A Preferred Units, units | shares		14,520,000
Cash purchase price (in dollars per unit) | $ / shares		$ 25.00
Proceeds from issuance of Series A Preferred Units, net of issuance costs		$ 362
Subsidiary of Common Parent | OGE Energy | Transportation Agreement between OGE Energy and Enable Oklahoma Intrastate Transmission, LLC | Pipelines
Related Party Transaction [Line Items]
Term of transportation and storage agreement	20 years
Length of pipeline (in miles) | mi	80
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
Related Party Transaction [Line Items]
Period notice of termination prior to commencement of succeeding annual period			180 days
OGE Energy | Minimum
Related Party Transaction [Line Items]
Period notice of termination prior to commencement of succeeding annual period			180 days
OGE Energy | Defined Benefit and Retiree Medical Plans
Related Party Transaction [Line Items]
Expense reimbursement, 2017			$ 5
Expense reimbursement, 2018			5
Expense reimbursement, thereafter			5
OGE Energy | Certain Services and Support Functions
Related Party Transaction [Line Items]
Expense reimbursement annual caps			4
CenterPoint
Related Party Transaction [Line Items]
Notes payable affiliated companies outstanding		$ 363
Affiliate interest expense			0	$ 1
CenterPoint | Certain Services and Support Functions
Related Party Transaction [Line Items]
Expense reimbursement annual caps			3
Affiliated Entity | CenterPoint | Lease Agreement with Affiliate of CenterPoint Energy
Related Party Transaction [Line Items]
Rent and maintenance expenses			$ 3
Limited Partner | CenterPoint | Private Placement | Series A 10% Fixed to Floating Non Cumulative Redeemable Perpetual Preferred Units
Related Party Transaction [Line Items]
Issuance of Series A Preferred Units, units | shares		14,520,000
Cash purchase price (in dollars per unit) | $ / shares		$ 25.00
Proceeds from issuance of Series A Preferred Units, net of issuance costs		$ 362

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Related Party Transactions - Related Party Activity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Related Party Transaction [Line Items]
Revenues from affiliated companies	$ 42	$ 44
Cost of goods sold from affiliate	3	2
Charges to the Partnership by affiliates	9	13
CenterPoint
Related Party Transaction [Line Items]
Cost of goods sold from affiliate	0	0
CenterPoint | Gas Transportation and Storage
Related Party Transaction [Line Items]
Revenues from affiliated companies	33	33
CenterPoint | Gas Sales
Related Party Transaction [Line Items]
Revenues from affiliated companies	0	1
CenterPoint | Corporate Services
Related Party Transaction [Line Items]
Charges to the Partnership by affiliates	1	2
OGE Energy
Related Party Transaction [Line Items]
Cost of goods sold from affiliate	3	2
OGE Energy | Gas Transportation and Storage
Related Party Transaction [Line Items]
Revenues from affiliated companies	9	9
OGE Energy | Gas Sales
Related Party Transaction [Line Items]
Revenues from affiliated companies	0	1
OGE Energy | Corporate Services
Related Party Transaction [Line Items]
Charges to the Partnership by affiliates	1	2
OGE Energy | Seconded Employee Costs
Related Party Transaction [Line Items]
Charges to the Partnership by affiliates	$ 7	$ 9

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Equity Based Compensation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 4	$ 2
Performance units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	3	1
Restricted units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	0	1
Phantom units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense	$ 1	$ 0

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Equity Based Compensation - Equity Units Activity (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended	12 Months Ended
	Jun. 02, 2017	Mar. 31, 2017	Dec. 31, 2016
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)		1,969,107
Granted (in units)		468,626
Vested (in units)		0
Forfeited (in units)		(18,217)
Units Outstanding (in units)		2,419,516	1,969,107
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)		$ 15.27
Granted (in dollars per unit)		19.27
Vested (in dollars per unit)		0.00
Forfeited (in dollars per unit)		15.20
Units Outstanding (in dollars per unit)		$ 16.05	$ 15.27
Aggregate Intrinsic Value of Units Outstanding		$ 40
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			100.00%
Performance units | Annual Grant in 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted (in units)		336,322
Performance units | Annual Grant in 2014 | Scenario, Forecast
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Payout percentage	91.50%
Restricted 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)		392,995
Granted (in units)		0
Vested (in units)		0
Forfeited (in units)		(3,194)
Units Outstanding (in units)		389,801	392,995
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)		$ 20.74
Granted (in dollars per unit)		0.00
Vested (in dollars per unit)		0.00
Forfeited (in dollars per unit)		21.54
Units Outstanding (in dollars per unit)		$ 20.74	$ 20.74
Aggregate Intrinsic Value of Units Outstanding		$ 7
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)		643,604
Granted (in units)		376,385
Vested (in units)		0
Forfeited (in units)		(3,580)
Units Outstanding (in units)		1,016,409	643,604
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)		$ 8.49
Granted (in dollars per unit)		16.26
Vested (in dollars per unit)		0.00
Forfeited (in dollars per unit)		8.12
Units Outstanding (in dollars per unit)		$ 11.37	$ 8.49
Aggregate Intrinsic Value of Units Outstanding		$ 17

XML

Equity Based Compensation - Unrecognized Compensation Cost (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost (In millions)	$ 32
Performance units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost (In millions)	$ 21
Weighted Average to be Recognized (In years)	1 year 9 months 12 days
Restricted units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost (In millions)	$ 2
Weighted Average to be Recognized (In years)	9 months 15 days
Phantom units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized Compensation Cost (In millions)	$ 9
Weighted Average to be Recognized (In years)	2 years 3 months 20 days
Long Term Incentive Plan | Common Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance | shares	8,487,330

XML

Reportable Segments - Schedule of Financial Data for Business Segments and Services (Details) $ in Millions		3 Months Ended
		Mar. 31, 2017 USD ($) segment	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment		2
Product sales		$ 386	$ 245
Service revenue		280	264
Total Revenues		666	509
Cost of goods sold, excluding depreciation and amortization		308	195
Operation and maintenance, General and administrative		114	115
Depreciation and amortization		88	81
Taxes other than income tax		16	15
Operating Income		140	103
Total assets		11,161		$ 11,212
Capital expenditures		61	130
Operating Segments | Gathering and Processing
Segment Reporting Information [Line Items]
Product sales		351	208
Service revenue		140	125
Total Revenues		491	333
Cost of goods sold, excluding depreciation and amortization		286	165
Operation and maintenance, General and administrative		70	75
Depreciation and amortization		56	49
Taxes other than income tax		9	8
Operating Income		70	36
Total assets		7,460		7,453
Capital expenditures		51	121
Operating Segments | Transportation and Storage
Segment Reporting Information [Line Items]
Product sales	[1]	153	106
Service revenue	[1]	141	140
Total Revenues	[1]	294	246
Cost of goods sold, excluding depreciation and amortization	[1]	140	99
Operation and maintenance, General and administrative	[1]	45	41
Depreciation and amortization	[1]	32	32
Taxes other than income tax	[1]	7	7
Operating Income	[1]	70	67
Total assets	[1]	4,966		4,963
Capital expenditures	[1]	10	9
Eliminations
Segment Reporting Information [Line Items]
Product sales		(118)	(69)
Service revenue		(1)	(1)
Total Revenues		(119)	(70)
Cost of goods sold, excluding depreciation and amortization		(118)	(69)
Operation and maintenance, General and administrative		(1)	(1)
Depreciation and amortization		0	0
Taxes other than income tax		0	0
Operating Income		0	0
Total assets		(1,265)		$ (1,204)
Capital expenditures		$ 0	$ 0

[1] See Note 6 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, 2017 and 2016.