Enable Midstream Partners (ENBL) 10-Q/A 2 Jun 14 2014 Q1 Quarterly report (amended) Financial data

DEI_Document

DEI Document	3 Months Ended
	Mar. 31, 2014	1-May-14
Document and Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Entity Registrant Name	'Enable Midstream Partners, LP	'
Entity Central Index Key	'0001591763	'
Entity Filer Category	'Non-accelerated Filer	'
Current Fiscal Year End Date	'--12-31	'
Entity Common Stock, Shares Outstanding	'	207,851,430

Condensed_Combined_and_Consoli

Condensed Combined and Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]	'	'
Revenues (including revenues from affiliates (Note 7))	$1,002	$261
Cost of Goods Sold, excluding depreciation and amortization (including expenses from affiliates (Note 7))	633	45
Operating Expenses:	'	'
Operation and maintenance (including expenses from affiliates (Note 7))	126	69
Depreciation and amortization	67	30
Taxes other than income taxes	14	9
Total Operating Expenses	207	108
Operating Income	162	108
Other Income (Expense):	'	'
Interest expense (including expenses from affiliates (Note 7))	-14	-24
Equity in earnings of equity method affiliates	3	5
Interest income—affiliated companies	0	7
Total Other Income (Expense)	-11	-12
Income Before Income Taxes	151	96
Income tax expense	1	37
Net Income	150	59
Net Income (Loss) Attributable to Noncontrolling Interest	1	0
Net Income attributable to Enable Midstream Partners, LP	149	59
Limited partners' interest in net income attributable to Enable Midstream Partners, LP (Note 1)	$149	'
Number of outstanding limited partner units (Note 1) (in units)	390	'
Basic and diluted earnings per limited partner unit (Note 1) (in dollars per unit)	$0.38	'

Condensed_Combined_and_Consoli1

Condensed Combined and Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Net Income	$150	$59
Other comprehensive income	0	0
Comprehensive income	150	59
Less: Comprehensive income attributable to noncontrolling interest	1	0
Comprehensive income attributable to Enable Midstream Partners, LP	$149	$59

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Current Assets:	'	'
Cash and cash equivalents	$12	$108
Accounts receivable	365	306
Accounts receivable—affiliated companies	21	28
Inventory	64	83
Gas imbalances	25	10
Other current assets	13	14
Total current assets	500	549
Property, Plant and Equipment:	'	'
Property, plant and equipment	9,781	9,655
Less accumulated depreciation and amortization	721	665
Property, plant and equipment, net	9,060	8,990
Other Assets:	'	'
Intangible assets, net	376	383
Goodwill	1,068	1,068
Investment in equity method affiliates	199	198
Other	55	44
Total other assets	1,698	1,693
Total Assets	11,258	11,232
Current Liabilities:	'	'
Accounts payable	284	400
Accounts payable—affiliated companies	40	40
Current portion of long-term debt	202	204
Notes payable—commercial paper	433	0
Taxes accrued	25	20
Gas imbalances	22	13
Other	33	43
Total current liabilities	1,039	720
Other Liabilities:	'	'
Accumulated deferred income taxes, net	8	8
Notes payable—affiliated companies	363	363
Regulatory liabilities	16	16
Other	33	28
Total other liabilities	420	415
Long-Term Debt	1,582	1,916
Commitments and Contingencies (Note 8)	'	'
Partners’ Capital:	'	'
Enable Midstream Partners, LP Partners’ Capital	8,183	8,148
Noncontrolling interest	34	33
Total Partners’ Capital	8,217	8,181
Total Liabilities and Partners’ Capital	$11,258	$11,232

Condensed_Combined_and_Consoli2

Condensed Combined and Consolidated of Cash Flows (Unaudited) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash Flows from Operating Activities:	'	'
Net income	$150	$59
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	67	30
Deferred income taxes	0	37
Equity in earnings of equity method affiliates, net of distributions	0	4
Amortization of debt costs and discount (premium)	-3	0
Changes in other assets and liabilities:	'	'
Accounts receivable, net	-59	1
Accounts receivable—affiliated companies	7	-26
Inventory	19	1
Gas imbalance assets	-15	0
Income taxes receivable	0	16
Other current assets	1	8
Other assets	-9	-1
Accounts payable	-61	-24
Accounts payable—affiliated companies	0	26
Gas imbalance liabilities	9	0
Other current liabilities	-5	0
Other liabilities	5	-8
Net cash provided by operating activities	106	123
Cash Flows from Investing Activities:	'	'
Capital expenditures	-149	-45
Increase in notes receivable—affiliated companies	0	-19
Other, net	0	-3
Net cash provided by (used in) investing activities	-149	-67
Cash Flows from Financing Activities:	'	'
Repayment of short term borrowing	-40	0
Proceeds from revolving credit facility	115	0
Repayment of revolving credit facility	-447	0
Increase in notes payable—commercial paper	433	0
Decrease of notes payable—affiliated companies	0	-53
Distributions to partners	-114	0
Net cash provided by (used in) financing activities	-53	-53
Net Increase in Cash and Cash Equivalents	-96	3
Cash and Cash Equivalents at Beginning of Period	108	0
Cash and Cash Equivalents at End of Period	12	3
Supplemental Disclosure of Cash Flow Information:	'	'
Interest, net of capitalized interest	15	24
Income taxes (refunds), net	0	-11
Accounts payable related to capital expenditures	$17	$21

Condensed_Combined_and_Consoli3

Condensed Combined and Consolidated Statements of Enable Midstream Partners, LP Parent Net Equity and Partners' Capital (Unaudited) (USD $)	Total	Partners’ Capital	Parent Net Investment	Accumulated Other Comprehensive Loss	Total Enable Midstream Partners, LP Partners’ Capital	Noncontrolling Interest
In Millions, unless otherwise specified
Balance, beginning of period at Dec. 31, 2012	$3,221	$0	$3,221	($6)	$3,215	$6
Balance, beginning of period, units at Dec. 31, 2012	'	0	'	'	'	'
Changes in Stockholders' Equity	'	'	'	'	'	'
Net income	59	0	59	0	59	0
Balance, end of period at Mar. 31, 2013	3,280	0	3,280	-6	3,274	6
Balance, end of period, units at Mar. 31, 2013	'	0	'	'	'	'
Balance, beginning of period at Dec. 31, 2013	8,181	8,148	0	0	8,148	33
Balance, beginning of period, units at Dec. 31, 2013	'	390	'	'	'	'
Changes in Stockholders' Equity	'	'	'	'	'	'
Net income	150	149	0	0	149	1
Distributions to partners	-114	-114	0	0	-114	0
Balance, end of period at Mar. 31, 2014	$8,217	$8,183	$0	$0	$8,183	$34
Balance, end of period, units at Mar. 31, 2014	'	390	'	'	'	'

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2014
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, Inc. (CenterPoint Energy), OGE Energy Corp. (OGE Energy) and affiliates of ArcLight Capital Partners, LLC (ArcLight), pursuant to the terms of the MFA. The Partnership is a large-scale, growth-oriented limited partnership formed to own, operate and develop strategically located natural gas and crude oil infrastructure assets. The Partnership’s assets and operations are organized into two business segments: (i) Gathering and Processing, which primarily provides natural gas gathering, processing and fractionation services and crude oil gathering for our producer customers, and (ii) Transportation and Storage, which provides interstate and intrastate natural gas pipeline transportation and storage service primarily to natural gas producers, utilities and industrial customers. The natural gas gathering and processing assets are strategically located in four states and serve natural gas production in the Anadarko, Arkoma and Ark-La-Tex basins. This segment also includes an emerging crude oil gathering business in the Bakken shale formation, principally located in the Williston basin. The natural gas transportation and storage assets extend from western Oklahoma and the Texas Panhandle to Alabama and from Louisiana to Illinois.
	As of March 31, 2014, CenterPoint Energy, OGE Energy and ArcLight held approximately 58.3%, 28.5% and 13.2%, respectively, of the limited partner interests in the Partnership. The limited partner interests of the Partnership have limited voting rights on matters affecting the business. As such, limited partners do not have rights to elect the Partnership’s General Partner on an annual or continuing basis and may not remove the Partnership’s General Partner without at least 75% vote by all unitholders, including all units held by the Partnership’s limited partners, and General Partner and its affiliates, voting together as a single class.
	The Partnership is controlled equally by CenterPoint Energy and OGE Energy, who each have 50% of the management rights of the General Partner. The General Partner was established by CenterPoint Energy and OGE Energy to govern the Partnership and has no other operating activities. The General Partner is governed by a board made up of an equal number of representatives designated by each of CenterPoint Energy and OGE Energy, along with board members CenterPoint Energy and OGE Energy mutually agreed to appoint. Based on the 50/50 management ownership, with neither company having control, effective May 1, 2013, CenterPoint Energy and OGE Energy deconsolidated their interests in the Partnership and Enogex, respectively.
	CenterPoint Energy and OGE Energy also own a 40% and 60% interest, respectively, in the incentive distribution rights held by the General Partner. Prior to the Offering of the Partnership, ArcLight had protective approval rights over certain material activities of the Partnership, including material increases in capital expenditures and certain equity issuances, entering into transactions with related parties and acquiring, pledging or disposing of certain material assets.
	Upon conversion to a limited partnership on May 1, 2013, the Partnership’s earnings are no longer subject to income tax (other than Texas state margin taxes) and are taxable at the individual partner level. As a result of the conversion to a partnership immediately prior to formation, CenterPoint Energy assumed all outstanding current income tax liabilities and the Partnership derecognized the deferred income tax assets and liabilities by recording an income tax benefit of $1.24 billion. Consequently, the Combined and Consolidated Statements of Income do not include an income tax provision on income earned on or after May 1, 2013 (other than Texas state margin taxes). See Note 9 for further discussion of the Partnership’s income taxes.
	Prior to May 1, 2013, the financial statements of the Partnership include EGT, MRT and the non-rate regulated natural gas gathering, processing and treating operations, which were under common control by CenterPoint Energy, and a 50% interest in SESH. Through the Partnership's formation on May 1, 2013, CenterPoint Energy retained certain assets and liabilities and related balances in accumulated other comprehensive loss, historically held by the Partnership, such as certain notes payable—affiliated companies to CenterPoint Energy and benefit plan obligations. Additionally, the Partnership distributed a 25.05% interest in SESH to CenterPoint Energy, subject to future acquisition by the Partnership through put and call options discussed in Note 4. On May 1, 2013, OGE Energy and ArcLight indirectly contributed 100% of the equity interests in Enogex to the Partnership in exchange for limited partner interests and, for OGE Energy only, interests in the General Partner. The Partnership concluded that the Partnership formation on May 1, 2013 was considered a business combination, and for accounting purposes, the Partnership was the acquirer of Enogex. Subsequent to May 1, 2013, the financial statements of the Partnership are consolidated to reflect the acquisition of Enogex and the remaining 24.95% interest in SESH. See Note 2 for further discussion of the acquisition of Enogex.
	In addition, at March 31, 2014, as a result of the acquisition of Enogex on May 1, 2013, the Partnership held a 50% ownership interest in Atoka Midstream LLC (Atoka). At March 31, 2014, the Partnership consolidated Atoka in its Condensed Combined and Consolidated Financial Statements as Enable Oklahoma acted as the managing member of Atoka and had control over the operations of Atoka.
	As further discussed in Note 11, the Partnership completed its initial public offering on April 16, 2014.
	Basis of Presentation
	The accompanying condensed combined and 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 combined and consolidated financial statements and related notes should be read in conjunction with the combined and consolidated financial statements and related notes included in the Prospectus.
	For accounting and financial reporting purposes, (i) the formation of the Partnership is considered a contribution of real estate by CenterPoint Energy and is reflected at CenterPoint Energy’s historical cost as of May 1, 2013 and (ii) the Partnership acquired Enogex on May 1, 2013.
	The condensed combined and consolidated financial statements for the three months ended March 31, 2013 have been prepared from the historical accounting records maintained by CenterPoint Energy for the Partnership until May 1, 2013 and may not necessarily be indicative of the condition that would have existed or the results of operations if the Partnership had been operated as a separate and unaffiliated entity. All of Partnership’s historical combined entities were under common control and management for the periods presented until May 1, 2013, and all intercompany transactions and balances are eliminated in combination and consolidation, as applicable. Beginning on May 1, 2013, the Partnership consolidated Enogex and all previously combined entities of the Partnership.
	These condensed combined and 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 Combined and 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.
	Certain amounts in the operating section of the Partnership’s historical condensed combined and consolidated statements of cash flows have been reclassified to conform the presentation.
	For a description of the Partnership’s reportable business segments, see Note 10.
	Earnings per Limited Partner Unit
	Limited partners’ interest in net income attributable to the Partnership and basic and diluted earnings per unit reflect net income attributable to the Partnership for periods subsequent to its formation as a limited partnership on May 1, 2013, as no limited partner units were outstanding prior to this date.
	Earnings per limited partner unit is calculated by dividing the limited partners’ interest in net income attributable to the Partnership by the weighted average number of limited partner units outstanding. Earnings per limited partner unit assumes that cash distributions are equal to the limited partners’ interest in net income attributable to the Partnership. The 6,322,457 and 25,341 limited partner units that may be issued in connection with acquiring the additional 24.95% and 0.10% interests in SESH, respectively, as discussed in Note 4, are not included in the calculation of diluted earnings per limited partner unit as the impact of the potential transactions is anti-dilutive.
	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.
	Reverse Unit Split
	On March 25, 2014, the Partnership effected a 1 for 1.279082616 reverse unit split. All unit and per unit amounts presented within the condensed combined and consolidated financial statements reflect the effects of the reverse unit split.

Acquisition_of_Enogex

Acquisition of Enogex	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Acquisition of Enogex	'
	Acquisition of Enogex
	While the acquisition of Enogex did not occur during the periods presented, this disclosure provides the context for the change in equity and depreciation and amortization between the periods presented.
	Under the acquisition method, the fair value of the consideration transferred by the Partnership to OGE Energy and ArcLight for the contribution of Enogex in exchange for interest in the Partnership was allocated to the assets acquired and liabilities assumed on May 1, 2013 based on their estimated fair value. Enogex’s assets, liabilities and equity are recorded at their estimated fair value as of May 1, 2013, and beginning on May 1, 2013, the Partnership consolidated Enogex.
	On May 1, 2013, in accordance with the MFA, CenterPoint Energy, OGE Energy, and ArcLight received 227,508,825 common units, 110,982,805 common units, and 51,527,730 common units, respectively, representing limited partner interests in the Partnership. The fair value of consideration transferred to OGE Energy and ArcLight in exchange for the contribution of Enogex consists of the fair value of the limited and general partner interests. The Partnership utilized the market approach to estimate the fair value of the limited partner interests, general partner interests and Atoka, also giving consideration to alternative methods such as the income and cost approaches as it relates to the underlying assets and liabilities. The primary inputs for the market valuation were the historical and current year forecasted cash flows and market multiple. The primary inputs for the income approach were forecasted cash flows and the discount rate. The primary inputs for the cost approach were costs for similar assets and ages of the assets. All fair value measurements of assets acquired and liabilities assumed were based on a combination of inputs that were not observable in the market and thus represented Level 3 inputs.
	The Partnership incurred no acquisition related costs in the Condensed Combined and Consolidated Statement of Income based upon the terms in the MFA.
	The following table summarizes the amounts recognized by the Partnership for the estimated fair value of assets acquired and liabilities assumed for the acquisition of the 100% interest in Enogex as of May 1, 2013 and is reconciled to the consideration transferred by the Partnership:
		Amounts Recognized as of May 1, 2013
		(In millions)
	Assets
	Current Assets	$	192
	Property, plant and equipment	3,919
	Goodwill	439
	Other intangible assets	401
	Other assets	21
	Total assets	$	4,972
	Liabilities
	Current liabilities	$	393
	Long-term debt	745
	Other liabilities	20
	Total liabilities	1,158
	Less: Noncontrolling interest at fair value	26
	Fair value of consideration transferred	$	3,788
	Impact on Depreciation
	The property, plant and equipment acquired from Enogex have differing weighted average useful lives from the existing assets of the Partnership. These assets will be depreciated over a weighted average estimated useful life of 32 years.
	Pro forma Results of Operations
	The Partnership’s pro forma results of operations in the combined entity had the acquisition of Enogex been completed on January 1, 2013 are as follows:
		Three Months Ended
		March 31, 2013
		(In millions)
	Pro forma results of operations:
	Pro forma revenues	$	726
	Pro forma operating income	120
	Pro forma net income	75
	Pro forma net income attributable to Enable Midstream Partners, LP	75
	The pro forma consolidated results of operations include adjustments to:
	•	Include the historical results of Enogex beginning on January 1, 2013;
	•	Include incremental depreciation and amortization incurred on the step-up of Enogex’s assets;
	•	Include adjustments to revenue and cost of sales to reflect Enogex purchase price adjustments for the recurring impact of certain loss contracts and deferred revenues; and
	•	Include a reduction to interest expense for recognition of a premium on Enogex’s fixed rate senior notes.
	The pro forma information is not necessarily indicative of the results of operations that would have occurred had the transactions been made at the beginning of the periods presented or the future results of the consolidated operations.

Intangible_Assets_Net

Intangible Assets, Net	3 Months Ended
	Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Intangible Assets, Net	'
	Intangible Assets, Net
	During the three months ended March 31, 2014, the Partnership’s intangible assets decreased $7 million due to amortization.

Investment_in_Equity_Method_Af

Investment in Equity Method Affiliates	3 Months Ended
	Mar. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
Investments in Equity Method Affiliates	'
	Investments in Equity Method Affiliates
	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. Until May 1, 2013, the Partnership held a 50% investment in SESH, a 289-mile interstate natural gas pipeline, which was accounted for as an investment in equity method affiliates. On May 1, 2013, the Partnership distributed a 25.05% interest in SESH to CenterPoint Energy, retaining a 24.95% interest in SESH.
	Following the distribution of SESH, CenterPoint Energy indirectly owns a 25.05% interest in SESH that may be contributed to the Partnership upon exercise of certain put or call rights, under which CenterPoint Energy would contribute to the Partnership CenterPoint Energy’s retained interest in SESH at a price equal to the fair market value of such interest at the time the put right or call right is exercised (which may be no earlier than May 2014 and May 2015 for 24.95% and 0.1% interest, respectively). On May 13, 2014, CenterPoint Energy exercised its put right with respect to a 24.95% interest in SESH. Pursuant to the put right, CenterPoint Energy will contribute its 24.95% interest in SESH to the Partnership in exchange for 6,322,457 common units representing limited partner interests in the Partnership. Subject to certain restrictions, if the fair market value of the contributed SESH interest is more or less than the value of the common units issued as consideration for the SESH interest, a cash payment may be required to be made by either the Partnership or CenterPoint Energy. In accordance with the terms of the put right, the parties are currently in negotiations regarding the fair market value of the SESH interest. If CenterPoint Energy were to exercise its remaining put right or the Partnership were to exercise its remaining call right, CenterPoint Energy’s retained interest in SESH would be contributed to the Partnership in exchange for consideration consisting of 25,341 limited partner units for 0.1% interest in SESH and, subject to certain restrictions, a cash payment, payable either from CenterPoint Energy to the Partnership or from the Partnership to CenterPoint Energy, in an amount such that the total consideration exchanged is equal in value to the fair market value of the contributed interest in SESH, subject to adjustment for accretion and dilution events. Affiliates of Spectra Energy Corp own the remaining 50% interest in SESH.
	Investment in Equity Method Affiliates:
		March 31,		December 31,
		2014		2013
		(In millions)
	SESH	$	199	$	198
	Equity in Earnings of Equity Method Affiliates:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	SESH	$	3	$	5
	Distributions from Equity Method Affiliates:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	SESH	$	3	$	9
	Summarized financial information of SESH is presented below:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	Income Statements:
	Revenues	$	27	$	27
	Operating income	17		15
	Net income	12		10

Debt

Debt	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Debt	'
	Debt
	The Partnership has a $1.05 billion three years senior unsecured term loan facility (Term Loan Facility). A wholly owned subsidiary of CenterPoint Energy has guaranteed collection of the Partnership’s obligations under the Term Loan Facility, which guarantee is subordinated to all senior debt of such wholly owned subsidiary of CenterPoint Energy.
	The Partnership also has a $1.4 billion, five years senior unsecured revolving credit facility (Revolving Credit Facility). As of March 31, 2014, there were no principal advances and $2 million in letters of credit outstanding under the Revolving Credit Facility. However, as discussed below, commercial paper borrowings effectively reduce our borrowing capacity under this Revolving Credit Facility.
	The Term Loan Facility and the Revolving Credit Facility each permit outstanding borrowings to bear interest at the LIBOR and/or an alternate base rate, at the Partnership’s election, plus an applicable margin. The applicable margin is based on the Partnership’s applicable credit ratings. As of March 31, 2014, the applicable margin for LIBOR-based borrowings under the Term Loan Facility and the Revolving Credit Facility was 1.625% 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, 2014, the commitment fee under the Revolving Credit Facility was 0.25% per annum based on the Partnership’s credit ratings.
	In January 2014, the Partnership commenced 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. As of March 31, 2014, $433 million was outstanding under our commercial paper program. Any reduction in our credit ratings could prevent us from accessing the commercial paper markets.
	The Partnership’s debt includes Enable Oklahoma’s $200 million of 6.875% senior notes due July 2014 and $250 million of 6.25% senior notes due March 2020 (collectively, the Enable Oklahoma Senior Notes). The Enable Oklahoma Senior Notes have a $34 million unamortized premium at March 31, 2014, of which $2 million relates to the senior notes due July 2014 and $32 million relates to the senior notes due March 2020. Additionally, the Partnership’s debt includes Enable Oklahoma’s $250 million variable rate term loan (Enable Oklahoma Term Loan). The Enable Oklahoma Term Loan permits outstanding borrowings to bear interest at the LIBOR and/or an alternate base rate, at Enable Oklahoma’s election, plus an applicable margin. The applicable margin is based on Enable Oklahoma’s applicable credit ratings. As of March 31, 2014, the applicable margin for LIBOR-based borrowings under the Enable Oklahoma Term Loan was 1.50% based on Enable Oklahoma’s credit ratings.
	Unamortized debt expense of $9 million at both March 31, 2014 and December 31, 2013, is classified in Other Assets in the Condensed Consolidated Balance Sheets and is being amortized over the life of the respective debt. Unamortized premium on long-term debt of $34 million and $37 million at March 31, 2014 and December 31, 2013, respectively, is classified as either Long-Term Debt or Current Portion of Long-Term Debt, consistent with the underlying debt instrument, in the Condensed Consolidated Balance Sheets and is being amortized over the life of the respective debt.
	At March 31, 2014, the Partnership and Enable Oklahoma were in compliance with all of their debt agreements, including financial covenants.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2014
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 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 three months ended March 31, 2014, there were no transfers between Level 1 and 2, and no Level 3 investments were held.
	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, short-term notes payable—affiliated companies, notes payable—commercial paper, and other such financial instruments on the Condensed Consolidated Balance Sheets are estimated to be approximately equivalent to their carrying amounts and have been excluded from the table below. The following table summarizes the fair value and carrying amount of the Partnership’s financial instruments at March 31, 2014 and December 31, 2013. The Partnership had no material financial instruments measured at fair value on a recurring basis at March 31, 2014 and December 31, 2013.
		March 31, 2014				December 31, 2013
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
		(In millions)
	Long-Term Debt
	Long-term notes payable - affiliated companies (Level 2)	$	363	$	365	$	363	$	363
	Revolving Credit Facility (Level 2)(1)	—		—		333		333
	Term Loan Facility (Level 2)	1,050		1,050		1,050		1,050
	Enable Oklahoma Term Loan (Level 2)	250		250		250		250
	Enable Oklahoma Senior Notes (Level 2)(2)	484		475		487		477
	___________________
	-1	Borrowing capacity is reduced by our borrowings outstanding under the commercial paper program, which were $433 million as of March 31, 2014.
	-2	Includes $202 million of current portion as of March 31, 2014.
	The fair value of the Partnership’s Term Loan Facility and Long-term notes payable—affiliated companies, along with the Enable Oklahoma Senior 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).
	At March 31, 2014 and December 31, 2013, 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 Partnership had no material commodity contracts recorded at fair value on its Condensed Consolidated Balance Sheet at March 31, 2014 and December 31, 2013.
	The following tables summarize the Partnership’s assets and liabilities that are measured at fair value on a recurring basis at March 31, 2014 and December 31, 2013:
		Gas Imbalances (1)
		March 31, 2014				December 31, 2013
		Assets (2)		Liabilities (3)		Assets (2)		Liabilities (3)
		(In millions)
	Significant other observable inputs (Level 2)	$	16	$	18	$	8	$	10
	______________________
	-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 Enable Oklahoma 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, 2014 and December 31, 2013.
	-2	Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $9 million and $2 million at March 31, 2014 and December 31, 2013, 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 $4 million and $3 million at March 31, 2014 and December 31, 2013, 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.

Related_Party_Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2014
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.
	The Partnership’s revenues from affiliated companies accounted for 6% and 15% of revenues during the three months ended March 31, 2014 and 2013, respectively. Amounts of revenues from affiliated companies included in the Partnership’s Combined and Consolidated Statements of Income are summarized as follows:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	Gas transportation and storage - CenterPoint Energy	$	33	$	32
	Gas sales - CenterPoint Energy	15		7
	Gas transportation and storage - OGE Energy (1)	12		—
	Gas sales - OGE Energy (1)	5		—
	Total revenues - affiliated companies	$	65	$	39
	____________________
	-1	The Partnership's contracts with OGE Energy to transport and sell natural gas to OGE Energy’s natural gas-fired generation facilities and store natural gas are reflected in Partnership’s Condensed Combined and Consolidated Statement of Income beginning on May 1, 2013. On March 17, 2014, the Partnership and the electric utility subsidiary of OGE Energy signed a new transportation agreement effective May 1, 2014 with a primary term 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.
	Amounts of natural gas purchased from affiliated companies included in the Partnership’s Condensed Combined and Consolidated Statements of Income are summarized as follows:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	Cost of goods sold - CenterPoint Energy	$	1	$	—
	Cost of goods sold - OGE Energy	3		—
	Total cost of goods sold - affiliated companies	$	4	$	—
	Prior to May 1, 2013, the Partnership had employees and reflected the associated benefit costs directly and not as corporate services. Under the terms of the MFA, effective May 1, 2013 the Partnership’s employees were seconded by CenterPoint Energy and OGE Energy, and the Partnership began reimbursing each of CenterPoint Energy and OGE Energy for all employee costs under the seconding agreements until terminated with at least 90 days’ notice by CenterPoint Energy or OGE Energy, respectively, or by the Partnership. The Partnership anticipates transitioning seconded employees from CenterPoint Energy and OGE Energy to the Partnership effective January 1, 2015.
	Prior to May 1, 2013, the Partnership received certain services and support functions from CenterPoint Energy described below. Under the terms of the MFA, effective May 1, 2013, the Partnership receives services and support functions from each of CenterPoint Energy and OGE Energy under service agreements for an initial term ending 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. Additionally, the Partnership may terminate these service agreements at any time with 180 days’ notice, if approved by the Board of the General Partner. The Partnership reimburses CenterPoint Energy and OGE Energy for these services up to annual caps, which for 2014 are $38 million and $28 million, respectively.
	Effective April 1, 2014, the Partnership, CenterPoint Energy and OGE Energy agreed to reduce certain allocated costs charged to the Partnership because the Partnership has assumed responsibility for the related activities. During the three months ended March 31, 2014, the Partnership was billed $3 million and $1 million by CenterPoint and OGE Energy, respectively, related to such allocated costs.
	Amounts charged to the Partnership by affiliates for seconded employees and corporate services, included primarily in operating and maintenance expenses in Partnership’s Combined and Consolidated Statements of Income are as follows:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	Seconded Employee Costs - CenterPoint Energy (1)	$	38	$	—
	Corporate Services - CenterPoint Energy	11		11
	Seconded Employee Costs - OGE Energy (2)	31		—
	Corporate Services - OGE Energy (2)	6		—
	Total corporate services and seconded employees expense	$	86	$	11
	_________________________
	-1	Beginning on May 1, 2013, CenterPoint Energy assumed all employees of the Partnership and seconded such employees to the Partnership. Therefore, costs historically incurred directly by the Partnership for employment services are reflected as seconded employee costs subsequent to formation on May 1, 2013.
	-2	Corporate services and seconded employee expenses from OGE Energy are reflected in the Condensed Combined and Consolidated Statement of Income beginning on May 1, 2013.
	The Partnership has outstanding long-term notes payable—affiliated companies to CenterPoint Energy at both March 31, 2014 and December 31, 2013 of $363 million which mature in 2017. Notes having an aggregate principal amount of approximately $273 million bear a fixed interest rate of 2.10% and notes having an aggregate principal amount of approximately $90 million bear a fixed interest rate of 2.45%.
	The Partnership recorded affiliated interest expense to CenterPoint Energy of $2 million and $24 million during the three months ended March 31, 2014 and 2013, respectively, on notes payable—affiliated companies.
	The Partnership recorded no interest income—affiliated companies from CenterPoint Energy during the three months ended March 31, 2014 and $7 million during three months ended March 31, 2013 on notes receivable - affiliated companies.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2014
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.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	The items comprising income tax expense are as follows:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	Provision (Benefit) for Current Income Taxes
	Federal	$	—	$	(1	)
	State	1		—
	Total Provision (Benefit) for Current Income Taxes	1		(1		)
	Provision (Benefit) for Deferred Income Taxes, net
	Federal	$	—	33
	State	—		5
	Total Provision (Benefit) for Deferred Income Taxes, net	—		38
	Total Income Tax Expense (Benefit)	$	1	$	37
	Upon conversion to a limited partnership on May 1, 2013, the Partnership’s earnings are no longer subject to income tax (other than Texas state margin taxes) and are taxable at the individual partner level. The Partnership and its subsidiaries are pass-through entities for federal income tax purposes. For these entities, all income, expenses, gains, losses and tax credits generated flow through to their owners and, accordingly, do not result in a provision for income taxes in the condensed combined and consolidated financial statements (other than Texas state margin taxes). Consequently, the Condensed Combined and Consolidated Statements of Income do not include an income tax provision for income earned on or after May 1, 2013 (other than Texas state margin taxes).

Reportable_Business_Segments

Reportable Business Segments	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Reportable Business Segments	'
	Reportable Business Segments
	The Partnership’s determination of reportable business segments considers the strategic operating units under which it manages sales, allocates resources and assesses performance of various products and services to wholesale or retail customers in differing regulatory environments. The accounting policies of the business segments are the same as those described in the summary of significant accounting policies excerpt in the Partnership’s audited 2013 combined and consolidated financial statements included in the Prospectus, which explain that some executive benefit costs of the Partnership prior to May 1, 2013 have not been allocated to business segments. The Partnership uses operating income as the measure of profit or loss for its business segments.
	The Partnership’s assets and operations are organized into two business segments: (i) Gathering and Processing, which primarily provides natural gas gathering, processing and fractionation services and crude oil gathering for our producer customers, and (ii) Transportation and Storage, which provides interstate and intrastate natural gas pipeline transportation and storage service primarily to natural gas producers, utilities and industrial customers. Effective May 1, 2013, the intrastate natural gas pipeline operations acquired from Enogex were combined with the interstate pipelines in the transportation and storage segment and the non-rate regulated natural gas gathering, processing and treating operations acquired from Enogex were combined with field services in the gathering and processing segment.
	Financial data for business segments and services are as follows:
	Three Months Ended March 31, 2014	Gathering  and		Transportation		Eliminations			Total
		Processing		and Storage(1)
		(In millions)
	Revenues	$	671	$	528	$	(197	)	$	1,002
	Cost of goods sold, excluding depreciation and amortization	464		366		(197		)	633
	Operation and maintenance	69		57		—			126
	Depreciation and amortization	38		29		—			67
	Taxes other than income	4		10		—			14
	Operating income	$	96	$	66	$	—		$	162
	Total assets	$	7,306	$	5,718	$	(1,766	)	$	11,258
	Capital expenditures	$	129	$	21	$	(1	)	$	149
	Three Months Ended March 31, 2013	Gathering and		Transportation		Eliminations			Total
		Processing		and Storage(1)
		(In millions)
	Revenues	$	142	$	132	$	(13	)	$	261
	Cost of goods sold, excluding depreciation and amortization	38		19		(12		)	45
	Operation and maintenance	31		39		(1		)	69
	Depreciation and amortization	15		15		—			30
	Taxes other than income	2		7		—			9
	Operating income	$	56	$	52	$	—		$	108
	Total assets as of December 31, 2013	$	7,157	$	5,717	$	(1,642	)	$	11,232
	Capital expenditures	$	16	$	29	$	—		$	45
	_____________________
	-1	Transportation and storage recorded equity income of $3 million and $5 million for the three months ended March 31, 2014 and 2013, respectively, from its interest in SESH, a jointly-owned pipeline. These amounts are included in Equity in earnings of equity method affiliates under the Other Income (Expense) caption. Transportation and Storage’s investment in SESH was $199 million and $198 million as of March 31, 2014 and December 31, 2013, respectively, and is included in Investments in equity method affiliates. The Partnership reflected a 50% interest in SESH until May 1, 2013 when the Partnership distributed a 25.05% interest in SESH to CenterPoint Energy. See Note 6 for further discussion regarding SESH.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	Subsequent Events
	Distribution
	On May 14, 2014, the Partnership distributed $155 million to its unitholders of record as of April 1, 2014 for the first quarter of 2014. The amount of this distribution is based on the methodology set forth in the Partnership's limited partnership agreement in effect prior to the Offering, which differs from the methodology that will be used for future distributions as set forth under the Second Amended and Restated Agreement of Limited Partnership of Enable Midstream Partners, LP.
	Initial Public Offering
	On April 16, 2014, the Partnership completed the Offering of 25,000,000 common units, representing limited partner interests in the Partnership, at a price to the public of $20.00 per common unit. The Partnership received net proceeds of $465 million from the sale of the common units, after deducting underwriting discounts and commissions, the structuring fee and offering expenses. In connection with the Offering, underwriters exercised their option to purchase 3,750,000 additional common units which were fulfilled with units held by ArcLight. As a result, the Partnership did not receive any proceeds from the sale of common units pursuant to the exercise of the underwriters' option to purchase additional common units. The exercise of the underwriters' option to purchase additional common units did not affect the total number of units outstanding or the amount of cash needed to pay the minimum quarterly distribution on all outstanding units. The Partnership retained the net proceeds of the Offering for general partnership purposes, including the funding of expansion capital expenditures, and to pre-fund demand fees expected to be incurred over the next three years relating to certain expiring transportation and storage contracts.
	In connection with the Offering, 139,704,916 of CenterPoint Energy's common units and 68,150,514 of OGE Energy's common units were converted into subordinated units. The principal difference between the common and subordinated units is that in any quarter during the subordination period, holders of the subordinated units are not entitled to receive any distribution of available cash until the common units have received the minimum quarterly distribution plus any arrearages in the payment of the minimum quarterly distribution from prior quarters. If the Partnership does not pay distributions on its subordinated units, its subordinated units will not accrue arrearages for those unpaid distributions. At the closing of the Offering, CenterPoint Energy held 87,803,909 common units and 139,704,916 subordinated units, and OGE Energy held 42,832,291 common units and 68,150,514 subordinated units.
	Second Amended and Restated Agreement of Limited Partnership of Enable Midstream Partners, LP
	On April 16, 2014, in connection with the closing of the Offering of the Partnership, the Partnership amended and restated its First Amended and Restated Agreement of Limited Partnership to remove certain provisions that expired upon completion of the Offering.
	CenterPoint Energy Exercise of Put Right
	As further discussed in Note 4, on May 13, 2014, CenterPoint Energy exercised its put right with respect to its 24.95% in SESH.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2014
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, Inc. (CenterPoint Energy), OGE Energy Corp. (OGE Energy) and affiliates of ArcLight Capital Partners, LLC (ArcLight), pursuant to the terms of the MFA. The Partnership is a large-scale, growth-oriented limited partnership formed to own, operate and develop strategically located natural gas and crude oil infrastructure assets. The Partnership’s assets and operations are organized into two business segments: (i) Gathering and Processing, which primarily provides natural gas gathering, processing and fractionation services and crude oil gathering for our producer customers, and (ii) Transportation and Storage, which provides interstate and intrastate natural gas pipeline transportation and storage service primarily to natural gas producers, utilities and industrial customers. The natural gas gathering and processing assets are strategically located in four states and serve natural gas production in the Anadarko, Arkoma and Ark-La-Tex basins. This segment also includes an emerging crude oil gathering business in the Bakken shale formation, principally located in the Williston basin. The natural gas transportation and storage assets extend from western Oklahoma and the Texas Panhandle to Alabama and from Louisiana to Illinois.
	As of March 31, 2014, CenterPoint Energy, OGE Energy and ArcLight held approximately 58.3%, 28.5% and 13.2%, respectively, of the limited partner interests in the Partnership. The limited partner interests of the Partnership have limited voting rights on matters affecting the business. As such, limited partners do not have rights to elect the Partnership’s General Partner on an annual or continuing basis and may not remove the Partnership’s General Partner without at least 75% vote by all unitholders, including all units held by the Partnership’s limited partners, and General Partner and its affiliates, voting together as a single class.
	The Partnership is controlled equally by CenterPoint Energy and OGE Energy, who each have 50% of the management rights of the General Partner. The General Partner was established by CenterPoint Energy and OGE Energy to govern the Partnership and has no other operating activities. The General Partner is governed by a board made up of an equal number of representatives designated by each of CenterPoint Energy and OGE Energy, along with board members CenterPoint Energy and OGE Energy mutually agreed to appoint. Based on the 50/50 management ownership, with neither company having control, effective May 1, 2013, CenterPoint Energy and OGE Energy deconsolidated their interests in the Partnership and Enogex, respectively.
	CenterPoint Energy and OGE Energy also own a 40% and 60% interest, respectively, in the incentive distribution rights held by the General Partner. Prior to the Offering of the Partnership, ArcLight had protective approval rights over certain material activities of the Partnership, including material increases in capital expenditures and certain equity issuances, entering into transactions with related parties and acquiring, pledging or disposing of certain material assets.
	Upon conversion to a limited partnership on May 1, 2013, the Partnership’s earnings are no longer subject to income tax (other than Texas state margin taxes) and are taxable at the individual partner level. As a result of the conversion to a partnership immediately prior to formation, CenterPoint Energy assumed all outstanding current income tax liabilities and the Partnership derecognized the deferred income tax assets and liabilities by recording an income tax benefit of $1.24 billion. Consequently, the Combined and Consolidated Statements of Income do not include an income tax provision on income earned on or after May 1, 2013 (other than Texas state margin taxes). See Note 9 for further discussion of the Partnership’s income taxes.
	Prior to May 1, 2013, the financial statements of the Partnership include EGT, MRT and the non-rate regulated natural gas gathering, processing and treating operations, which were under common control by CenterPoint Energy, and a 50% interest in SESH. Through the Partnership's formation on May 1, 2013, CenterPoint Energy retained certain assets and liabilities and related balances in accumulated other comprehensive loss, historically held by the Partnership, such as certain notes payable—affiliated companies to CenterPoint Energy and benefit plan obligations. Additionally, the Partnership distributed a 25.05% interest in SESH to CenterPoint Energy, subject to future acquisition by the Partnership through put and call options discussed in Note 4. On May 1, 2013, OGE Energy and ArcLight indirectly contributed 100% of the equity interests in Enogex to the Partnership in exchange for limited partner interests and, for OGE Energy only, interests in the General Partner. The Partnership concluded that the Partnership formation on May 1, 2013 was considered a business combination, and for accounting purposes, the Partnership was the acquirer of Enogex. Subsequent to May 1, 2013, the financial statements of the Partnership are consolidated to reflect the acquisition of Enogex and the remaining 24.95% interest in SESH. See Note 2 for further discussion of the acquisition of Enogex.
	In addition, at March 31, 2014, as a result of the acquisition of Enogex on May 1, 2013, the Partnership held a 50% ownership interest in Atoka Midstream LLC (Atoka). At March 31, 2014, the Partnership consolidated Atoka in its Condensed Combined and Consolidated Financial Statements as Enable Oklahoma acted as the managing member of Atoka and had control over the operations of Atoka.
	As further discussed in Note 11, the Partnership completed its initial public offering on April 16, 2014.
Basis of Presentation	'
	Basis of Presentation
	The accompanying condensed combined and 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 combined and consolidated financial statements and related notes should be read in conjunction with the combined and consolidated financial statements and related notes included in the Prospectus.
	For accounting and financial reporting purposes, (i) the formation of the Partnership is considered a contribution of real estate by CenterPoint Energy and is reflected at CenterPoint Energy’s historical cost as of May 1, 2013 and (ii) the Partnership acquired Enogex on May 1, 2013.
	The condensed combined and consolidated financial statements for the three months ended March 31, 2013 have been prepared from the historical accounting records maintained by CenterPoint Energy for the Partnership until May 1, 2013 and may not necessarily be indicative of the condition that would have existed or the results of operations if the Partnership had been operated as a separate and unaffiliated entity. All of Partnership’s historical combined entities were under common control and management for the periods presented until May 1, 2013, and all intercompany transactions and balances are eliminated in combination and consolidation, as applicable. Beginning on May 1, 2013, the Partnership consolidated Enogex and all previously combined entities of the Partnership.
	These condensed combined and 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 Combined and 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.
	Certain amounts in the operating section of the Partnership’s historical condensed combined and consolidated statements of cash flows have been reclassified to conform the presentation.
	For a description of the Partnership’s reportable business segments, see Note 10.
Earnings per Limited Partner Unit	'
	Earnings per Limited Partner Unit
	Limited partners’ interest in net income attributable to the Partnership and basic and diluted earnings per unit reflect net income attributable to the Partnership for periods subsequent to its formation as a limited partnership on May 1, 2013, as no limited partner units were outstanding prior to this date.
	Earnings per limited partner unit is calculated by dividing the limited partners’ interest in net income attributable to the Partnership by the weighted average number of limited partner units outstanding. Earnings per limited partner unit assumes that cash distributions are equal to the limited partners’ interest in net income attributable to the Partnership. The 6,322,457 and 25,341 limited partner units that may be issued in connection with acquiring the additional 24.95% and 0.10% interests in SESH, respectively, as discussed in Note 4, are not included in the calculation of diluted earnings per limited partner unit as the impact of the potential transactions is anti-dilutive.
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.

Acquisition_of_Enogex_Tables

Acquisition of Enogex (Tables)	3 Months Ended
	Mar. 31, 2014
Business Combinations [Abstract]	'
Schedule of Assets Acquired and Liabilities Assumed	'
	The following table summarizes the amounts recognized by the Partnership for the estimated fair value of assets acquired and liabilities assumed for the acquisition of the 100% interest in Enogex as of May 1, 2013 and is reconciled to the consideration transferred by the Partnership:
		Amounts Recognized as of May 1, 2013
		(In millions)
	Assets
	Current Assets	$	192
	Property, plant and equipment	3,919
	Goodwill	439
	Other intangible assets	401
	Other assets	21
	Total assets	$	4,972
	Liabilities
	Current liabilities	$	393
	Long-term debt	745
	Other liabilities	20
	Total liabilities	1,158
	Less: Noncontrolling interest at fair value	26
	Fair value of consideration transferred	$	3,788
Pro Forma Information	'
	The Partnership’s pro forma results of operations in the combined entity had the acquisition of Enogex been completed on January 1, 2013 are as follows:
		Three Months Ended
		March 31, 2013
		(In millions)
	Pro forma results of operations:
	Pro forma revenues	$	726
	Pro forma operating income	120
	Pro forma net income	75
	Pro forma net income attributable to Enable Midstream Partners, LP	75

Investment_in_Unconsolidated_A

Investment in Unconsolidated Affiliates (Tables)	3 Months Ended
	Mar. 31, 2014
Equity Method Investments and Joint Ventures [Abstract]	'
Schedule of Investments Detail	'
	Investment in Equity Method Affiliates:
		March 31,		December 31,
		2014		2013
		(In millions)
	SESH	$	199	$	198
	Equity in Earnings of Equity Method Affiliates:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	SESH	$	3	$	5
	Distributions from Equity Method Affiliates:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	SESH	$	3	$	9
	Summarized financial information of SESH is presented below:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	Income Statements:
	Revenues	$	27	$	27
	Operating income	17		15
	Net income	12		10

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2014
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 at March 31, 2014 and December 31, 2013. The Partnership had no material financial instruments measured at fair value on a recurring basis at March 31, 2014 and December 31, 2013.
		March 31, 2014				December 31, 2013
		Carrying Amount		Fair Value		Carrying Amount		Fair Value
		(In millions)
	Long-Term Debt
	Long-term notes payable - affiliated companies (Level 2)	$	363	$	365	$	363	$	363
	Revolving Credit Facility (Level 2)(1)	—		—		333		333
	Term Loan Facility (Level 2)	1,050		1,050		1,050		1,050
	Enable Oklahoma Term Loan (Level 2)	250		250		250		250
	Enable Oklahoma Senior Notes (Level 2)(2)	484		475		487		477
	___________________
	-1	Borrowing capacity is reduced by our borrowings outstanding under the commercial paper program, which were $433 million as of March 31, 2014.
	-2	Includes $202 million of current portion as of March 31, 2014.
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 at March 31, 2014 and December 31, 2013:
		Gas Imbalances (1)
		March 31, 2014				December 31, 2013
		Assets (2)		Liabilities (3)		Assets (2)		Liabilities (3)
		(In millions)
	Significant other observable inputs (Level 2)	$	16	$	18	$	8	$	10
	______________________
	-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 Enable Oklahoma 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, 2014 and December 31, 2013.
	-2	Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $9 million and $2 million at March 31, 2014 and December 31, 2013, 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 $4 million and $3 million at March 31, 2014 and December 31, 2013, 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.

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	3 Months Ended
	Mar. 31, 2014
Related Party Transactions [Abstract]	'
Schedule of Revenues from Related Parties	'
	Amounts of revenues from affiliated companies included in the Partnership’s Combined and Consolidated Statements of Income are summarized as follows:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	Gas transportation and storage - CenterPoint Energy	$	33	$	32
	Gas sales - CenterPoint Energy	15		7
	Gas transportation and storage - OGE Energy (1)	12		—
	Gas sales - OGE Energy (1)	5		—
	Total revenues - affiliated companies	$	65	$	39
	____________________
	-1	The Partnership's contracts with OGE Energy to transport and sell natural gas to OGE Energy’s natural gas-fired generation facilities and store natural gas are reflected in Partnership’s Condensed Combined and Consolidated Statement of Income beginning on May 1, 2013. On March 17, 2014, the Partnership and the electric utility subsidiary of OGE Energy signed a new transportation agreement effective May 1, 2014 with a primary term 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.
Schedule of Natural Gas Purchased From Related Parties	'
	Amounts of natural gas purchased from affiliated companies included in the Partnership’s Condensed Combined and Consolidated Statements of Income are summarized as follows:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	Cost of goods sold - CenterPoint Energy	$	1	$	—
	Cost of goods sold - OGE Energy	3		—
	Total cost of goods sold - affiliated companies	$	4	$	—
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 operating and maintenance expenses in Partnership’s Combined and Consolidated Statements of Income are as follows:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	Seconded Employee Costs - CenterPoint Energy (1)	$	38	$	—
	Corporate Services - CenterPoint Energy	11		11
	Seconded Employee Costs - OGE Energy (2)	31		—
	Corporate Services - OGE Energy (2)	6		—
	Total corporate services and seconded employees expense	$	86	$	11
	_________________________
	-1	Beginning on May 1, 2013, CenterPoint Energy assumed all employees of the Partnership and seconded such employees to the Partnership. Therefore, costs historically incurred directly by the Partnership for employment services are reflected as seconded employee costs subsequent to formation on May 1, 2013.
	-2	Corporate services and seconded employee expenses from OGE Energy are reflected in the Condensed Combined and Consolidated Statement of Income beginning on May 1, 2013.

Income_Taxes_Tables

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Schedule of Components of Income Tax Expense (Benefit)	'
	The items comprising income tax expense are as follows:
		Three Months Ended
		March 31,
		2014		2013
		(In millions)
	Provision (Benefit) for Current Income Taxes
	Federal	$	—	$	(1	)
	State	1		—
	Total Provision (Benefit) for Current Income Taxes	1		(1		)
	Provision (Benefit) for Deferred Income Taxes, net
	Federal	$	—	33
	State	—		5
	Total Provision (Benefit) for Deferred Income Taxes, net	—		38
	Total Income Tax Expense (Benefit)	$	1	$	37

Report_of_Business_Segments_Ta

Report of Business Segments (Tables)	3 Months Ended
	Mar. 31, 2014
Segment Reporting [Abstract]	'
Schedule of Financial Data for Business Segments and Services	'
	Financial data for business segments and services are as follows:
	Three Months Ended March 31, 2014	Gathering  and		Transportation		Eliminations			Total
		Processing		and Storage(1)
		(In millions)
	Revenues	$	671	$	528	$	(197	)	$	1,002
	Cost of goods sold, excluding depreciation and amortization	464		366		(197		)	633
	Operation and maintenance	69		57		—			126
	Depreciation and amortization	38		29		—			67
	Taxes other than income	4		10		—			14
	Operating income	$	96	$	66	$	—		$	162
	Total assets	$	7,306	$	5,718	$	(1,766	)	$	11,258
	Capital expenditures	$	129	$	21	$	(1	)	$	149
	Three Months Ended March 31, 2013	Gathering and		Transportation		Eliminations			Total
		Processing		and Storage(1)
		(In millions)
	Revenues	$	142	$	132	$	(13	)	$	261
	Cost of goods sold, excluding depreciation and amortization	38		19		(12		)	45
	Operation and maintenance	31		39		(1		)	69
	Depreciation and amortization	15		15		—			30
	Taxes other than income	2		7		—			9
	Operating income	$	56	$	52	$	—		$	108
	Total assets as of December 31, 2013	$	7,157	$	5,717	$	(1,642	)	$	11,232
	Capital expenditures	$	16	$	29	$	—		$	45
	_____________________
	-1	Transportation and storage recorded equity income of $3 million and $5 million for the three months ended March 31, 2014 and 2013, respectively, from its interest in SESH, a jointly-owned pipeline. These amounts are included in Equity in earnings of equity method affiliates under the Other Income (Expense) caption. Transportation and Storage’s investment in SESH was $199 million and $198 million as of March 31, 2014 and December 31, 2013, respectively, and is included in Investments in equity method affiliates. The Partnership reflected a 50% interest in SESH until May 1, 2013 when the Partnership distributed a 25.05% interest in SESH to CenterPoint Energy. See Note 6 for further discussion regarding SESH.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Narrative (Details) (USD $)

0 Months Ended

3 Months Ended

0 Months Ended

3 Months Ended

In Millions, except Share data, unless otherwise specified

Mar. 25, 2014

1-May-13

Mar. 31, 2014

Mar. 31, 2013

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

1-May-13

2-May-13

Mar. 31, 2014

Apr. 30, 2013

2-May-13

CenterPoint

OGE Energy

ArcLight

SESH

Enogex

Atoka

SESH

SESH

CenterPoint

Limited partner ownership interest

'

'

'

'

58.30%

28.50%

13.20%

'

'

50.00%

'

'

Minimum percentage of vote required by all unitholders

'

'

75.00%

'

'

'

'

'

'

'

'

'

Percentage share of management rights

'

'

'

'

50.00%

50.00%

'

'

'

'

'

'

Percentage share of incentive distribution rights

'

'

'

'

40.00%

60.00%

'

'

'

'

'

'

Income tax benefit

'

$1,240

$1

$37

'

'

'

'

'

'

'

'

Ownership percentage

'

'

'

'

'

'

'

'

100.00%

'

50.00%

'

Distributed ownership percentage

'

'

'

'

'

'

'

'

'

'

'

25.05%

Limited partner units that may be issued, exercisable as early as May 2014

'

'

'

'

'

'

'

6,322,457

'

'

'

'

Limited partner units that may be issued, exercisable as early as May 2015

'

'

'

'

'

'

'

25,341

'

'

'

'

Limited partner ownership interest, exercisable as early as May 2014

'

'

'

'

'

'

'

24.95%

'

'

'

'

Limited partner ownership interest, exercisable as early as May 2015

'

'

'

'

'

'

'

0.10%

'

'

'

'

Conversion ratio

1.279082616

'

'

'

'

'

'

'

'

'

'

'

Acquisition_of_Enogex_Schedule

Acquisition of Enogex - Schedule of Assets and Liabilities Assumed (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	1-May-13	1-May-13	1-May-13	1-May-13	Mar. 31, 2014
In Millions, except Share data, unless otherwise specified			Enogex	CenterPoint	OGE Energy	ArcLight	Weighted Average [Member]
				Partners’ Capital	Partners’ Capital	Partners’ Capital	Enogex
Business Acquisition [Line Items]	'	'	'	'	'	'	'
Units outstanding	'	'	'	227,508,825	110,982,805	51,527,730	'
Percentage of interest acquired	'	'	100.00%	'	'	'	'
Useful life of property, plant and equipment	'	'	'	'	'	'	'32 years
Assets	'	'	'	'	'	'	'
Current Assets	'	'	$192	'	'	'	'
Property, plant and equipment	'	'	3,919	'	'	'	'
Goodwill	1,068	1,068	439	'	'	'	'
Other intangible assets	'	'	401	'	'	'	'
Other assets	'	'	21	'	'	'	'
Total assets	'	'	4,972	'	'	'	'
Liabilities	'	'	'	'	'	'	'
Current liabilities	'	'	393	'	'	'	'
Long-term debt	'	'	745	'	'	'	'
Other liabilities	'	'	20	'	'	'	'
Total liabilities	'	'	1,158	'	'	'	'
Less: Noncontrolling interest at fair value	'	'	26	'	'	'	'
Fair value of consideration transferred	'	'	$3,788	'	'	'	'

Acquisition_of_Enogex_Pro_Form

Acquisition of Enogex - Pro Forma Information (Details) (Enogex, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013
Enogex	'
Business Acquisition [Line Items]	'
Pro forma revenues	$726
Pro forma operating income	120
Pro forma net income	75
Pro forma net income attributable to Enable Midstream Partners, LP	$75

Intangible_Assets_Net_Narrativ

Intangible Assets, Net - Narrative (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Amortization of intangible assets	$7

Investment_in_Equity_Method_Af1

Investment in Equity Method Affiliates - Narrative (Details)	0 Months Ended
	1-May-13	Apr. 30, 2013	2-May-13
	SESH	SESH	SESH
		mi	CenterPoint
Ownership percentage	'	50.00%	'
Interstate natural gas pipeline length	'	289	'
Distributed ownership percentage	'	'	25.05%
Limited partner ownership interest, exercisable as early as May 2014	24.95%	'	'
Limited partner units that may be issued, exercisable as early as May 2014	6,322,457	'	'
Limited partner units that may be issued, exercisable as early as May 2015	25,341	'	'
Limited partner ownership interest, exercisable as early as May 2015	0.10%	'	'

Investment_in_Equity_Method_Af2

Investment in Equity Method Affiliates - Schedule of Investments (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Investment in Equity Method Affiliates:	'	'	'
Equity method investments	$199	'	$198
Equity in Earnings of Equity Method Affiliates:	'	'	'
Equity in earnings of unconsolidated affiliates	3	5	'
SESH	'	'	'
Distributions from Equity Method Affiliates:	'	'	'
Distributions from unconsolidated affiliates	3	9	'
Operating revenues	27	27	'
Operating income	17	15	'
Net income	12	10	'
Other Income (Expense) [Member] | SESH	'	'	'
Equity in Earnings of Equity Method Affiliates:	'	'	'
Equity in earnings of unconsolidated affiliates	3	5	'
Investments in Equity Method Affiliates [Member] | SESH	'	'	'
Investment in Equity Method Affiliates:	'	'	'
Equity method investments	$199	'	$198

Debt_Narrative_Details

Debt - Narrative (Details) (USD $)

Mar. 31, 2014

Jan. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Mar. 31, 2014

Dec. 31, 2013

Senior Notes

Senior Notes

Senior Notes

Term Loan

Term Loan

Term Loan

Term Loan

Revolving Credit Facility

Other Assets [Member]

Other Assets [Member]

6.875% Senior Notes

6.25% Senior Notes

Enable Oklahoma Term Loan

LIBOR

LIBOR

Enable Oklahoma Term Loan

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Maximum Borrowing Capacity

'

'

'

'

'

'

$1,050,000,000

$250,000,000

'

'

$1,400,000,000

'

'

Debt Instrument, Term

'

'

'

'

'

'

'3 years

'

'

'

'5 years

'

'

Letters of credit principal advances

'

'

'

'

'

'

'

'

'

'

0

'

'

Letters of credit outstanding amount

'

'

'

'

'

'

'

'

'

'

2,000,000

'

'

Debt Instrument, Basis Spread on Variable Rate

'

'

'

'

'

'

'

'

1.63%

1.50%

1.63%

'

'

Line of Credit Facility, Unused Capacity, Commitment Fee Percentage

'

'

'

'

'

'

'

'

'

'

0.25%

'

'

Commercial Paper, Authorized

'

1,400,000,000

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Face Amount

'

'

'

'

200,000,000

250,000,000

'

'

'

'

'

'

'

Commercial Paper, at Carrying Value

433,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Fixed interest rate

'

'

'

'

6.88%

6.25%

'

'

'

'

'

'

'

Debt Instrument, Unamortized Premium

'

'

37,000,000

34,000,000

2,000,000

32,000,000

'

'

'

'

'

'

'

Unamortized Debt Issuance Expense

'

'

'

'

'

'

'

'

'

'

'

$9,000,000

$9,000,000

Fair_Value_Measurements_Carryi

Fair Value Measurements - Carrying and Fair Value Amounts (Details) (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Long-Term Debt, Carrying Amount	$1,582		$1,916
Commercial Paper, at Carrying Value	433		'
Current portion of long-term debt	202		204
Enable Oklahoma Senior Notes	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Current portion of long-term debt	202		'
Carrying Amount | Level 2 | Long-Term Notes Payable | Affiliated Companies	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Long-Term Debt, Carrying Amount	363		363
Carrying Amount | Level 2 | Revolving Credit Facility	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Long-Term Debt, Carrying Amount	0	[1]	333	[1]
Carrying Amount | Level 2 | Term Loan	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Long-Term Debt, Carrying Amount	1,050		1,050
Carrying Amount | Level 2 | Enable Oklahoma Term Loan	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Long-Term Debt, Carrying Amount	250		250
Carrying Amount | Level 2 | Enable Oklahoma Senior Notes	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Long-Term Debt, Carrying Amount	484	[2]	487	[2]
Fair Value | Level 2 | Long-Term Notes Payable | Affiliated Companies	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Long-Term Debt, Fair Value	365		363
Fair Value | Level 2 | Revolving Credit Facility	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Long-Term Debt, Fair Value	0	[1]	333	[1]
Fair Value | Level 2 | Term Loan	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Long-Term Debt, Fair Value	1,050		1,050
Fair Value | Level 2 | Enable Oklahoma Term Loan	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Long-Term Debt, Fair Value	250		250
Fair Value | Level 2 | Enable Oklahoma Senior Notes	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Long-Term Debt, Fair Value	$475	[2]	$477	[2]
[1]	Borrowing capacity is reduced by our borrowings outstanding under the commercial paper program, which were $433 million as of March 31, 2014.
[2]	Includes $202 million of current portion as of March 31, 2014.

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Value Hierarchy (Details) (USD $)	Mar. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Fuel Reserves for Under Retained Fuel Due From Shippers	$9		$2
Fuel Reserves For Over Retained Fuel Due To Shippers	4		3
Recurring Measurement | Level 2	'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'
Gas Imbalance Asset	16	[1],[2]	8	[1],[2]
Gas Imbalance Liability	$18	[2],[3]	$10	[2],[3]
[1]	Gas imbalance assets exclude fuel reserves for under retained fuel due from shippers of $9 million and $2 million at March 31, 2014 and December 31, 2013, 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 Enable Oklahoma 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, 2014 and December 31, 2013.
[3]	Gas imbalance liabilities exclude fuel reserves for over retained fuel due to shippers of $4 million and $3 million at March 31, 2014 and December 31, 2013, 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.

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Related Party Transaction [Line Items]	'	'	'
Partnership's revenues from affiliated companies as a percent of total revenues	6.00%	15.00%	'
Charges to the Partnership by affiliates	$86,000,000	$11,000,000	'
Notes payable—affiliated companies	363,000,000	'	363,000,000
Interest income—affiliated companies	0	7,000,000	'
OGE Energy	'	'	'
Related Party Transaction [Line Items]	'	'	'
Period notice of termination prior to commencement of succeeding annual period	'180 days	'	'
OGE Energy | Certain Services and Support Functions	'	'	'
Related Party Transaction [Line Items]	'	'	'
Expense reimbursement annual caps	28,000,000	'	'
OGE Energy | Allocated costs charged	'	'	'
Related Party Transaction [Line Items]	'	'	'
Charges to the Partnership by affiliates	1,000,000	'	'
CenterPoint	'	'	'
Related Party Transaction [Line Items]	'	'	'
Affiliate interest expense	2,000,000	24,000,000	'
Interest income—affiliated companies	0	7,000,000	'
CenterPoint | 2.10% Note Payable	'	'	'
Related Party Transaction [Line Items]	'	'	'
Notes payable—affiliated companies	273,000,000	'	273,000,000
CenterPoint | 2.10% Note Payable | Long-Term Notes Payable	'	'	'
Related Party Transaction [Line Items]	'	'	'
Fixed interest rate	2.10%	'	2.10%
CenterPoint | 2.45% Note Payable	'	'	'
Related Party Transaction [Line Items]	'	'	'
Notes payable—affiliated companies	90,000,000	'	90,000,000
CenterPoint | 2.45% Note Payable | Long-Term Notes Payable	'	'	'
Related Party Transaction [Line Items]	'	'	'
Fixed interest rate	2.45%	'	2.45%
CenterPoint | Certain Services and Support Functions	'	'	'
Related Party Transaction [Line Items]	'	'	'
Expense reimbursement annual caps	38,000,000	'	'
CenterPoint | Allocated costs charged	'	'	'
Related Party Transaction [Line Items]	'	'	'
Charges to the Partnership by affiliates	$3,000,000	'	'
CenterPoint and OGE Energy	'	'	'
Related Party Transaction [Line Items]	'	'	'
Period notice of termination for reimbursements for all employee costs	'90 days	'	'

Related_Party_Activity_Details

Related Party Activity (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Related Party Transaction [Line Items]	'		'
Revenues from affiliated companies	$65		$39
Cost of goods sold from affiliate	4		0
Charges to the Partnership by affiliates	86		11
CenterPoint	'		'
Related Party Transaction [Line Items]	'		'
Cost of goods sold from affiliate	1		0
CenterPoint | Gas Transportation and Storage	'		'
Related Party Transaction [Line Items]	'		'
Revenues from affiliated companies	33		32
CenterPoint | Gas Sales	'		'
Related Party Transaction [Line Items]	'		'
Revenues from affiliated companies	15		7
CenterPoint | Seconded Employee Costs	'		'
Related Party Transaction [Line Items]	'		'
Charges to the Partnership by affiliates	38	[1]	0	[1]
CenterPoint | Corporate Services	'		'
Related Party Transaction [Line Items]	'		'
Charges to the Partnership by affiliates	11		11
OGE Energy	'		'
Related Party Transaction [Line Items]	'		'
Cost of goods sold from affiliate	3		0
OGE Energy | Gas Transportation and Storage	'		'
Related Party Transaction [Line Items]	'		'
Revenues from affiliated companies	12	[2]	0	[2]
OGE Energy | Gas Sales	'		'
Related Party Transaction [Line Items]	'		'
Revenues from affiliated companies	5	[2]	0	[2]
OGE Energy | Seconded Employee Costs	'		'
Related Party Transaction [Line Items]	'		'
Charges to the Partnership by affiliates	31	[3]	0	[3]
OGE Energy | Corporate Services	'		'
Related Party Transaction [Line Items]	'		'
Charges to the Partnership by affiliates	$6	[3]	$0	[3]
[1]	Beginning on May 1, 2013, CenterPoint Energy assumed all employees of the Partnership and seconded such employees to the Partnership. Therefore, costs historically incurred directly by the Partnership for employment services are reflected as seconded employee costs subsequent to formation on May 1, 2013.
[2]	The Partnership's contracts with OGE Energy to transport and sell natural gas to OGE Energy’s natural gas-fired generation facilities and store natural gas are reflected in Partnership’s Condensed Combined and Consolidated Statement of Income beginning on May 1, 2013. On March 17, 2014, the Partnership and the electric utility subsidiary of OGE Energy signed a new transportation agreement effective May 1, 2014 with a primary term 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.
[3]	Corporate services and seconded employee expenses from OGE Energy are reflected in the Condensed Combined and Consolidated Statement of Income beginning on May 1, 2013.

Income_Taxes_Schedule_of_Expen

Income Taxes - Schedule of Expense (Benefit) (Details) (USD $)	0 Months Ended	3 Months Ended
In Millions, unless otherwise specified	1-May-13	Mar. 31, 2014	Mar. 31, 2013
Provision (Benefit) for Current Income Taxes	'	'	'
Federal	'	$0	($1)
State	'	1	0
Total Provision (Benefit) for Current Income Taxes	'	1	-1
Provision (Benefit) for Deferred Income Taxes, net	'	'	'
Federal	'	0	33
State	'	0	5
Total Provision (Benefit) for Deferred Income Taxes, net	'	0	38
Total Income Tax Expense (Benefit)	$1,240	$1	$37

Schedule_of_Financial_Data_for

- Schedule of Financial Data for Business Segments and Services (Details) (USD $)

3 Months Ended

3 Months Ended

3 Months Ended

3 Months Ended

3 Months Ended

In Millions, unless otherwise specified

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2013

Apr. 30, 2013

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2013

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2013

Mar. 31, 2014

Mar. 31, 2013

Dec. 31, 2013

2-May-13

Mar. 31, 2014

Mar. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

SESH

Gathering and Processing

Gathering and Processing

Gathering and Processing

Transportation and Storage

Transportation and Storage

Transportation and Storage

Eliminations

Eliminations

Eliminations

CenterPoint

Other Income (Expense) [Member]

Other Income (Expense) [Member]

Investments in Equity Method Affiliates [Member]

Investments in Equity Method Affiliates [Member]

SESH

SESH

SESH

SESH

SESH

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenues

$1,002

$261

'

'

$671

$142

'

$528

[1]

$132

[1]

'

($197)

($13)

'

'

'

'

'

'

Cost of goods sold, excluding depreciation and amortization

633

45

'

'

464

38

'

366

[1]

19

[1]

'

-197

-12

'

'

'

'

'

'

Operation and maintenance

126

69

'

'

69

31

'

57

39

'

0

-1

'

'

'

'

'

'

Depreciation and amortization

67

30

'

'

38

15

'

29

[1]

15

[1]

'

0

0

'

'

'

'

'

'

Taxes other than income

14

9

'

'

4

2

'

10

7

'

0

0

'

'

'

'

'

'

Operating income (loss)

162

108

'

'

96

56

'

66

[1]

52

[1]

'

0

0

'

'

'

'

'

'

Total assets

11,258

'

11,232

'

7,306

'

7,157

5,718

[1]

'

5,717

[1]

-1,766

'

-1,642

'

'

'

'

'

Capital expenditures

149

45

'

'

129

16

'

21

[1]

29

[1]

'

-1

0

'

'

'

'

'

'

Equity in earnings of equity method affiliates

3

5

'

'

'

'

'

'

'

'

'

'

'

'

3

5

'

'

Investment in equity method affiliates

$199

'

$198

'

'

'

'

'

'

'

'

'

'

'

'

'

$199

$198

Ownership percentage

'

'

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Distributed ownership percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

25.05%

'

'

'

'

[1]

Transportation and storage recorded equity income of $3 million and $5 million for the three months ended March 31, 2014 and 2013, respectively, from its interest in SESH, a jointly-owned pipeline. These amounts are included in Equity in earnings of equity method affiliates under the Other Income (Expense) caption. Transportation and Storage’s investment in SESH was $199 million and $198 million as of March 31, 2014 and December 31, 2013, respectively, and is included in Investments in equity method affiliates. The Partnership reflected a 50% interest in SESH until May 1, 2013 when the Partnership distributed a 25.05% interest in SESH to CenterPoint Energy. See Note 6 for further discussion regarding SESH.

Subsequent_Events_Narrative_De

Subsequent Events - Narrative (Details) (USD $)	3 Months Ended		0 Months Ended						0 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2014	14-May-14	Apr. 16, 2014	Apr. 16, 2014	Apr. 16, 2014	Apr. 16, 2014	Apr. 16, 2014	Apr. 16, 2014
	CenterPoint	OGE Energy	Subsequent Event	Subsequent Event	Subsequent Event	Subsequent Event	Subsequent Event	Subsequent Event	Subsequent Event
				IPO	IPO	IPO	IPO	IPO	Over-Allotment Option
				Common Unit	Common Unit	Common Unit	Subordinated Unit	Subordinated Unit	Common Unit
					CenterPoint	OGE Energy	CenterPoint	OGE Energy
Subsequent Event [Line Items]	'	'	'	'	'	'	'	'	'
Distribution made to unitholders	'	'	$155	'	'	'	'	'	'
Common units issued during period (in shares)	'	'	'	25,000,000	'	'	'	'	3,750,000
Initial public offering price (in dollars per share)	'	'	'	$20	'	'	'	'	'
Net proceeds from sale of common units, net of underwriting discounts, commissions, and other related expenses	'	'	'	$465	'	'	'	'	'
Conversion of stock, common units converted (in shares)	'	'	'	'	139,704,916	68,150,514	'	'	'
Units outstanding	'	'	'	'	87,803,909	42,832,291	139,704,916	68,150,514	'
Limited partner ownership interest	58.30%	28.50%	'	'	'	'	'	'	'