Oncor Electric Delivery 10-Q 31 Oct 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 30, 2014
Entity Registrant Name	'ONCOR ELECTRIC DELIVERY CO LLC	'
Entity Central Index Key	'0001193311	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-14	'
Amendment Flag	'false	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	0
Oncor's Management and Board of Directors [Member]	'	'
Entity Outstanding Membership Interests	'	0.22%
Oncor Electric Delivery Holdings Company LLC [Member]	'	'
Entity Outstanding Membership Interests	'	80.03%
Texas Transmission and Investment LLC [Member]	'	'
Entity Outstanding Membership Interests	'	19.75%

Condensed_Statements_of_Consol

Condensed Statements of Consolidated Income (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Operating revenues:	'	'	'	'
Nonaffiliates	$773	$693	$2,137	$1,912
Affiliates	281	273	746	728
Total operating revenues	1,054	966	2,883	2,640
Operating expenses:	'	'	'	'
Wholesale transmission service	193	146	557	417
Operation and maintenance	183	169	517	502
Depreciation and amortization	218	207	638	608
Provision in lieu of income taxes (Note 10)	98	93	221	190
Taxes other than amounts related to income taxes	115	112	330	315
Total operating expenses	807	727	2,263	2,032
Operating income	247	239	620	608
Other income and deductions:	'	'	'	'
Other income (Note 11)	3	4	10	14
Other deductions (Note 11)	4	2	11	11
Nonoperating provision in lieu of income taxes	'	1	1	1
Interest income	1	'	3	2
Interest expense and related charges (Note 11)	89	94	266	283
Net income	$158	$146	$355	$329

Condensed_Statements_of_Consol1

Condensed Statements of Consolidated Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Condensed Statements of Consolidated Comprehensive Income [Abstract]	'	'	'	'
Net income	$158	$146	$355	$329
Other comprehensive income (loss):	'	'	'	'
Cash flow hedges - derivative value net loss recognized in net income (net of tax expense of $-, $-, $1 and $1) (Note 1)	1	1	2	3
Defined benefit pension plans (net of tax benefit of $-, $-, $- and $-) (Note 9)	-1	'	-1	-1
Total other comprehensive income (loss)	'	1	1	2
Comprehensive income	$158	$147	$356	$331

Recovered_Sheet1

Condensed Statements Of Consolidated Comprehensive Income (Parenthetical) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Condensed Statements of Consolidated Comprehensive Income [Abstract]	'	'
Cash flow hedges - derivative value net loss recognized in net income, tax benefit	$1	$1

Recovered_Sheet2

Condensed Statements Of Consolidated Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Cash flows - operating activities:	'	'
Net income	$355	$329
Adjustments to reconcile net income to cash provided by operating activities:	'	'
Depreciation and amortization	669	634
Provision in lieu of deferred income taxes - net	-36	143
Other - net	-2	-3
Changes in operating assets and liabilities:	'	'
Deferred revenues (Note 4)	-20	-19
Changes in other operating assets and liabilities	-101	-174
Cash provided by operating activities	865	910
Cash flows - financing activities:	'	'
Issuance of long-term debt (Note 6)	250	100
Repayments of long-term debt (Note 6)	-89	-84
Net increase in short-term borrowings (Note 5)	-25	125
Distributions to members (Note 8)	-181	-215
Debt discount, premium, financing and reacquisition expenses - net	-4	2
Cash used in financing activities	-49	-72
Cash flows - investing activities:	'	'
Capital expenditures	-822	-870
Other - net	-4	4
Cash used in investing activities	-826	-866
Net change in cash and cash equivalents	-10	-28
Cash and cash equivalents - beginning balance	27	45
Cash and cash equivalents - ending balance	$17	$17

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Current assets:	'		'
Cash and cash equivalents	$17		$27
Restricted cash - Bondco (Note 11)	67		52
Trade accounts receivable from nonaffiliates - net (Note 11)	469		385
Trade accounts and other receivables from affiliates - net (Note 10)	152		135
Amounts receivable from members related to income taxes (Note 10)	'		23
Materials and supplies inventories - at average cost	76		65
Prepayments and other current assets	86		79
Total current assets	867		766
Restricted cash - Bondco (Note 11)	16		16
Investments and other property (Note 11)	96		91
Property, plant and equipment - net (Note 11)	12,270		11,902
Goodwill (Note 11)	4,064		4,064
Other noncurrent assets	69		71
Total assets	18,493		18,234
Current liabilities:	'		'
Short-term borrowings (Note 5)	720		745
Trade accounts payable to nonaffiliates	133		178
Amounts payable to members related to income taxes (Note 10)	65		23
Accrued taxes other than amounts related to income	145		169
Accrued interest	65		95
Other current liabilities	150		135
Total current liabilities	1,914		1,476
Long-term debt, less amounts due currently (Note 6)	5,041		5,381
Liability in lieu of deferred income taxes (Note 10)	2,376		2,414
Other noncurrent liabilities and deferred credits (Note 11)	1,578		1,554
Total liabilities	10,909		10,825
Commitments and contingencies (Note 7)	'		'
Membership interests (Note 8):	'		'
Capital account - number of interests outstanding 2014 and 2013 - 635,000,000	7,631		7,457
Accumulated other comprehensive loss	-47		-48
Total membership interests	7,584		7,409
Total liabilities and membership interests	18,493		18,234
Oncor [Member]	'		'
Current assets:	'		'
Regulatory assets - net (Note 4)	975		1,098
Current liabilities:	'		'
Long-term debt due currently (Note 6)	500	[1]	'
Long-term debt, less amounts due currently (Note 6)	4,955	[1]	5,202	[1]
Bondco [Member]	'		'
Current assets:	'		'
Regulatory assets - net (Note 4)	136		226
Current liabilities:	'		'
Long-term debt due currently (Note 6)	136	[2]	131	[2]
Long-term debt, less amounts due currently (Note 6)	$86	[2]	$179	[2]
[1]	Secured by first priority lien on certain transmission and distribution assets equally and ratably with all of Oncor’s other secured indebtedness. See “Deed of Trust” in Note 6 to Financial Statements in our 2013 Form 10-K for additional information.
[2]	The transition bonds are nonrecourse to Oncor and were issued to securitize a regulatory asset.

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical)	Sep. 30, 2014	Dec. 31, 2013
Condensed Consolidated Balance Sheets [Abstract]	'	'
Capital account, interests outstanding	635,000,000	635,000,000

Business_and_Significant_Accou

Business and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2014
Business and Significant Accounting Policies [Abstract]	'
BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES	'
	1.    BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES
	Description of Business
	References in this report to “we,” “our,” “us” and “the company” are to Oncor and/or its subsidiary as apparent in the context.  See “Glossary” for definition of terms and abbreviations.
	We are a regulated electricity transmission and distribution company principally engaged in providing delivery services to REPs, including subsidiaries of TCEH, that sell power in the north-central, eastern and western parts of Texas.  Revenues from TCEH represented 26% and 28% of our total operating revenues for the nine months ended September 30, 2014 and 2013, respectively.  We are a direct, majority-owned subsidiary of Oncor Holdings, which is a direct, wholly-owned subsidiary of EFIH, a direct, wholly-owned subsidiary of EFH Corp.  EFH Corp. is a subsidiary of Texas Holdings, which is controlled by the Sponsor Group.  Oncor Holdings owns 80.03% of our membership interests, Texas Transmission owns 19.75% of our membership interests and certain members of our management team and board of directors indirectly own the remaining membership interests through Investment LLC.  We are managed as an integrated business; consequently, there are no separate reportable business segments.
	Our consolidated financial statements include our wholly-owned, bankruptcy-remote financing subsidiary, Bondco, a variable interest entity.  This financing subsidiary was organized for the limited purpose of issuing certain transition bonds in 2003 and 2004.  Bondco issued $1.3 billion principal amount of transition bonds to recover generation-related regulatory asset stranded costs and other qualified costs under an order issued by the PUCT in 2002.
	Various “ring-fencing” measures have been taken to enhance the separateness between the Oncor Ring-Fenced Entities and the Texas Holdings Group and our credit quality.  These measures serve to mitigate our and Oncor Holdings’ credit exposure to the Texas Holdings Group and to reduce the risk that our assets and liabilities or those of Oncor Holdings would be substantively consolidated with the assets and liabilities of the Texas Holdings Group in connection with a bankruptcy of one or more of those entities.  Such measures include, among other things: our sale of a 19.75% equity interest to Texas Transmission in November 2008; maintenance of separate books and records for the Oncor Ring-Fenced Entities; our board of directors being comprised of a majority of independent directors; and prohibitions on the Oncor Ring-Fenced Entities providing credit support to, or receiving credit support from, any member of the Texas Holdings Group.  The assets and liabilities of the Oncor Ring-Fenced Entities are separate and distinct from those of the Texas Holdings Group, including TXU Energy and Luminant, and none of the assets of the Oncor Ring-Fenced Entities are available to satisfy the debt or contractual obligations of any member of the Texas Holdings Group.  We do not bear any liability for debt or contractual obligations of the Texas Holdings Group, and vice versa.  Accordingly, our operations are conducted, and our cash flows are managed, independently from the Texas Holdings Group.
	EFH Corp. Bankruptcy Proceedings
	On the EFH Petition Date, EFH Corp. and the substantial majority of its direct and indirect subsidiaries that are members of the Texas Holdings Group, including EFIH, EFCH and TCEH, commenced proceedings under Chapter 11 of the US Bankruptcy Code.  The Oncor Ring-Fenced Entities are not parties to the EFH Bankruptcy Proceedings.  We believe the “ring-fencing” measures discussed above mitigate our potential exposure to the EFH Bankruptcy Proceedings.  See Note 2 for a discussion of the potential impacts of the EFH Bankruptcy Proceedings on our financial statements.
	Basis of Presentation
	Our condensed consolidated financial statements have been prepared in accordance with US GAAP and on the same basis as the audited financial statements in our 2013 Form 10-K.  Adjustments (consisting of normal recurring accruals) necessary for a fair presentation of the results of operations and financial position have been included therein.  All intercompany items and transactions have been eliminated in consolidation.  Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with US GAAP have been omitted pursuant to the rules and regulations of the SEC.  Because the condensed consolidated interim financial statements do not include all of the information and footnotes required by US GAAP, they should be read in conjunction with the audited financial statements and related notes in our 2013 Form 10-K.  The results of operations for an interim period may not give a true indication of results for a full year due to seasonality.  All dollar amounts in the financial statements and tables in the notes are stated in millions of US dollars unless otherwise indicated.
	Use of Estimates
	Preparation of our financial statements requires management to make estimates and assumptions about future events that affect the reporting of assets and liabilities at the balance sheet dates and the reported amounts of revenue and expense, including fair value measurements.  In the event estimates and/or assumptions prove to be different from actual amounts, adjustments are made in subsequent periods to reflect more current information.
	Derivative Instruments and Mark-to-Market Accounting
	We have from time-to-time entered into derivative instruments to hedge interest rate risk.  If the instrument meets the definition of a derivative under accounting standards related to derivative instruments and hedging activities, the fair value of each derivative is recognized on the balance sheet as a derivative asset or liability and changes in the fair value are recognized in net income, unless criteria for certain exceptions are met.  This recognition is referred to as “mark-to-market” accounting.
	Reconcilable Tariffs
	The PUCT has designated certain tariffs (TCRF, EECRF surcharges, AMS surcharges and charges related to transition bonds) as reconcilable, which means the differences between amounts billed under these tariffs and the related incurred costs are deferred as either regulatory assets or regulatory liabilities.  Accordingly, at prescribed intervals, future tariffs are adjusted to either repay regulatory liabilities or collect regulatory assets.
	Contingencies
	We evaluate and account for contingencies using the best information available.  A loss contingency is accrued and disclosed when it is probable that an asset has been impaired or a liability incurred and the amount of the loss can be reasonably estimated.  If a range of probable loss is established, the minimum amount in the range is accrued, unless some other amount within the range appears to be a better estimate.  If the probable loss cannot be reasonably estimated, no accrual is recorded, but the loss contingency is disclosed to the effect that the probable loss cannot be reasonably estimated.  A loss contingency will be disclosed when it is reasonably possible that an asset has been impaired or a liability incurred.  If the likelihood that an impairment or incurrence is remote, the contingency is neither accrued nor disclosed.  Gain contingencies are recognized upon realization.
	Changes in Accounting Standards
	In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update No. 2014-09 (ASU 2014-09), Revenue from Contracts with Customers.  ASU 2014-09 introduces new, increased requirements for disclosure of revenue in financial statements and is intended to eliminate inconsistencies in revenue recognition and thereby improve financial reporting comparability across entities, industries and capital markets.  ASU 2014-09 is effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2016 for public entities.  Early application is not permitted.  We are currently evaluating the potential impact of ASU 2014-09.  The adoption of ASU 2014-09 is not expected to have a material effect on our reported results of operations, financial condition or cash flows.

EFH_Bankruptcy_Proceedings

EFH Bankruptcy Proceedings	9 Months Ended
	Sep. 30, 2014
EFH Bankruptcy Proceedings [Abstract]	'
EFH BANKRUPTCY PROCEEDINGS	'
	2.    EFH BANKRUPTCY PROCEEDINGS
	On the EFH Petition Date, EFH Corp. and the substantial majority of its direct and indirect subsidiaries that are members of the Texas Holdings Group, including EFIH, EFCH and TCEH, commenced proceedings under Chapter 11 of the US Bankruptcy Code.  The Oncor Ring-Fenced Entities are not parties to the EFH Bankruptcy Proceedings.  We believe the “ring-fencing” measures discussed above mitigate our potential exposure to the EFH Bankruptcy Proceedings.
	The US Bankruptcy Code automatically enjoined, or stayed, us from judicial or administrative proceedings or filing of other actions against our affiliates or their property to recover, collect or secure our claims arising prior to the EFH Petition Date.  Following the EFH Petition Date, EFH Corp. received approval from the bankruptcy court to pay or otherwise honor certain prepetition obligations generally designed to stabilize its operations.  Included in the approval were the obligations owed to us representing our prepetition electricity delivery fees.  As of the EFH Petition Date, we estimated that our receivables from the Texas Holdings Group totaled approximately $129 million.  Since that time, we have collected $127 million of the prepetition amount.  We estimate any potential pre-tax loss resulting from the EFH Bankruptcy Proceedings to be immaterial.  As such, a provision for uncollectible accounts from affiliates had not been established as of September 30, 2014.
	The EFH Bankruptcy Proceedings are a complex litigation matter and the full extent of potential exposure at this time is unknown.  Bankruptcy courts have broad equitable powers, and as a result, outcomes in bankruptcy proceedings are inherently difficult to predict.  We will continue to evaluate our affiliate transactions and contingencies throughout the EFH Bankruptcy Proceedings to determine any risks and resulting impacts on our financial statements.  EFH Corp. has been exploring various options regarding potential transactions that could be deemed to implicate a regulatory review.  We have made some preliminary preparations for potential change in control filings, including discussions with EFH Corp. and others, in light of the proposals in the EFH Bankruptcy Proceedings, but cannot predict the result of any transaction or review.
	See Note 10 for details of our related-party transactions with members of the Texas Holdings Group.

Regulatory_Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2014
Regulatory Matters [Abstract]	'
REGULATORY MATTERS	'
	3.    REGULATORY MATTERS
	2008 Rate Review
	In August 2009, the PUCT issued a final order with respect to our June 2008 rate review filing with the PUCT and 204 cities based on a test year ended December 31, 2007 (PUCT Docket No. 35717), and new rates were implemented in September 2009.  We and four other parties appealed various portions of the rate review final order to a state district court.  In January 2011, the district court signed its judgment reversing the PUCT with respect to two issues: the PUCT’s disallowance of certain franchise fees and the PUCT’s decision that PURA no longer requires imposition of a rate discount for state colleges and universities.  We filed an appeal with the Texas Third Court of Appeals (Austin Court of Appeals) in February 2011 with respect to the issues we appealed to the district court and did not prevail upon, as well as the district court’s decision to reverse the PUCT with respect to discounts for state colleges and universities.  On August 6, 2014, the Austin Court of Appeals reversed the district court and affirmed the PUCT with respect to the PUCT’s disallowance of certain franchise fees and the PUCT’s decision that PURA no longer requires imposition of a rate discount for state colleges and universities.  The Austin Court of Appeals also reversed the PUCT and district court’s rejection of a proposed consolidated tax savings adjustment arising out of EFH Corp.’s ability to offset our taxable income against losses from other investments.  The Austin Court of Appeals has remanded the issue to the PUCT to determine the amount of the consolidated tax savings adjustment.  On August 21, 2014, we filed a motion on rehearing with the Austin Court of Appeals with respect to certain appeal issues on which we were not successful, including the consolidated tax savings adjustment.  We are unable to predict the outcome of this motion on rehearing and our appeal efforts, and there is no deadline for the Austin Court of Appeals to act.  If our appeals efforts are unsuccessful and the proposed consolidated tax savings adjustment is implemented, we estimate that on remand, the impact on earnings of the consolidated tax savings adjustment’s value could range from zero, as originally determined by the PUCT in Docket 35717, to a $130 million loss (after tax).  We do not believe that any of the other issues ruled upon by the Austin Court of Appeals would result in a material impact to our results of operations or financial condition.
	See Note 2 to Financial Statements in our 2013 Form 10-K for additional information regarding regulatory matters.

Regulatory_Assets_and_Liabilit

Regulatory Assets and Liabilities	9 Months Ended
	Sep. 30, 2014
Regulatory Assets and Liabilities [Abstract]	'
REGULATORY ASSETS AND LIABILITIES	'
	4.    REGULATORY ASSETS AND LIABILITIES
	Recognition of regulatory assets and liabilities and the amortization periods over which they are expected to be recovered or refunded through rate regulation reflect the decisions of the PUCT.  Components of the regulatory assets and liabilities are provided in the table below.  Amounts not earning a return through rate regulation are noted.
			Remaining Rate Recovery/Amortization Period at		Carrying Amount At
			30-Sep-14		30-Sep-14		31-Dec-13
	Regulatory assets:
	Generation-related regulatory assets securitized by transition bonds (a)(e)		2 years		$	183	$	281
	Employee retirement costs		5 years			59		71
	Employee retirement costs to be reviewed (b)(c)		To be determined			241		224
	Employee retirement liability (a)(c)(d)		To be determined			520		491
	Self-insurance reserve (primarily storm recovery costs) ― net		5 years			135		158
	Self-insurance reserve to be reviewed ― net (b)(c)		To be determined			206		196
	Securities reacquisition costs (pre-industry restructure)		3 years			26		32
	Securities reacquisition costs (post-industry restructure) ― net		Terms of related debt			6		5
	Recoverable amounts in lieu of deferred		Life of related asset or liability			19		42
	income taxes ― net
	Rate review expenses (a)		Various			4		4
	Advanced meter customer education costs		5 years			7		8
	Deferred conventional meter and metering		Largely 6 years			129		146
	facilities depreciation
	Deferred AMS costs		To be determined			101		62
	Energy efficiency performance bonus (a)		1 year			25		12
	Under-recovered wholesale transmission		1 year			18		37
	service expense ― net (a)
	Other regulatory assets		Various			2		2
	Total regulatory assets					1,681		1,771
	Regulatory liabilities:
	Estimated net removal costs		Life of utility plant			495		385
	Investment tax credit and protected excess		Various			18		23
	deferred taxes
	Over-collection of transition bond revenues (a)(e)		2 years			37		35
	Energy efficiency programs (a)		Not applicable			20		4
	Total regulatory liabilities					570		447
	Net regulatory asset				$	1,111	$	1,324
	____________
		(a)		Not earning a return in the regulatory rate-setting process.
		(b)		Costs incurred since the period covered under the last rate review.
		(c)		Recovery is specifically authorized by statute or by the PUCT, subject to reasonableness review.
		(d)		Represents unfunded liabilities recorded in accordance with pension and OPEB accounting standards.
		(e)		Bondco net regulatory assets of $136 million at September 30, 2014 consisted of $173 million included in generation-related regulatory assets net of the regulatory liability for over-collection of transition bond revenues of $37 million.  Bondco net regulatory assets of $226 million at December 31, 2013 consisted of $261 million included in generation-related regulatory assets net of the regulatory liability for over-collection of transition bond revenues of $35 million.

Borrowings_Under_Credit_Facili

Borrowings Under Credit Facilities	9 Months Ended
	Sep. 30, 2014
Borrowings Under Credit Facilities And Long-Term Debt [Abstract]	'
BORROWINGS UNDER CREDIT FACILITIES	'
	5.    BORROWINGS UNDER CREDIT FACILITIES
	At September 30, 2014, we had a $2.4 billion secured revolving credit facility to be used for working capital and general corporate purposes, issuances of letters of credit and support for any commercial paper issuances.  The revolving credit facility expires in October 2016, and we have the option of requesting up to two one-year extensions, with such extensions subject to certain conditions and lender approval.  The terms of the revolving credit facility allow us to request an additional increase in our borrowing capacity of $100 million, provided certain conditions are met, including lender approval.
	Borrowings under the revolving credit facility are classified as short-term on the balance sheet and are secured equally and ratably with all of our other secured indebtedness by a first priority lien on property we acquired or constructed for the transmission and distribution of electricity.  The property is mortgaged under the Deed of Trust.
	At September 30, 2014, we had outstanding borrowings under the revolving credit facility totaling $720 million with an interest rate of 1.28% and outstanding letters of credit totaling $7 million.  At December 31, 2013, we had outstanding borrowings under the revolving credit facility totaling $745 million with an interest rate of 1.67% and outstanding letters of credit totaling $6 million.
	Borrowings under the revolving credit facility bear interest at per annum rates equal to, at our option, (i) LIBOR plus a spread ranging from 1.00% to 1.75% depending on credit ratings assigned to our senior secured non-credit enhanced long-term debt or (ii) an alternate base rate (the highest of (1) the prime rate of JPMorgan Chase, (2) the federal funds effective rate plus 0.50%, and (3) daily one-month LIBOR plus 1.00%) plus a spread ranging from 0.00% to 0.75% depending on credit ratings assigned to our senior secured non-credit enhanced long-term debt.  At September 30, 2014, all outstanding borrowings bore interest at LIBOR plus 1.125%.  Amounts borrowed under the revolving credit facility, once repaid, can be borrowed again from time to time.
	An unused commitment fee is payable quarterly in arrears and upon termination or commitment reduction at a rate equal to 0.100% to 0.275% (such spread depending on certain credit ratings assigned to our senior secured debt) of the daily unused commitments under the revolving credit facility.  Letter of credit fees on the stated amount of letters of credit issued under the revolving credit facility are payable to the lenders quarterly in arrears and upon termination at a rate per annum equal to the spread over adjusted LIBOR.  Customary fronting and administrative fees are also payable to letter of credit fronting banks.  At September 30, 2014, letters of credit bore interest at 1.325%, and a commitment fee (at a rate of 0.125% per annum) was payable on the unfunded commitments under the revolving credit facility, each based on our current credit ratings.
	Subject to the limitations described below, borrowing capacity available under the revolving credit facility at September 30, 2014 and December 31, 2013 was $1.673 billion and $1.649 billion, respectively.  Generally, our indentures and revolving credit facility limit the incurrence of other secured indebtedness except for indebtedness secured equally and ratably with the indentures and revolving credit facility and certain permitted exceptions.  As described further in Note 6 to Financial Statements in our 2013 Form 10-K, the Deed of Trust permits us to secure indebtedness (including borrowings under our revolving credit facility) with the lien of the Deed of Trust up to the aggregate of (i) the amount of available bond credits, and (ii) 85% of the lower of the fair value or cost of certain property additions that have been certified to the Deed of Trust collateral agent.  At September 30, 2014, the available bond credits were approximately $2.199 billion and the amount of additional potential indebtedness that could be secured by property additions, subject to a certification process, was $1.407 billion.  At September 30, 2014, the available borrowing capacity of the revolving credit facility could be fully drawn.
	The revolving credit facility contains customary covenants for facilities of this type, restricting, subject to certain exceptions, us and our subsidiaries from, among other things: incurring additional liens; entering into mergers and consolidations; and sales of substantial assets.  In addition, the revolving credit facility requires that we maintain a consolidated senior debt-to-capitalization ratio of no greater than 0.65 to 1.00 and observe certain customary reporting requirements and other affirmative covenants.  For purposes of the ratio, debt is calculated as indebtedness defined in the revolving credit facility (principally, the sum of long-term debt, any capital leases, short-term debt and debt due currently in accordance with US GAAP).  The debt calculation excludes transition bonds issued by Bondco, but includes the unamortized fair value discount related to Bondco.  Capitalization is calculated as membership interests determined in accordance with US GAAP plus indebtedness described above.  At September 30, 2014, we were in compliance with this covenant and with all other covenants.

LongTerm_Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2014
Borrowings Under Credit Facilities And Long-Term Debt [Abstract]	'
LONG-TERM DEBT	'
	6.    LONG-TERM DEBT
	At September 30, 2014 and December 31, 2013, our long-term debt consisted of the following:
		September 30,		December 31,
		2014		2013
	Oncor (a):
	6.375% Fixed Senior Notes due January 15, 2015	$	500	$	500
	5.000% Fixed Senior Notes due September 30, 2017		324		324
	6.800% Fixed Senior Notes due September 1, 2018		550		550
	2.150% Fixed Senior Notes due June 1, 2019		250		-
	5.750% Fixed Senior Notes due September 30, 2020		126		126
	4.100% Fixed Senior Notes due June 1, 2022		400		400
	7.000% Fixed Debentures due September 1, 2022		800		800
	7.000% Fixed Senior Notes due May 1, 2032		500		500
	7.250% Fixed Senior Notes due January 15, 2033		350		350
	7.500% Fixed Senior Notes due September 1, 2038		300		300
	5.250% Fixed Senior Notes due September 30, 2040		475		475
	4.550% Fixed Senior Notes due December 1, 2041		400		400
	5.300% Fixed Senior Notes due June 1, 2042		500		500
	Unamortized discount		-20		-23
	Less amount due currently		-500		-
	Long-term debt, less amounts due currently — Oncor		4,955		5,202
	Bondco (b):
	5.420% Fixed Series 2003 Bonds due in semiannual installments through August 15, 2015		54		106
	5.290% Fixed Series 2004 Bonds due in semiannual installments through May 15, 2016		168		205
	Unamortized fair value discount related to transition bonds		-		-1
	Less amount due currently		-136		-131
	Long-term debt, less amounts due currently — Bondco		86		179
	Total long-term debt, less amounts due currently	$	5,041	$	5,381
	__________
	(a)   Secured by first priority lien on certain transmission and distribution assets equally and ratably with all of Oncor’s other secured indebtedness.  See “Deed of Trust” in Note 6 to Financial Statements in our 2013 Form 10-K for additional information.
	(b)   The transition bonds are nonrecourse to Oncor and were issued to securitize a regulatory asset.
	Debt-Related Activity in 2014
	Debt Repayments
	Repayments of long-term debt in the nine months ended September 30, 2014 totaled $89 million and represent transition bond principal payments at scheduled maturity dates.
	Issuance of New Senior Secured Notes
	In May 2014, we issued $250 million aggregate principal amount of 2.150% senior secured notes maturing in June 2019 (Notes).  We used the proceeds (net of the initial purchasers’ discount, fees and expenses) of approximately $248 million from the sale of the Notes to repay borrowings under our revolving credit facility and for other general corporate purposes.  The Notes are secured by a first priority lien, and are secured equally and ratably with all of our other secured indebtedness.
	Interest on the Notes is payable in cash semiannually in arrears on June 1 and December 1 of each year, beginning on December 1, 2014.  We may at our option at any time and from time to time redeem all or part of the Notes at a price equal to 100% of their principal amount, plus accrued and unpaid interest and a make-whole premium.  The Notes also contain customary events of default, including failure to pay principal or interest on the Notes when due.
	The Notes were issued in a private placement and were not registered under the Securities Act.  We have agreed, subject to certain exceptions, to register with the SEC notes having substantially identical terms as the Notes (except for provisions relating to the transfer restriction and payment of additional interest) as part of an offer to exchange freely tradable exchange notes for the Notes.  We have agreed to use commercially reasonable efforts to cause the exchange offer to be completed within 315 days after the issue date of the Notes.  If a registration statement for the exchange offer is not declared effective by the SEC within 270 days after the issue date of the Notes or the exchange offer is not completed within 315 days after the issue date of the Notes (an exchange default), then the annual interest rate on the Notes will increase 50 basis points per annum until the earlier of the expiration of the exchange default or the second anniversary of the issue date of the Notes.
	Fair Value of Long-Term Debt
	At September 30, 2014 and December 31, 2013, the estimated fair value of our long-term debt (including current maturities) totaled $6.759 billion and $6.188 billion, respectively, and the carrying amount totaled $5.677 billion and $5.512 billion, respectively.  The fair value is estimated based upon the market value as determined by quoted market prices, representing Level 1 valuations under accounting standards related to the determination of fair value.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2014
Commitments and Contingencies [Abstract]	'
COMMITMENTS AND CONTINGENCIES	'
	7.    COMMITMENTS AND CONTINGENCIES
	EFH Bankruptcy Proceedings
	On the EFH Petition Date, EFH Corp. and the substantial majority of its direct and indirect subsidiaries that are members of the Texas Holdings Group, including EFIH, EFCH and TCEH, commenced proceedings under Chapter 11 of the US Bankruptcy Code.  The Oncor Ring-Fenced Entities are not parties to the EFH Bankruptcy Proceedings.  See Notes 2 and 10 for a discussion of the potential impacts on us as a result of the EFH Bankruptcy Proceedings and our related-party transactions involving members of the Texas Holdings Group, respectively.
	Guarantees
	We are the lessee under various operating leases that obligate us to guarantee the residual values of the leased assets.  At September 30, 2014, both the aggregate maximum amount of residual values guaranteed and the estimated residual recoveries totaled $6 million.  These leased assets consist primarily of vehicles used in distribution activities.  The average life of the residual value guarantees under the lease portfolio is approximately 2.4 years.
	Legal/Regulatory Proceedings
	We are involved in various legal and administrative proceedings in the normal course of business, the ultimate resolution of which, in the opinion of management, should not have a material effect upon our financial position, results of operations or cash flows.  See Note 3 in this report and Note 7 to Financial Statements in our 2013 Form 10-K for additional information regarding our legal and regulatory proceedings.

Membership_Interests

Membership Interests	9 Months Ended
	Sep. 30, 2014
Membership Interests [Abstract]	'
MEMBERSHIP INTERESTS	'
	8.    MEMBERSHIP INTERESTS
	Cash Distributions
	On October 21, 2014, our board of directors declared a cash distribution of $101 million, which was paid to our members on October 22, 2014.  During the nine months ended September 30, 2014, our board of directors declared, and we paid the following cash distributions to our members.
	Declaration Date		Payment Date	Amount
	30-Jul-14		31-Jul-14	$	71
	30-Apr-14		1-May-14		57
	19-Feb-14		20-Feb-14	$	53
	Distributions are limited by our required regulatory capital structure to be at or below the assumed debt-to-equity ratio established periodically by the PUCT for ratemaking purposes, which is currently set at 60% debt to 40% equity.  At September 30, 2014, our regulatory capitalization ratio was 58.7% debt and 41.3% equity.  The PUCT has the authority to determine what types of debt and equity are included in a utility’s debt-to-equity ratio.  For purposes of this ratio, debt is calculated as long-term debt plus unamortized gains on reacquired debt less unamortized issuance expenses, premiums and losses on reacquired debt.  The debt calculation excludes transition bonds issued by Bondco.  Equity is calculated as membership interests determined in accordance with US GAAP, excluding the effects of purchase accounting (which included recording the initial goodwill and fair value adjustments and the subsequent related impairments and amortization).  At September 30, 2014, $193 million was available for distribution to our members under the capital structure restriction.
	Membership Interests
	The following tables present the changes to membership interests during the nine months ended September 30, 2014 and 2013:
		Capital Accounts		Accumulated Other Comprehensive Income (Loss)		Total Membership Interests
	Balance at December 31, 2013	$	7,457	$	-48	$	7,409
	Net income		355		-		355
	Distributions		-181		-		-181
	Net effects of cash flow hedges (net of tax)				2		2
	Defined benefit pension plans (net of tax)		-		-1		-1
	Balance at September 30, 2014	$	7,631	$	-47	$	7,584
		Capital Accounts		Accumulated Other Comprehensive Income (Loss)		Total Membership Interests
	Balance at December 31, 2012	$	7,335	$	-31	$	7,304
	Net income		329		-		329
	Distributions		-215		-		-215
	Net effects of cash flow hedges (net of tax)				3		3
	Defined benefit pension plans (net of tax)		-		-1		-1
	Other		-1		-		-1
	Balance at September 30, 2013	$	7,448	$	-29	$	7,419
	Accumulated Other Comprehensive Income (Loss)
	The following tables present the changes to accumulated other comprehensive income (loss) for the nine months ended September 30, 2014 and 2013:
		Cash Flow Hedges – Interest Rate Swap		Defined Benefit Pension and OPEB Plans		Accumulated Other Comprehensive Income (Loss)
	Balance at December 31, 2013	$	-26	$	-22	$	-48
	Defined benefit pension plans (net of tax)		-		-1		-1
	Amounts reclassified from accumulated other comprehensive income (loss) and reported in interest expense and related charges		2		-		2
	Balance at September 30, 2014	$	-24	$	-23	$	-47
		Cash Flow Hedges – Interest Rate Swap		Defined Benefit Pension and OPEB Plans		Accumulated Other Comprehensive Income (Loss)
	Balance at December 31, 2012	$	-28	$	-3	$	-31
	Defined benefit pension plans (net of tax)		-		-1		-1
	Amounts reclassified from accumulated other comprehensive income (loss) and reported in interest expense and related charges		3		-		3
	Balance at September 30, 2013	$	-25	$	-4	$	-29

Pension_and_Other_Postretireme

Pension and Other Postretirement Employee Benefits Plans	9 Months Ended
	Sep. 30, 2014
Pension and Other Postretirement Employee Benefits Plans [Abstract]	'
PENSION AND OTHER POSTRETIREMENT EMPLOYEE BENEFITS PLANS	'
	9.    PENSION AND OTHER POSTRETIREMENT EMPLOYEE BENEFITS PLANS
	We participate in two defined pension plans, the Oncor Retirement Plan and the EFH Retirement Plan.  Until July 1, 2014, we also participated with EFH Corp. and other subsidiaries of EFH Corp. to offer certain health care and life insurance benefits to eligible employees and their eligible dependents upon the retirement of such employees (EFH OPEB Plan).  As discussed below, we ceased participation in the EFH OPEB Plan and established our own OPEB plan for our eligible employees and their dependents (Oncor OPEB Plan).  We also have a supplemental pension plan for certain employees whose retirement benefits cannot be fully earned under the qualified retirement plans.  See Note 9 to Financial Statements in our 2013 Form 10-K for additional information regarding our pension plans and the EFH OPEB Plan.
	In April 2014, we entered into an agreement with EFH Corp. in which we agreed to transfer to the Oncor OPEB Plan effective July 1, 2014, the assets and liabilities related to our eligible current and future retirees as well as retirees of EFH Corp. whose employment included service with both Oncor (or a predecessor regulated electric business) and a non-regulated business of EFH Corp.  Pursuant to the agreement, EFH Corp. will retain its portion of the liability for retiree benefits related to those retirees.  Since the Oncor OPEB Plan offers identical benefits as the EFH OPEB Plan and we and EFH Corp. retain the same responsibility for participants as before, there was no financial impact as a result of the transfer other than from a remeasurement of the Oncor OPEB Plan’s asset values and obligations.  As we are not responsible for EFH Corp.’s portion of the Oncor OPEB Plan’s unfunded liability totaling $104 million as of September 30, 2014, that amount is not reported on our balance sheet.
	As a result of the establishment of the Oncor OPEB Plan, asset values and obligations were remeasured as of July 1, 2014, resulting in the projected benefit obligation increasing by $75 million, or 8%, the fair value of assets decreasing by $3 million, or 2%, and regulatory assets increasing by $64 million, or 50%, as compared to December 31, 2013 values.  Assumptions used in the remeasurement included a decrease in the discount rate to 4.39% from 4.98% and no change in the expected return on assets of 7.05% assumed at December 31, 2013.  The remeasurement did not materially affect reported OPEB expense for the three months ended September 30, 2014.
	Our net costs related to pension and OPEB plans for the three and nine months ended September 30, 2014 and 2013 were comprised of the following:
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Components of net allocated pension costs:
	Service cost	$	6	$	6	$	18	$	18
	Interest cost		33		31		99		92
	Expected return on assets		-34		-31		-102		-91
	Amortization of net loss		9		17		29		52
	Net pension costs		14		23		44		71
	Components of net OPEB costs:
	Service cost		2		1		5		4
	Interest cost		11		9		33		28
	Expected return on assets		-3		-3		-9		-9
	Amortization of prior service cost		-5		-5		-15		-15
	Amortization of net loss		8		7		20		19
	Net OPEB costs		13		9		34		27
	Total net pension and OPEB costs		27		32		78		98
	Less amounts deferred principally as property or a regulatory asset		-18		-23		-51		-71
	Net amounts recognized as expense	$	9	$	9	$	27	$	27
	The discount rates reflected in net pension and OPEB costs in 2014 are 4.72%, 5.07% and 4.39% (as of July 1, 2014) for the Oncor Retirement Plan, the EFH Retirement Plan and the OPEB plans, respectively.  The expected return on pension and OPEB plan assets reflected in the 2014 cost amounts are 6.48%, 6.17% and 7.05% for the Oncor Retirement Plan, the EFH Retirement Plan and the OPEB plans, respectively.
	We made cash contributions to the pension plans and OPEB plans of $67 million and $12 million, respectively, during the nine months ended September 30, 2014, and we expect to make additional cash contributions to the pension plans and OPEB plans of $1 million and $5 million, respectively, during the remainder of 2014.

RelatedParty_Transactions

Related-Party Transactions	9 Months Ended
	Sep. 30, 2014
Related-Party Transactions [Abstract]	'
RELATED-PARTY TRANSACTIONS	'
	10.   RELATED-PARTY TRANSACTIONS
	The following represent our significant related-party transactions.  See Note 2 for additional information regarding related-party contingencies resulting from the EFH Bankruptcy Proceedings.
		·		We record revenue from TCEH, principally for electricity delivery fees, which totaled $281 million and $273 million for the three months ended September 30, 2014 and 2013, respectively, and $746 million and $728 million for the nine months ended September 30, 2014 and 2013, respectively.  The fees are based on rates regulated by the PUCT that apply to all REPs.  These revenues included less than $1 million for each of the three- and nine-month periods ended September 30, 2014 and 2013 pursuant to a transformer maintenance agreement with TCEH.  The balance sheets at September 30, 2014 and December 31, 2013 reflect trade accounts and other receivables from affiliates – net totaling $152 million ($47 million of which was unbilled) and $135 million ($56 million of which was unbilled), respectively, primarily consisting of trade receivables from TCEH related to these electricity delivery fees.
	Trade accounts and other receivables from EFH Corp. affiliates – net reported on our balance sheet consisted of the following:
			At September 30,				At December 31,
			2014				2013
	Trade accounts and other receivables from affiliates		$			157	$		141
	Trade accounts and other payables to affiliates					-5			-6
	Trade accounts and other receivables from affiliates – net		$			152	$		135
		·		EFH Corp. subsidiaries charge us for certain administrative services at cost.  Our payments to EFH Corp. subsidiaries for administrative services, which are primarily reported in operation and maintenance expenses, totaled $7 million and $8 million for the three months ended September 30, 2014 and 2013, respectively, and $22 million for each of the nine-month periods ended September 30, 2014 and 2013.  We also charge each other for shared facilities at cost.  Our payments to EFH Corp. for shared facilities totaled $1 million for the each of the three-month periods ended September 30, 2014 and 2013 and $3 million for the each of the nine-month periods ended September 30, 2014 and 2013.  Payments we received from EFH Corp. subsidiaries related to shared facilities totaled less than $1 million for the each of the three-month periods ended September 30, 2014 and 2013 and $2 million and $1 million for the nine months ended September 30, 2014 and 2013, respectively.
		·		Through June 30, 2014, we participated in the Energy Future Holdings Health and Welfare Benefit Program, which provided employee benefits to our workforce.  In October 2013, we notified EFH Corp. of our intention to withdraw from the benefit program effective June 30, 2014 and entered into an agreement with EFH Corp. pursuant to which, we agreed to pay EFH Corp. $1 million to reimburse EFH Corp. for its increased costs under the program as a result of our withdrawal from the program and the additional administrative work required to effectuate our withdrawal from the benefit program and transition to the new benefit program. This one-time payment was paid to EFH Corp. in June 2014.  In April 2014, we entered into a welfare benefit administration agreement with EFH Corp., pursuant to which EFH Corp. will continue to provide us with welfare benefit administration services under our new benefit plans from July 1, 2014 until December 31, 2014.  These amounts are included in the administrative services payments to EFH Corp. subsidiaries reported above.
		·		We are not a member of EFH Corp.’s consolidated tax group, but EFH Corp.’s consolidated federal income tax return includes EFH Corp.’s portion of our results due to EFH Corp.’s equity ownership in us.  Under the terms of a tax sharing agreement among us, Oncor Holdings, Texas Transmission, Investment LLC and EFH Corp., we are generally obligated to make payments to Texas Transmission, Investment LLC and EFH Corp., pro rata in accordance with their respective membership interests, in an aggregate amount that is substantially equal to the amount of federal income taxes that we would have been required to pay if we were filing our own corporate income tax return.  For periods prior to the tax sharing agreement (entered into in October 2007 and amended and restated in November 2008), we are responsible for our share, if any, of redetermined tax liability for the EFH Corp. consolidated tax group.  EFH Corp. also includes our results in its consolidated Texas margin tax payments, which are accounted for as income taxes and calculated as if we were filing our own return.  See discussion in Note 1 to Financial Statements in our 2013 Form 10-K under “Income Taxes.”  Under the “in lieu of” tax concept, all in lieu of tax assets and tax liabilities represent amounts that will eventually be settled with our members.
	Amounts payable to (receivable from) members related to income taxes under the tax sharing agreement and reported on our balance sheet consisted of the following:
		At September 30, 2014								At December 31, 2013
		EFH Corp.			Texas Transmission		Total			EFH Corp.		Texas Transmission		Total
	Federal income taxes receivable	$	-		$	-	$	-		$	-18	$	-5	$	-23
	Federal income taxes payable		38			9		47			-		-		-
	Texas margin taxes payable		18			-		18			23		-		23
	Net payable (receivable)	$	56		$	9	$	65		$	5	$	-5	$	-
	Cash payments made to (received from) members related to income taxes consisted of the following:
		Nine Months Ended								Nine Months Ended
		30-Sep-14								30-Sep-13
		EFH Corp.			Texas Transmission		Total			EFH Corp.		Texas Transmission		Total
	Federal income taxes	$	140		$	35	$	175		$	48	$	4	$	52
	Texas margin taxes		23			-		23			12		-		12
	Total payments (receipts)	$	163		$	35	$	198		$	60	$	4	$	64
		·		Our PUCT-approved tariffs include requirements to assure adequate credit worthiness of any REP to support the REP’s obligation to collect transition bond-related charges on behalf of Bondco.  Under these tariffs, as a result of TCEH’s credit rating being below investment grade, TCEH is required to post collateral support in an amount equal to estimated transition charges over specified time periods.  Accordingly, at both September 30, 2014 and December 31, 2013, TCEH had posted security in the amount of $9 million for our benefit.
		·		Under Texas regulatory provisions, the trust fund for decommissioning TCEH’s Comanche Peak nuclear generation facility is funded by a delivery fee surcharge we collect from REPs and remit monthly to TCEH.  Delivery fee surcharges totaled $5 million for each of the three-month periods ended September 30, 2014 and 2013 and $13 million and $12 million for the nine months ended September 30, 2014 and 2013, respectively.    Our sole obligation with regard to nuclear decommissioning is as the collection agent of funds charged to ratepayers for nuclear decommissioning activities.  If, at the time of decommissioning, actual decommissioning costs exceed available trust funds, we would not be obligated to pay any shortfalls but would be required to collect any rates approved by the PUCT to recover any additional decommissioning costs.  Further, if there were to be a surplus when decommissioning is complete, such surplus would be returned to ratepayers under terms prescribed by the PUCT.
		·		Affiliates of the Sponsor Group have (1) sold, acquired or participated in the offerings of our debt or debt securities in open market transactions or through loan syndications, and (2) performed various financial advisory, dealer, commercial banking and investment banking services for us and certain of our affiliates for which they have received or will receive customary fees and expenses, and may from time to time in the future participate in any of the items in (1) and (2) above.
	See Note 8 for information regarding distributions to members and Note 9 for information regarding our participation in EFH Corp. pension and OPEB plans and transactions with EFH Corp. involving employee benefit matters.

Supplementary_Financial_Inform

Supplementary Financial Information	9 Months Ended
	Sep. 30, 2014
Supplementary Financial Information [Abstract]	'
SUPPLEMENTARY FINANCIAL INFORMATION	'
	11.   SUPPLEMENTARY FINANCIAL INFORMATION
	Major Customers
	Revenues from TCEH represented 27% and 28% of our total operating revenues for the three months ended September 30, 2014 and 2013, respectively, and 26% and 28% of our total operating revenues for the nine months ended September 30, 2014 and 2013, respectively.  Revenues from REP subsidiaries of NRG Energy, Inc., a nonaffiliated entity, collectively represented 17% and 16% of our total operating revenues for the three months ended September 30, 2014 and 2013, respectively, and 16% and 15% of our total operating revenues for the nine months ended September 30, 2014 and 2013, respectively.  No other customer represented 10% or more of our total operating revenues.
	Other Income and Deductions
			Three Months Ended September 30,						Nine Months Ended September 30,
			2014			2013			2014			2013
	Other income:
	Accretion of fair value adjustment (discount) to regulatory assets due to purchase accounting		$	3		$	4		$	9		$	14
	Other			-			-			1			-
	Total other income		$	3		$	4		$	10		$	14
	Other deductions:
	Professional fees		$	3		$	2		$	10		$	8
	Other			1			-			1			3
	Total other deductions		$	4		$	2		$	11		$	11
	Interest Expense and Related Charges
			Three Months Ended September 30,						Nine Months Ended September 30,
			2014			2013			2014			2013
	Interest expense		$	89		$	90		$	267		$	270
	Amortization of debt issuance costs and discounts			1			6			2			21
	Allowance for funds used during construction – capitalized interest portion			-1			-2			-3			-8
	Total interest expense and related charges		$	89		$	94		$	266		$	283
	Restricted Cash
	All restricted cash amounts reported on our balance sheet at September 30, 2014 and December 31, 2013 relate to the transition bonds.
	Trade Accounts Receivable
	Trade accounts receivable reported on our balance sheet consisted of the following:
			At September 30,			At December 31,
			2014			2013
	Gross trade accounts receivable		$	626		$	527
	Trade accounts receivable from TCEH			-154			-139
	Allowance for uncollectible accounts			-3			-3
	Trade accounts receivable from nonaffiliates – net		$	469		$	385
	Gross trade accounts receivable at September 30, 2014 and December 31, 2013 included unbilled revenues of $165 million and $180 million, respectively.  At September 30, 2014 and December 31, 2013, REP subsidiaries of NRG Energy, Inc., a nonaffiliated entity, collectively represented approximately 14% and 12% of the nonaffiliated trade accounts receivable amount, respectively.
	Under a PUCT rule relating to the Certification of Retail Electric Providers, write-offs of uncollectible amounts owed by REPs are deferred as a regulatory asset.  Due to commitments made to the PUCT in 2007, we are not allowed to recover bad debt expense, or certain other costs and expenses, from ratepayers in the event of a default or bankruptcy by an affiliate REP.
	Investments and Other Property
	Investments and other property reported on our balance sheet consisted of the following:
			At September 30,			At December 31,
			2014			2013
	Assets related to employee benefit plans, including employee savings		$	93		$	88
	programs
	Land			3			3
	Total investments and other property		$	96		$	91
	Property, Plant and Equipment
	Property, plant and equipment reported on our balance sheet consisted of the following:
			At September 30,			At December 31,
			2014			2013
	Total assets in service		$	17,938		$	17,056
	Less accumulated depreciation			6,030			5,725
	Net of accumulated depreciation			11,908			11,331
	Construction work in progress			347			556
	Held for future use			15			15
	Property, plant and equipment – net		$	12,270		$	11,902
	Intangible Assets
	Intangible assets (other than goodwill) reported on our balance sheet consisted of the following:
		At September 30, 2014									At December 31, 2013
		Gross									Gross
		Carrying			Accumulated						Carrying			Accumulated
		Amount			Amortization			Net			Amount			Amortization		Net
	Identifiable intangible assets subject to amortization included in property, plant and equipment:
	Land easements	$	452		$	85		$	367		$	440		$	82	$	358
	Capitalized software		422			228			194			385			189		196
	Total	$	874		$	313		$	561		$	825		$	271	$	554
	Aggregate amortization expense for intangible assets totaled $15 million and $8 million for the three months ended September 30, 2014 and 2013, respectively, and $42 million and $38 million for the nine months ended September 30, 2014 and 2013, respectively.  The estimated aggregate amortization expense for each of the next five fiscal years from December 31, 2013 is as follows:
	Year					Amortization Expense
2014					$	58
2015						60
2016						57
2017						49
2018						45
At both September 30, 2014 and December 31, 2013, goodwill totaling $4.1 billion was reported on our balance sheet.  None of this goodwill is being deducted for tax purposes.
Other Noncurrent Liabilities and Deferred Credits
Other noncurrent liabilities and deferred credits reported on our balance sheet consisted of the following:
		At September 30,			At December 31,
		2014			2013
Retirement plans and other employee benefits		$	1,434		$	1,399
Uncertain tax positions (including accrued interest)			37			56
Amount payable related to income taxes			17			17
Investment tax credits			18			20
Other			72			62
Total other noncurrent liabilities and deferred credits		$	1,578		$	1,554
In the first and third quarters of 2014, several uncertain tax positions were remeasured under US GAAP guidance as a result of new information received from the IRS with respect to the audit of tax years 2007 through 2009.  As a result, we reduced the liability for uncertain tax positions by $19 million.  This reduction consisted of a $15 million increase to liability in lieu of deferred income taxes, a $2 million reversal of provision in lieu of income taxes and a $2 million ($1 million after tax) reversal of accrued interest, which is reported as a decrease in provision in lieu of income taxes.  In September 2014, EFH Corp. signed the final agreed Revenue Agent Report and associated documentation (RAR) for the 2007 tax year and filed a motion seeking bankruptcy court approval of its signing of the RAR.  Such approval was granted on October 27, 2014.
Supplemental Cash Flow Information
		Nine Months Ended September 30,
		2014			2013
Cash payments (receipts) related to:
Interest		$	296		$	300
Capitalized interest			-3			-8
Interest (net of amounts capitalized)		$	293		$	292
Amount in lieu of income taxes (a):
Federal		$	175		$	52
State			23			12
Total amount in lieu of income taxes		$	198		$	64
Noncash construction expenditures (b)		$	34		$	55
_____________
	(a)		See Note 10 for additional information regarding income taxes.
	(b)		Represents end-of-period accruals.

Business_and_Significant_Accou1

Business and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2014
Business and Significant Accounting Policies [Abstract]	'
Description Of Business	'
	Description of Business
	References in this report to “we,” “our,” “us” and “the company” are to Oncor and/or its subsidiary as apparent in the context.  See “Glossary” for definition of terms and abbreviations.
	We are a regulated electricity transmission and distribution company principally engaged in providing delivery services to REPs, including subsidiaries of TCEH, that sell power in the north-central, eastern and western parts of Texas.  Revenues from TCEH represented 26% and 28% of our total operating revenues for the nine months ended September 30, 2014 and 2013, respectively.  We are a direct, majority-owned subsidiary of Oncor Holdings, which is a direct, wholly-owned subsidiary of EFIH, a direct, wholly-owned subsidiary of EFH Corp.  EFH Corp. is a subsidiary of Texas Holdings, which is controlled by the Sponsor Group.  Oncor Holdings owns 80.03% of our membership interests, Texas Transmission owns 19.75% of our membership interests and certain members of our management team and board of directors indirectly own the remaining membership interests through Investment LLC.  We are managed as an integrated business; consequently, there are no separate reportable business segments.
	Our consolidated financial statements include our wholly-owned, bankruptcy-remote financing subsidiary, Bondco, a variable interest entity.  This financing subsidiary was organized for the limited purpose of issuing certain transition bonds in 2003 and 2004.  Bondco issued $1.3 billion principal amount of transition bonds to recover generation-related regulatory asset stranded costs and other qualified costs under an order issued by the PUCT in 2002.
	Various “ring-fencing” measures have been taken to enhance the separateness between the Oncor Ring-Fenced Entities and the Texas Holdings Group and our credit quality.  These measures serve to mitigate our and Oncor Holdings’ credit exposure to the Texas Holdings Group and to reduce the risk that our assets and liabilities or those of Oncor Holdings would be substantively consolidated with the assets and liabilities of the Texas Holdings Group in connection with a bankruptcy of one or more of those entities.  Such measures include, among other things: our sale of a 19.75% equity interest to Texas Transmission in November 2008; maintenance of separate books and records for the Oncor Ring-Fenced Entities; our board of directors being comprised of a majority of independent directors; and prohibitions on the Oncor Ring-Fenced Entities providing credit support to, or receiving credit support from, any member of the Texas Holdings Group.  The assets and liabilities of the Oncor Ring-Fenced Entities are separate and distinct from those of the Texas Holdings Group, including TXU Energy and Luminant, and none of the assets of the Oncor Ring-Fenced Entities are available to satisfy the debt or contractual obligations of any member of the Texas Holdings Group.  We do not bear any liability for debt or contractual obligations of the Texas Holdings Group, and vice versa.  Accordingly, our operations are conducted, and our cash flows are managed, independently from the Texas Holdings Group.
EFH Corp. Bankruptcy Proceedings	'
	EFH Corp. Bankruptcy Proceedings
	On the EFH Petition Date, EFH Corp. and the substantial majority of its direct and indirect subsidiaries that are members of the Texas Holdings Group, including EFIH, EFCH and TCEH, commenced proceedings under Chapter 11 of the US Bankruptcy Code.  The Oncor Ring-Fenced Entities are not parties to the EFH Bankruptcy Proceedings.  We believe the “ring-fencing” measures discussed above mitigate our potential exposure to the EFH Bankruptcy Proceedings.  See Note 2 for a discussion of the potential impacts of the EFH Bankruptcy Proceedings on our financial statements.
Basis Of Presentation	'
	Basis of Presentation
	Our condensed consolidated financial statements have been prepared in accordance with US GAAP and on the same basis as the audited financial statements in our 2013 Form 10-K.  Adjustments (consisting of normal recurring accruals) necessary for a fair presentation of the results of operations and financial position have been included therein.  All intercompany items and transactions have been eliminated in consolidation.  Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with US GAAP have been omitted pursuant to the rules and regulations of the SEC.  Because the condensed consolidated interim financial statements do not include all of the information and footnotes required by US GAAP, they should be read in conjunction with the audited financial statements and related notes in our 2013 Form 10-K.  The results of operations for an interim period may not give a true indication of results for a full year due to seasonality.  All dollar amounts in the financial statements and tables in the notes are stated in millions of US dollars unless otherwise indicated.
Use Of Estimates	'
	Use of Estimates
	Preparation of our financial statements requires management to make estimates and assumptions about future events that affect the reporting of assets and liabilities at the balance sheet dates and the reported amounts of revenue and expense, including fair value measurements.  In the event estimates and/or assumptions prove to be different from actual amounts, adjustments are made in subsequent periods to reflect more current information.
Derivative Instruments And Mark-To-Market Accounting	'
	Derivative Instruments and Mark-to-Market Accounting
	We have from time-to-time entered into derivative instruments to hedge interest rate risk.  If the instrument meets the definition of a derivative under accounting standards related to derivative instruments and hedging activities, the fair value of each derivative is recognized on the balance sheet as a derivative asset or liability and changes in the fair value are recognized in net income, unless criteria for certain exceptions are met.  This recognition is referred to as “mark-to-market” accounting.
Reconcilable Tariffs	'
	Reconcilable Tariffs
	The PUCT has designated certain tariffs (TCRF, EECRF surcharges, AMS surcharges and charges related to transition bonds) as reconcilable, which means the differences between amounts billed under these tariffs and the related incurred costs are deferred as either regulatory assets or regulatory liabilities.  Accordingly, at prescribed intervals, future tariffs are adjusted to either repay regulatory liabilities or collect regulatory assets.
Contingencies	'
	Contingencies
	We evaluate and account for contingencies using the best information available.  A loss contingency is accrued and disclosed when it is probable that an asset has been impaired or a liability incurred and the amount of the loss can be reasonably estimated.  If a range of probable loss is established, the minimum amount in the range is accrued, unless some other amount within the range appears to be a better estimate.  If the probable loss cannot be reasonably estimated, no accrual is recorded, but the loss contingency is disclosed to the effect that the probable loss cannot be reasonably estimated.  A loss contingency will be disclosed when it is reasonably possible that an asset has been impaired or a liability incurred.  If the likelihood that an impairment or incurrence is remote, the contingency is neither accrued nor disclosed.  Gain contingencies are recognized upon realization.
Changes In Accounting Standards	'
	Changes in Accounting Standards
	In May 2014, the Financial Accounting Standards Board issued Accounting Standards Update No. 2014-09 (ASU 2014-09), Revenue from Contracts with Customers.  ASU 2014-09 introduces new, increased requirements for disclosure of revenue in financial statements and is intended to eliminate inconsistencies in revenue recognition and thereby improve financial reporting comparability across entities, industries and capital markets.  ASU 2014-09 is effective for annual reporting periods (including interim reporting periods within those periods) beginning after December 15, 2016 for public entities.  Early application is not permitted.  We are currently evaluating the potential impact of ASU 2014-09.  The adoption of ASU 2014-09 is not expected to have a material effect on our reported results of operations, financial condition or cash flows.

Regulatory_Assets_and_Liabilit1

Regulatory Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2014
Regulatory Assets and Liabilities [Abstract]	'
Components Of Regulatory Assets And Liabilities	'
			Remaining Rate Recovery/Amortization Period at		Carrying Amount At
			30-Sep-14		30-Sep-14		31-Dec-13
	Regulatory assets:
	Generation-related regulatory assets securitized by transition bonds (a)(e)		2 years		$	183	$	281
	Employee retirement costs		5 years			59		71
	Employee retirement costs to be reviewed (b)(c)		To be determined			241		224
	Employee retirement liability (a)(c)(d)		To be determined			520		491
	Self-insurance reserve (primarily storm recovery costs) ― net		5 years			135		158
	Self-insurance reserve to be reviewed ― net (b)(c)		To be determined			206		196
	Securities reacquisition costs (pre-industry restructure)		3 years			26		32
	Securities reacquisition costs (post-industry restructure) ― net		Terms of related debt			6		5
	Recoverable amounts in lieu of deferred		Life of related asset or liability			19		42
	income taxes ― net
	Rate review expenses (a)		Various			4		4
	Advanced meter customer education costs		5 years			7		8
	Deferred conventional meter and metering		Largely 6 years			129		146
	facilities depreciation
	Deferred AMS costs		To be determined			101		62
	Energy efficiency performance bonus (a)		1 year			25		12
	Under-recovered wholesale transmission		1 year			18		37
	service expense ― net (a)
	Other regulatory assets		Various			2		2
	Total regulatory assets					1,681		1,771
	Regulatory liabilities:
	Estimated net removal costs		Life of utility plant			495		385
	Investment tax credit and protected excess		Various			18		23
	deferred taxes
	Over-collection of transition bond revenues (a)(e)		2 years			37		35
	Energy efficiency programs (a)		Not applicable			20		4
	Total regulatory liabilities					570		447
	Net regulatory asset				$	1,111	$	1,324
	____________
		(a)		Not earning a return in the regulatory rate-setting process.
		(b)		Costs incurred since the period covered under the last rate review.
		(c)		Recovery is specifically authorized by statute or by the PUCT, subject to reasonableness review.
		(d)		Represents unfunded liabilities recorded in accordance with pension and OPEB accounting standards.
		(e)		Bondco net regulatory assets of $136 million at September 30, 2014 consisted of $173 million included in generation-related regulatory assets net of the regulatory liability for over-collection of transition bond revenues of $37 million.  Bondco net regulatory assets of $226 million at December 31, 2013 consisted of $261 million included in generation-related regulatory assets net of the regulatory liability for over-collection of transition bond revenues of $35 million.

LongTerm_Debt_Tables

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2014
Borrowings Under Credit Facilities And Long-Term Debt [Abstract]	'
Schedule Of Long-Term Debt	'
		September 30,		December 31,
		2014		2013
	Oncor (a):
	6.375% Fixed Senior Notes due January 15, 2015	$	500	$	500
	5.000% Fixed Senior Notes due September 30, 2017		324		324
	6.800% Fixed Senior Notes due September 1, 2018		550		550
	2.150% Fixed Senior Notes due June 1, 2019		250		-
	5.750% Fixed Senior Notes due September 30, 2020		126		126
	4.100% Fixed Senior Notes due June 1, 2022		400		400
	7.000% Fixed Debentures due September 1, 2022		800		800
	7.000% Fixed Senior Notes due May 1, 2032		500		500
	7.250% Fixed Senior Notes due January 15, 2033		350		350
	7.500% Fixed Senior Notes due September 1, 2038		300		300
	5.250% Fixed Senior Notes due September 30, 2040		475		475
	4.550% Fixed Senior Notes due December 1, 2041		400		400
	5.300% Fixed Senior Notes due June 1, 2042		500		500
	Unamortized discount		-20		-23
	Less amount due currently		-500		-
	Long-term debt, less amounts due currently — Oncor		4,955		5,202
	Bondco (b):
	5.420% Fixed Series 2003 Bonds due in semiannual installments through August 15, 2015		54		106
	5.290% Fixed Series 2004 Bonds due in semiannual installments through May 15, 2016		168		205
	Unamortized fair value discount related to transition bonds		-		-1
	Less amount due currently		-136		-131
	Long-term debt, less amounts due currently — Bondco		86		179
	Total long-term debt, less amounts due currently	$	5,041	$	5,381
	__________
	(a)   Secured by first priority lien on certain transmission and distribution assets equally and ratably with all of Oncor’s other secured indebtedness.  See “Deed of Trust” in Note 6 to Financial Statements in our 2013 Form 10-K for additional information.
	(b)   The transition bonds are nonrecourse to Oncor and were issued to securitize a regulatory asset.

Membership_Interests_Tables

Membership Interests (Tables)	9 Months Ended
	Sep. 30, 2014
Membership Interests [Abstract]	'
Schedule Of Distributions Paid	'
	Declaration Date		Payment Date	Amount
	30-Jul-14		31-Jul-14	$	71
	30-Apr-14		1-May-14		57
	19-Feb-14		20-Feb-14	$	53
Schedule Of Changes To Membership Interests	'
		Capital Accounts		Accumulated Other Comprehensive Income (Loss)		Total Membership Interests
	Balance at December 31, 2013	$	7,457	$	-48	$	7,409
	Net income		355		-		355
	Distributions		-181		-		-181
	Net effects of cash flow hedges (net of tax)				2		2
	Defined benefit pension plans (net of tax)		-		-1		-1
	Balance at September 30, 2014	$	7,631	$	-47	$	7,584
		Capital Accounts		Accumulated Other Comprehensive Income (Loss)		Total Membership Interests
	Balance at December 31, 2012	$	7,335	$	-31	$	7,304
	Net income		329		-		329
	Distributions		-215		-		-215
	Net effects of cash flow hedges (net of tax)				3		3
	Defined benefit pension plans (net of tax)		-		-1		-1
	Other		-1		-		-1
	Balance at September 30, 2013	$	7,448	$	-29	$	7,419
Schedule Of Changes To Accumulated Other Comprehensive Income (Loss)	'
		Cash Flow Hedges – Interest Rate Swap		Defined Benefit Pension and OPEB Plans		Accumulated Other Comprehensive Income (Loss)
	Balance at December 31, 2013	$	-26	$	-22	$	-48
	Defined benefit pension plans (net of tax)		-		-1		-1
	Amounts reclassified from accumulated other comprehensive income (loss) and reported in interest expense and related charges		2		-		2
	Balance at September 30, 2014	$	-24	$	-23	$	-47
		Cash Flow Hedges – Interest Rate Swap		Defined Benefit Pension and OPEB Plans		Accumulated Other Comprehensive Income (Loss)
	Balance at December 31, 2012	$	-28	$	-3	$	-31
	Defined benefit pension plans (net of tax)		-		-1		-1
	Amounts reclassified from accumulated other comprehensive income (loss) and reported in interest expense and related charges		3		-		3
	Balance at September 30, 2013	$	-25	$	-4	$	-29

Pension_and_Other_Postretireme1

Pension and Other Postretirement Employee Benefits Plans (Tables)	9 Months Ended
	Sep. 30, 2014
Pension and Other Postretirement Employee Benefits Plans [Abstract]	'
Schedule Of Pension And OPEB Plan Costs	'
		Three Months Ended September 30,				Nine Months Ended September 30,
		2014		2013		2014		2013
	Components of net allocated pension costs:
	Service cost	$	6	$	6	$	18	$	18
	Interest cost		33		31		99		92
	Expected return on assets		-34		-31		-102		-91
	Amortization of net loss		9		17		29		52
	Net pension costs		14		23		44		71
	Components of net OPEB costs:
	Service cost		2		1		5		4
	Interest cost		11		9		33		28
	Expected return on assets		-3		-3		-9		-9
	Amortization of prior service cost		-5		-5		-15		-15
	Amortization of net loss		8		7		20		19
	Net OPEB costs		13		9		34		27
	Total net pension and OPEB costs		27		32		78		98
	Less amounts deferred principally as property or a regulatory asset		-18		-23		-51		-71
	Net amounts recognized as expense	$	9	$	9	$	27	$	27

RelatedParty_Transactions_Tabl

Related-Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2014
Related-Party Transactions [Abstract]	'
Schedule OF Trade Accounts And Other Receivables From Related Parties	'
			At September 30,			At December 31,
			2014			2013
	Trade accounts and other receivables from affiliates		$		157	$		141
	Trade accounts and other payables to affiliates				-5			-6
	Trade accounts and other receivables from affiliates – net		$		152	$		135
Schedule Of Related Party Transactions	'
	Amounts payable to (receivable from) members related to income taxes under the tax sharing agreement and reported on our balance sheet consisted of the following:
		At September 30, 2014							At December 31, 2013
		EFH Corp.		Texas Transmission		Total			EFH Corp.		Texas Transmission		Total
	Federal income taxes receivable	$	-	$	-	$	-		$	-18	$	-5	$	-23
	Federal income taxes payable		38		9		47			-		-		-
	Texas margin taxes payable		18		-		18			23		-		23
	Net payable (receivable)	$	56	$	9	$	65		$	5	$	-5	$	-
	Cash payments made to (received from) members related to income taxes consisted of the following:
		Nine Months Ended							Nine Months Ended
		30-Sep-14							30-Sep-13
		EFH Corp.		Texas Transmission		Total			EFH Corp.		Texas Transmission		Total
	Federal income taxes	$	140	$	35	$	175		$	48	$	4	$	52
	Texas margin taxes		23		-		23			12		-		12
	Total payments (receipts)	$	163	$	35	$	198		$	60	$	4	$	64

Supplementary_Financial_Inform1

Supplementary Financial Information (Tables)	9 Months Ended
	Sep. 30, 2014
Supplementary Financial Information [Abstract]	'
Schedule Of Other Income And Deductions	'
			Three Months Ended September 30,						Nine Months Ended September 30,
			2014			2013			2014			2013
	Other income:
	Accretion of fair value adjustment (discount) to regulatory assets due to purchase accounting		$	3		$	4		$	9		$	14
	Other			-			-			1			-
	Total other income		$	3		$	4		$	10		$	14
	Other deductions:
	Professional fees		$	3		$	2		$	10		$	8
	Other			1			-			1			3
	Total other deductions		$	4		$	2		$	11		$	11
Schedule Of Interest Expense And Related Charges	'
			Three Months Ended September 30,						Nine Months Ended September 30,
			2014			2013			2014			2013
	Interest expense		$	89		$	90		$	267		$	270
	Amortization of debt issuance costs and discounts			1			6			2			21
	Allowance for funds used during construction – capitalized interest portion			-1			-2			-3			-8
	Total interest expense and related charges		$	89		$	94		$	266		$	283
Schedule Of Trade Accounts Receivable	'
			At September 30,			At December 31,
			2014			2013
	Gross trade accounts receivable		$	626		$	527
	Trade accounts receivable from TCEH			-154			-139
	Allowance for uncollectible accounts			-3			-3
	Trade accounts receivable from nonaffiliates – net		$	469		$	385
Summary of Investment Balance	'
			At September 30,			At December 31,
			2014			2013
	Assets related to employee benefit plans, including employee savings		$	93		$	88
	programs
	Land			3			3
	Total investments and other property		$	96		$	91
Schedule Of Property, Plant And Equipment	'
			At September 30,			At December 31,
			2014			2013
	Total assets in service		$	17,938		$	17,056
	Less accumulated depreciation			6,030			5,725
	Net of accumulated depreciation			11,908			11,331
	Construction work in progress			347			556
	Held for future use			15			15
	Property, plant and equipment – net		$	12,270		$	11,902
Schedule Of Intangible Assets	'
		At September 30, 2014									At December 31, 2013
		Gross									Gross
		Carrying			Accumulated						Carrying			Accumulated
		Amount			Amortization			Net			Amount			Amortization		Net
	Identifiable intangible assets subject to amortization included in property, plant and equipment:
	Land easements	$	452		$	85		$	367		$	440		$	82	$	358
	Capitalized software		422			228			194			385			189		196
	Total	$	874		$	313		$	561		$	825		$	271	$	554
Schedule Of Estimated Aggregate Amortization Expenses	'
	Year					Amortization Expense
	2014					$	58
	2015						60
	2016						57
	2017						49
	2018						45
Schedule Of Other Noncurrent Liabilities And Deferred Credits	'
			At September 30,			At December 31,
			2014			2013
	Retirement plans and other employee benefits		$	1,434		$	1,399
	Uncertain tax positions (including accrued interest)			37			56
	Amount payable related to income taxes			17			17
	Investment tax credits			18			20
	Other			72			62
	Total other noncurrent liabilities and deferred credits		$	1,578		$	1,554
Schedule Of Supplemental Cash Flow Information	'
			Nine Months Ended September 30,
			2014			2013
	Cash payments (receipts) related to:
	Interest		$	296		$	300
	Capitalized interest			-3			-8
	Interest (net of amounts capitalized)		$	293		$	292
	Amount in lieu of income taxes (a):
	Federal		$	175		$	52
	State			23			12
	Total amount in lieu of income taxes		$	198		$	64
	Noncash construction expenditures (b)		$	34		$	55
	_____________
		(a)		See Note 10 for additional information regarding income taxes.
		(b)		Represents end-of-period accruals.

Business_and_Significant_Accou2

Business and Significant Accounting Policies (Details) (USD $)	1 Months Ended	9 Months Ended		9 Months Ended
In Billions, unless otherwise specified	Nov. 30, 2008	Sep. 30, 2014	Dec. 31, 2002	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2014
		entity		TCEH [Member]	TCEH [Member]	Oncor [Member]	Texas Transmission [Member]
Description of Business [Line Items]	'	'	'	'	'	'	'
Concentration Risk Percentage	'	'	'	26.00%	28.00%	'	'
Percentage of membership interest owned by company	'	'	'	'	'	80.03%	'
Percentage of membership interest owned by non-controlling owners	'	'	'	'	'	'	19.75%
Number of entities that would possibly be bankrupt	'	1	'	'	'	'	'
Principal amount of transition bonds issued	'	'	$1.30	'	'	'	'
Percentage of equity interest sold in the event of bankruptcy	19.75%	'	'	'	'	'	'

EFH_Bankruptcy_Proceedings_Nar

EFH Bankruptcy Proceedings (Narrative) (Details) (USD $)	5 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Apr. 28, 2014
EFH Bankruptcy Proceedings [Abstract]	'	'
Amount receivable from related party	'	$129
Amount collected from related party	$127	'

Regulatory_Matters_Details

Regulatory Matters (Details) (USD $)	Sep. 30, 2014	Aug. 21, 2014
In Millions, unless otherwise specified	item
Regulatory Matters [Abstract]	'	'
Number of original jurisdiction cities	204	'
Number of other parties appealed various portions of rate review final order to a state district court,	4	'
Number of issues which revised the judgment	2	'
Estimated impact on earnings, minimum	'	$0
Estimated impact on earnings, maximum	'	$130

Regulatory_Assets_and_Liabilit2

Regulatory Assets and Liabilities (Components Of Regulatory Assets And Liabilities) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Regulatory Assets And Liabilities [Line Items]	'		'
Carrying Amount, Regulatory Assets	$1,681		$1,771
Carrying Amount, Regulatory Liabilities	570		447
Net regulatory asset	1,111		1,324
Bondco [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Net regulatory asset	136		226
Estimated Net Removal Costs [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Life of utility plant		'
Carrying Amount, Regulatory Liabilities	495		385
Investment Tax Credit and Protected Excess Deferred Taxes [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Various		'
Carrying Amount, Regulatory Liabilities	18		23
Over Collection of Transition Bond Revenues [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'2 years	[1],[2]	'
Carrying Amount, Regulatory Liabilities	37	[1],[2]	35	[1],[2]
Net regulatory asset	37		35
Energy Efficiency Programs [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Not applicable	[1]	'
Carrying Amount, Regulatory Liabilities	20	[1]	4	[1]
Generation Related Regulatory Assets Securitized by Transition Bonds [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'2 years	[1],[2]	'
Carrying Amount, Regulatory Assets	183	[1],[2]	281	[1],[2]
Net regulatory asset	173		261
Employee Retirement Costs [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'5 years		'
Carrying Amount, Regulatory Assets	59		71
Employee Retirement Costs to be Reviewed [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'To be determined	[3],[4]	'
Carrying Amount, Regulatory Assets	241	[3],[4]	224	[3],[4]
Employee Retirement Liability [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'To be determined	[1],[4],[5]	'
Carrying Amount, Regulatory Assets	520	[1],[4],[5]	491	[1],[4],[5]
Self Insurance Reserve (Primarily Storm Recovery Costs) - Net [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'5 years		'
Carrying Amount, Regulatory Assets	135		158
Self Insurance Reserve to be Reviewed [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'To be determined	[3],[4]	'
Carrying Amount, Regulatory Assets	206	[3],[4]	196	[3],[4]
Securities Reacquisition Costs (Pre-Industry Restructure) [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'3 years		'
Carrying Amount, Regulatory Assets	26		32
Securities Reacquisition Costs (Post Industry Restructure) - Net [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Terms of related debt		'
Carrying Amount, Regulatory Assets	6		5
Recoverable Amounts In Lieu Of Deferred Income Taxes - Net [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Life of related asset or liability		'
Carrying Amount, Regulatory Assets	19		42
Rate Review Expenses [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Various	[1]	'
Carrying Amount, Regulatory Assets	4	[1]	4	[1]
Advanced Meter Customer Education Costs [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'5 years		'
Carrying Amount, Regulatory Assets	7		8
Deferred Conventional Meter And Metering Facilities Depreciation [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Largely 6 years		'
Carrying Amount, Regulatory Assets	129		146
Deferred AMS Costs [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'To be determined		'
Carrying Amount, Regulatory Assets	101		62
Energy Efficiency Performance Bonus [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'1 year	[1]	'
Carrying Amount, Regulatory Assets	25	[1]	12	[1]
Under Recovered Wholesale Transmission Service Expense - Net [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'1 year	[1]	'
Carrying Amount, Regulatory Assets	18	[1]	37	[1]
Other Regulatory Assets [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Various		'
Carrying Amount, Regulatory Assets	$2		$2
[1]	Not earning a return in the regulatory rate-setting process.
[2]	Bondco net regulatory assets of $136 million at September 30, 2014 consisted of $173 million included in generation-related regulatory assets net of the regulatory liability for over-collection of transition bond revenues of $37 million. Bondco net regulatory assets of $226 million at December 31, 2013 consisted of $261 million included in generation-related regulatory assets net of the regulatory liability for over-collection of transition bond revenues of $35 million.
[3]	Costs incurred since the period covered under the last rate review.
[4]	Recovery is specifically authorized by statute or by the PUCT, subject to reasonableness review.
[5]	Represents unfunded liabilities recorded in accordance with pension and OPEB accounting standards.

Borrowings_Under_Credit_Facili1

Borrowings Under Credit Facilities (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
	item
Line of Credit Facility [Line Items]	'	'
Secured revolving credit facility	$2,400,000,000	'
Number of revolving credit facilities extension options	2	'
Extension period for revolving line of credit	'1 year	'
Additional increase in borrowing capacity amount	100,000,000	'
Outstanding borrowing under the revolving credit facility	720,000,000	745,000,000
Outstanding borrowing, interest rate	1.28%	1.67%
Letters of credit	7,000,000	6,000,000
Commitment fee	0.13%	'
Borrowing capacity available under the credit facility	1,673,000,000	1,649,000,000
Percentage of fair value and cost of property additions	85.00%	'
Available bond credits	2,199,000,000	'
Additional potential indebtedness	$1,407,000,000	'
Maximum [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Commitment rate reduction under the revolving credit facility	0.28%	'
Senior debt-to-capitalization ratio	65.00%	'
Minimum [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Commitment rate reduction under the revolving credit facility	0.10%	'
Letter of Credit [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Outstanding borrowing, interest rate	1.33%	'
London Interbank Offered Rate (LIBOR) [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Spread over variable rate	1.13%	'
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Spread over variable rate	1.75%	'
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Spread over variable rate	1.00%	'
Federal Funds Effective Rate [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Spread over variable rate	0.50%	'
One Month LIBOR [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Spread over variable rate	1.00%	'
One Month LIBOR [Member] | Maximum [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Spread over variable rate	0.75%	'
One Month LIBOR [Member] | Minimum [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Spread over variable rate	0.00%	'

LongTerm_Debt_Narrative_Detail

Long-Term Debt (Narrative) (Details) (USD $)	9 Months Ended			1 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	31-May-14	Sep. 30, 2014
				2.150% Fixed Senior Notes Due June 1, 2019 [Member]	2.150% Fixed Senior Notes Due June 1, 2019 [Member]
Debt Instrument [Line Items]	'	'	'	'	'
Repayments of long-term debt	$89	$84	'	'	'
Amount of debt issued	'	'	'	250	250	[1]
Percentage of interest	'	'	'	2.15%	2.15%
Issuance of long-term debt	250	100	'	248	'
Percentage of principal amount plus accrued and unpaid interest and make-whole premium	100.00%	'	'	'	'
Increase in basis points	0.50%	'	'	'	'
Estimated fair value of our long-term debt including current maturities	6,759	'	6,188	'	'
Carrying amount	$5,677	'	$5,512	'	'
[1]	Secured by first priority lien on certain transmission and distribution assets equally and ratably with all of Oncor’s other secured indebtedness. See “Deed of Trust” in Note 6 to Financial Statements in our 2013 Form 10-K for additional information.

LongTerm_Debt_Schedule_Of_Long

Long-Term Debt (Schedule Of Long-Term Debt) (Details) (USD $)

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

31-May-14

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Dec. 31, 2013

In Millions, unless otherwise specified

6.375% Fixed Senior Notes Due January 15, 2015 [Member]

6.375% Fixed Senior Notes Due January 15, 2015 [Member]

5.000% Fixed Senior Notes Due September 30, 2017 [Member]

5.000% Fixed Senior Notes Due September 30, 2017 [Member]

6.800% Fixed Senior Notes Due September 1, 2018 [Member]

6.800% Fixed Senior Notes Due September 1, 2018 [Member]

2.150% Fixed Senior Notes Due June 1, 2019 [Member]

2.150% Fixed Senior Notes Due June 1, 2019 [Member]

5.750% Fixed Senior Notes Due September 30, 2020 [Member]

5.750% Fixed Senior Notes Due September 30, 2020 [Member]

4.100% Fixed Senior Notes Due June 1, 2022 [Member]

4.100% Fixed Senior Notes Due June 1, 2022 [Member]

7.000% Fixed Debentures Due September 1, 2022 [Member]

7.000% Fixed Debentures Due September 1, 2022 [Member]

7.000% Fixed Senior Notes Due May 1, 2032 [Member]

7.000% Fixed Senior Notes Due May 1, 2032 [Member]

7.250% Fixed Senior Notes Due January 15, 2033 [Member]

7.250% Fixed Senior Notes Due January 15, 2033 [Member]

7.500% Fixed Senior Notes Due September 1, 2038 [Member]

7.500% Fixed Senior Notes Due September 1, 2038 [Member]

5.250% Fixed Senior Notes Due September 30, 2040 [Member]

5.250% Fixed Senior Notes Due September 30, 2040 [Member]

4.550% Fixed Senior Notes Due December 1, 2041 [Member]

4.550% Fixed Senior Notes Due December 1, 2041 [Member]

5.300% Fixed Senior Notes Due June 1, 2042 [Member]

5.300% Fixed Senior Notes Due June 1, 2042 [Member]

5.420% Fixed Series 2003 Bonds Due Through August 15, 2015 [Member]

5.420% Fixed Series 2003 Bonds Due Through August 15, 2015 [Member]

5.290% Fixed Series 2004 Bonds Due Through May 15, 2016 [Member]

5.290% Fixed Series 2004 Bonds Due Through May 15, 2016 [Member]

Oncor [Member]

Oncor [Member]

Bondco [Member]

Bondco [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fixed Senior Note

'

'

$500

[1]

$500

[1]

$324

[1]

$324

[1]

$550

[1]

$550

[1]

$250

[1]

$250

$126

[1]

$126

[1]

$400

[1]

$400

[1]

$800

[1]

$800

[1]

$500

[1]

$500

[1]

$350

[1]

$350

[1]

$300

[1]

$300

[1]

$475

[1]

$475

[1]

$400

[1]

$400

[1]

$500

[1]

$500

[1]

'

'

'

'

'

'

'

'

Unamortized discount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-20

[1]

-23

[1]

'

-1

[2]

Fixed Bonds

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

54

[2]

106

[2]

168

[2]

205

[2]

'

'

'

'

Less amount due currently

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-500

[1]

'

-136

[2]

-131

[2]

Total long-term debt, less amounts due currently

$5,041

$5,381

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$4,955

[1]

$5,202

[1]

$86

[2]

$179

[2]

Percentage of interest

'

'

6.38%

'

5.00%

'

6.80%

'

2.15%

2.15%

5.75%

'

4.10%

'

7.00%

'

7.00%

'

7.25%

'

7.50%

'

5.25%

'

4.55%

'

5.30%

'

5.42%

'

5.29%

'

'

'

'

'

[1]

Secured by first priority lien on certain transmission and distribution assets equally and ratably with all of Oncor’s other secured indebtedness. See “Deed of Trust” in Note 6 to Financial Statements in our 2013 Form 10-K for additional information.

[2]

The transition bonds are nonrecourse to Oncor and were issued to securitize a regulatory asset.

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Commitments and Contingencies [Abstract]	'
Aggregate maximum amount of residual values guaranteed	$6
Average life of the residual value guarantees under the lease portfolio	'2 years 4 months 24 days

Membership_Interests_Narrative

Membership Interests (Narrative) (Details) (USD $)	9 Months Ended		0 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Oct. 29, 2014
			Subsequent Event [Member]
Subsequent Event [Line Items]	'	'	'
Declaration of cash distribution to members	$181	$215	$101
Assumed debt to equity ratio, debt	60.00%	'	'
Assumed debt to equity ratio, equity	40.00%	'	'
Regulatory capitalization ratio, debt	58.70%	'	'
Regulatory capitalization ratio, equity	41.30%	'	'
Cash available for distribution under the capital structure restriction	$193	'	'

Membership_Interests_Schedule_

Membership Interests (Schedule Of Distributions Paid) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Dividends Payable [Line Items]	'	'
Amount	$181	$215
Payment Three FY 2013 [Member]	'	'
Dividends Payable [Line Items]	'	'
Declaration Date	30-Jul-14	'
Payment Date	31-Jul-14	'
Amount	71	'
Payment Two FY 2014 [Member]	'	'
Dividends Payable [Line Items]	'	'
Declaration Date	30-Apr-14	'
Payment Date	1-May-14	'
Amount	57	'
Payment One FY 2014 [Member]	'	'
Dividends Payable [Line Items]	'	'
Declaration Date	19-Feb-14	'
Payment Date	20-Feb-14	'
Amount	$53	'

Membership_Interests_Schedule_1

Membership Interests (Schedule Of Changes To Membership Interests) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]	'	'	'	'
Balance	'	'	$7,409	$7,304
Net income	158	146	355	329
Distributions	'	'	-181	-215
Net effects of cash flow hedges (net of tax)	1	1	2	3
Defined benefit pension plans (net of tax)	-1	'	-1	-1
Other	'	'	'	1
Balance	7,584	7,419	7,584	7,419
Capital Accounts [Member]	'	'	'	'
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]	'	'	'	'
Balance	'	'	7,457	7,335
Net income	'	'	355	329
Distributions	'	'	-181	-215
Net effects of cash flow hedges (net of tax)	'	'	'	'
Defined benefit pension plans (net of tax)	'	'	'	'
Other	'	'	'	1
Balance	7,631	7,448	7,631	7,448
Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'	'
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]	'	'	'	'
Balance	'	'	-48	-31
Net income	'	'	'	'
Distributions	'	'	'	'
Net effects of cash flow hedges (net of tax)	'	'	2	3
Defined benefit pension plans (net of tax)	'	'	-1	-1
Other	'	'	'	'
Balance	($47)	($29)	($47)	($29)

Membership_Interests_Schedule_2

Membership Interests (Schedule Of Changes To Accumulated Other Comprehensive Income (Loss)) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
In Millions, unless otherwise specified			Cash Flow Hedges - Interest Rate Swap [Member]	Cash Flow Hedges - Interest Rate Swap [Member]	Defined Benefit Pension and OPEB Plans [Member]	Defined Benefit Pension and OPEB Plans [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'	'	'	'	'
Balance at beginning of period	($47)	($48)	($26)	($28)	($22)	($3)	($48)	($31)
Defined benefit pension plans (net of tax)	'	'	'	'	-1	-1	-1	-1
Amounts reclassified from accumulated other comprehensive income (loss) and reported in interest expense and related charges	'	'	2	3	'	'	2	3
Balance at end of period	($47)	($48)	($24)	($25)	($23)	($4)	($47)	($29)

Pension_and_Other_Postretireme2

Pension and Other Postretirement Employee Benefits Plans (Narrative) (Details) (USD $)

0 Months Ended

6 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Jul. 01, 2014

Jun. 30, 2014

Sep. 30, 2014

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Jul. 01, 2014

Sep. 30, 2014

Jul. 01, 2014

item

Oncor Retirement Plan [Member]

EFH Retirement Plan [Member]

Pension Plan [Member]

Pension Plan [Member]

Pension Plan [Member]

Pension Plan [Member]

OPEB Plan [Member]

OPEB Plan [Member]

OPEB Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of defined pension plans in which the Company participates

'

'

2

'

'

'

'

'

'

'

'

'

'

Unfunded liability

'

'

'

'

'

$104

'

'

'

'

'

'

'

Increase (decrease) in projected benefit obligation

'

'

'

'

'

'

'

'

'

'

75

'

'

Increase (decrease) in projected benefit obligation, percentage

'

'

'

'

'

'

'

'

'

'

'

'

8.00%

Increase (decrease) in fair value of assets

'

'

'

'

'

'

'

'

'

'

3

'

'

Increase (decrease) in fair value of assets, percentage

'

'

'

'

'

'

'

'

'

'

'

'

2.00%

Increase (decrease) in regulatory assets

'

'

'

'

'

'

'

'

'

'

'

'

64

Increase (decrease) in regulatory assets, percentage

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

Discount rate

4.39%

4.98%

'

'

4.72%

5.07%

'

'

'

'

'

4.39%

'

Expected return on plan assets

'

'

'

7.05%

6.48%

6.17%

'

'

'

'

'

7.05%

'

Cash contributions

'

'

'

'

'

'

'

'

67

'

'

12

'

Amortization of net actuarial loss

'

'

'

'

'

'

-9

-17

-29

-52

'

'

'

Additional cash contributions

'

'

'

'

'

'

'

'

1

'

'

5

'

Regulatory assets

'

'

$1,681

$1,771

'

'

'

'

'

'

'

'

'

Pension_and_Other_Postretireme3

Pension and Other Postretirement Employee Benefits Plans (Recognized Net Periodic Pension And Benefit Costs) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Net costs	$27	$32	$78	$98
Less amounts deferred principally as property or a regulatory asset	-18	-23	-51	-71
Net amounts recognized as expense	9	9	27	27
Pension Plan [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost	6	6	18	18
Interest cost	33	31	99	92
Expected return on assets	-34	-31	-102	-91
Amortization of net loss	9	17	29	52
Net costs	14	23	44	71
OPEB [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost	2	1	5	4
Interest cost	11	9	33	28
Expected return on assets	-3	-3	-9	-9
Amortization of prior service costs	-5	-5	-15	-15
Amortization of net loss	8	7	20	19
Net costs	$13	$9	$34	$27

RelatedParty_Transactions_Narr

Related-Party Transactions (Narrative) (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Jun. 30, 2014

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

TCEH [Member]

TCEH [Member]

TCEH [Member]

TCEH [Member]

TCEH [Member]

EFH Corp [Member]

EFH Corp [Member]

EFH Corp [Member]

EFH Corp [Member]

EFH Corp [Member]

Maximum [Member]

Maximum [Member]

EFH Corp [Member]

EFH Corp [Member]

Related Party Transaction [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Revenue from related party

$281

$273

$746

$728

'

$1

$1

$1

$1

'

'

'

'

'

'

'

'

Amounts receivable from affiliates

152

'

152

'

135

'

'

'

'

'

'

'

'

'

'

'

'

Unbilled Receivables related to affiliate

47

'

47

'

56

'

'

'

'

'

'

'

'

'

'

'

'

Administrative and services costs

'

'

'

'

'

'

'

'

'

'

'

'

7

22

22

'

'

Shared facilities expense

'

'

'

'

'

'

'

'

'

'

'

1

1

3

3

'

'

Shared facilities payments received

'

'

'

'

'

'

'

'

'

'

'

'

'

2

1

1

1

Reimbursement payment amount

'

'

'

'

'

'

'

'

'

'

1

'

'

'

'

'

'

Delivery fee surcharges

'

'

'

'

'

5

5

13

12

'

'

'

'

'

'

'

'

Letter of credit

'

'

'

'

'

$9

'

$9

'

$9

'

'

'

'

'

'

'

RelatedParty_Transactions_Sche

Related-Party Transactions (Schedule Of Accounts Receivable From Related Party) (Details) (EFH Corp [Member], USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
EFH Corp [Member]	'	'
Related Party Transaction [Line Items]	'	'
Trade accounts and other receivables from affiliates	$157	$141
Trade accounts and other payables to affiliates	-5	-6
Trade accounts and other receivables from affiliates - net	$152	$135

RelatedParty_Transactions_Amou

Related-Party Transactions (Amounts Payable To (Receivable From) Members In Lieu Of Income Taxes) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Related Party Transaction [Line Items]	'	'
Federal income taxes receivable	'	($23)
Federal income taxes payable	47	'
Texas margin taxes payable	18	23
Total payable (receivable)	65	'
EFH Corp [Member]	'	'
Related Party Transaction [Line Items]	'	'
Federal income taxes receivable	'	-18
Federal income taxes payable	38	'
Texas margin taxes payable	18	23
Total payable (receivable)	56	5
Texas Transmission and Investment LLC [Member]	'	'
Related Party Transaction [Line Items]	'	'
Federal income taxes receivable	'	-5
Federal income taxes payable	9	'
Total payable (receivable)	$9	($5)

RelatedParty_Transactions_Cash

Related-Party Transactions (Cash Payments Made To (Received From) Members In Lieu Of Income Taxes) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Related Party Transaction [Line Items]	'	'
Federal income taxes	$175	$52
Texas margin taxes	23	12
Total payments (receipts)	198	64
EFH Corp [Member]	'	'
Related Party Transaction [Line Items]	'	'
Federal income taxes	140	48
Texas margin taxes	23	12
Total payments (receipts)	163	60
Texas Transmission and Investment LLC [Member]	'	'
Related Party Transaction [Line Items]	'	'
Federal income taxes	35	4
Total payments (receipts)	$35	$4

Supplementary_Financial_Inform2

Supplementary Financial Information (Narrative) (Details) (USD $)

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Dec. 31, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2014

Dec. 31, 2013

TCEH [Member]

TCEH [Member]

Nonaffiliated REP [Member]

Nonaffiliated REP [Member]

Sales [Member]

Sales [Member]

Sales [Member]

Sales [Member]

Sales [Member]

Sales [Member]

Nonaffiliated Trade Accounts Receivable [Member]

Nonaffiliated Trade Accounts Receivable [Member]

TCEH [Member]

TCEH [Member]

TCEH [Member]

TCEH [Member]

Nonaffiliated REP [Member]

Nonaffiliated REP [Member]

Nonaffiliated REP [Member]

Nonaffiliated REP [Member]

Supplemental Financial Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Concentration Risk Percentage

'

'

'

'

'

26.00%

28.00%

16.00%

15.00%

27.00%

28.00%

26.00%

28.00%

17.00%

16.00%

14.00%

12.00%

Unbilled revenue

$165

'

$165

'

$180

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate amortization expenses

15

8

42

38

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill

4,064

'

4,064

'

4,064

'

'

'

'

'

'

'

'

'

'

'

'

Uncertain tax positions related to timing of recognition

19

'

19

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in liability for deferred income taxes

15

'

15

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reversal of provision in lieu of income taxes

2

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reversal of accrued interest and tax

2

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reversal of accrued interest and tax after tax

$1

'

$1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Supplementary_Financial_Inform3

Supplementary Financial Information (Schedule Of Other Income And Deductions) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Supplementary Financial Information [Abstract]	'	'	'	'
Accretion of fair value adjustment (discount) to regulatory assets due to purchase accounting	$3	$4	$9	$14
Other	'	'	1	'
Total other income	3	4	10	14
Professional fees	3	2	10	8
Other	1	'	1	3
Total other deductions	$4	$2	$11	$11

Supplementary_Financial_Inform4

Supplementary Financial Information (Schedule Of Interest Expense And Related Charges) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Supplementary Financial Information [Abstract]	'	'	'	'
Interest expense	$89	$90	$267	$270
Amortization of debt issuance costs and discounts	1	6	2	21
Allowance for funds used during construction - capitalized interest portion	-1	-2	-3	-8
Total interest expense and related charges	$89	$94	$266	$283

Supplementary_Financial_Inform5

Supplementary Financial Information (Schedule Of Trade Accounts Receivable) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Supplementary Financial Information [Abstract]	'	'
Gross trade accounts receivable	$626	$527
Trade accounts receivable from TCEH	-154	-139
Allowance for uncollectible accounts	-3	-3
Trade accounts receivable from nonaffiliates - net	$469	$385

Supplementary_Financial_Inform6

Supplementary Financial Information (Summary of Investment Balance) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Supplementary Financial Information [Abstract]	'	'
Assets related to employee benefit plans, including employee savings programs	$93	$88
Land	3	3
Total investments and other property	$96	$91

Supplementary_Financial_Inform7

Supplementary Financial Information (Schedule Of Property, Plant And Equipment) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Supplementary Financial Information [Abstract]	'	'
Total assets in service	$17,938	$17,056
Less accumulated depreciation	6,030	5,725
Net of accumulated depreciation	11,908	11,331
Construction work in progress	347	556
Held for future use	15	15
Property, plant and equipment - net	$12,270	$11,902

Supplementary_Financial_Inform8

Supplementary Financial Information (Schedule Of Intangible Assets) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$874	$825
Accumulated Amortization	313	271
Net	561	554
Land Easements [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	452	440
Accumulated Amortization	85	82
Net	367	358
Capitalized Software [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	422	385
Accumulated Amortization	228	189
Net	$194	$196

Supplementary_Financial_Inform9

Supplementary Financial Information (Schedule Of Estimated Aggregate Amortization Expenses) (Details) (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Supplementary Financial Information [Abstract]	'
2014	$58
2015	60
2016	57
2017	49
2018	$45

Recovered_Sheet3

Supplementary Financial Information (Schedule Of Other Noncurrent Liabilities And Deferred Credits) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Supplementary Financial Information [Abstract]	'	'
Retirement plans and other employee benefits	$1,434	$1,399
Uncertain tax positions (including accrued interest)	37	56
Amounts payable to members related to income taxes	17	17
Investment tax credits	18	20
Other	72	62
Total other noncurrent liabilities and deferred credits	$1,578	$1,554

Recovered_Sheet4

Supplementary Financial Information (Schedule Of Supplemental Cash Flow Information) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013
Supplementary Financial Information [Abstract]	'		'
Interest	$296		$300
Capitalized interest	-3		-8
Interest (net of amounts capitalized)	293		292
Federal	175	[1]	52	[1]
State	23	[1]	12	[1]
Total amount is lieu of income taxes	198	[1]	64	[1]
Noncash construction expenditures	$34	[2]	$55	[2]
[1]	See Note 10 for additional information regarding income taxes.
[2]	Represents end-of-period accruals.