Oncor Electric Delivery 10-K 28 Feb 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Feb. 27, 2014	Feb. 27, 2014	Feb. 27, 2014
		Oncor's Management and Board of Directors [Member]	Oncor Electric Delivery Holdings Company LLC [Member]	Texas Transmission and Investment LLC [Member]
Entity Registrant Name	'ONCOR ELECTRIC DELIVERY CO LLC	'	'	'
Entity Central Index Key	'0001193311	'	'	'
Document Type	'10-K	'	'	'
Document Period End Date	31-Dec-13	'	'	'
Amendment Flag	'false	'	'	'
Document Fiscal Year Focus	'2013	'	'	'
Document Fiscal Period Focus	'FY	'	'	'
Current Fiscal Year End Date	'--12-31	'	'	'
Entity Filer Category	'Non-accelerated Filer	'	'	'
Entity Common Stock, Shares Outstanding	0	'	'	'
Entity Outstanding Membership Interests	'	0.22%	80.03%	19.75%
Entity Current Reporting Status	'No	'	'	'
Entity Well-known Seasoned Issuer	'No	'	'	'
Entity Voluntary Filers	'No	'	'	'
Entity Public Float	$0	'	'	'

Condensed_Statements_of_Consol

Condensed Statements of Consolidated Income (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating revenues:	'	'	'
Nonaffiliates	$2,585	$2,366	$2,092
Affiliates	967	962	1,026
Total operating revenues	3,552	3,328	3,118
Operating expenses:	'	'	'
Wholesale transmission service	588	502	439
Operation and maintenance	681	669	658
Depreciation and amortization	814	771	719
Provision in lieu of income taxes (Note 3 and 11)	247	240	209
Taxes other than amounts related to income taxes	424	415	400
Total operating expenses	2,754	2,597	2,425
Operating income	798	731	693
Other income and deductions:	'	'	'
Other income (Note 12)	18	26	30
Other deductions (Note 12)	15	64	9
Nonoperating provision in lieu of income taxes (Note 3)	2	-6	20
Interest income	4	24	32
Interest expense and related charges (Note 12)	371	374	359
Net income	$432	$349	$367

Condensed_Statements_of_Consol1

Condensed Statements of Consolidated Comprehensive Income (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Statements of Consolidated Comprehensive Income [Abstract]	'	'	'
Net income	$432	$349	$367
Cash flow hedges (Notes 1 and 6):	'	'	'
Net decrease in fair value of derivatives (net of tax benefit of $-, $-, and $17)	'	'	-29
Derivative value net loss recognized in net income (net of tax benefit of $1, $1 and $-)	2	3	'
Total cash flow hedges	2	3	-29
Defined benefit pension plans (net of tax benefit of $11, $1 and $-) (Note 9)	-19	-3	'
Total other comprehensive income (loss)	-17	'	-29
Comprehensive income	$415	$349	$338

Recovered_Sheet1

Condensed Statements Of Consolidated Comprehensive Income (Parenthetical) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Statements of Consolidated Comprehensive Income [Abstract]	'	'	'
Cash flow hedges - derivative value net loss recognized in net income, tax benefit	'	'	$17
Cash flow hedges - derivative value net loss recognized in net income, tax benefit	1	1	'
Defined benefit pension plans- net tax benefit	$11	$1	'

Condensed_Statements_of_Consol2

Condensed Statements of Consolidated Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows - operating activities:	'	'	'
Net income	$432	$349	$367
Adjustments to reconcile net income to cash provided by operating activities:	'	'	'
Depreciation and amortization	848	802	732
Provision in lieu of deferred income taxes - net	194	208	258
Other - net	-4	-4	-3
Changes in operating assets and liabilities:	'	'	'
Accounts receivable - trade (including affiliates)	-129	52	-36
Inventories	9	-3	25
Accounts payable - trade (including affiliates)	38	-9	17
Deferred revenues (Note 4)	-53	-101	-7
Other - assets	172	-17	111
Other - liabilities	-137	-8	-169
Cash provided by operating activities	1,370	1,269	1,295
Cash flows - financing activities:	'	'	'
Issuance of long-term debt (Note 6)	100	900	300
Repayments of long-term debt (Note 6)	-125	-1,018	-113
Net increase in short-term borrowings (Note 5)	10	343	15
Distributions to members (Note 8)	-310	-225	-145
Decrease in note receivable from TCEH (Note 11)	'	20	40
Sale of related-party agreements (Note 11)	'	159	'
Debt discount, premium, financing and reacquisition expenses - net	1	-46	-17
Other-net	'	-1	'
Cash (used in) provided by financing activities	-324	132	80
Cash flows - investing activities:	'	'	'
Capital expenditures	-1,079	-1,389	-1,362
Other - net	15	21	-34
Cash used in investing activities	-1,064	-1,368	-1,396
Net change in cash and cash equivalents	-18	33	-21
Cash and cash equivalents - beginning balance	45	12	33
Cash and cash equivalents - ending balance	$27	$45	$12

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Millions, unless otherwise specified
Current assets:	'		'
Cash and cash equivalents	$27		$45
Restricted cash - Bondco (Note 12)	52		55
Trade accounts receivable from nonaffiliates - net (Note 12)	385		338
Trade accounts and other receivables from affiliates (Note 11)	135		53
Amounts receivable from members related to income taxes (Note 11)	23		'
Materials and supplies inventories - at average cost	65		73
Prepayments and other current assets	79		79
Total current assets	766		643
Restricted cash - Bondco (Note 12)	16		16
Investments and other property (Note 12)	91		83
Property, plant and equipment - net (Note 12)	11,902		11,318
Goodwill (Notes 1 and 12)	4,064		4,064
Other noncurrent assets	71		78
Total assets	18,234		17,990
Current liabilities:	'		'
Short-term borrowings (Note 5)	745		735
Long-term debt due currently - Bondco (Note 6)	131		125
Trade accounts payable	178		121
Amounts payable to members related to income taxes (Note 11)	23		22
Accrued taxes other than amounts related to income	169		153
Accrued interest	95		95
Other current liabilities	135		109
Total current liabilities	1,476		1,360
Long-term debt, less amounts due currently (Note 6)	5,381		5,400
Liability in lieu of deferred income taxes (Notes 1, 3 and 11)	2,414		2,180
Other noncurrent liabilities and deferred credits (Note 11 and 12)	1,554		1,746
Total liabilities	10,825		10,686
Commitments and contingencies (Note 7)	'		'
Membership interests (Note 8):	'		'
Capital account - number of interests outstanding 2013 and 2012 - 635,000,000	7,457		7,335
Accumulated other comprehensive loss	-48		-31
Total membership interests	7,409		7,304
Total liabilities and membership interests	18,234		17,990
Oncor [Member]	'		'
Current assets:	'		'
Regulatory assets - net (Note 4)	1,098		1,453
Current liabilities:	'		'
Long-term debt, less amounts due currently (Note 6)	5,202	[1]	5,090	[1]
Bondco [Member]	'		'
Current assets:	'		'
Regulatory assets - net (Note 4)	226		335
Current liabilities:	'		'
Long-term debt due currently - Bondco (Note 6)	131	[2]	125	[2]
Long-term debt, less amounts due currently (Note 6)	$179	[2]	$310	[2]
[1]	Secured by first priority lien on certain transmission and distribution assets equally and ratably with all of Oncorbs other secured indebtedness. See bDeed of Trustb below 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)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]	'	'	'
Capital account, interests outstanding	635,000,000	635,000,000	635,000,000

Statements_Of_Consolidated_Mem

Statements Of Consolidated Membership Interests (USD $)	3 Months Ended						12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012		Mar. 31, 2012		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Capital account:	'	'	'		'		'	'	'
Balance at beginning of period	'	$7,335	'		$7,212		$7,335	$7,212	$6,990
Net income	103	87	28	[1]	75	[1]	432	349	367
Distributions to members	'	'	'		'		-310	-225	-145
Sale of related-party agreements (net of tax benefit of $-, $1 and $-) (Note 11)	'	'	'		'		'	-2	'
Other	'	'	'		'		'	1	'
Balance at end of period (number of interests outstanding: 2013, 2012 and 2011 - 635 million)	7,457	'	7,335		'		7,457	7,335	7,212
Accumulated other comprehensive income (loss) net of tax effects:	'	'	'		'		'	'	'
Balance at beginning of period	'	-31	'		-31		-31	-31	-2
Net effects of cash flow hedges (net of tax expense (benefit) of $1, $1 and $(17))	'	'	'		'		2	3	-29
Defined benefit pension plans (net of tax benefit of $11, $1 and $-) (Note 9)	'	'	'		'		-19	-3	'
Balance at end of period	-48	'	-31		'		-48	-31	-31
Total membership interests at end of period	$7,409	'	$7,304		'		$7,409	$7,304	$7,181
[1]	Fourth quarter 2012 reflects a $57 million pre-tax charge to expense associated with the SARs settlement (see Note 10).

Statements_Of_Consolidated_Mem1

Statements Of Consolidated Membership Interests (Parenthetical) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statements Of Consolidated Membership Interest [Abstract]	'	'	'
Sale of related-party agreements, tax benefit	'	$1	'
Interests outstanding	635,000,000	635,000,000	635,000,000
Net effects of cash flow hedges, tax expense (benefit)	1	1	-17
Defined benefit pension plans- net tax benefit	$11	$1	'

Description_Of_Business_and_Si

Description Of Business and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Description Of Business and Significant Accounting Policies [Abstract]	'
DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES	'
	1.    DESCRIPTION OF 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 27%, 29% and 33% of our total operating revenues for the years ended December 31, 2013, 2012 and 2011, 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 VIE (see Note 12).  This financing subsidiary was organized for the limited purpose of issuing certain transition bonds to recover generation-related regulatory asset stranded costs and other qualified costs under an order issued by the PUCT in 2002.  Bondco issued an aggregate $1.3 billion principal amount of transition bonds during 2003 and 2004.
	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 the event of 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.
	As noted in SEC filings made by members of the Texas Holdings Group, EFH Corp. and other members of the Texas Holdings Group have engaged in discussions with certain unaffiliated creditors regarding certain of those entities’ capital structures and long-term liquidity, as well as possible restructuring transactions involving those entities.  We believe the “ring-fencing” measures discussed above mitigate our exposure to a bankruptcy or other restructuring transaction involving members of the Texas Holdings Group.
	Basis of Presentation
	Our consolidated financial statements have been prepared in accordance with US GAAP and on the same basis as the audited financial statements in our Annual Report on Form 10-K for the year ended December 31, 2012.  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.  All dollar amounts in the financial statements and tables in the notes are stated in millions of US dollars unless otherwise indicated.
	Consolidation of Variable Interest Entities
	A VIE is an entity with which we have a relationship or arrangement that indicates some level of control over the entity or results in economic risks to us.  We consolidate a VIE if we have: a) the power to direct the significant activities of the VIE and b) the right or obligation to absorb profit and loss from the VIE (primary beneficiary).  See Note 12.
	Income Taxes
	EFH Corp. files a consolidated federal income tax return.  Effective with the November 2008 sale of equity interests to Texas Transmission and Investment LLC, we became a partnership for US federal income tax purposes, and subsequently we are not a member of EFH Corp.’s consolidated tax group and only EFH Corp.’s share of our partnership income is included in its consolidated federal income tax return.  Our tax sharing agreement with Oncor Holdings and EFH Corp. was amended in November 2008 to include Texas Transmission and Investment LLC.  The tax sharing agreement provides for the calculation of tax liability substantially as if we and Oncor Holdings were taxed as corporations, and requires tax payments to members determined on that basis (without duplication for any income taxes paid by a subsidiary of Oncor Holdings).  Accordingly, while partnerships are not subject to income taxes, in consideration of the tax sharing agreement and the presentation of our financial statements as an entity subject to cost-based regulatory rate-setting processes, with such costs including income taxes, the financial statements present amounts determined under the tax sharing agreement as “provision in lieu of income taxes” and “liability in lieu of deferred income taxes” for periods subsequent to the sales of equity interests discussed in Note 3.
	Such amounts are determined in accordance with the provisions of accounting guidance for income taxes and for uncertainty in income taxes and thus differences between the book and tax bases of assets and liabilities are accounted for as if we were taxed as a corporation.  The accounting guidance for rate-regulated enterprises requires the recognition of regulatory assets or liabilities if it is probable such deferred tax amounts will be recovered from, or returned to customers in future rates.  Investment tax credits are amortized to income over the estimated lives of the related properties.
	We classify interest and penalties expense related to uncertain tax positions as current provision in lieu of income taxes as discussed in Note 3.
	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.  No material adjustments were made to previous estimates or assumptions during the current year.
	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.
	Revenue Recognition
	Revenue includes an estimate for electricity delivery services provided from the billed meter reading date to the end of the period (unbilled revenue).  For electricity delivery services billed on the basis of kWh volumes, unbilled revenue is based on data collected through our AMS.    For other electricity delivery services, unbilled revenue is based on average daily revenues for the most recent period applied to the number of unmetered days through the end of the period.
	Impairment of Long-Lived Assets and Goodwill
	We evaluate long-lived assets (including intangible assets with finite lives) for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable.
	We also evaluate goodwill for impairment annually (at December 1) or whenever events or changes in circumstances indicate that an impairment may exist.
	Goodwill impairment tests performed in 2013 and 2012 were based on determinations of enterprise value using discounted cash flow analyses, comparable company equity values and any relevant transactions indicative of enterprise values (quantitative assessment).  The test performed in 2011 was based on a qualitative assessment in which we considered macroeconomic conditions, industry and market considerations, cost factors, overall financial performance and other relevant events.  No impairments were recognized in 2013, 2012 or 2011.
	System of Accounts
	Our accounting records have been maintained in accordance with the FERC Uniform System of Accounts as adopted by the PUCT.
	Defined Benefit Pension Plans and Other Postretirement Employee Benefit (OPEB) Plans
	We have liabilities under pension plans that offer benefits based on either a traditional defined benefit formula or a cash balance formula and the OPEB Plan that offers certain health care and life insurance benefits to eligible employees and their eligible dependents upon the retirement of such employees from the company.  Costs of pension and OPEB plans are dependent upon numerous factors, assumptions and estimates.  In 2012, EFH Corp. made various changes to the EFH Retirement Plan, including splitting off into a new plan all of the assets and liabilities associated with Oncor employees and all retirees and terminated vested participants of EFH Corp. and its subsidiaries (including discontinued businesses).  See Note 9 for additional information regarding the pension plans and the OPEB Plan.
	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.
	Fair Value of Nonderivative Financial Instruments
	The carrying amounts for financial assets classified as current assets and the carrying amounts for financial liabilities classified as current liabilities approximate fair value due to the short maturity of such instruments.  The fair values of other financial instruments, for which carrying amounts and fair values have not been presented, are not materially different than their related carrying amounts.  The following discussion of fair value accounting standards applies primarily to our determination of the fair value of assets in the pension and OPEB plan trusts (see Note 9) and long-term debt (see Note 6).
	Accounting standards related to the determination of fair value define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.  We use a “mid-market” valuation convention (the mid-point price between bid and ask prices) as a practical expedient to measure fair value for the majority of our assets and liabilities subject to fair value measurement on a recurring basis.  We primarily use the market approach for recurring fair value measurements and use valuation techniques to maximize the use of observable inputs and minimize the use of unobservable inputs.
	We categorize our assets and liabilities recorded at fair value based upon the following fair value hierarchy:
		·	Level 1 valuations use quoted prices in active markets for identical assets or liabilities that are accessible at the measurement date.  An active market is a market in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis.
		·	Level 2 valuations use inputs that, in the absence of actively quoted market prices, are observable for the asset or liability, either directly or indirectly.  Level 2 inputs include: (a) quoted prices for similar assets or liabilities in active markets, (b) quoted prices for identical or similar assets or liabilities in markets that are not active, (c) inputs other than quoted prices that are observable for the asset or liability such as interest rates and yield curves observable at commonly quoted intervals and (d) inputs that are derived principally from or corroborated by observable market data by correlation or other means.  Our Level 2 valuations utilize over-the-counter broker quotes, quoted prices for similar assets or liabilities that are corroborated by correlations or other mathematical means and other valuation inputs.
		·	Level 3 valuations use unobservable inputs for the asset or liability.  Unobservable inputs are used to the extent observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date.  We use the most meaningful information available from the market combined with internally developed valuation methodologies to develop our best estimate of fair value.
	We utilize several different valuation techniques to measure the fair value of assets and liabilities, relying primarily on the market approach of using prices and other market information for identical and/or comparable assets and liabilities for those items that are measured on a recurring basis.
	Franchise Taxes
	Franchise taxes are assessed to us by local governmental bodies, based on kWh delivered and are the principal component of taxes other than amounts related to income taxes as reported in the income statement.  Franchise taxes are not a “pass through” item.  The rates we charge customers are intended to recover the franchise taxes, but we are not acting as an agent to collect the taxes from customers.
	Cash and Cash Equivalents
	For purposes of reporting cash and cash equivalents, temporary cash investments purchased with a remaining maturity of three months or less are considered to be cash equivalents.  See Note 12 for details regarding restricted cash.
	Property, Plant and Equipment
	Properties are stated at original cost. The cost of self-constructed property additions includes materials and both direct and indirect labor and applicable overhead and an allowance for funds used during construction.
	Depreciation of property, plant and equipment is calculated on a straight-line basis over the estimated service lives of the properties based on depreciation rates approved by the PUCT.  As is common in the industry, depreciation expense is recorded using composite depreciation rates that reflect blended estimates of the lives of major asset groups as compared to depreciation expense calculated on a component asset-by-asset basis.  Depreciation rates include plant removal costs as a component of depreciation expense, consistent with regulatory treatment.  Actual removal costs incurred are charged to accumulated depreciation.  When accrued removal costs exceed incurred removal costs, the difference is reclassified as a regulatory obligation to retire assets in the future.
	Allowance for Funds Used During Construction (AFUDC)
	AFUDC is a regulatory cost accounting procedure whereby both interest charges on borrowed funds and a return on equity capital used to finance construction are included in the recorded cost of utility plant and equipment being constructed.  AFUDC is capitalized on all projects involving construction periods lasting greater than thirty days.  The equity portion of capitalized AFUDC is accounted for as other income.  We recorded $1 million of equity AFUDC in the year ended December 31, 2012 and none in the years ended December 31, 2013 and 2011.  See Note 12 for detail of amounts charged to interest expense.
	Regulatory Assets and Liabilities
	Our financial statements reflect regulatory assets and liabilities under cost-based rate regulation in accordance with accounting standards related to the effect of certain types of regulation.  Regulatory decisions can have an impact on the recovery of costs, the rate earned on invested capital and the timing and amount of assets to be recovered by rates.  See Note 4 for details of regulatory assets and liabilities.

Regulatory_Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2013
Regulatory Matters [Abstract]	'
REGULATORY MATTERS	'
	2.    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.  In November 2009, the PUCT issued an order on rehearing that established a new rate class but did not change the revenue requirements.  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.  Oral argument before the Austin Court of Appeals was completed in April 2012.  There is no deadline for the court to act.  We are unable to predict the outcome of the appeal.
	We are involved in various other regulatory 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.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Taxes [Abstract]	'
INCOME TAXES	'
	3.    INCOME TAXES
	The components of our reported provision (benefit) in lieu of income taxes are as follows:
		Year Ended December 31,
		2013		2012		2011
	Reported in operating expenses:
	Current:
	US federal	$	51	$	23	$	-55
	State		12		21		21
	Deferred:
	US federal		181		200		248
	State		6		-		-
	Amortization of investment tax credits		-3		-4		-5
	Total reported in operating expenses		247		240		209
	Reported in other income and deductions:
	Current:
	US federal		-5		-14		9
	State		-		-		1
	Deferred federal		7		8		10
	Total reported in other income and deductions		2		-6		20
	Total provision in lieu of income taxes	$	249	$	234	$	229
	Reconciliation of provision in lieu of income taxes computed at the US federal statutory rate to provision in lieu of income taxes:
		Year Ended December 31,
		2013		2012		2011
	Income before provision in lieu of income taxes	$	681	$	583	$	596
	Provision in lieu of income taxes at the US federal statutory rate of 35%	$	238	$	204	$	209
	Amortization of investment tax credits – net of deferred tax effect		-3		-4		-5
	Amortization (under regulatory accounting) of statutory tax rate changes		-2		-3		-3
	Amortization of Medicare subsidy regulatory asset		14		14		-
	Texas margin tax, net of federal tax benefit		15		14		14
	Nondeductible losses (gains) on benefit plan investments		-3		-2		-1
	Other, including audit settlements		-10		11		15
	Reported provision in lieu of income taxes	$	249	$	234	$	229
	Effective rate		36.6%		40.1%		38.4%
	The net amounts of $2.414 billion and $2.180 billion reported in the balance sheets at December 31, 2013 and 2012, respectively, as liability in lieu of deferred income taxes include amounts previously recorded as net deferred tax liabilities.  Upon the sale of equity interests to Texas Transmission and Investment LLC in 2008, we became a partnership for US federal income tax purposes, and the temporary differences that gave rise to the deferred taxes will, over time, become taxable to the equity holders.  Under a tax sharing agreement among us and our equity holders (see Note 1), we make payments to the equity holders for income taxes as the partnership earnings become taxable to the equity holders.  Accordingly, as the temporary differences become taxable, we will pay the equity holders.  In the unlikely event such amounts are not paid under the tax sharing agreement, it is probable that they would be reimbursed to rate payers.
	At December 31, 2013 and 2012, we had $21 million and $52 million of alternative minimum tax (AMT) credit carryforwards, respectively, available to offset future tax sharing payments.  The AMT credit carryforwards have no expiration date.  At December 31, 2013, we had $162 million of net operating loss (NOL) carryforwards for federal income tax purposes that expire between 2028 and 2030.  The NOL carryforwards relate to tax years under audit and can be used to offset future taxable income once the audits are complete.  We expect to use all of our NOL carryforwards prior to their expiration date.
	Accounting For Uncertainty in Income Taxes
	Prior to November 2008, we were a member of the EFH Corp. consolidated tax group.  Effective with the November 2008 sale of equity interests to Texas Transmission and Investment LLC, we became a partnership for US federal income tax purposes.  EFH Corp. and its subsidiaries file or have filed income tax returns in US federal, state and foreign jurisdictions and are subject to examinations by the IRS and other taxing authorities.  Examinations of EFH Corp. and its subsidiaries’ income tax returns for the years ending prior to January 1, 2007 are complete, but the tax years 2003 through 2006 remain in appeals with the IRS.  Texas franchise and margin tax returns are under examination or still open for examination for tax years beginning after 2006.  Subsequent to November 2008, we are not a member of the EFH Corp. consolidated tax group and assess our liability for uncertain tax positions in our partnership returns.
	We have been advised by EFH Corp. that approval by the Joint Committee on Taxation for the 1997 through 2002 IRS appeals settlement was received in May 2013 and that all issues contested have been resolved.  As a result, the liability for uncertain tax positions was reduced by $32 million in the second quarter of 2013.  This resolution also resulted in a $10 million net reduction to liability in lieu of deferred income taxes and a reversal of accrued interest and tax totaling $5 million ($3 million after tax), which is reported as a decrease in provision in lieu of income taxes.  We made a cash payment of $33 million to EFH Corp. in the third quarter of 2013, as required under the tax sharing agreement, to settle the liability resulting from the 1997 through 2002 IRS audit, and received a $10 million refund from EFH Corp. as a result of filing amended Texas franchise tax returns for 1997 through 2001.
	The IRS audit for the years 2003 through 2006 was concluded in June 2011.  A significant number of adjustments to the originally filed returns for such years were proposed.  In March 2013, EFH Corp. and the IRS agreed on terms to resolve the disputed adjustments.  In the first quarter of 2013, we reduced the liability for uncertain tax positions by $76 million to reflect the terms of the agreement.  This reduction consisted of a $58 million increase to liability in lieu of deferred income taxes and a reversal of accrued interest and tax totaling $18 million ($12 million after tax), which is reported as a decrease in provision in lieu of income taxes.  In the fourth quarter of 2013, the 2003 through 2006 state tax positions were remeasured, which resulted in a net reversal of accrued interest and tax totaling $3 million.  Any cash income tax impact related to the conclusion of the 2003 through 2006 audit is expected to be immaterial.
	The following table summarizes the changes to the uncertain tax positions, reported in other noncurrent liabilities in our consolidated balance sheet, during the years ended December 31, 2013, 2012 and 2011:
		2013		2012		2011
	Balance at January 1, excluding interest and penalties	$	144	$	126	$	82
	Additions based on tax positions related to prior years		-		18		44
	Reductions based on tax positions related to prior years (a)		-66		-		-
	Reduction related to 1997-2002 IRS appeals settlement		-24		-		-
	Balance at December 31, excluding interest and penalties	$	54	$	144	$	126
	_________
	(a)Includes IRS audit for the years 2003 through 2006.
	Of the balances at December 31, 2013 and 2012, $51 million and $133 million, respectively, represent tax positions for which the uncertainty relates to the timing of recognition for tax purposes.  The disallowance of such positions would not affect the effective tax rate, but would accelerate the payment of cash under the tax sharing agreement to an earlier period.
	Noncurrent liabilities included a total of $2 million and $25 million in accrued interest at December 31, 2013 and 2012, respectively.  Amounts recorded related to interest and penalties totaled a benefit of $15 million in the year ended December 31, 2013 and an expense of $3 million and $2 million in the years ended December 31, 2012 and 2011, respectively (all amounts after tax).  The federal income tax benefit on the interest accrued on uncertain tax positions is recorded as liability in lieu of deferred income taxes.
	With respect to tax positions for which the ultimate deductibility is uncertain (permanent items), should EFH Corp. or we sustain such positions on income tax returns previously filed, our liabilities recorded would be reduced by $3 million, resulting in increased net income and a favorable impact on the effective tax rate.

Regulatory_Assets_and_Liabilit

Regulatory Assets and Liabilities	12 Months Ended
	Dec. 31, 2013
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
			31-Dec-13		31-Dec-13		31-Dec-12
	Regulatory assets:
	Generation-related regulatory assets securitized		2 years		$	281	$	409
	by transition bonds (a)(e)
	Employee retirement costs		6 years			71		87
	Employee retirement costs to be reviewed (b)(c)		To be determined			224		186
	Employee retirement liability (a)(c)(d)		To be determined			491		738
	Self-insurance reserve (primarily storm recovery		6 years			158		190
	costs) ― net
	Self-insurance reserve to be reviewed (b)(c)		To be determined			196		128
	Securities reacquisition costs (pre-industry restructure)		3 years			32		41
	Securities reacquisition costs		Terms of related debt			5		22
	(post-industry restructure) ― net
	Recoverable amounts in lieu of deferred		Life of related asset or liability			42		71
	income taxes ― net
	Rate review expenses (a)		Largely 2 years			4		6
	Advanced meter customer education costs		6 years			8		10
	Deferred conventional meter and metering		Largely 7 years			146		152
	facilities depreciation
	Deferred AMS costs		6 years			62		2
	Energy efficiency performance bonus (a)		1 year			12		9
	Under-recovered wholesale transmission		1 year			37		40
	service expense ― net (a)
	Energy efficiency programs (a)		Not applicable			-		1
	Other regulatory assets		Various			2		1
	Total regulatory assets					1,771		2,093
	Regulatory liabilities:
	Estimated net removal costs		Life of utility plant			385		244
	Investment tax credit and protected excess		Various			23		28
	deferred taxes
	Over-collection of transition bond revenues (a)(e)		2 years			35		33
	Energy efficiency programs (a)		Not applicable			4		-
	Total regulatory liabilities					447		305
	Net regulatory asset				$	1,324	$	1,788
	____________
		(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 $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.  Bondco net regulatory assets of $335 million at December 31, 2012 consisted of $368 million included in generation-related regulatory assets net of the regulatory liability for over-collection of transition bond revenues of $33 million.
	In August 2011, the PUCT issued a final order in our rate review filed in January 2011.  The rate review included a determination of the recoverability of regulatory assets at June 30, 2010, including the recoverability period of those assets deemed allowable by the PUCT.
	In accordance with the PUCT’s August 2009 order in our rate review, the remaining net book value and the approved amount of removal cost of existing conventional meters that were replaced by advanced meters are being charged to depreciation and amortization expense over an 11-year cost recovery period.
	In September 2008, the PUCT approved a settlement for us to recover our estimated future investment for advanced metering deployment.  We began billing the AMS surcharge in the January 2009 billing month cycle.  The surcharge is expected to total $1.023 billion over the 11-year recovery period and includes a cost recovery factor of $2.19 per month per residential retail customer and $2.39 to $5.15 per month for non-residential retail customers.  We account for the difference between the surcharge billings for advanced metering facilities and the allowable revenues under the surcharge provisions, which are based on expenditures and an allowed return, as a regulatory asset or liability.  Such differences arise principally as a result of timing of expenditures.  As indicated in the table above, the regulatory asset at December 31, 2013 and 2012 totaled $62 million and $2 million, respectively.
	As a result of purchase accounting, in 2007 the carrying value of certain generation-related regulatory assets securitized by transition bonds, which have been reviewed and approved by the PUCT for recovery but without earning a rate of return, was reduced by $213 million.  This amount will be accreted to other income over the recovery period remaining at October 10, 2007 (approximately nine years).
	See Note 11 for information regarding nuclear decommissioning cost recovery.

Borrowings_Under_Credit_Facili

Borrowings Under Credit Facilities	12 Months Ended
	Dec. 31, 2013
Borrowings Under Credit Facilities And Long-Term Debt [Abstract]	'
BORROWINGS UNDER CREDIT FACILITIES	'
	5.    BORROWINGS UNDER CREDIT FACILITIES
	At December 31, 2013, 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 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.  At December 31, 2012, we had outstanding borrowings under the revolving credit facility totaling $735 million with an interest rate of 1.46% 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 December 31, 2013, all outstanding borrowings bore interest at LIBOR plus 1.50%.  Amounts borrowed under the 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 December 31, 2013, letters of credit bore interest at 1.70%, and a commitment fee (at a rate of 0.225% per annum) was payable on the unfunded commitments under the facility, each based on our current credit ratings.
	Subject to the limitations described below, borrowing capacity available under the credit facility at December 31, 2013 and 2012 was $1.649 billion and $1.659 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, 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 December 31, 2013, the available bond credits were approximately $2.176 billion and the amount of additional potential indebtedness that could be secured by property additions, subject to a certification process, was $1.173 billion.  At December 31, 2013, 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 December 31, 2013, we were in compliance with this covenant with a debt-to-capitalization ratio of 0.45 to 1.00 and with all other covenants.
	The revolving credit facility also contains customary events of default for facilities of this type, the occurrence of which would allow the lenders to accelerate all outstanding loans and terminate their commitments, including certain changes in control that are not permitted transactions, cross-default provisions in the event we or any of our subsidiaries (other than Bondco) defaults on indebtedness in a principal amount in excess of $100 million or receives judgments for the payment of money in excess of $50 million that are not discharged within 60 days.

LongTerm_Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2013
Borrowings Under Credit Facilities And Long-Term Debt [Abstract]	'
LONG-TERM DEBT	'
	6.    LONG-TERM DEBT
	At December 31, 2013 and 2012, our long-term debt consisted of the following:
		December 31,
		2013		2012
	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
	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		300
	5.300% Fixed Senior Notes due June 1, 2042		500		500
	Unamortized discount		-23		-35
	Long-term debt, less amounts due currently — Oncor		5,202		5,090
	Bondco (b):
	4.950% Fixed Series 2003 Bonds due in semiannual installments through February 15, 2013		-		10
	5.420% Fixed Series 2003 Bonds due in semiannual installments through August 15, 2015		106		145
	5.290% Fixed Series 2004 Bonds due in semiannual installments through May 15, 2016		205		281
	Unamortized fair value discount related to transition bonds		-1		-1
	Less amount due currently		-131		-125
	Long-term debt, less amounts due currently — Bondco		179		310
	Total long-term debt, less amounts due currently	$	5,381	$	5,400
	__________
	(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” below for additional information.
	(b)The transition bonds are nonrecourse to Oncor and were issued to securitize a regulatory asset.
	Debt-Related Activity in 2013
	Debt Repayments
	Repayments of long-term debt in 2013 totaled $125 million and represent transition bond principal payments at scheduled maturity dates.
	Issuance of New Senior Secured Notes
	In May 2013, we completed the sale of $100 million aggregate principal amount of 4.550% senior secured notes maturing in December 2041 (Additional 2041 Notes).  The Additional 2041 Notes were an additional issuance of our 4.550% senior secured notes maturing in December 2041, $300 million aggregate principal amount of which were previously issued in November 2011 (2041 Notes).  The Additional 2041 Notes were issued as part of the same series as the 2041 Notes.  We used the net proceeds of approximately $107 million from the sale of the Additional 2041 Notes to repay borrowings under our revolving credit facility and for general corporate purposes.  The Additional 2041 Notes and 2041 Notes are secured by the first priority lien and are secured equally and ratably with all of our other secured indebtedness as discussed below.
	Interest on the Additional 2041 Notes is payable in cash semiannually in arrears on June 1 and December 1 of each year, beginning on June 1, 2013.  We may at our option redeem the notes, in whole or in part, at any time, 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 Additional 2041 Notes were issued in a private placement, and in July 2013 we completed an offering with the holders of the Additional 2041 Notes to exchange their respective Additional 2041 Notes for notes that have terms identical in all material respects to the Additional 2041 Notes (Exchange Notes), except that the Exchange Notes do not contain terms with respect to transfer restrictions, registration rights and payment of additional interest for failure to observe certain obligations in a certain registration rights agreement.  The Exchange Notes were registered on a Form S-4, which was declared effective in June 2013.
	Debt-Related Activity in 2012
	Debt Repayments
	Repayments of long-term debt in 2012 totaled $1.018 billion and represented $376 million principal amount of 6.375% senior secured notes paid at the scheduled maturity date of May 1, 2012, the redemption of $524 million principal amount of 5.950% senior secured notes due September 1, 2013 (2013 Notes) as discussed below and $118 million principal amount of transition bonds paid at scheduled maturity dates.
	In June 2012, pursuant to the terms of the indenture and officer’s certificate governing the 2013 Notes, we redeemed all of the 2013 Notes.  We paid a redemption price equal to 100% of the principal amount of the 2013 Notes plus a make-whole amount of $33 million.  For accounting purposes, the make-whole amount was deferred as a regulatory asset and amortized to interest expense through September 1, 2013, the original maturity date of the 2013 Notes.
	Issuance of New Senior Secured Notes
	In May 2012, we issued $400 million aggregate principal amount of 4.100% senior secured notes maturing in June 2022 (2022 Notes) and $500 million aggregate principal amount of 5.300% senior secured notes maturing in June 2042 (2042 Notes, and collectively with the 2022 Notes, the Notes).  We used the proceeds (net of the initial purchasers’ discount, fees and expenses) of approximately $890 million from the sale of the Notes to repay borrowings under our revolving credit facility, redeem the 2013 Notes (as discussed above) and for other general corporate purposes.  The Notes are secured equally and ratably with all of our other secured indebtedness pursuant to the Deed of Trust by a first priority lien on property acquired or constructed for the transmission and distribution of electricity.
	Interest on the Notes is payable in cash semiannually in arrears on June 1 and December 1 of each year, beginning on December 1, 2012.  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 in August 2012 we offered holders of the Notes the opportunity to exchange their respective Notes for notes that have terms identical in all material respects to the Notes (Exchange Notes), except that the Exchange Notes do not contain terms with respect to transfer restrictions, registration rights and payment of additional interest for failure to observe certain obligations in a certain registration rights agreement.  The Exchange Notes were registered on a Form S-4, which was declared effective in July 2012.
	Deed of Trust
	Our secured indebtedness, including the revolving credit facility described in Note 5, is secured equally and ratably 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.  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 could be certified to the Deed of Trust collateral agent.  At December 31, 2013, the amount of available bond credits was approximately $2.176 billion and the amount of future debt we could secure with property additions, subject to those property additions being certified to the Deed of Trust collateral agent, was $1.173 billion.
	Maturities
	Long-term debt maturities at December 31, 2013, are as follows:
	Year		Amount
	2014		$	131
	2015			639
	2016			41
	2017			324
	2018			550
	Thereafter			3,851
	Unamortized fair value discount			-1
	Unamortized discount			-23
	Total		$	5,512
	Fair Value of Long-Term Debt
	At December 31, 2013 and 2012, the estimated fair value of our long-term debt (including current maturities) totaled $6.188 billion and $6.568 billion, respectively, and the carrying amount totaled $5.512 billion and $5.525 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	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies [Abstract]	'
COMMITMENTS AND CONTINGENCIES	'
	7.    COMMITMENTS AND CONTINGENCIES
	EFH Corp. Potential Restructuring Activities
	As noted in SEC filings made by members of the Texas Holdings Group, EFH Corp. and other members of the Texas Holdings Group have engaged in discussions with certain unaffiliated creditors regarding certain of those entities’ capital structures and long-term liquidity, as well as possible restructuring transactions involving those entities.  See Note 11 for a discussion of our transactions with members of the Texas Holdings Group that could potentially be impacted by any these restructuring activities.
	Leases
	At December 31, 2013, our future minimum lease payments under operating leases (with initial or remaining noncancelable lease terms in excess of one year) were as follows:
	Year		Amount
	2014		$		6
	2015				4
	2016				3
	2017				1
	2018				-
	Thereafter				-
	Total future minimum lease payments		$		14
	Rent charged to operation and maintenance expense totaled $10 million for the year ended December 31, 2013 and $15 million for each of the years ended December 31, 2012 and 2011.
	Efficiency Spending
	We are required to annually invest in programs designed to improve customer electricity demand efficiencies to satisfy ongoing regulatory requirements.  The 2014 requirement is $62 million.
	Guarantees
	We have entered into contracts that contain guarantees to unaffiliated parties that could require performance or payment under certain conditions as discussed below.
	We are the lessee under various operating leases that obligate us to guarantee the residual values of the leased assets.  At December 31, 2013, both the aggregate maximum amount of residual values guaranteed and the estimated residual recoveries totaled $7 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 2.2 years.
	For the purpose of obtaining greater access to materials, we previously guaranteed the repayment of borrowings under a nonaffiliated party’s $7 million credit facility.  The facility matured on March 31, 2013 and was not extended.
	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.
	Labor Contracts
	Certain of our employees are represented by a labor union and covered by a collective bargaining agreement with an expiration date of October 25, 2015.
	Environmental Contingencies
	We must comply with environmental laws and regulations applicable to the handling and disposal of hazardous waste.  We are in compliance with all current laws and regulations; however, the impact, if any, of changes to existing regulations or the implementation of new regulations is not determinable.  The costs to comply with environmental regulations can be significantly affected by the following external events or conditions:
		·		changes to existing state or federal regulation by governmental authorities having jurisdiction over control of toxic substances and hazardous and solid wastes, and other environmental matters, and
		·		the identification of additional sites requiring clean-up or the filing of other complaints in which we may be asserted to be a potential responsible party.

Membership_Interests

Membership Interests	12 Months Ended
	Dec. 31, 2013
Membership Interests [Abstract]	'
MEMBERSHIP INTERESTS	'
	8.    MEMBERSHIP INTERESTS
	Cash Distributions
	On February 19, 2014, our board of directors declared a cash distribution of $53 million, which was paid to our members on February 20, 2014.
	During 2013, our board of directors declared, and we paid the following cash distributions to our members:
	Declaration Date		Payment Date	Amount
	29-Oct-13		31-Oct-13	$	95
	31-Jul-13		1-Aug-13	$	95
	1-May-13		2-May-13	$	70
	13-Feb-13		15-Feb-13	$	50
	During 2012, our board of directors declared, and we paid the following cash distributions to our members:
	Declaration Date		Payment Date	Amount
	24-Oct-12		30-Oct-12	$	70
	25-Jul-12		31-Jul-12	$	50
	25-Apr-12		1-May-12	$	60
	14-Feb-12		21-Feb-12	$	45
	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 December 31, 2013, 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 December 31, 2013, $192 million was available for distribution to our members under the capital structure restriction.
	Accumulated Other Comprehensive Income (Loss)
	The following table presents the changes to accumulated other comprehensive income (loss) for the year ended December 31, 2013.
		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)		-		-19		-19
	Amounts reclassified from accumulated other comprehensive income (loss) and reported in interest expense and related charges		2		-		2
	Balance at December 31, 2013	$	-26	$	-22	$	-48

Pension_and_Other_Postretireme

Pension and Other Postretirement Employee Benefits Plans	12 Months Ended
	Dec. 31, 2013
Pension and Other Postretirement Employee Benefits Plans [Abstract]	'
PENSION AND OTHER POSTRETIREMENT EMPLOYEE BENEFITS PLANS	'
	9.    PENSION AND OTHER POSTRETIREMENT EMPLOYEE BENEFITS PLANS
	Regulatory Recovery of Pension and OPEB Costs
	PURA provides for our recovery of pension and OPEB costs applicable to services of our active and retired employees, as well as services of other EFH Corp. active and retired employees prior to the deregulation and disaggregation of EFH Corp.’s electric utility businesses effective January 1, 2002 (recoverable service).  Accordingly, we entered into an agreement with EFH Corp. whereby we assumed responsibility for applicable pension and OPEB costs related to those personnel’s recoverable service.
	We are authorized to establish a regulatory asset or liability for the difference between the amounts of pension and OPEB costs approved in current billing rates and the actual amounts that would otherwise have been recorded as charges or credits to earnings related to recoverable service.  Amounts deferred are ultimately subject to regulatory approval.  At December 31, 2013 and 2012, we had recorded regulatory assets totaling $786 million and $1.011 billion, respectively, related to pension and OPEB costs, including amounts related to deferred expenses as well as amounts related to unfunded liabilities that otherwise would be recorded as other comprehensive income.
	In a 2012 agreement described below, we assumed primary responsibility for retirement costs related to certain non-recoverable service.  Any retirement costs associated with non-recoverable service is not recoverable through rates.
	Pension Plan
	We have liabilities under the Oncor Retirement Plan and the EFH Retirement Plan, both of which are qualified pension plans under Section 401(a) of the Internal Revenue Code of 1986, as amended (Code), and are subject to the provisions of ERISA.  Employees do not contribute to either plan.  These pension plans provide benefits to participants under one of two formulas: (i) a Cash Balance Formula under which participants earn monthly contribution credits based on their compensation and a combination of their age and years of service, plus monthly interest credits or (ii) a Traditional Retirement Plan Formula based on years of service and the average earnings of the three years of highest earnings.  The interest component of the Cash Balance Formula is variable and is determined using the yield on 30-year Treasury bonds.  Under the Cash Balance Formula, future increases in earnings will not apply to prior service costs.
	All eligible employees hired after January 1, 2001 participate under the Cash Balance Formula.  Certain employees, who, prior to January 1, 2002, participated under the Traditional Retirement Plan Formula, continue their participation under that formula.  It is the sponsors’ policy to fund the plans on a current basis to the extent required under existing federal tax and ERISA regulations.
	In August 2012, EFH Corp. approved certain amendments to the EFH Retirement Plan.  These actions were completed in the fourth quarter of 2012, and the amendments resulted in:
		·		the splitting off of assets and liabilities under the plan associated with our employees and all retirees and terminated vested participants of EFH Corp. and its subsidiaries (including discontinued businesses) to a new qualified pension plan that provides benefits identical to those provided under the EFH Retirement Plan, for which we assumed sponsorship from EFH Corp. effective January 1, 2013 (Oncor Retirement Plan);
		·		maintaining assets and liabilities under the plan associated with active collective bargaining unit (union) employees of EFH Corp.'s competitive subsidiaries under the current plan;
		·		the splitting off of assets and liabilities under the plan associated with all other plan participants (active nonunion employees of EFH Corp.’s competitive businesses) to a terminating plan, freezing benefits and vesting all accrued plan benefits for these participants, and
		·		the termination of, distributions of benefits under, and settlement of all of EFH Corp.'s liabilities under the terminating plan.
	As a result of these actions and in connection with assuming sponsorship of the Oncor Retirement Plan, we entered into an agreement with EFH Corp. to assume primary responsibility for benefits of certain participants for whom EFH Corp. bore primary funding responsibility (a closed group of retired and terminated vested plan participants not related to our regulated utility business) at December 31, 2012.  As we received a corresponding amount of assets with the assumed liabilities, execution of the agreement did not have a material impact on our reported results of operations or financial condition.  In the fourth quarter of 2012, EFH Corp. made cash contributions totaling $259 million to settle the terminating plan obligations and fully fund its obligations under the Oncor Retirement Plan.
	We also have supplemental pension plans for certain employees whose retirement benefits cannot be fully earned under the qualified retirement plan, the information for which is included below.
	OPEB Plan
	We participate 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 (OPEB Plan).  For employees retiring on or after January 1, 2002, the retiree contributions required for such coverage vary based on a formula depending on the retiree’s age and years of service.
	Pension and OPEB Costs Recognized as Expense
	The pension and OPEB amounts provided herein include our allocated amounts related to EFH Corp.’s plans based on actuarial computations and reflect our employee and retiree demographics as described above.  We recognized the following net pension and OPEB costs as expense:
		Year Ended December 31,
		2013			2012			2011
	Pension costs	$	95		$	179		$	95
	OPEB costs		37			27			74
	Total benefit costs		132			206			169
	Less amounts deferred principally as property or a regulatory asset		-95			-169			-132
	Net amounts recognized as expense	$	37		$	37		$	37
	We and EFH Corp. use the calculated value method to determine the market-related value of the assets held in the trust for purposes of calculating our pension costs.  We and EFH Corp. include the realized and unrealized gains or losses in the market-related value of assets over a rolling four-year period.  Each year, 25% of such gains and losses for the current year and for each of the preceding three years is included in the market-related value.  Each year, the market-related value of assets is increased for contributions to the plan and investment income and is decreased for benefit payments and expenses for that year.
	We and EFH Corp. use the fair value method to determine the market-related value of the assets held in the trust for purposes of calculating OPEB cost.
	Detailed Information Regarding Pension and OPEB Benefits
	The following pension and OPEB information is based on December 31, 2013, 2012 and 2011 measurement dates:
		Pension Plans									OPEB Plan
		Year Ended December 31,									Year Ended December 31,
		2013			2012			2011			2013			2012			2011
	Assumptions Used to Determine Net Periodic Pension and Benefit Cost:
	Discount rate (a)	4.10%			5.00%			5.50%			4.10%			4.95%			5.55%
	Expected return on plan assets	6.14%			7.40%			7.70%			6.70%			6.80%			7.10%
	Rate of compensation increase	3.94%			3.81%			3.74%			-			-				-
	Components of Net Pension and Benefit Cost:
	Service cost	$	26		$	23		$	20		$	6		$	5		$	7
	Interest Cost		122			106			110			36			39			54
	Expected return on assets		-123			-109			-99			-11			-12			-14
	Amortization of net transition obligation		-			-			-			-			1			1
	Amortization of prior service cost (credit)		-			-			1			-20			-20			-1
	Amortization of net loss		69			78			63			26			14			27
	Settlement charges		1			81			-			-			-			-
	Net periodic pension and benefit cost	$	95		$	179		$	95		$	37		$	27		$	74
	Other Changes in Plan Assets and Benefit Obligations Recognized as Regulatory Assets or in Other Comprehensive Income:
	Net loss (gain)	$	-139		$	110		$	106		$	-		$	83		$	-91
	Prior service cost (credit)		-			-			-			-			-			-127
	Amortization of net loss		-69			-78			-63			-26			-14			-27
	Amortization of transition obligation (asset)		-			-			-			-			-1			-1
	Amortization of prior service (cost) credit		-			-			-1			20			20			1
	Settlement charges		-1			-81			-			-			-			-
	Curtailment		-			-5			-			-			-			-
	Total recognized as regulatory assets or other comprehensive income		-209			-54			42			-6			88			-245
	Total recognized in net periodic pension and benefit costs and as regulatory assets or other comprehensive income	$	-114		$	125		$	137		$	31		$	115		$	-171
	_____________
	(a)As a result of the 2012 amendments discussed above, the discount rate reflected in net pension costs for January through July 2012 was 5.00%, for August through September 2012 was 4.15% and for October through December 2012 was 4.20%.
		Pension Plans									OPEB Plan
		Year Ended December 31,									Year Ended December 31,
		2013			2012			2011			2013			2012			2011
	Assumptions Used to Determine Benefit Obligations at Period End:
	Discount rate	4.74%			4.10%			5.00%			4.98%			4.10%			4.95%
Rate of compensation increase	3.94%			3.94%			3.81%			-			-			-
	Pension Plans						OPEB Plan
	Year Ended December 31,						Year Ended December 31,
	2013			2012			2013			2012
Change in Projected Benefit Obligation:
Projected benefit obligation at beginning of year	$	3,038		$	2,215		$	913		$	809
Service cost		26			23			6			5
Interest cost		122			106			36			39
Participant contributions		-			-			14			15
Medicare Part D reimbursement		-			-			2			3
Settlement		-3			-268			-			-
Curtailment		-			-5			-			-
Assumption of liabilities		-			860			-			6
Actuarial (gain) loss		-183			198			10			94
Benefits paid		-143			-91			-57			-58
Projected benefit obligation at end of year	$	2,857		$	3,038		$	924		$	913
Accumulated benefit obligation at end of year	$	2,752		$	2,908		$	-		$	-
Change in Plan Assets:
Fair value of assets at beginning of year	$	2,327		$	1,542		$	190		$	197
Actual return (loss) on assets		80			199			21			25
Employer contributions		9			93			11			11
Settlement		-2			-268			-			-
Assets related to assumed liabilities		-			852			-			-
Participant contributions		-			-			14			15
Benefits paid		-143			-91			-57			-58
Fair value of assets at end of year	$	2,271		$	2,327		$	179		$	190
Funded Status:
Projected benefit obligation at end of year	$	-2,857		$	-3,038		$	-924		$	-913
Fair value of assets at end of year		2,271			2,327			179			190
Funded status at end of year	$	-586		$	-711		$	-745		$	-723
	Pension Plans						OPEB Plan
	Year Ended December 31,						Year Ended December 31,
	2013			2012			2013			2012
Amounts Recognized in the Balance Sheet Consist of:
Liabilities:
Other current liabilities	$	-3		$	-3		$	-		$	-
Other noncurrent liabilities		-583			-708			-745			-723
Net liability recognized	$	-586		$	-711		$	-745		$	-723
Regulatory assets:
Net loss	$	362		$	602		$	220		$	247
Prior service cost (credit)		-			-			-91			-111
Net regulatory asset recognized	$	362		$	602		$	129		$	136
Accumulated other comprehensive net loss	$	33		$	3		$	1		$	1
The following tables provide information regarding the assumed health care cost trend rates.
	Year Ended December 31,
	2013			2012
Assumed Health Care Cost Trend Rates – Not Medicare Eligible:
Health care cost trend rate assumed for next year	8.00%			8.50%
Rate to which the cost trend is expected to decline (the ultimate trend rate)	5.00%			5.00%
Year that the rate reaches the ultimate trend rate		2022			2022
Assumed Health Care Cost Trend Rates – Medicare Eligible:
Health care cost trend rate assumed for next year	7.00%			7.50%
Rate to which the cost trend is expected to decline (the ultimate trend rate)	5.00%			5.00%
Year that the rate reaches the ultimate trend rate		2021			2021
	1-Percentage Point Increase			1-Percentage Point Decrease
Sensitivity Analysis of Assumed Health Care Cost Trend Rates:
Effect on accumulated postretirement obligation	$	117		$	-97
Effect on postretirement benefits cost		7			-6
The following table provides information regarding pension plans with projected benefit obligations (PBO) and accumulated benefit obligations (ABO) in excess of the fair value of plan assets.
	At December 31,
	2013			2012
Pension Plans with PBO and ABO in Excess of Plan Assets:
Projected benefit obligations	$	2,857		$	3,038
Accumulated benefit obligations		2,752			2,908
Plan assets		2,271			2,327
Pension Plans and OPEB Plan Investment Strategy and Asset Allocations
Our investment objective for the retirement plans is to invest in a suitable mix of assets to meet the future benefit obligations at an acceptable level of risk, while minimizing the volatility of contributions.  Equity securities are held to achieve returns in excess of passive indexes by participating in a wide range of investment opportunities.  International equity securities are used to further diversify the equity portfolio and may include investments in both developed and emerging international markets.  Fixed income securities include primarily corporate bonds from a diversified range of companies, US Treasuries and agency securities and money market instruments.  Our investment strategy for fixed income investments is to maintain a high grade portfolio of securities, which assists us in managing the volatility and magnitude of plan contributions and expense while maintaining sufficient cash and short-term investments to pay near-term benefits and expenses.
The retirement plans’ investments are managed in two pools: one associated with the recoverable service portion of plan obligations related to our regulated utility business, and the other associated with plan obligations for the closed group of retired and terminated plan participants not related to our regulated utility business that we assumed from EFH Corp. in connection with our sponsorship of the Oncor Plan¸ as discussed above. The recoverable service portion is invested in a broadly diversified portfolio of equity and fixed income securities. The nonrecoverable service portion is invested in fixed income securities intended to fully hedge the obligations, within practical limitations.
The target asset allocation ranges of pension plan investments by asset category are as follows:
		Target Allocation Ranges
Asset Category		Recoverable		Nonrecoverable
US equities		24% - 30%		—
International equities		19% - 25%		—
Fixed income		45% - 57%		100%
Our investment objective for the OPEB Plan primarily follows the objectives of the pension plans discussed above, while maintaining sufficient cash and short-term investments to pay near-term benefits and expenses.  The actual amounts at December 31, 2013 provided below are consistent with the asset allocation targets.
Fair Value Measurement of Pension Plan Assets
At December 31, 2013 and 2012, pension plan assets measured at fair value on a recurring basis consisted of the following:
		At December 31, 2013															At December 31, 2012
		Level 1				Level 2				Level 3			Total				Level 1			Level 2				Level 3		Total
Asset Category
Interest-bearing cash		$	-			$	160			$	-		$	160			$	-		$	134			$	-	$	134
Equity securities:
US			250				82				-			332				206			95				-		301
International			337				7				-			344				280			7				-		287
Fixed income securities:
Corporate bonds (a)			-				1,265				-			1,265				-			1,319				-		1,319
US Treasuries			-				108				-			108				-			206				-		206
Other (b)			-				55				-			55				-			73				-		73
Preferred securities			-				-				7			7				-			-				7		7
Total assets		$	587			$	1,677			$	7		$	2,271			$	486		$	1,834			$	7	$	2,327
_____________
(a)Substantially all corporate bonds are rated investment grade by a major ratings agency such as Moody’s.
(b)Other consists primarily of municipal bonds and fixed income derivative instruments.
There was no significant change in the fair value of Level 3 assets in the periods presented.
Fair Value Measurement of OPEB Plan Assets
At December 31, 2013 and 2012, OPEB Plan assets measured at fair value on a recurring basis consisted of the following:
		At December 31, 2013												At December 31, 2012
		Level 1			Level 2			Level 3			Total			Level 1			Level 2		Level 3			Total
Asset Category
Interest-bearing cash		$	-		$	6		$	-		$	6		$	-		$	10	$	-		$	10
Equity securities:
US			53			5			-			58			49			6		-			55
International			35			-			-			35			31			-		-			31
Fixed income securities:
Corporate bonds (a)			-			34			-			34			-			42		-			42
US Treasuries			-			1			-			1			-			4		-			4
Other (b)			43			2			-			45			45			3		-			48
Preferred securities			-			-			-			-			-			-		-			-
Total assets		$	131		$	48		$	-		$	179		$	125		$	65	$	-		$	190
_____________
(a)Substantially all corporate bonds are rated investment grade by a major ratings agency such as Moody’s.
(b)Other consists primarily of diversified bond mutual funds.
Expected Long-Term Rate of Return on Assets Assumption
The retirement plans’ strategic asset allocation is determined in conjunction with the plans’ advisors and utilizes a comprehensive Asset-Liability modeling approach to evaluate potential long-term outcomes of various investment strategies.  The modeling incorporates long-term rate of return assumptions for each asset class based on historical and future expected asset class returns, current market conditions, rate of inflation, current prospects for economic growth, and taking into account the diversification benefits of investing in multiple asset classes and potential benefits of employing active investment management.
Pension Plans				OPEB Plan
Asset Class		Expected Long-Term Rate of Return		Asset Class		Expected Long-Term Rate of Return
International equity securities		7.83%		401(h) accounts		7.59%
US equity securities		7.20%		Life insurance VEBA		6.71%
Real estate		6.20%		Union VEBA		6.71%
Credit strategies		5.87%		Non-union VEBA		3.80%
Fixed income securities		5.30%		Weighted average		7.05%
Weighted average (a)		7.39%
_____________
(a)The 2014 expected long-term rate of return for the nonregulated portion of the Oncor Retirement Plan is 4.72%.
Significant Concentrations of Risk
The plans’ investments are exposed to risks such as interest rate, capital market and credit risks.  We seek to optimize return on investment consistent with levels of liquidity and investment risk which are prudent and reasonable, given prevailing capital market conditions and other factors specific to participating employers.  While we recognize the importance of return, investments will be diversified in order to minimize the risk of large losses unless, under the circumstances, it is clearly prudent not to do so.  There are also various restrictions and guidelines in place including limitations on types of investments allowed and portfolio weightings for certain investment securities to assist in the mitigation of the risk of large losses.
Assumed Discount Rate
For the Oncor retirement plans at December 31, 2013, we selected the assumed discount rate using the Aon Hewitt AA-AAA Bond Universe yield curve, which is based on corporate bond yields and at December 31, 2013 consisted of 1,095 corporate bonds with an average rating of AA and AAA using Moody’s, S&P and Fitch ratings.  For the EFH Retirement Plan, the OPEB Plan and, for dates earlier than December 31, 2013, the Oncor Retirement Plan, we and EFH Corp. selected the assumed discount rate using the Aon Hewitt AA Above Median yield curve, which is based on corporate bond yields and at December 31, 2013 consisted of 389 corporate bonds with an average rating of AA using Moody’s, S&P and Fitch ratings.
Amortization in 2014
In 2014, amortization of the net actuarial loss and prior service cost for the defined benefit pension plans from regulatory assets into net periodic benefit cost is expected to be $39 million and less than $1 million, respectively.  Amortization of the net actuarial loss and prior service credit for the OPEB Plan from regulatory assets into net periodic benefit cost is expected to be $26 million and a $20 million credit, respectively.
Pension and OPEB Plan Cash Contributions
Our contributions to the benefit plans were as follows:
	Year Ended December 31,
	2013			2012			2011
Pension plans contributions	$	9		$	93		$	175
OPEB Plan contributions		11			11			18
Total contributions	$	20		$	104		$	193
Our funding for the pension plans and the OPEB Plan is expected to total $87 million and $15 million, respectively in 2014 and approximately $408 million and $139 million, respectively, for the 2014 to 2018 period.
Future Benefit Payments
Estimated future benefit payments to beneficiaries are as follows:
	2014			2015			2016			2017			2018			2019-23
Pension plans	$	155		$	159		$	165		$	169		$	175		$	942
OPEB Plan	$	45		$	49		$	52		$	55		$	57		$	316
Thrift Plan
Our employees may participate in a qualified savings plan, the EFH Corp. Thrift Plan (Thrift Plan).  This plan is a participant-directed defined contribution plan intended to qualify under Section 401(a) of the Code, and is subject to the provisions of ERISA.  Under the terms of the Thrift Plan, employees who do not earn more than the IRS threshold compensation limit used to determine highly compensated employees may contribute, through pre-tax salary deferrals and/or after-tax applicable payroll deductions, the lesser of 75% of their regular salary or wages or the maximum amount permitted under law.  Employees who earn more than such threshold may contribute from 1% to 20% of their regular salary or wages.  Employer matching contributions are also made in an amount equal to 100% of the first 6% of employee contributions for employees who are covered under the Cash Balance Formula of the Oncor Retirement Plan, and 75% of the first 6% of employee contributions for employees who are covered under the Traditional Retirement Plan Formula of the Oncor Retirement Plan.  Employer matching contributions are made in cash and may be allocated by participants to any of the plan's investment options.  Our contributions to the Thrift Plan totaled $13 million, $12 million and $12 million for the years ended December 31, 2013, 2012 and 2011, respectively.

StockBased_Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2013
Stock-Based Compensation [Abstract]	'
STOCK-BASED COMPENSATION	'
	10.     STOCK-BASED COMPENSATION
	We currently do not offer stock-based compensation to our employees or directors.  In 2008, we established the SARs Plan under which certain of our executive officers and key employees were granted stock appreciation rights payable in cash, or in some circumstances, Oncor membership interests.  In February 2009, we established the Oncor Electric Delivery Company LLC Director Stock Appreciation Rights Plan (the Director SARs Plan) under which certain non-employee members of our board of directors and other persons having a relationship with us were granted SARs payable in cash, or in some circumstances, Oncor membership interests.
	In November 2012, we accepted the early exercise of all outstanding SARs (both vested and unvested, totaling 14,322,219 SARs under the SARs Plan and 55,000 SARs under the Director SARs Plan) issued to date pursuant to both SARs Plans.  The early exercise was permitted by our board of directors pursuant to the provision of the SARs Plan that permits the board to accelerate the vesting and exercisability of SARs.  The early exercise of SARs entitled each participant in the SARs Plan to: (1) an exercise payment (Exercise Payment) equal to the number of SARs exercised multiplied by the difference between $14.54 and the base price of the SARs (as stated in the award letter for each SARs grant); and (2) the accrual of interest on all dividends declared to date with respect to the SARs, but no further dividend accruals.  Additionally, certain executive officers agreed to defer payment of a portion of his/her Exercise Payment until the earlier of November 7, 2016 or the occurrence of an event triggering SAR exercisability pursuant to Section 5(c)(ii) of the SARs Plan.  These deferred payments totaled approximately $6 million in the aggregate.  As a result of the early exercise, in 2012 we paid an aggregate of approximately $64 million related to Exercise Payments ($57 million charged to expense), and began accruing interest on approximately $18 million in aggregate dividends.
	As described above, as part of the 2012 early exercise of SARs we began accruing interest on dividends declared with respect to the SARs.  Under both SARs plans, dividends that are paid in respect of Oncor membership interests while the SARs were outstanding were credited to the SARs holder’s account as if the SARs were units, payable upon the earliest to occur of death, disability, separation from service, unforeseeable emergency, a change in control, or the exercise of the SARs.  As a result, in 2012 we recorded compensation expense of approximately $6 million relating to dividend accruals through November 2012.  For accounting purposes, the liability is discounted based on an employee’s or director’s expected retirement date.   We recognized approximately $2 million and $1  million in accretion and interest with respect to such dividends in 2013 and 2012, respectively.

RelatedParty_Transactions

Related-Party Transactions	12 Months Ended
	Dec. 31, 2013
Related-Party Transactions [Abstract]	'
RELATED-PARTY TRANSACTIONS	'
	11.   RELATED-PARTY TRANSACTIONS
	The following represent our significant related-party transactions and related matters:
		·		We record revenue from TCEH, principally for electricity delivery fees, which totaled $967 million, $962 million and $1,026 million for the years ended December 31, 2013, 2012 and 2011, respectively.  The fees are based on rates regulated by the PUCT that apply to all REPs.  The balance sheets at December 31, 2013 and 2012 reflect accounts receivable from affiliates totaling $135 million ($56 million of which was unbilled) and $53 million ($48 million of which was unbilled), respectively, primarily consisting of trade receivables from TCEH related to these electricity delivery fees.  At February 27, 2014, we had collected all but $6 million of the accounts receivable from affiliates outstanding at December 31, 2013.  Trade accounts receivable from TCEH at December 31, 2012 reflects timing of payments in 2012.
		·		Prior to August 2012, we recognized interest income from TCEH under an agreement related to our generation-related regulatory assets, which have been securitized through the issuance of transition bonds by Bondco.  This interest income, which served to offset our interest expense on the transition bonds, totaled $16 million and $32 million for the years ended December 31, 2012 and 2011, respectively.  Also prior to August 2012, we received reimbursement under a note receivable from TCEH for incremental amounts payable related to income taxes as a result of delivery fee surcharges related to the transition bonds.  Amounts received under the note receivable for the year ended December 31, 2012 totaled $20 million.
	In August 2012, we sold to EFIH all future interest reimbursements and the remaining $159 million obligation under the note with TCEH.  As a result, EFIH paid, and we received, an aggregate $159 million for the agreements.  The sale of the related-party agreements was reported as a $2 million (after tax) decrease in total membership interests in 2012 in accordance with accounting rules for related-party transactions.
		·		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 $30 million, $32 million and $34 million for the years ended December 31, 2013, 2012 and 2011, respectively.  We also charge each other for shared facilities at cost.  Our payments to EFH Corp. subsidiaries for shared facilities totaled $4 million, $5 million and $4 million for the years ended December 31, 2013, 2012 and 2011, respectively.  Payments we received from EFH Corp. subsidiaries related to shared facilities, totaled $2 million for each of the years ended December 31, 2013 and 2012 and $1 million for the year ended December 31, 2011.
		·		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 $16 million for each of the years ended December 31, 2013 and 2012 and $17 million for the year ended December 31, 2011.  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.
		·		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 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 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 agreement and reported on our balance sheet consisted of the following:
		At December 31, 2013							At December 31, 2012
		EFH Corp.			Texas Transmission		Total		EFH Corp.		Texas Transmission		Total
	Federal income taxes	$	-18		$	-5	$	-23	$	-	$	-	$	-
	Texas margin taxes		23			-		23		22		-		22
	Total payable (receivable)	$	5		$	-5	$	-	$	22	$	-	$	22
	Cash payments made to (received from) members related to income taxes consisted of the following:
		Year Ended December 31, 2013							Year Ended December 31, 2012
		EFH Corp.			Texas Transmission		Total		EFH Corp.		Texas Transmission		Total
	Federal income taxes (a)	$	78		$	11	$	89	$	-18	$	-5	$	-23
	Texas margin taxes (b)		12			-		12		21		-		21
	Total payments (receipts)	$	90		$	11	$	101	$	3	$	-5	$	-2
	______________
		(a)		Includes $33 million payment made to EFH Corp. in 2013 related to the 1997-2002 IRS appeals settlement.
		(b)		Includes $10 million refund received from EFH Corp. in 2013 related to 1997-2001 amended Texas franchise tax returns.
		·		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 December 31, 2013 and 2012, TCEH had posted letters of credit in the amount of $9 million and $11 million, respectively, for our benefit.
		·		In connection with assuming sponsorship of the Oncor Retirement Plan in 2012, we entered into an agreement with EFH Corp. to assume primary responsibility for retirement benefits of a closed group of retired and terminated vested retirement plan participants not related to our regulated utility business.  As the Oncor Retirement Plan received an amount of plan assets equal to the liabilities we assumed for those participants, execution of the agreement did not have a material impact on our reported results of operations or financial condition.  See Note 9 for further information regarding funding for the pension plans.
		·		As discussed in Note 1, EFH Corp. and other members of the Texas Holdings Group have engaged in discussions with certain unaffiliated creditors regarding possible restructuring transactions involving those entities.  The US Bankruptcy Code permits a debtor in bankruptcy to assume or reject executory contracts and unexpired leases.  If members of the Texas Holdings Group were to become debtors in a bankruptcy case and determined to reject some or all of their executory contracts and unexpired leases with us,  our results of operations and financial condition could be adversely affected.  At December 31, 2013, our exposure to the Texas Holdings Group with respect to executory contracts and unexpired leases totaled approximately $20 million.
		·		Affiliates of the Sponsor Group have, and from time-to-time may in the future (1) sell, acquire or participate in the offerings of our debt or debt securities in open market transactions or through loan syndications, and (2) perform 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.
	See Notes 3, 8 and 9 for information regarding the tax sharing agreement, distributions to members and our participation in EFH Corp. pension and OPEB plans, respectively.

Supplementary_Financial_Inform

Supplementary Financial Information	12 Months Ended
	Dec. 31, 2013
Supplementary Financial Information [Abstract]	'
SUPPLEMENTARY FINANCIAL INFORMATION	'
	12.   SUPPLEMENTARY FINANCIAL INFORMATION
	Variable Interest Entities
	We are the primary beneficiary and consolidate a wholly-owned VIE, Bondco, which was organized for the limited purpose of issuing specific transition bonds and purchasing and owning transition property acquired from us that is pledged as collateral to secure the bonds.  We act as the servicer for this entity to collect transition charges authorized by the PUCT.  These funds are remitted to the trustee and used for interest and principal payments on the transition bonds and related costs.
	The material assets and liabilities of Bondco are presented separately on the face of our Consolidated Balance Sheet because the assets are restricted and can only be used to settle the obligations of Bondco, and Bondco’s creditors do not have recourse to our general credit or assets.
	Our maximum exposure does not exceed our equity investment in Bondco, which was $16 million at both December 31, 2013 and 2012.  We did not provide any financial support to Bondco during the years ended December 31, 2013 and 2012.
	Major Customers
	Revenues from TCEH represented 27%, 29% and 33% of our total operating revenues for the years ended December 31, 2013, 2012 and 2011, respectively.  Revenues from REP subsidiaries of a nonaffiliated entity,  collectively represented 15% of total operating revenues for each of the years ended December 31, 2013, 2012 and 2011.  No other customer represented 10% or more of our total operating revenues.
	Other Income and Deductions
		Year Ended December 31,
		2013			2012			2011
	Other income:
	Accretion of fair value adjustment (discount) to regulatory assets due to purchase accounting	$	17		$	23		$	29
	Net gain on sale of other properties and investments		1			3			1
	Total other income	$	18		$	26		$	30
	Other deductions:
	Professional fees	$	3		$	3		$	4
	SARs exercise (Note 10)		2			57			-
	Other		10			4			5
	Total other deductions	$	15		$	64		$	9
	Interest Expense and Related Charges
		Year Ended December 31,
		2013			2012			2011
	Interest expense	$	360		$	366		$	359
	Amortization of debt issuance costs and discounts		21			18			3
	Allowance for funds used during construction – capitalized interest portion		-10			-10			-3
	Total interest expense and related charges	$	371		$	374		$	359
	Restricted Cash
	Restricted cash amounts reported on our balance sheet consisted of the following:
		At December 31, 2013						At December 31, 2012
		Current Assets			Noncurrent Assets			Current Assets			Noncurrent Assets
	Customer collections related to transition bonds used only to service debt and pay expenses	$	52		$	-		$	55		$	-
	Reserve for fees associated with transition bonds		-			10			-			10
	Reserve for shortfalls of transition bond charges		-			6			-			6
	Total restricted cash	$	52		$	16		$	55		$	16
	Trade Accounts Receivable
	Trade accounts receivable reported on our balance sheet consisted of the following:
		At December 31,
		2013			2012
	Gross trade accounts receivable	$	527		$	395
	Trade accounts receivable from TCEH		-139			-55
	Allowance for uncollectible accounts		-3			-2
	Trade accounts receivable from nonaffiliates – net	$	385		$	338
	Gross trade accounts receivable at December 31, 2013 and 2012 included unbilled revenues of $180 million and $147 million, respectively.  At both December 31, 2013 and 2012, REP subsidiaries of a nonaffiliated entity collectively represented approximately 12% of the nonaffiliated trade accounts receivable amount.  Trade accounts receivable from TCEH at December 31, 2012 reflects timing of payments in 2012.
	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 December 31,
		2013			2012
	Assets related to employee benefit plans, including employee savings programs	$	88		$	80
	Land		3			3
	Total investments and other property	$	91		$	83
	The majority of these assets represent cash surrender values of life insurance policies that are purchased to fund liabilities under deferred compensation plans.  At December 31, 2013 and 2012, the face amount of these policies totaled $159 million and $152 million, respectively, and the net cash surrender values (determined using a Level 2 valuation technique) totaled $71 million and $65 million, respectively.  Changes in cash surrender value are netted against premiums paid.  Other investment assets held to satisfy deferred compensation liabilities are recorded at market value.
	Property, Plant and Equipment
	Property, plant and equipment reported on our balance sheet consisted of the following:
			Composite Depreciation Rate/		At December 31,
			Avg. Life at December 31, 2013		2013			2012
	Assets in service:
	Distribution		4.1% / 24.6 years		$	10,055		$	9,745
	Transmission		2.8% / 35.8 years			6,133			5,482
	Other assets		9.1% / 11.0 years			868			856
	Total					17,056			16,083
	Less accumulated depreciation					5,725			5,407
	Net of accumulated depreciation					11,331			10,676
Construction work in progress					556			627
Held for future use					15			15
Property, plant and equipment – net				$	11,902		$	11,318
Depreciation expense as a percent of average depreciable property approximated 3.7%,  3.9% and 4.0% for the years ended December 31, 2013, 2012 and 2011, respectively.
Intangible Assets
Intangible assets (other than goodwill) reported on our balance sheet consisted of the following:
	At December 31, 2013									At December 31, 2012
	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	$	440		$	82		$	358		$	295		$	79	$	216
Capitalized software		385			189			196			409			220		189
Total	$	825		$	271		$	554		$	704		$	299	$	405
Aggregate amortization expense for intangible assets totaled $53 million, for each of the years ended December 31, 2013 and 2012 and $48 million for the year ended December 31, 2011.  At December 31, 2013, the weighted average remaining useful lives of capitalized land easements and software were 85 years and 4 years, respectively.  The estimated aggregate amortization expense for each of the next five fiscal years is as follows:
Year		Amortization Expense
2014		$	55
2015			55
2016			52
2017			44
2018			40
At both December 31, 2013 and 2012, goodwill totaling $4.1 billion was reported on our balance sheet.  None of this goodwill is being deducted for tax purposes.  See Note 1 regarding goodwill impairment assessment and testing.
Other Noncurrent Liabilities and Deferred Credits
Other noncurrent liabilities and deferred credits reported on our balance sheet consisted of the following:
	At December 31,
	2013			2012
Retirement plans and other employee benefits	$	1,399		$	1,495
Uncertain tax positions (including accrued interest)		56			169
Amount payable related to income taxes		17			-
Investment tax credits		20			24
Other		62			58
Total other noncurrent liabilities and deferred credits	$	1,554		$	1,746
Supplemental Cash Flow Information
	Year Ended December 31,
	2013			2012			2011
Cash payments (receipts) related to:
Interest	$	361		$	378		$	360
Capitalized interest		-10			-10			-3
Interest (net of amounts capitalized)		351			368			357
Amount in lieu of income taxes:
Federal		89			-23			-134
State		12			21			20
Total amount in lieu of income taxes		101			-2			-114
SARs exercise		4			64			-
Noncash construction expenditures (a)		84			103			140
______________
(a)Represents end-of-period accruals.
Quarterly Information (unaudited)
Results of operations by quarter for the years ended December 31, 2013 and 2012 are summarized below.  In our opinion, all adjustments (consisting of normal recurring accruals) necessary for a fair statement of such amounts have been made.  Quarterly results are not necessarily indicative of a full year’s operations because of seasonal and other factors.
2013		First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Operating revenues		$	817		$	857		$	966		$	912
Operating income			180			189			239			190
Net income			87			96			146			103
2012		First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Operating revenues		$	783		$	828		$	925		$	792
Operating income			157			188			230			156
Net income (a)			75			107			139			28
______________
(a)Fourth quarter 2012 reflects a $57 million pre-tax charge to expense associated with the SARs settlement (see Note 10).

Description_Of_Business_and_Si1

Description Of Business and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Description Of 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 27%, 29% and 33% of our total operating revenues for the years ended December 31, 2013, 2012 and 2011, 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 VIE (see Note 12).  This financing subsidiary was organized for the limited purpose of issuing certain transition bonds to recover generation-related regulatory asset stranded costs and other qualified costs under an order issued by the PUCT in 2002.  Bondco issued an aggregate $1.3 billion principal amount of transition bonds during 2003 and 2004.
	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 the event of 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.
	As noted in SEC filings made by members of the Texas Holdings Group, EFH Corp. and other members of the Texas Holdings Group have engaged in discussions with certain unaffiliated creditors regarding certain of those entities’ capital structures and long-term liquidity, as well as possible restructuring transactions involving those entities.  We believe the “ring-fencing” measures discussed above mitigate our exposure to a bankruptcy or other restructuring transaction involving members of the Texas Holdings Group.
Basis Of Presentation	'
	Basis of Presentation
	Our consolidated financial statements have been prepared in accordance with US GAAP and on the same basis as the audited financial statements in our Annual Report on Form 10-K for the year ended December 31, 2012.  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.  All dollar amounts in the financial statements and tables in the notes are stated in millions of US dollars unless otherwise indicated.
Consolidation Of Variable Interest Entities	'
	Consolidation of Variable Interest Entities
	A VIE is an entity with which we have a relationship or arrangement that indicates some level of control over the entity or results in economic risks to us.  We consolidate a VIE if we have: a) the power to direct the significant activities of the VIE and b) the right or obligation to absorb profit and loss from the VIE (primary beneficiary).  See Note 12.
Income Taxes	'
	Income Taxes
	EFH Corp. files a consolidated federal income tax return.  Effective with the November 2008 sale of equity interests to Texas Transmission and Investment LLC, we became a partnership for US federal income tax purposes, and subsequently we are not a member of EFH Corp.’s consolidated tax group and only EFH Corp.’s share of our partnership income is included in its consolidated federal income tax return.  Our tax sharing agreement with Oncor Holdings and EFH Corp. was amended in November 2008 to include Texas Transmission and Investment LLC.  The tax sharing agreement provides for the calculation of tax liability substantially as if we and Oncor Holdings were taxed as corporations, and requires tax payments to members determined on that basis (without duplication for any income taxes paid by a subsidiary of Oncor Holdings).  Accordingly, while partnerships are not subject to income taxes, in consideration of the tax sharing agreement and the presentation of our financial statements as an entity subject to cost-based regulatory rate-setting processes, with such costs including income taxes, the financial statements present amounts determined under the tax sharing agreement as “provision in lieu of income taxes” and “liability in lieu of deferred income taxes” for periods subsequent to the sales of equity interests discussed in Note 3.
	Such amounts are determined in accordance with the provisions of accounting guidance for income taxes and for uncertainty in income taxes and thus differences between the book and tax bases of assets and liabilities are accounted for as if we were taxed as a corporation.  The accounting guidance for rate-regulated enterprises requires the recognition of regulatory assets or liabilities if it is probable such deferred tax amounts will be recovered from, or returned to customers in future rates.  Investment tax credits are amortized to income over the estimated lives of the related properties.
	We classify interest and penalties expense related to uncertain tax positions as current provision in lieu of income taxes as discussed in Note 3.
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.  No material adjustments were made to previous estimates or assumptions during the current year.
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.
Revenue Recognition	'
	Revenue Recognition
	Revenue includes an estimate for electricity delivery services provided from the billed meter reading date to the end of the period (unbilled revenue).  For electricity delivery services billed on the basis of kWh volumes, unbilled revenue is based on data collected through our AMS.    For other electricity delivery services, unbilled revenue is based on average daily revenues for the most recent period applied to the number of unmetered days through the end of the period.
Impairment Of Long-Lived Assets And Goodwill	'
	Impairment of Long-Lived Assets and Goodwill
	We evaluate long-lived assets (including intangible assets with finite lives) for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable.
	We also evaluate goodwill for impairment annually (at December 1) or whenever events or changes in circumstances indicate that an impairment may exist.
	Goodwill impairment tests performed in 2013 and 2012 were based on determinations of enterprise value using discounted cash flow analyses, comparable company equity values and any relevant transactions indicative of enterprise values (quantitative assessment).  The test performed in 2011 was based on a qualitative assessment in which we considered macroeconomic conditions, industry and market considerations, cost factors, overall financial performance and other relevant events.  No impairments were recognized in 2013, 2012 or 2011.
System Of Accounts	'
	System of Accounts
	Our accounting records have been maintained in accordance with the FERC Uniform System of Accounts as adopted by the PUCT.
Defined Benefit Pension Plans And Other Postretirement Employee Benefit (OPEB) Plans	'
	Defined Benefit Pension Plans and Other Postretirement Employee Benefit (OPEB) Plans
	We have liabilities under pension plans that offer benefits based on either a traditional defined benefit formula or a cash balance formula and the OPEB Plan that offers certain health care and life insurance benefits to eligible employees and their eligible dependents upon the retirement of such employees from the company.  Costs of pension and OPEB plans are dependent upon numerous factors, assumptions and estimates.  In 2012, EFH Corp. made various changes to the EFH Retirement Plan, including splitting off into a new plan all of the assets and liabilities associated with Oncor employees and all retirees and terminated vested participants of EFH Corp. and its subsidiaries (including discontinued businesses).  See Note 9 for additional information regarding the pension plans and the OPEB Plan.
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.
Fair Value Of Nonderivative Financial Instruments	'
	Fair Value of Nonderivative Financial Instruments
	The carrying amounts for financial assets classified as current assets and the carrying amounts for financial liabilities classified as current liabilities approximate fair value due to the short maturity of such instruments.  The fair values of other financial instruments, for which carrying amounts and fair values have not been presented, are not materially different than their related carrying amounts.  The following discussion of fair value accounting standards applies primarily to our determination of the fair value of assets in the pension and OPEB plan trusts (see Note 9) and long-term debt (see Note 6).
	Accounting standards related to the determination of fair value define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.  We use a “mid-market” valuation convention (the mid-point price between bid and ask prices) as a practical expedient to measure fair value for the majority of our assets and liabilities subject to fair value measurement on a recurring basis.  We primarily use the market approach for recurring fair value measurements and use valuation techniques to maximize the use of observable inputs and minimize the use of unobservable inputs.
	We categorize our assets and liabilities recorded at fair value based upon the following fair value hierarchy:
		·	Level 1 valuations use quoted prices in active markets for identical assets or liabilities that are accessible at the measurement date.  An active market is a market in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis.
		·	Level 2 valuations use inputs that, in the absence of actively quoted market prices, are observable for the asset or liability, either directly or indirectly.  Level 2 inputs include: (a) quoted prices for similar assets or liabilities in active markets, (b) quoted prices for identical or similar assets or liabilities in markets that are not active, (c) inputs other than quoted prices that are observable for the asset or liability such as interest rates and yield curves observable at commonly quoted intervals and (d) inputs that are derived principally from or corroborated by observable market data by correlation or other means.  Our Level 2 valuations utilize over-the-counter broker quotes, quoted prices for similar assets or liabilities that are corroborated by correlations or other mathematical means and other valuation inputs.
		·	Level 3 valuations use unobservable inputs for the asset or liability.  Unobservable inputs are used to the extent observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date.  We use the most meaningful information available from the market combined with internally developed valuation methodologies to develop our best estimate of fair value.
	We utilize several different valuation techniques to measure the fair value of assets and liabilities, relying primarily on the market approach of using prices and other market information for identical and/or comparable assets and liabilities for those items that are measured on a recurring basis.
Franchise Taxes	'
	Franchise Taxes
	Franchise taxes are assessed to us by local governmental bodies, based on kWh delivered and are the principal component of taxes other than amounts related to income taxes as reported in the income statement.  Franchise taxes are not a “pass through” item.  The rates we charge customers are intended to recover the franchise taxes, but we are not acting as an agent to collect the taxes from customers.
Cash And Cash Equivalents	'
	Cash and Cash Equivalents
	For purposes of reporting cash and cash equivalents, temporary cash investments purchased with a remaining maturity of three months or less are considered to be cash equivalents.  See Note 12 for details regarding restricted cash.
Property, Plant And Equipment	'
	Property, Plant and Equipment
	Properties are stated at original cost. The cost of self-constructed property additions includes materials and both direct and indirect labor and applicable overhead and an allowance for funds used during construction.
	Depreciation of property, plant and equipment is calculated on a straight-line basis over the estimated service lives of the properties based on depreciation rates approved by the PUCT.  As is common in the industry, depreciation expense is recorded using composite depreciation rates that reflect blended estimates of the lives of major asset groups as compared to depreciation expense calculated on a component asset-by-asset basis.  Depreciation rates include plant removal costs as a component of depreciation expense, consistent with regulatory treatment.  Actual removal costs incurred are charged to accumulated depreciation.  When accrued removal costs exceed incurred removal costs, the difference is reclassified as a regulatory obligation to retire assets in the future.
Allowance For Funds Used During Construction (AFUDC)	'
	Allowance for Funds Used During Construction (AFUDC)
	AFUDC is a regulatory cost accounting procedure whereby both interest charges on borrowed funds and a return on equity capital used to finance construction are included in the recorded cost of utility plant and equipment being constructed.  AFUDC is capitalized on all projects involving construction periods lasting greater than thirty days.  The equity portion of capitalized AFUDC is accounted for as other income.  We recorded $1 million of equity AFUDC in the year ended December 31, 2012 and none in the years ended December 31, 2013 and 2011.  See Note 12 for detail of amounts charged to interest expense.
Regulatory Assets And Liabilities	'
	Regulatory Assets and Liabilities
	Our financial statements reflect regulatory assets and liabilities under cost-based rate regulation in accordance with accounting standards related to the effect of certain types of regulation.  Regulatory decisions can have an impact on the recovery of costs, the rate earned on invested capital and the timing and amount of assets to be recovered by rates.  See Note 4 for details of regulatory assets and liabilities.

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Taxes [Abstract]	'
Components Of Income Tax Provisions (Benefits)	'
		Year Ended December 31,
		2013		2012		2011
	Reported in operating expenses:
	Current:
	US federal	$	51	$	23	$	-55
	State		12		21		21
	Deferred:
	US federal		181		200		248
	State		6		-		-
	Amortization of investment tax credits		-3		-4		-5
	Total reported in operating expenses		247		240		209
	Reported in other income and deductions:
	Current:
	US federal		-5		-14		9
	State		-		-		1
	Deferred federal		7		8		10
	Total reported in other income and deductions		2		-6		20
	Total provision in lieu of income taxes	$	249	$	234	$	229
Schedule Of Income Tax Reconciliation	'
		Year Ended December 31,
		2013		2012		2011
	Income before provision in lieu of income taxes	$	681	$	583	$	596
	Provision in lieu of income taxes at the US federal statutory rate of 35%	$	238	$	204	$	209
	Amortization of investment tax credits – net of deferred tax effect		-3		-4		-5
	Amortization (under regulatory accounting) of statutory tax rate changes		-2		-3		-3
	Amortization of Medicare subsidy regulatory asset		14		14		-
	Texas margin tax, net of federal tax benefit		15		14		14
	Nondeductible losses (gains) on benefit plan investments		-3		-2		-1
	Other, including audit settlements		-10		11		15
	Reported provision in lieu of income taxes	$	249	$	234	$	229
	Effective rate		36.6%		40.1%		38.4%
Schedule Of Changes To Uncertain Tax Positions	'
		2013		2012		2011
	Balance at January 1, excluding interest and penalties	$	144	$	126	$	82
	Additions based on tax positions related to prior years		-		18		44
	Reductions based on tax positions related to prior years (a)		-66		-		-
	Reduction related to 1997-2002 IRS appeals settlement		-24		-		-
	Balance at December 31, excluding interest and penalties	$	54	$	144	$	126
	_________
	(a)Includes IRS audit for the years 2003 through 2006.

Regulatory_Assets_and_Liabilit1

Regulatory Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2013
Regulatory Assets and Liabilities [Abstract]	'
Components Of Regulatory Assets And Liabilities	'
			Remaining Rate Recovery/Amortization Period at		Carrying Amount At
			31-Dec-13		31-Dec-13		31-Dec-12
	Regulatory assets:
	Generation-related regulatory assets securitized		2 years		$	281	$	409
	by transition bonds (a)(e)
	Employee retirement costs		6 years			71		87
	Employee retirement costs to be reviewed (b)(c)		To be determined			224		186
	Employee retirement liability (a)(c)(d)		To be determined			491		738
	Self-insurance reserve (primarily storm recovery		6 years			158		190
	costs) ― net
	Self-insurance reserve to be reviewed (b)(c)		To be determined			196		128
	Securities reacquisition costs (pre-industry restructure)		3 years			32		41
	Securities reacquisition costs		Terms of related debt			5		22
	(post-industry restructure) ― net
	Recoverable amounts in lieu of deferred		Life of related asset or liability			42		71
	income taxes ― net
	Rate review expenses (a)		Largely 2 years			4		6
	Advanced meter customer education costs		6 years			8		10
	Deferred conventional meter and metering		Largely 7 years			146		152
	facilities depreciation
	Deferred AMS costs		6 years			62		2
	Energy efficiency performance bonus (a)		1 year			12		9
	Under-recovered wholesale transmission		1 year			37		40
	service expense ― net (a)
	Energy efficiency programs (a)		Not applicable			-		1
	Other regulatory assets		Various			2		1
	Total regulatory assets					1,771		2,093
	Regulatory liabilities:
	Estimated net removal costs		Life of utility plant			385		244
	Investment tax credit and protected excess		Various			23		28
	deferred taxes
	Over-collection of transition bond revenues (a)(e)		2 years			35		33
	Energy efficiency programs (a)		Not applicable			4		-
	Total regulatory liabilities					447		305
	Net regulatory asset				$	1,324	$	1,788
	____________
		(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.
	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.  Bondco net regulatory assets of $335 million at December 31, 2012 consisted of $368 million included in generation-related regulatory assets net of the regulatory liability for over-collection of transition bond revenues of $33 million.

LongTerm_Debt_Tables

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2013
Borrowings Under Credit Facilities And Long-Term Debt [Abstract]	'
Schedule Of Long-Term Debt	'
		December 31,
		2013		2012
	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
	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		300
	5.300% Fixed Senior Notes due June 1, 2042		500		500
	Unamortized discount		-23		-35
	Long-term debt, less amounts due currently — Oncor		5,202		5,090
	Bondco (b):
	4.950% Fixed Series 2003 Bonds due in semiannual installments through February 15, 2013		-		10
	5.420% Fixed Series 2003 Bonds due in semiannual installments through August 15, 2015		106		145
	5.290% Fixed Series 2004 Bonds due in semiannual installments through May 15, 2016		205		281
	Unamortized fair value discount related to transition bonds		-1		-1
	Less amount due currently		-131		-125
	Long-term debt, less amounts due currently — Bondco		179		310
	Total long-term debt, less amounts due currently	$	5,381	$	5,400
	__________
	(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” below for additional information.
	(b)The transition bonds are nonrecourse to Oncor and were issued to securitize a regulatory asset.
Schedule Of Long-Term Debt Maturity	'
	Year		Amount
	2014		$	131
	2015			639
	2016			41
	2017			324
	2018			550
	Thereafter			3,851
	Unamortized fair value discount			-1
	Unamortized discount			-23
	Total		$	5,512

Commitments_And_Contingencies_

Commitments And Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies [Abstract]	'
Schedule Of Future Miinimum Lease Payments Under Operating Leases	'
	Year	Amount
	2014	$	6
	2015		4
	2016		3
	2017		1
	2018		-
	Thereafter		-
	Total future minimum lease payments	$	14

Membership_Interests_Tables

Membership Interests (Tables)	12 Months Ended
	Dec. 31, 2013
Membership Interests [Abstract]	'
Schedule Of Distributions Paid	'
	During 2013, our board of directors declared, and we paid the following cash distributions to our members:
	Declaration Date		Payment Date	Amount
	29-Oct-13		31-Oct-13	$	95
	31-Jul-13		1-Aug-13	$	95
	1-May-13		2-May-13	$	70
	13-Feb-13		15-Feb-13	$	50
	During 2012, our board of directors declared, and we paid the following cash distributions to our members:
	Declaration Date		Payment Date	Amount
	24-Oct-12		30-Oct-12	$	70
	25-Jul-12		31-Jul-12	$	50
	25-Apr-12		1-May-12	$	60
	14-Feb-12		21-Feb-12	$	45
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, 2012	$	-28	$	-3	$	-31
	Defined benefit pension plans (net of tax)		-		-19		-19
	Amounts reclassified from accumulated other comprehensive income (loss) and reported in interest expense and related charges		2		-		2
	Balance at December 31, 2013	$	-26	$	-22	$	-48

Pension_and_Other_Postretireme1

Pension and Other Postretirement Employee Benefits Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]	'
Schedule Of Pension And OPEB Plan Costs	'
		Year Ended December 31,
		2013			2012			2011
	Pension costs	$	95		$	179		$	95
	OPEB costs		37			27			74
	Total benefit costs		132			206			169
	Less amounts deferred principally as property or a regulatory asset		-95			-169			-132
	Net amounts recognized as expense	$	37		$	37		$	37
Schedule Of Detailed Pension And OPEB Benefit Information	'
		Pension Plans									OPEB Plan
		Year Ended December 31,									Year Ended December 31,
		2013			2012			2011			2013			2012			2011
	Assumptions Used to Determine Net Periodic Pension and Benefit Cost:
	Discount rate (a)	4.10%			5.00%			5.50%			4.10%			4.95%			5.55%
	Expected return on plan assets	6.14%			7.40%			7.70%			6.70%			6.80%			7.10%
	Rate of compensation increase	3.94%			3.81%			3.74%			-			-				-
	Components of Net Pension and Benefit Cost:
	Service cost	$	26		$	23		$	20		$	6		$	5		$	7
	Interest Cost		122			106			110			36			39			54
	Expected return on assets		-123			-109			-99			-11			-12			-14
	Amortization of net transition obligation		-			-			-			-			1			1
	Amortization of prior service cost (credit)		-			-			1			-20			-20			-1
	Amortization of net loss		69			78			63			26			14			27
	Settlement charges		1			81			-			-			-			-
	Net periodic pension and benefit cost	$	95		$	179		$	95		$	37		$	27		$	74
	Other Changes in Plan Assets and Benefit Obligations Recognized as Regulatory Assets or in Other Comprehensive Income:
	Net loss (gain)	$	-139		$	110		$	106		$	-		$	83		$	-91
	Prior service cost (credit)		-			-			-			-			-			-127
	Amortization of net loss		-69			-78			-63			-26			-14			-27
	Amortization of transition obligation (asset)		-			-			-			-			-1			-1
	Amortization of prior service (cost) credit		-			-			-1			20			20			1
	Settlement charges		-1			-81			-			-			-			-
	Curtailment		-			-5			-			-			-			-
	Total recognized as regulatory assets or other comprehensive income		-209			-54			42			-6			88			-245
	Total recognized in net periodic pension and benefit costs and as regulatory assets or other comprehensive income	$	-114		$	125		$	137		$	31		$	115		$	-171
	_____________
	(a)As a result of the 2012 amendments discussed above, the discount rate reflected in net pension costs for January through July 2012 was 5.00%, for August through September 2012 was 4.15% and for October through December 2012 was 4.20%.
		Pension Plans									OPEB Plan
		Year Ended December 31,									Year Ended December 31,
		2013			2012			2011			2013			2012			2011
	Assumptions Used to Determine Benefit Obligations at Period End:
	Discount rate	4.74%			4.10%			5.00%			4.98%			4.10%			4.95%
	Rate of compensation increase	3.94%			3.94%			3.81%			-			-			-
		Pension Plans						OPEB Plan
		Year Ended December 31,						Year Ended December 31,
		2013			2012			2013			2012
	Change in Projected Benefit Obligation:
	Projected benefit obligation at beginning of year	$	3,038		$	2,215		$	913		$	809
	Service cost		26			23			6			5
	Interest cost		122			106			36			39
	Participant contributions		-			-			14			15
	Medicare Part D reimbursement		-			-			2			3
	Settlement		-3			-268			-			-
	Curtailment		-			-5			-			-
	Assumption of liabilities		-			860			-			6
	Actuarial (gain) loss		-183			198			10			94
	Benefits paid		-143			-91			-57			-58
	Projected benefit obligation at end of year	$	2,857		$	3,038		$	924		$	913
	Accumulated benefit obligation at end of year	$	2,752		$	2,908		$	-		$	-
	Change in Plan Assets:
	Fair value of assets at beginning of year	$	2,327		$	1,542		$	190		$	197
	Actual return (loss) on assets		80			199			21			25
	Employer contributions		9			93			11			11
	Settlement		-2			-268			-			-
	Assets related to assumed liabilities		-			852			-			-
	Participant contributions		-			-			14			15
	Benefits paid		-143			-91			-57			-58
	Fair value of assets at end of year	$	2,271		$	2,327		$	179		$	190
	Funded Status:
	Projected benefit obligation at end of year	$	-2,857		$	-3,038		$	-924		$	-913
	Fair value of assets at end of year		2,271			2,327			179			190
	Funded status at end of year	$	-586		$	-711		$	-745		$	-723
	Pension Plans						OPEB Plan
	Year Ended December 31,						Year Ended December 31,
	2013			2012			2013			2012
Amounts Recognized in the Balance Sheet Consist of:
Liabilities:
Other current liabilities	$	-3		$	-3		$	-		$	-
Other noncurrent liabilities		-583			-708			-745			-723
Net liability recognized	$	-586		$	-711		$	-745		$	-723
Regulatory assets:
Net loss	$	362		$	602		$	220		$	247
Prior service cost (credit)		-			-			-91			-111
Net regulatory asset recognized	$	362		$	602		$	129		$	136
Accumulated other comprehensive net loss	$	33		$	3		$	1		$	1
Schedule Of Assumed Health Care Cost Trend Rates	'
		Year Ended December 31,
		2013			2012
	Assumed Health Care Cost Trend Rates – Not Medicare Eligible:
	Health care cost trend rate assumed for next year	8.00%			8.50%
	Rate to which the cost trend is expected to decline (the ultimate trend rate)	5.00%			5.00%
	Year that the rate reaches the ultimate trend rate		2022			2022
	Assumed Health Care Cost Trend Rates – Medicare Eligible:
	Health care cost trend rate assumed for next year	7.00%			7.50%
	Rate to which the cost trend is expected to decline (the ultimate trend rate)	5.00%			5.00%
	Year that the rate reaches the ultimate trend rate		2021			2021
		1-Percentage Point Increase			1-Percentage Point Decrease
	Sensitivity Analysis of Assumed Health Care Cost Trend Rates:
	Effect on accumulated postretirement obligation	$	117		$	-97
	Effect on postretirement benefits cost		7			-6
Schedule Of Projected Benefit Obligations And Accumulated Benefit Obligations In Excess Of Plan Assets Fair Value	'
		At December 31,
		2013			2012
	Pension Plans with PBO and ABO in Excess of Plan Assets:
	Projected benefit obligations	$	2,857		$	3,038
	Accumulated benefit obligations		2,752			2,908
	Plan assets		2,271			2,327
Schedule Of Target Asset Allocation Ranges By Asset Category	'
			Target Allocation Ranges
	Asset Category		Recoverable		Nonrecoverable
	US equities		24% - 30%		—
	International equities		19% - 25%		—
	Fixed income		45% - 57%		100%
Schedule Of Expected Long-Term Rate Of Return On Assets Assumptions	'
	Pension Plans				OPEB Plan
	Asset Class		Expected Long-Term Rate of Return		Asset Class		Expected Long-Term Rate of Return
	International equity securities		7.83%		401(h) accounts		7.59%
	US equity securities		7.20%		Life insurance VEBA		6.71%
	Real estate		6.20%		Union VEBA		6.71%
	Credit strategies		5.87%		Non-union VEBA		3.80%
	Fixed income securities		5.30%		Weighted average		7.05%
	Weighted average (a)		7.39%
	_____________
	(a)The 2014 expected long-term rate of return for the nonregulated portion of the Oncor Retirement Plan is 4.72%.
Schedule Of Contributions	'
		Year Ended December 31,
		2013			2012			2011
	Pension plans contributions	$	9		$	93		$	175
	OPEB Plan contributions		11			11			18
	Total contributions	$	20		$	104		$	193
Schedule Of Estimated Future Benefit Payments	'
		2014			2015			2016			2017			2018			2019-23
	Pension plans	$	155		$	159		$	165		$	169		$	175		$	942
	OPEB Plan	$	45		$	49		$	52		$	55		$	57		$	316
Pension Plan [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Schedule Of Assets Fair Value Measured On Recurring Basis	'
			At December 31, 2013															At December 31, 2012
			Level 1				Level 2				Level 3			Total				Level 1			Level 2				Level 3		Total
	Asset Category
	Interest-bearing cash		$	-			$	160			$	-		$	160			$	-		$	134			$	-	$	134
	Equity securities:
	US			250				82				-			332				206			95				-		301
	International			337				7				-			344				280			7				-		287
	Fixed income securities:
	Corporate bonds (a)			-				1,265				-			1,265				-			1,319				-		1,319
	US Treasuries			-				108				-			108				-			206				-		206
	Other (b)			-				55				-			55				-			73				-		73
	Preferred securities			-				-				7			7				-			-				7		7
	Total assets		$	587			$	1,677			$	7		$	2,271			$	486		$	1,834			$	7	$	2,327
	_____________
	(a)Substantially all corporate bonds are rated investment grade by a major ratings agency such as Moody’s.
	(b)Other consists primarily of municipal bonds and fixed income derivative instruments.
OPEB [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Schedule Of Assets Fair Value Measured On Recurring Basis	'
			At December 31, 2013												At December 31, 2012
			Level 1			Level 2			Level 3			Total			Level 1			Level 2		Level 3			Total
	Asset Category
	Interest-bearing cash		$	-		$	6		$	-		$	6		$	-		$	10	$	-		$	10
	Equity securities:
	US			53			5			-			58			49			6		-			55
	International			35			-			-			35			31			-		-			31
	Fixed income securities:
	Corporate bonds (a)			-			34			-			34			-			42		-			42
	US Treasuries			-			1			-			1			-			4		-			4
	Other (b)			43			2			-			45			45			3		-			48
	Preferred securities			-			-			-			-			-			-		-			-
	Total assets		$	131		$	48		$	-		$	179		$	125		$	65	$	-		$	190
	_____________
	(a)Substantially all corporate bonds are rated investment grade by a major ratings agency such as Moody’s.
	(b)Other consists primarily of diversified bond mutual funds.

RelatedParty_Transactions_Tabl

Related-Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2013
Related-Party Transactions [Abstract]	'
Schedule Of Related Party Transactions	'
	Amounts payable to (receivable from) members related to income taxes under the agreement and reported on our balance sheet consisted of the following:
		At December 31, 2013							At December 31, 2012
		EFH Corp.			Texas Transmission		Total		EFH Corp.		Texas Transmission		Total
	Federal income taxes	$	-18		$	-5	$	-23	$	-	$	-	$	-
	Texas margin taxes		23			-		23		22		-		22
	Total payable (receivable)	$	5		$	-5	$	-	$	22	$	-	$	22
	Cash payments made to (received from) members related to income taxes consisted of the following:
		Year Ended December 31, 2013							Year Ended December 31, 2012
		EFH Corp.			Texas Transmission		Total		EFH Corp.		Texas Transmission		Total
	Federal income taxes (a)	$	78		$	11	$	89	$	-18	$	-5	$	-23
	Texas margin taxes (b)		12			-		12		21		-		21
	Total payments (receipts)	$	90		$	11	$	101	$	3	$	-5	$	-2
	______________
		(a)		Includes $33 million payment made to EFH Corp. in 2013 related to the 1997-2002 IRS appeals settlement.
		(b)		Includes $10 million refund received from EFH Corp. in 2013 related to 1997-2001 amended Texas franchise tax returns.

Supplementary_Financial_Inform1

Supplementary Financial Information (Tables)	12 Months Ended
	Dec. 31, 2013
Supplementary Financial Information [Abstract]	'
Schedule Of Other Income And Deductions	'
		Year Ended December 31,
		2013			2012			2011
	Other income:
	Accretion of fair value adjustment (discount) to regulatory assets due to purchase accounting	$	17		$	23		$	29
	Net gain on sale of other properties and investments		1			3			1
	Total other income	$	18		$	26		$	30
	Other deductions:
	Professional fees	$	3		$	3		$	4
	SARs exercise (Note 10)		2			57			-
	Other		10			4			5
	Total other deductions	$	15		$	64		$	9
Schedule Of Interest Expense And Related Charges	'
		Year Ended December 31,
		2013			2012			2011
	Interest expense	$	360		$	366		$	359
	Amortization of debt issuance costs and discounts		21			18			3
	Allowance for funds used during construction – capitalized interest portion		-10			-10			-3
	Total interest expense and related charges	$	371		$	374		$	359
Schedule Of Restricted Cash	'
		At December 31, 2013						At December 31, 2012
		Current Assets			Noncurrent Assets			Current Assets			Noncurrent Assets
	Customer collections related to transition bonds used only to service debt and pay expenses	$	52		$	-		$	55		$	-
	Reserve for fees associated with transition bonds		-			10			-			10
	Reserve for shortfalls of transition bond charges		-			6			-			6
	Total restricted cash	$	52		$	16		$	55		$	16
Schedule Of Trade Accounts Receivable	'
		At December 31,
		2013			2012
	Gross trade accounts receivable	$	527		$	395
	Trade accounts receivable from TCEH		-139			-55
	Allowance for uncollectible accounts		-3			-2
	Trade accounts receivable from nonaffiliates – net	$	385		$	338
Summary of Investment Balance	'
		At December 31,
		2013			2012
	Assets related to employee benefit plans, including employee savings programs	$	88		$	80
	Land		3			3
	Total investments and other property	$	91		$	83
Schedule Of Property, Plant And Equipment	'
			Composite Depreciation Rate/		At December 31,
			Avg. Life at December 31, 2013		2013			2012
	Assets in service:
	Distribution		4.1% / 24.6 years		$	10,055		$	9,745
	Transmission		2.8% / 35.8 years			6,133			5,482
	Other assets		9.1% / 11.0 years			868			856
	Total					17,056			16,083
	Less accumulated depreciation					5,725			5,407
	Net of accumulated depreciation					11,331			10,676
	Construction work in progress					556			627
	Held for future use					15			15
	Property, plant and equipment – net				$	11,902		$	11,318
Schedule Of Intangible Assets	'
		At December 31, 2013									At December 31, 2012
		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	$	440		$	82		$	358		$	295		$	79	$	216
	Capitalized software		385			189			196			409			220		189
	Total	$	825		$	271		$	554		$	704		$	299	$	405
Schedule Of Estimated Aggregate Amortization Expenses	'
	Year		Amortization Expense
	2014		$	55
	2015			55
	2016			52
	2017			44
	2018			40
Schedule Of Other Noncurrent Liabilities And Deferred Credits	'
		At December 31,
		2013			2012
	Retirement plans and other employee benefits	$	1,399		$	1,495
	Uncertain tax positions (including accrued interest)		56			169
	Amount payable related to income taxes		17			-
	Investment tax credits		20			24
	Other		62			58
	Total other noncurrent liabilities and deferred credits	$	1,554		$	1,746
Schedule Of Supplemental Cash Flow Information	'
		Year Ended December 31,
		2013			2012			2011
	Cash payments (receipts) related to:
	Interest	$	361		$	378		$	360
	Capitalized interest		-10			-10			-3
	Interest (net of amounts capitalized)		351			368			357
	Amount in lieu of income taxes:
	Federal		89			-23			-134
	State		12			21			20
	Total amount in lieu of income taxes		101			-2			-114
	SARs exercise		4			64			-
	Noncash construction expenditures (a)		84			103			140
	______________
	(a)Represents end-of-period accruals.
Schedule Of Quarterly Information	'
	2013		First Quarter			Second Quarter			Third Quarter			Fourth Quarter
	Operating revenues		$	817		$	857		$	966		$	912
	Operating income			180			189			239			190
	Net income			87			96			146			103
	2012		First Quarter			Second Quarter			Third Quarter			Fourth Quarter
	Operating revenues		$	783		$	828		$	925		$	792
	Operating income			157			188			230			156
	Net income (a)			75			107			139			28
	______________
	(a)Fourth quarter 2012 reflects a $57 million pre-tax charge to expense associated with the SARs settlement (see Note 10

Description_Of_Business_and_Si2

Description Of Business and Significant Accounting Policies (Details) (USD $)	1 Months Ended	12 Months Ended
	Nov. 30, 2008	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2004	Dec. 31, 2003
Description of Business [Line Items]	'	'	'	'	'	'
Principal amount of transition bonds issued	'	'	'	'	$1,300,000,000	$1,300,000,000
Long-lived assets and goodwill impairments	'	0	0	0	'	'
Percentage of equity interest sold in the event of bankruptcy	19.75%	'	'	'	'	'
Equity AFUDC	'	$0	$1,000,000	$0	'	'
Sales [Member] | TCEH [Member]	'	'	'	'	'	'
Description of Business [Line Items]	'	'	'	'	'	'
Concentration Risk Percentage	'	27.00%	29.00%	33.00%	'	'
Oncor [Member]	'	'	'	'	'	'
Description of Business [Line Items]	'	'	'	'	'	'
Percentage of membership interest owned by company	'	80.03%	'	'	'	'
Texas Transmission [Member]	'	'	'	'	'	'
Description of Business [Line Items]	'	'	'	'	'	'
Percentage of membership interest owned by non-controlling owners	'	19.75%	'	'	'	'

Regulatory_Matters_Details

Regulatory Matters (Details)	Dec. 31, 2013
	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

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013
In Millions, unless otherwise specified				EFH Corp [Member]	EFH Corp [Member]	EFH Corp [Member]	EFH Corp [Member]
Related Party Transaction [Line Items]	'	'	'	'	'	'	'
Liability in lieu of deferred income taxes	$2,414	$2,180	'	'	'	'	'
Alternative minimum tax credit carryforward	21	52	'	'	'	'	'
Net operating loss carryforwards	162	'	'	'	'	'	'
Increase (Decrease) in liability for uncertain tax positions	'	'	'	'	'	-32	'
Increase (Decrease) in liability for deferred income taxes	'	'	'	'	'	-10	58
Reversal of accrued interest and tax	'	'	'	'	3	5	18
Reversal of accrued interest and tax after tax	'	'	'	'	'	3	12
Income tax payments to members	'	'	'	33	'	'	'
Income tax refunds from members	'	'	'	10	'	'	'
Uncertain tax positions related to timing of recognition	51	133	'	'	'	'	76
Accrued interest	2	25	'	'	'	'	'
Expense (benefit) from interest and penalties	-15	3	2	'	'	'	'
Potential reduction in liability	$3	'	'	'	'	'	'

Income_Taxes_Components_Of_Inc

Income Taxes (Components Of Income Tax Provisions (Benefits)) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]	'	'	'
Current: US federal	$51	$23	($55)
Current: State	12	21	21
Deferred: US federal	181	200	248
Deferred: State	6	'	'
Amortization of investment tax credits	-3	-4	-5
Total reported in operating expenses	247	240	209
US federal	-5	-14	9
State	'	'	1
Deferred federal	7	8	10
Total	2	-6	20
Total provision in lieu of income taxes	$249	$234	$229

Income_Taxes_Schedule_Of_Incom

Income Taxes (Schedule Of Income Tax Reconciliation) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]	'	'	'
Income before provision in lieu of income taxes	$681	$583	$596
Provision in lieu of income taxes at the US federal statutory rate of 35%	238	204	209
Amortization of investment tax credits - net of deferred tax effect	-3	-4	-5
Amortization (under regulatory accounting) of statutory tax rate changes	-2	-3	-3
Amortization of Medicare subsidy regulatory asset	14	14	'
Texas margin tax, net of federal tax benefit	15	14	14
Nondeductible losses (gains) on benefit plan investments	-3	-2	-1
Other, including audit settlements	-10	11	15
Total provision in lieu of income taxes	$249	$234	$229
Effective rate	36.60%	40.10%	38.40%
US federal statutory rate	35.00%	35.00%	35.00%

Income_Taxes_Schedule_Of_Chang

Income Taxes (Schedule Of Changes To Uncertain Tax Positions) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]	'		'	'
Balance at January 1, excluding interest and penalties	$144		$126	$82
Additions based on tax positions related to prior years	'		18	44
Reductions based on tax positions related to prior years	-66	[1]	'	'
Reduction related to 1997-2002 IRS appeals settlement	-24		'	'
Balance at December 31, excluding interest and penalties	$54		$144	$126
[1]	Includes IRS audit for the years 2003 through 2006.

Regulatory_Assets_and_Liabilit2

Regulatory Assets and Liabilities (Narrative) (Details) (USD $)

12 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Oct. 10, 2007

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Residential Retail Customer [Member]

Minimum [Member]

Maximum [Member]

Over Collection of Transition Bond Revenues [Member]

Over Collection of Transition Bond Revenues [Member]

Over Collection of Transition Bond Revenues [Member]

Deferred AMS Costs [Member]

Deferred AMS Costs [Member]

Generation Related Regulatory Assets Securitized by Transition Bonds [Member]

Generation Related Regulatory Assets Securitized by Transition Bonds [Member]

Bondco [Member]

Bondco [Member]

Non-Residential Retail Customer [Member]

Non-Residential Retail Customer [Member]

Regulatory Liabilities [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reduction in regulatory assets net of regulatory liability

'

'

'

'

'

'

'

'

'

'

$213,000,000

'

'

'

Regulatory assets

1,771,000,000

2,093,000,000

'

'

'

'

'

'

62,000,000

2,000,000

281,000,000

[1],[2]

409,000,000

[1],[2]

'

'

Expected surcharge

1,023,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Recovery period

'11 years

'

'

'

'

'9 years

'

'

'

'

'

'

'

'

Cost recovery factor

'

'

2.19

2.39

5.15

'

'

'

'

'

'

'

'

'

Net regulatory asset

$1,324,000,000

$1,788,000,000

'

'

'

'

$35,000,000

$33,000,000

$62,000,000

$2,000,000

$261,000,000

$368,000,000

$226,000,000

$335,000,000

[1]

Not earning a return in the regulatory rate-setting process.

[2]

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. Bondco net regulatory assets of $335 million at December 31, 2012 consisted of $368 million included in generation-related regulatory assets net of the regulatory liability for over-collection of transition bond revenues of $33 million.In August 2011, the PUCT issued a final order in our rate review filed in January 2011. The rate review included a determination of the recoverability of regulatory assets at June 30, 2010, including the recoverability period of those assets deemed allowable by the PUCT.In accordance with the PUCTbs August 2009 order in our rate review, the remaining net book value and the approved amount of removal cost of existing conventional meters that were replaced by advanced meters are being charged to depreciation and amortization expense over an 11-year cost recovery period.In September 2008, the PUCT approved a settlement for us to recover our estimated future investment for advanced metering deployment. We began billing the AMS surcharge in the January 2009 billing month cycle. The surcharge is expected to total $1.023 billion over the 11-year recovery period and includes a cost recovery factor of $2.19 per month per residential retail customer and $2.39 to $5.15 per month for non-residential retail customers. We account for the difference between the surcharge billings for advanced metering facilities and the allowable revenues under the surcharge provisions, which are based on expenditures and an allowed return, as a regulatory asset or liability. Such differences arise principally as a result of timing of expenditures. As indicated in the table above, the regulatory asset at December 31, 2013 and 2012 totaled $62 million and $2 million, respectively.As a result of purchase accounting, in 2007 the carrying value of certain generation-related regulatory assets securitized by transition bonds, which have been reviewed and approved by the PUCT for recovery but without earning a rate of return, was reduced by $213 million. This amount will be accreted to other income over the recovery period remaining at October 10, 2007 (approximately nine years). See Note 11 for information regarding nuclear decommissioning cost recovery.

Regulatory_Assets_and_Liabilit3

Regulatory Assets and Liabilities (Components Of Regulatory Assets And Liabilities) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Regulatory Assets And Liabilities [Line Items]	'		'
Carrying Amount, Regulatory Assets	$1,771		$2,093
Carrying Amount, Regulatory Liabilities	447		305
Net regulatory asset	1,324		1,788
Estimated Net Removal Costs [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Life of utility plant		'
Carrying Amount, Regulatory Liabilities	385		244
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	23		28
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	35	[1],[2]	33	[1],[2]
Net regulatory asset	35		33
Energy Efficiency Programs [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Not applicable	[1]	'
Carrying Amount, Regulatory Liabilities	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	281	[1],[2]	409	[1],[2]
Net regulatory asset	261		368
Employee Retirement Costs [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'6 years		'
Carrying Amount, Regulatory Assets	71		87
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	224	[3],[4]	186	[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	491	[1],[4],[5]	738	[1],[4],[5]
Self Insurance Reserve (Primarily Storm Recovery Costs) - Net [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'6 years		'
Carrying Amount, Regulatory Assets	158		190
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	196	[3],[4]	128	[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	32		41
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	5		22
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	42		71
Rate Review Expenses [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Largely 2 years	[1],[2]	'
Carrying Amount, Regulatory Assets	4	[1],[2]	6	[1],[2]
Advanced Meter Customer Education Costs [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'6 years		'
Carrying Amount, Regulatory Assets	8		10
Deferred Conventional Meter And Metering Facilities Depreciation [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Largely 7 years		'
Carrying Amount, Regulatory Assets	146		152
Deferred AMS Costs [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'6 years		'
Carrying Amount, Regulatory Assets	62		2
Net regulatory asset	62		2
Energy Efficiency Performance Bonus [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'1 year	[1]	'
Carrying Amount, Regulatory Assets	12	[1]	9	[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	37	[1]	40	[1]
Energy Efficiency Programs [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Not applicable	[1]	'
Carrying Amount, Regulatory Assets	'		1	[1]
Other Regulatory Assets [Member]	'		'
Regulatory Assets And Liabilities [Line Items]	'		'
Remaining Rate Recovery/Amortization Period	'Various		'
Carrying Amount, Regulatory Assets	$2		$1
[1]	Not earning a return in the regulatory rate-setting process.
[2]	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. Bondco net regulatory assets of $335 million at December 31, 2012 consisted of $368 million included in generation-related regulatory assets net of the regulatory liability for over-collection of transition bond revenues of $33 million.In August 2011, the PUCT issued a final order in our rate review filed in January 2011. The rate review included a determination of the recoverability of regulatory assets at June 30, 2010, including the recoverability period of those assets deemed allowable by the PUCT.In accordance with the PUCTbs August 2009 order in our rate review, the remaining net book value and the approved amount of removal cost of existing conventional meters that were replaced by advanced meters are being charged to depreciation and amortization expense over an 11-year cost recovery period.In September 2008, the PUCT approved a settlement for us to recover our estimated future investment for advanced metering deployment. We began billing the AMS surcharge in the January 2009 billing month cycle. The surcharge is expected to total $1.023 billion over the 11-year recovery period and includes a cost recovery factor of $2.19 per month per residential retail customer and $2.39 to $5.15 per month for non-residential retail customers. We account for the difference between the surcharge billings for advanced metering facilities and the allowable revenues under the surcharge provisions, which are based on expenditures and an allowed return, as a regulatory asset or liability. Such differences arise principally as a result of timing of expenditures. As indicated in the table above, the regulatory asset at December 31, 2013 and 2012 totaled $62 million and $2 million, respectively.As a result of purchase accounting, in 2007 the carrying value of certain generation-related regulatory assets securitized by transition bonds, which have been reviewed and approved by the PUCT for recovery but without earning a rate of return, was reduced by $213 million. This amount will be accreted to other income over the recovery period remaining at October 10, 2007 (approximately nine years). See Note 11 for information regarding nuclear decommissioning cost recovery.
[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 $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
	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	745,000,000	735,000,000
Outstanding borrowing, interest rate	1.67%	1.46%
Letters of credit	6,000,000	6,000,000
Commitment fee	0.23%	'
Borrowing capacity available under the credit facility	1,649,000,000	1,659,000,000
Percentage of fair value and cost of property additions	85.00%	'
Available bond credits	2,176,000,000	'
Additional potential indebtedness	1,173,000,000	'
Maximum indebtness amount before default	100,000,000	'
Maximum judgement for payment amount before default	$50,000,000	'
Discharge period	'60 years	'
Maximum [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Commitment rate reduction under the revolving credit facility	0.28%	'
Required debt-to-capitalization ratio	1	'
Debt-to-capitalization ratio	1	'
Minimum [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Commitment rate reduction under the revolving credit facility	0.10%	'
Required debt-to-capitalization ratio	0.65	'
Debt-to-capitalization ratio	0.45	'
Letter of Credit [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Outstanding borrowing, interest rate	1.70%	'
London Interbank Offered Rate (LIBOR) [Member]	'	'
Line of Credit Facility [Line Items]	'	'
Spread over variable rate	1.50%	'
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 $)

1 Months Ended

12 Months Ended

1 Months Ended

1 Months Ended

31-May-12

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

31-May-13

Nov. 30, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

31-May-12

Dec. 31, 2013

31-May-12

Dec. 31, 2013

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

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

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

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

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

5.950% Senior Secured Notes Due September 1, 2013 [Member]

Transition Bond [Member]

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

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

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

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

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repayments of long-term debt

'

$125,000,000

$1,018,000,000

$113,000,000

'

'

'

'

'

'

'

'

'

'

'

Debt principal amount

'

'

'

'

'

100,000,000

'

'

376,000,000

524,000,000

118,000,000

'

'

'

'

Percentage of interest

'

'

'

'

4.55%

'

'

6.38%

6.38%

5.95%

'

4.10%

4.10%

5.30%

5.30%

Proceeds from sale of Notes

890,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from issuance of debt

'

'

'

'

107,000,000

'

'

'

'

'

'

'

'

'

'

Note redemption price to principal amount, percentage

'

100.00%

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

Make-whole amount

'

'

33,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of long-term debt

'

100,000,000

900,000,000

300,000,000

'

'

'

'

'

'

'

400,000,000

'

500,000,000

'

Percentage of fair value of cost of property additions certified to the Deed of Trust collateral agent

'

85.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Available bond credits

'

2,176,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Future debt subject to property additions to the Deed of Trust

'

1,173,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated fair value of our long-term debt including current maturities

'

6,188,000,000

6,568,000,000

'

'

'

'

'

'

'

'

'

'

'

'

Carrying amount

'

$5,512,000,000

$5,525,000,000

'

'

'

$300,000,000

'

'

'

'

'

'

'

'

LongTerm_Debt_Schedule_Of_Long

Long-Term Debt (Schedule Of Long-Term Debt) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		31-May-12
Debt Instrument [Line Items]	'		'		'
Unamortized discount	($23)		'		'
Less amount due currently	-131		-125		'
Total long-term debt, less amounts due currently	5,381		5,400		'
6.375% Fixed Senior Notes Due January 15, 2015 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	500	[1]	500	[1]	'
Percentage of interest	6.38%		6.38%		'
Due date	15-Jan-15		'		'
5.000% Fixed Senior Notes Due September 30, 2017 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	324	[1]	324	[1]	'
Percentage of interest	5.00%		'		'
Due date	30-Sep-17		'		'
6.800% Fixed Senior Notes Due September 1, 2018 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	550	[1]	550	[1]	'
Percentage of interest	6.80%		'		'
Due date	1-Sep-18		'		'
5.750% Fixed Senior Notes Due September 30, 2020 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	126	[1]	126	[1]	'
Percentage of interest	5.75%		'		'
Due date	30-Sep-20		'		'
4.100% Fixed Senior Notes Due June 1, 2022 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	400	[1]	400	[1]	'
Percentage of interest	4.10%		'		4.10%
Due date	1-Jun-22		'		'
7.000% Fixed Debentures Due September 1, 2022 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	800	[1]	800	[1]	'
Percentage of interest	7.00%		'		'
Due date	1-Sep-22		'		'
7.000% Fixed Senior Notes Due May 1, 2032 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	500	[1]	500	[1]	'
Percentage of interest	7.00%		'		'
Due date	1-May-32		'		'
7.250% Fixed Senior Notes Due January 15, 2033 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	350	[1]	350	[1]	'
Percentage of interest	7.25%		'		'
Due date	15-Jan-33		'		'
7.500% Fixed Senior Notes Due September 1, 2038 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	300	[1]	300	[1]	'
Percentage of interest	7.50%		'		'
Due date	1-Sep-38		'		'
5.250% Fixed Senior Notes Due September 30, 2040 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	475	[1]	475	[1]	'
Percentage of interest	5.25%		'		'
Due date	30-Sep-40		'		'
4.550% Fixed Senior Notes Due December 1, 2041 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	400	[1]	300	[1]	'
Percentage of interest	4.55%		'		'
Due date	1-Dec-41		'		'
5.300% Fixed Senior Notes Due June 1, 2042 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Senior Note	500	[1]	500	[1]	'
Percentage of interest	5.30%		'		5.30%
Due date	1-Jun-42		'		'
4.950% Fixed Series 2003 Bonds Due Through February 15, 2013 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Bonds	'		10	[2]	'
Percentage of interest	4.95%		'		'
Due date	15-Feb-13		'		'
5.420% Fixed Series 2003 Bonds Due Through August 15, 2015 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Bonds	106	[2]	145	[2]	'
Percentage of interest	5.42%		'		'
Due date	15-Aug-15		'		'
5.290% Fixed Series 2004 Bonds Due Through May 15, 2016 [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Fixed Bonds	205	[2]	281	[2]	'
Percentage of interest	5.29%		'		'
Due date	15-May-16		'		'
Oncor [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Unamortized discount	-23	[1]	-35	[1]	'
Total long-term debt, less amounts due currently	5,202	[1]	5,090	[1]	'
Bondco [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Unamortized discount	-1	[2]	-1	[2]	'
Less amount due currently	-131	[2]	-125	[2]	'
Total long-term debt, less amounts due currently	$179	[2]	$310	[2]	'
[1]	Secured by first priority lien on certain transmission and distribution assets equally and ratably with all of Oncorbs other secured indebtedness. See bDeed of Trustb below for additional information.
[2]	The transition bonds are nonrecourse to Oncor and were issued to securitize a regulatory asset.

LongTerm_Debt_Schedule_Of_Long1

Long-Term Debt (Schedule Of Long-Term Debt Maturity) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Borrowings Under Credit Facilities And Long-Term Debt [Abstract]	'	'
2014	$131	'
2015	639	'
2016	41	'
2017	324	'
2018	550	'
Thereafter	3,851	'
Unamortized fair value discount	-1	'
Unamortized discount	-23	'
Total	$5,512	$5,525

Recovered_Sheet2

Commitments and Contingencies (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies [Abstract]	'	'	'
Rent expenses	$10	$15	$15
Required efficiency spending amount	62	'	'
Aggregate maximum amount of residual values guaranteed	7	'	'
Average life of the residual value guarantees under the lease portfolio	'2 years 2 months 12 days	'	'
Guarantee of repayment of borrowings	'	$7	'

Commitments_And_Contingencies_1

Commitments And Contingencies (Schedule Of Future Miinimum Lease Payments Under Operating Leases) (Details) (USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
Commitments and Contingencies [Abstract]	'
2014	$6
2015	4
2016	3
2017	1
Total future minimum lease payments	$14

Membership_Interests_Narrative

Membership Interests (Narrative) (Details) (USD $)	12 Months Ended			0 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 19, 2014
				Subsequent Event [Member]
Noncontrolling Interest [Line Items]	'	'	'	'
Declaration of cash distribution to members	$310	$225	$145	$53
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	$192	'	'	'

Membership_Interests_Schedule_

Membership Interests (Schedule Of Distributions Paid) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Dividends Payable [Line Items]	'	'	'
Amount	$310	$225	$145
Payment Four FY 2013 [Member]	'	'	'
Dividends Payable [Line Items]	'	'	'
Declaration Date	29-Oct-13	'	'
Payment Date	31-Oct-13	'	'
Amount	95	'	'
Payment Three FY 2013 [Member]	'	'	'
Dividends Payable [Line Items]	'	'	'
Declaration Date	31-Jul-13	'	'
Payment Date	1-Aug-13	'	'
Amount	95	'	'
Payment Two FY 2013 [Member]	'	'	'
Dividends Payable [Line Items]	'	'	'
Declaration Date	1-May-13	'	'
Payment Date	2-May-13	'	'
Amount	70	'	'
Payment One FY 2013 [Member]	'	'	'
Dividends Payable [Line Items]	'	'	'
Declaration Date	13-Feb-13	'	'
Payment Date	15-Feb-13	'	'
Amount	50	'	'
Payment Four FY 2012 [Member]	'	'	'
Dividends Payable [Line Items]	'	'	'
Declaration Date	'	24-Oct-12	'
Payment Date	'	30-Oct-12	'
Amount	'	70	'
Payment Three FY 2012 [Member]	'	'	'
Dividends Payable [Line Items]	'	'	'
Declaration Date	'	25-Jul-12	'
Payment Date	'	31-Jul-12	'
Amount	'	50	'
Payment Two FY 2012 [Member]	'	'	'
Dividends Payable [Line Items]	'	'	'
Declaration Date	'	25-Apr-12	'
Payment Date	'	1-May-12	'
Amount	'	60	'
Payment One FY 2012 [Member]	'	'	'
Dividends Payable [Line Items]	'	'	'
Declaration Date	'	14-Feb-12	'
Payment Date	'	21-Feb-12	'
Amount	'	$45	'

Membership_Interests_Schedule_1

Membership Interests (Schedule Of Changes To Accumulated Other Comprehensive Income (Loss)) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
In Millions, unless otherwise specified					Cash Flow Hedges - Interest Rate Swap [Member]	Defined Benefit Pension and OPEB Plans [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'	'	'	'
Balance at beginning of period	($48)	($31)	($31)	($2)	($28)	($3)	($31)
Defined benefit pension plans (net of tax)	'	'	'	'	'	-19	-19
Amounts reclassified from accumulated other comprehensive income (loss) and reported in interest expense and related charges	'	'	'	'	2	'	2
Balance at end of period	($48)	($31)	($31)	($2)	($26)	($22)	($48)

Pension_and_Other_Postretireme2

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

12 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Minimum [Member]

Maximum [Member]

Oncor Retirement Plan [Member]

Pension And OPEB [Member]

Pension And OPEB [Member]

EFH Retirement Plan [Member]

EFH Retirement Plan [Member]

Defined Benefit Pension Plans [Member]

Defined Benefit Pension Plans [Member]

Defined Benefit Pension Plans [Member]

OPEB Plan [Member]

OPEB Plan [Member]

OPEB Plan [Member]

Oncor Cash Balance Formula Retirement Plan [Member]

Oncor Traditional Retirement Plan Formula Retirement Plan [Member]

Thrift Plan [Member]

Thrift Plan [Member]

Thrift Plan [Member]

item

item

2014 [Member]

2014 To 2018 [Member]

2014 [Member]

2014 To 2018 [Member]

Defined Benefit Plan Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Regulatory assets

$1,771

$2,093

'

'

'

'

$786

$1,011

'

'

'

'

'

'

'

'

'

'

'

'

'

Earning period

'3 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash contributions

20

104

193

'

'

'

'

'

259

'

'

'

'

'

'

'

'

'

13

12

12

Rolling period

'4 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of gains and losses

25.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of corporate bonds

'

'

'

'

'

1,095

'

'

'

389

'

'

'

'

'

'

'

'

'

'

'

Amortization of net actuarial loss

'

'

'

'

'

'

'

'

'

'

39

'

'

26

'

'

'

'

'

'

'

Amortization of prior service costs

'

'

'

'

'

'

'

'

'

'

1

'

'

20

'

'

'

'

'

'

'

Funded status of plans

'

'

'

'

'

'

'

'

'

'

'

$87

$408

'

$15

$139

'

'

'

'

'

Percentage of regular salary

75.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Contribution by employee, percentage

'

'

'

1.00%

20.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of employee's contribution match by employer

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

75.00%

'

'

'

Percentage of employee's contribution matched 100% by employer

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6.00%

6.00%

'

'

'

Recovered_Sheet3

Pension And Other Postretirement Employee Benefits Plans (Schedule Of Pension And OPEB Plan Costs) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Total benefit costs	$132	$206	$169
Less amounts deferred principally as property or a regulatory asset	-95	-169	-132
Net amounts recognized as expense	37	37	37
Pension Plan [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Total benefit costs	95	179	95
OPEB [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Total benefit costs	$37	$27	$74

Pension_and_Other_Postretireme3

Pension and Other Postretirement Employee Benefits Plans (Recognized Net Periodic Pension And Benefit Costs) (Details) (USD $)	2 Months Ended	3 Months Ended	7 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2012	Jul. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'		'		'
Discount rate	4.15%	4.20%	5.00%	'		'		'
Net costs	'	'	'	$132		$206		$169
Pension Plan [Member]	'	'	'	'		'		'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'		'		'
Discount rate	'	'	'	4.10%	[1]	5.00%	[1]	5.50%	[1]
Expected return on plan assets	'	'	'	6.14%		7.40%		7.70%
Rate of compensation increase	'	'	'	3.94%		3.81%		3.74%
Service cost	'	'	'	26		23		20
Interest cost	'	'	'	122		106		110
Expected return on assets	'	'	'	-123		-109		-99
Amortization of prior service costs (credit)	'	'	'	'		'		1
Amortization of net loss	'	'	'	69		78		63
Settlement charges	'	'	'	1		81		'
Net costs	'	'	'	95		179		95
Total recognized in net periodic pension and benefit costs and as regulatory assets or other comprehensive income	'	'	'	-114		125		137
OPEB [Member]	'	'	'	'		'		'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'		'		'
Discount rate	'	'	'	4.10%	[1]	4.95%	[1]	5.55%	[1]
Expected return on plan assets	'	'	'	6.70%		6.80%		7.10%
Service cost	'	'	'	6		5		7
Interest cost	'	'	'	36		39		54
Expected return on assets	'	'	'	-11		-12		-14
Amortization of net transition obligation	'	'	'	'		1		1
Amortization of prior service costs (credit)	'	'	'	-20		-20		-1
Amortization of net loss	'	'	'	26		14		27
Net costs	'	'	'	37		27		74
Total recognized in net periodic pension and benefit costs and as regulatory assets or other comprehensive income	'	'	'	$31		$115		($171)
[1]	As a result of the 2012 amendments discussed above, the discount rate reflected in net pension costs for January through July 2012 was 5.00%, for August through September 2012 was 4.15% and for October through December 2012 was 4.20%.

Recovered_Sheet4

Pension And Other Postretirement Employee Benefits Plans (Benefit Obligations Recognized In Other Comprehensive Income) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Plan [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Net loss (gain)	($139)	$110	$106
Amortization of net loss	-69	-78	-63
Amortization of prior service (costs) credit	'	'	-1
Amortization of prior service (costs) credit	'	'	-1
Settlement charges	-1	-81	'
Curtailment	'	-5	'
Total recognized as regulatory assets or other comprehensive income	-209	-54	42
Total recognized in net periodic pension and benefit costs and as regulatory assets or other comprehensive income	-114	125	137
OPEB [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Net loss (gain)	'	83	-91
Prior service cost (credit)	'	'	-127
Amortization of net loss	-26	-14	-27
Amortization of transition obligation (asset)	'	-1	-1
Amortization of prior service (costs) credit	20	20	1
Amortization of prior service (costs) credit	20	20	1
Total recognized as regulatory assets or other comprehensive income	-6	88	-245
Total recognized in net periodic pension and benefit costs and as regulatory assets or other comprehensive income	$31	$115	($171)

Recovered_Sheet5

Pension And Other Postretirement Employee Benefit Plans (Assumptions Used To Determine Benefit Obligations) (Details)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Plan [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Discount rate	4.74%	4.10%	5.00%
Rate of compensation increase	3.94%	3.94%	3.81%
OPEB [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Discount rate	4.98%	4.10%	4.95%

Recovered_Sheet6

Pension And Other Postretirement Employee Benefit Plans (Change In Project Benefit Obligations) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Plan [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Projected benefit obligation at beginning of year	$3,038	$2,215	'
Service cost	26	23	20
Interest cost	122	106	110
Settlement	-3	-268	'
Curtailment	'	-5	'
Assumption of liabilities	'	860	'
Actuarial (gain) loss	-183	198	'
Benefits paid	-143	-91	'
Projected benefit obligation at end of year	2,857	3,038	2,215
Accumulated benefit obligation at end of year	2,752	2,908	'
OPEB [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Projected benefit obligation at beginning of year	913	809	'
Service cost	6	5	7
Interest cost	36	39	54
Participant contributions	14	15	'
Medicare Part D reimbursement	2	3	'
Assumption of liabilities	'	6	'
Actuarial (gain) loss	10	94	'
Benefits paid	-57	-58	'
Projected benefit obligation at end of year	$924	$913	$809

Pension_And_Other_Postretireme4

Pension And Other Postretirement Employee Benefit Plans (Change In Plan Assets) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Employer contributions	$20	$104	$193
Pension Plan [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair value of assets at beginning of year	2,327	1,542	'
Actual return (loss) on assets	80	199	'
Employer contributions	9	93	175
Settlement	-2	-268	'
Assets related to assumed liability	'	852	'
Benefits paid	-143	-91	'
Fair value of assets at end of year	2,271	2,327	1,542
OPEB [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair value of assets at beginning of year	190	197	'
Actual return (loss) on assets	21	25	'
Employer contributions	11	11	18
Participant contributions	14	15	'
Benefits paid	-57	-58	'
Fair value of assets at end of year	$179	$190	$197

Pension_And_Other_Postretireme5

Pension And Other Postretirement Employee Benefit Plans (Funded Status) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Pension Plan [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Projected benefit obligation at end of year	($2,857)	($3,038)	($2,215)
Fair value of assets at end of year	2,271	2,327	1,542
Funded status at end of year	-586	-711	'
OPEB [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Projected benefit obligation at end of year	-924	-913	-809
Fair value of assets at end of year	179	190	197
Funded status at end of year	($745)	($723)	'

Pension_And_Other_Postretireme6

Pension And Other Postretirement Employee Benefits Plans (Amounts Recognized In Balance Sheet) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Millions, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Accumulated other comprehensive net loss	($48)	($31)	($31)	($2)
Pension Plan [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Other current liabilities	-3	-3	'	'
Other noncurrent liabilities	-583	-708	'	'
Net liability recognized	-586	-711	'	'
Net loss	362	602	'	'
Net regulatory asset recognized	362	602	'	'
Accumulated other comprehensive net loss	33	3	'	'
OPEB [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Other noncurrent liabilities	-745	-723	'	'
Net liability recognized	-745	-723	'	'
Net loss	220	247	'	'
Prior service cost (credit)	-91	-111	'	'
Net regulatory asset recognized	129	136	'	'
Accumulated other comprehensive net loss	$1	$1	'	'

Pension_And_Other_Postretireme7

Pension And Other Postretirement Employee Benefits Plans (Schedule Of Assumed Health Care Cost Trend Rates) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Healthcare Eligibility [Line Items]	'	'
Effect on accumulated postretirement obligation, 1-Percentage Point Increase	$117	'
Effect on accumulated postretirement obligation, 1-Percentage Point Decrease	'	-97
Effect on postretirement benefits cost, 1-Percentage Point Increase	7	'
Effect on postretirement benefits cost, 1-Percentage Point Decrease	'	($6)
Not Medicare Eligible [Member]	'	'
Healthcare Eligibility [Line Items]	'	'
Health care cost trend rate assumed for next year	8.00%	8.50%
Rate to which the cost trend is expected to decline (the ultimate trend rate)	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	'2022	'2022
Medicare Eligible [MEmber]	'	'
Healthcare Eligibility [Line Items]	'	'
Health care cost trend rate assumed for next year	7.00%	7.50%
Rate to which the cost trend is expected to decline (the ultimate trend rate)	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	'2021	'2021

Pension_And_Other_Postretireme8

Pension And Other Postretirement Employee Benefits Plans (Schedule Of Projected Benefit Obligations And Accumulated Benefit Obligations In Excess Of Plan Assets Fair Value) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Pension and Other Postretirement Employee Benefits Plans [Abstract]	'	'
Projected benefit obligations	$2,857	$3,038
Accumulated benefit obligations	2,752	2,908
Plan assets	$2,271	$2,327

Pension_And_Other_Postretireme9

Pension And Other Postretirement Employee Benefits Plans (Schedule Of Target Asset Allocation Ranges By Asset Category) (Details)	12 Months Ended
	Dec. 31, 2013
US Equities [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Target asset allocation, Recoverable, Minimum	24.00%
Target asset allocation, Recoverable, Maximum	30.00%
International Equities [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Target asset allocation, Recoverable, Minimum	19.00%
Target asset allocation, Recoverable, Maximum	25.00%
Fixed Income [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Target asset allocation, Recoverable, Minimum	45.00%
Target asset allocation, Recoverable, Maximum	57.00%
Target asset allocation, Nonrecoverable	100.00%

Recovered_Sheet7

Pension And Other Postretirement Employee Benefits Plans (Schedule Of Assets Fair Value Measured On Recurring Basis) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Millions, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	$2,271		$2,327
Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	2,271		2,327
OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	179		190
US Equities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	332		301
US Equities [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	58		55
International Equities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	344		287
International Equities [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	35		31
Corporate Bond Securities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	1,265	[1]	1,319	[1]
Corporate Bond Securities [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	34	[1]	42	[1]
US Treasury Securities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	108	[1]	206	[1]
US Treasury Securities [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	1		4
Other [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	55	[2]	73	[2]
Other [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	45	[3]	48	[3]
Preferred Securities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	7		7
Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	587		486
Fair Value, Inputs, Level 1 [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	131		125
Fair Value, Inputs, Level 1 [Member] | US Equities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	250		206
Fair Value, Inputs, Level 1 [Member] | US Equities [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	53		49
Fair Value, Inputs, Level 1 [Member] | International Equities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	337		280
Fair Value, Inputs, Level 1 [Member] | International Equities [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	35		31
Fair Value, Inputs, Level 1 [Member] | Other [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	43	[3]	45	[3]
Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	1,677		1,834
Fair Value, Inputs, Level 2 [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	48		65
Fair Value, Inputs, Level 2 [Member] | US Equities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	82		95
Fair Value, Inputs, Level 2 [Member] | US Equities [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	5		6
Fair Value, Inputs, Level 2 [Member] | International Equities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	7		7
Fair Value, Inputs, Level 2 [Member] | Corporate Bond Securities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	1,265	[1]	1,319	[1]
Fair Value, Inputs, Level 2 [Member] | Corporate Bond Securities [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	34	[1]	42	[1]
Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	108	[1]	206	[1]
Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	1		4
Fair Value, Inputs, Level 2 [Member] | Other [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	55	[2]	73	[2]
Fair Value, Inputs, Level 2 [Member] | Other [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	2	[3]	3	[3]
Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	7		7
Fair Value, Inputs, Level 3 [Member] | Preferred Securities [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	7		7
Interest-bearing Cash [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	160		134
Interest-bearing Cash [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	6		10
Interest-bearing Cash [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	160		134
Interest-bearing Cash [Member] | Fair Value, Inputs, Level 2 [Member] | OPEB [Member]	'		'
Defined Benefit Plan Disclosure [Line Items]	'		'
Total assets	$6		$10
[1]	Substantially all corporate bonds are rated investment grade by a major ratings agency such as Moodybs.
[2]	Other consists primarily of municipal bonds and fixed income derivative instruments.
[3]	Other consists primarily of diversified bond mutual funds.

Recovered_Sheet8

Pension And Other Postretirement Employee Benefits Plans (Schedule Of Expected Long-Term Rate Of Return On Assets Assumptions) (Details)	12 Months Ended
	Dec. 31, 2013
Pension Plan [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	7.39%	[1]
Pension Plan [Member] | International Equities [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	7.83%
Pension Plan [Member] | US Equities [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	7.20%
Pension Plan [Member] | Real Estate [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	6.20%
Pension Plan [Member] | Credit Securities [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	5.87%
Pension Plan [Member] | Fixed Income [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	5.30%
Pension Plan [Member] | Oncor Retirement Plan [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	4.72%
OPEB [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	7.05%
OPEB [Member] | 401(h) Accounts [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	7.59%
OPEB [Member] | Life Insurance VEBA [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	6.71%
OPEB [Member] | Union VEBA [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	6.71%
OPEB [Member] | Non-union VEBA [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Weighted average expected long-term rate of return	3.80%
[1]	The 2014 expected long-term rate of return for the nonregulated portion of the Oncor Retirement Plan is 4.72%.

Recovered_Sheet9

Pension And Other Postretirement Employee Benefits Plans (Schedule Of Contributions) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Total contributions	$20	$104	$193
Pension Plan [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Total contributions	9	93	175
OPEB [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Total contributions	$11	$11	$18

Recovered_Sheet10

Pension And Other Postretirement Employee Benefits Plans (Schedule Of Estimated Future Benefit Payments) (Details) (USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
Pension Plan [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
2014	$155
2015	159
2016	165
2017	169
2018	175
2019-23	942
OPEB [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
2014	45
2015	49
2016	52
2017	55
2018	57
2019-23	$316

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	1 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Nov. 30, 2012	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Exercise payments	'	$4	$64
Share-based compensation expense	'	2	57
SARs Plan [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Dividend accrual compensation expense	'	'	6
SARs [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
SARs exercise price	$14.54	'	'
Exercise payments	64	'	'
Share-based compensation expense	57	'	'
Aggregate dividends	18	'	'
Recognized dividend accretion and interest	'	2	1
SARs [Member] | Certain Executive Officers [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Deferred dividends	$6	'	'
SARs [Member] | SARs Plan [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
SARs exercised	14,322,219	'	'
SARs [Member] | Director SARs Plan [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
SARs exercised	55,000	'	'

RelatedParty_Transaction_Narra

Related-Party Transaction (Narrative) (Details) (USD $)	12 Months Ended						1 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Feb. 27, 2014	Aug. 31, 2012	Aug. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
				Executory Contracts And Unexpired Leases [Member]	Subsequent Event [Member]	TCEH [Member]	EFH Corp [Member]	EFH Corp [Member]	EFH Corp [Member]	EFH Corp [Member]
Related Party Transaction [Line Items]	'	'	'	'	'	'	'	'	'	'
Revenue from related party	$967	$962	$1,026	'	'	'	'	$2	$2	$1
Trade accounts and other receivables from affiliates (Note 11)	135	53	'	'	6	'	'	'	'	'
Unbilled Receivables related to affiliate	56	48	'	'	'	'	'	'	'	'
Interest income	'	16	32	'	'	'	'	'	'	'
Amounts received under the note receivable	'	20	'	'	'	'	'	'	'	'
Note receivable from related party	'	'	'	'	'	159	'	'	'	'
Amount received from sale of note to related party	'	'	'	'	'	'	159	'	'	'
Increase (decrease) in membership interest	'	'	'	'	'	'	'	'	-2	'
Administrative and services costs	30	32	34	'	'	'	'	'	'	'
Shared facilities expense	4	5	4	'	'	'	'	'	'	'
Delivery fee surcharges	16	16	17	'	'	'	'	'	'	'
Letter of credit	9	11	'	'	'	'	'	'	'	'
Exposure to executory contracts and unexpired leases	'	'	'	$20	'	'	'	'	'	'

RelatedParty_Transactions_Amou

Related-Party Transactions (Amounts Payable To (Receivable From) Members In Lieu Of Income Taxes) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Related Party Transaction [Line Items]	'	'
Federal income taxes	($23)	'
Texas margin taxes	23	22
Total payable (receivable)	'	22
EFH Corp [Member]	'	'
Related Party Transaction [Line Items]	'	'
Federal income taxes	-18	'
Texas margin taxes	23	22
Total payable (receivable)	5	22
Texas Transmission and Investment LLC [Member]	'	'
Related Party Transaction [Line Items]	'	'
Federal income taxes	-5	'
Total payable (receivable)	($5)	'

RelatedParty_Transactions_Cash

Related-Party Transactions (Cash Payments Made To (Received From) Members In Lieu Of Income Taxes) (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2013		Dec. 31, 2012
Related Party Transaction [Line Items]	'	'		'
Federal income taxes	'	$89	[1]	($23)	[1]
Texas margin taxes	'	12	[2]	21	[2]
Total payments (receipts)	'	101		-2
EFH Corp [Member]	'	'		'
Related Party Transaction [Line Items]	'	'		'
Federal income taxes	'	78	[1]	-18	[1]
Texas margin taxes	'	12	[2]	21	[2]
Total payments (receipts)	'	90		3
Income tax payments to members	33	'		'
Income tax refunds from members	10	'		'
Texas Transmission and Investment LLC [Member]	'	'		'
Related Party Transaction [Line Items]	'	'		'
Federal income taxes	'	11	[1]	-5	[1]
Total payments (receipts)	'	$11		($5)
[1]	Includes $33 million payment made to EFH Corp. in 2013 related to the 1997-2002 IRS appeals settlement.
[2]	Includes $10 million refund received from EFH Corp. in 2013 related to 1997-2001 amended Texas franchise tax returns.

Supplementary_Financial_Inform2

Supplementary Financial Information (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue, Major Customer [Line Items]	'	'	'
Face value of life insurance policies	$159	$152	'
Net cash surrender values	71	65	'
Unbilled revenue	180	147	'
Depreciation expense as percentage of average depreciable property	3.70%	3.90%	4.00%
Aggregate amortization expenses	53	53	48
Goodwill	4,064	4,064	'
Sales [Member] | TCEH [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Concentration Risk Percentage	27.00%	29.00%	33.00%
Sales [Member] | Nonaffiliated REP [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Concentration Risk Percentage	15.00%	15.00%	15.00%
Nonaffiliated Trade Accounts Receivable [Member] | Nonaffiliated REP [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Concentration Risk Percentage	12.00%	12.00%	'
Land Easements [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Weighted average remaining useful life	'85 years	'	'
Capitalized Software [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Weighted average remaining useful life	'4 years	'	'
Bondco Exposure [Member]	'	'	'
Revenue, Major Customer [Line Items]	'	'	'
Exposure to Bondco	$16	$16	'

Supplementary_Financial_Inform3

Supplementary Financial Information (Schedule Of Other Income And Deductions) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplementary Financial Information [Abstract]	'	'	'
Accretion of fair value adjustment (discount) to regulatory assets due to purchase accounting	$17	$23	$29
Other	1	3	1
Total other income	18	26	30
Professional fees	3	3	4
SARs exercise (Note 10)	2	57	'
Other	10	4	5
Total other deductions	$15	$64	$9

Supplementary_Financial_Inform4

Supplementary Financial Information (Schedule Of Interest Expense And Related Charges) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplementary Financial Information [Abstract]	'	'	'
Interest expense	$360	$366	$359
Amortization of debt issuance costs and discounts	21	18	3
Allowance for funds used during construction - capitalized interest portion	-10	-10	-3
Total interest expense and related charges	$371	$374	$359

Supplementary_Financial_Inform5

Supplementary Financial Information (Schedule Of Restricted Cash) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Restricted Cash and Cash Equivalents Items [Line Items]	'	'
Total restricted cash - Current Assets	$52	$55
Total restricted cash - Noncurrent Assets	16	16
Customer Collections Related To Transition Bonds Used Only To Service Debt And Pay Expenses[Member]	'	'
Restricted Cash and Cash Equivalents Items [Line Items]	'	'
Total restricted cash - Current Assets	52	55
Reserve For Fees Associated With Transition Bonds [Member]	'	'
Restricted Cash and Cash Equivalents Items [Line Items]	'	'
Total restricted cash - Noncurrent Assets	10	10
Reserve For Shortfalls Of Transition Bond Charges [Member]	'	'
Restricted Cash and Cash Equivalents Items [Line Items]	'	'
Total restricted cash - Noncurrent Assets	$6	$6

Supplementary_Financial_Inform6

Supplementary Financial Information (Schedule Of Trade Accounts Receivable) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Supplementary Financial Information [Abstract]	'	'
Gross trade accounts receivable	$527	$395
Trade accounts receivable from TCEH	-139	-55
Allowance for uncollectible accounts	-3	-2
Trade accounts receivable from nonaffiliates - net	$385	$338

Supplementary_Financial_Inform7

Supplementary Financial Information (Summary of Investment Balance) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Supplementary Financial Information [Abstract]	'	'
Assets related to employee benefit plans, including employee savings programs	$88	$80
Land	3	3
Total investments and other property	$91	$83

Supplementary_Financial_Inform8

Supplementary Financial Information (Schedule Of Property, Plant And Equipment) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property Plant and Equipment [Line Items]	'	'
Total assets in service	$17,056	$16,083
Less accumulated depreciation	5,725	5,407
Net of accumulated depreciation	11,331	10,676
Construction work in progress	556	627
Held for future use	15	15
Property, plant and equipment - net	11,902	11,318
Distribution [Member]	'	'
Property Plant and Equipment [Line Items]	'	'
Total assets in service	10,055	9,745
Composite depreciation rate	4.10%	'
Avg. life	'24 years 7 months 6 days	'
Transmission [Member]	'	'
Property Plant and Equipment [Line Items]	'	'
Total assets in service	6,133	5,482
Composite depreciation rate	2.80%	'
Avg. life	'35 years 9 months 18 days	'
Other Assets [Member]	'	'
Property Plant and Equipment [Line Items]	'	'
Total assets in service	$868	$856
Composite depreciation rate	9.10%	'
Avg. life	'11 years	'

Supplementary_Financial_Inform9

Supplementary Financial Information (Schedule Of Intangible Assets) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$825	$704
Accumulated Amortization	271	299
Net	554	405
Land Easements [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	440	295
Accumulated Amortization	82	79
Net	358	216
Capitalized Software [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	385	409
Accumulated Amortization	189	220
Net	$196	$189

Recovered_Sheet11

Supplementary Financial Information (Schedule Of Estimated Aggregate Amortization Expenses) (Details) (USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
Supplementary Financial Information [Abstract]	'
2014	$55
2015	55
2016	52
2017	44
2018	$40

Recovered_Sheet12

Supplementary Financial Information (Schedule Of Other Noncurrent Liabilities And Deferred Credits) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Supplementary Financial Information [Abstract]	'	'
Retirement plans and other employee benefits	$1,399	$1,495
Uncertain tax positions (including accrued interest)	56	169
Amounts payable to members related to income taxes	17	'
Investment tax credits	20	24
Other	62	58
Total other noncurrent liabilities and deferred credits	$1,554	$1,746

Recovered_Sheet13

Supplementary Financial Information (Schedule Of Supplemental Cash Flow Information) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Supplementary Financial Information [Abstract]	'		'		'
Interest	$361		$378		$360
Capitalized interest	-10		-10		-3
Interest (net of amounts capitalized)	351		368		357
Federal	89		-23		-134
State	12		21		20
Total amount is lieu of income taxes	101		-2		-114
SARs exercise	4		64		'
Noncash construction expenditures	$84	[1]	$103	[1]	$140	[1]
[1]	Represents end-of-period accruals.

Recovered_Sheet14

Supplementary Financial Information (Schedule Of Quarterly Information) (Details) (USD $)	3 Months Ended												12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplementary Financial Information [Abstract]	'	'	'	'	'		'		'		'		'	'	'
Operating revenues	$912	$966	$857	$817	$792		$925		$828		$783		$3,552	$3,328	$3,118
Operating income	190	239	189	180	156		230		188		157		798	731	693
Net income	103	146	96	87	28	[1]	139	[1]	107	[1]	75	[1]	432	349	367
Pre-tax SARs expense	'	'	'	'	'		'		'		'		$2	$57	'
[1]	Fourth quarter 2012 reflects a $57 million pre-tax charge to expense associated with the SARs settlement (see Note 10).