Energy Future Competitive 10-Q 1 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 01, 2013	Nov. 01, 2013
		Common Class A [Member]	Common Class B [Member]
Entity Information [Line Items]	'	'	'
Document Type	'10-Q	'	'
Amendment Flag	'false	'	'
Document Period End Date	30-Sep-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'Q3	'	'
Entity Registrant Name	'Energy Future Competitive Holdings Co LLC	'	'
Entity Central Index Key	'0001445049	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Filer Category	'Non-accelerated Filer	'	'
Entity Common Stock, Shares Outstanding A	'	0	0
Entity Outstanding Membership Interests	'At August 1, 2013, the outstanding membership interest in Energy Future Competitive Holdings Company LLC was directly held by Energy Future Holdings Corp.	'	'

Condensed_Statements_Of_Consol

Condensed Statements Of Consolidated Income (Loss) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]	'	'	'	'
Operating revenues	$1,893	$1,752	$4,572	$4,358
Fuel, purchased power costs and delivery fees	-852	-850	-2,175	-2,153
Net gain (loss) from commodity hedging and trading activities	58	-3	29	229
Operating costs	-189	-201	-685	-636
Depreciation and amortization	-331	-328	-1,012	-992
Selling, general and administrative expenses	-175	-174	-502	-484
Franchise and revenue-based taxes	-18	-19	-51	-55
Other income (Note 12)	1	2	7	12
Other deductions (Note 12)	-8	-30	-12	-37
Interest income	1	10	5	36
Interest expense and related charges (Note 12)	-340	-772	-1,338	-2,268
Income (loss) before income taxes	40	-613	-1,162	-1,990
Income tax benefit	17	228	476	692
Net income (loss)	$57	($385)	($686)	($1,298)

Condensed_Statements_Of_Consol1

Condensed Statements Of Consolidated Comprehensive Income (Loss) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]	'	'	'	'
Net income (loss)	$57	($385)	($686)	($1,298)
Other comprehensive income, net of tax effects b cash flow hedges derivative value net loss related to hedged transactions recognized during the period and reported in interest expense and related charges (net of tax benefit of $1, $1, $3 and $3)	1	1	5	5
Comprehensive income (loss)	$58	($384)	($681)	($1,293)

Condensed_Statements_Of_Consol2

Condensed Statements Of Consolidated Comprehensive Income (Loss) (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Comprehensive Income [Abstract]	'	'	'	'
Other comprehensive income, net of tax effects b cash flow hedges derivative value net loss related to hedged transactions recognized during the period and reported in interest expense and related charges (net of tax benefit of $1, $1, $3 and $3)	$1	$1	$5	$5

Condensed_Statements_Of_Consol3

Condensed Statements Of Consolidated Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash flows - operating activities:	'	'
Net income (loss)	($686)	($1,298)
Adjustments to reconcile net loss to cash provided by (used in) operating activities:	'	'
Depreciation and amortization	1,142	1,137
Deferred income tax benefit, net	-401	-716
Income tax benefit due to audit resolutions (Note 12)	-80	0
Unrealized net loss from mark-to-market valuations of commodity positions	693	1,290
Unrealized net (gain) loss from mark-to-market valuations of interest rate swaps (Note 5)	-899	16
Interest expense on toggle notes payable in additional principal (Notes 5 and 12)	0	136
Amortization of debt related costs, discounts, fair value discounts and losses on dedesignated cash flow hedges (Note 12)	209	152
Interest expense related to pushed-down debt of parent (Notes 5 and 12)	5	57
Other asset impairments	3	24
Bad debt expense (Note 4)	23	20
Accretion expense related primarily to mining reclamation obligations (Note 12)	24	27
Stock-based incentive compensation expense	1	5
Other, net	2	10
Changes in operating assets and liabilities:	'	'
Margin deposits, net	-197	-321
Other operating assets and liabilities	40	-210
Cash provided by (used in) operating activities	-121	329
Cash flows b financing activities:	'	'
Repayments/repurchases of long-term debt (Note 5)	-94	-30
Net short-term borrowings under accounts receivable securitization program (Note 4)	90	80
Decrease in other short-term borrowings (Note 5)	0	-385
Notes/advances due to affiliates	4	0
Decrease in income tax-related note payable to Oncor (Note 11)	0	-20
Settlement of reimbursement agreements with Oncor (Note 11)	0	-159
Contributions from noncontrolling interests (Note 7)	3	6
Sale/leaseback of equipment	0	15
Other, net	-10	0
Cash used in financing activities	-7	-493
Cash flows b investing activities:	'	'
Capital expenditures	-353	-498
Nuclear fuel purchases	-59	-155
Settlements of notes due from affiliates	698	922
Purchase of right to use certain computer-related assets from parent (Note 11)	-6	0
Proceeds from sales of assets	3	1
Acquisition of combustion turbine trust interest (Note 5)	-40	0
Changes in restricted cash	0	112
Purchases of environmental allowances and credits	-13	-19
Proceeds from sales of nuclear decommissioning trust fund securities	128	56
Investments in nuclear decommissioning trust fund securities	-140	-68
Other, net	-3	2
Cash provided by (used in) investing activities	215	353
Net change in cash and cash equivalents	87	189
Cash and cash equivalents b beginning balance	1,175	120
Cash and cash equivalents b ending balance	$1,262	$309

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$1,262	$1,175
Trade accounts receivable b net (includes $573 and $445 in pledged amounts related to a VIE (Notes 2 and 4))	796	710
Notes receivable from parent (Note 11)	0	698
Income taxes receivable from parent	7	0
Inventories (Note 12)	400	393
Commodity and other derivative contractual assets (Note 9)	973	1,463
Margin deposits related to commodity positions	21	71
Other current assets	34	120
Total current assets	3,493	4,630
Restricted cash (Note 12)	947	947
Investments (Note 12)	787	710
Property, plant and equipment b net (Note 12)	17,961	18,556
Goodwill (Note 3)	4,952	4,952
Identifiable intangible assets b net (Note 3)	1,736	1,781
Commodity and other derivative contractual assets (Note 9)	159	586
Other noncurrent assets, primarily unamortized debt amendment and issuance costs	859	811
Total assets	30,894	32,973
Current liabilities:	'	'
Short-term borrowings (includes $172 and $82 related to a VIE (Notes 2 and 5))	2,226	2,136
Long-term debt due currently (Note 5)	32	96
Trade accounts payable	354	389
Trade accounts and other payables to affiliates	205	139
Notes payable to parent (Note 11)	92	81
Commodity and other derivative contractual liabilities (Note 9)	594	894
Margin deposits related to commodity positions	353	600
Accumulated deferred income taxes	36	49
Accrued income taxes payable to parent (Note 11)	0	31
Accrued taxes other than income	95	17
Accrued interest	532	407
Other current liabilities	219	255
Total current liabilities	4,738	5,094
Accumulated deferred income taxes	3,347	3,759
Commodity and other derivative contractual liabilities (Note 9)	782	1,556
Notes or other liabilities due to affiliates	2	5
Long-term debt held by affiliates (Note 11)	382	382
Long-term debt, less amounts due currently (Note 5)	29,770	29,928
Affiliate tax sharing liability (Note 12)	723	0
Other noncurrent liabilities and deferred credits (Note 12)	1,793	2,643
Total liabilities	41,537	43,367
Commitments and Contingencies (Note 6)	'	'
Membership interests/equity (Note 7):	'	'
EFCH shareholder's equity	0	-10,506
EFCH membership interests	-10,748	0
Noncontrolling interests in subsidiaries	105	112
Total membership interests/equity	-10,643	-10,394
Total liabilities and membership interests/equity	$30,894	$32,973

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2011
In Millions, unless otherwise specified
Trade accounts receivable, pledged amounts related to VIE	$573	$445
Short-term borrowings related to a VIE	$172	$82

Business_And_Significant_Accou

Business And Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Business And Significant Accounting Policies	'
	BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES
	Description of Business
	References in this report to "we," "our," "us" and "the company" are to EFCH and/or its subsidiaries, as apparent in the context. See "Glossary" for defined terms.
	EFCH, a wholly owned subsidiary of EFH Corp., is a Dallas, Texas-based holding company. In April 2013, EFCH was converted from a Texas corporation to a Delaware limited liability company. The conversion did not result in a change in the management, assets, businesses or operations of EFCH. We conduct our operations almost entirely through our wholly owned subsidiary, TCEH. TCEH is a holding company for subsidiaries engaged in competitive electricity market activities largely in Texas, including electricity generation, wholesale energy sales and purchases, commodity risk management and trading activities and retail electricity sales. Key management activities, including commodity risk management and electricity sourcing for our retail and wholesale customers, are performed on an integrated basis; consequently, there are no reportable business segments.
	TCEH operates largely in the ERCOT market, and wholesale electricity prices in that market have generally moved with the price of natural gas. Wholesale electricity prices have significant implications to TCEH's profitability and cash flows and, accordingly, the value of its business.
	Liquidity Considerations
	EFCH has been and is expected to continue to be adversely affected by the sustained decline in natural gas prices and its effect on wholesale and retail electricity prices in ERCOT. Further, the remaining natural gas hedges that TCEH entered into when forward market prices of natural gas were significantly higher than current prices will mature in 2013 and 2014. These market conditions challenge the long-term profitability and operating cash flows of EFCH's and its subsidiaries' business and the ability to support their significant interest payments and debt maturities, and could adversely impact their ability to obtain additional liquidity and service, refinance and/or extend the maturities of their outstanding debt.
	Note 5 provides the details of debt activity in 2013 and the principal amounts and maturity dates of EFCH's and its consolidated subsidiaries' short-term borrowings and long-term debt, which includes the maturity of $3.8 billion of the TCEH Term Loan Facilities in October 2014. At September 30, 2013, TCEH has $1.3 billion of cash and cash equivalents and $171 million of available capacity under its letter of credit facility. Based on forward wholesale power prices in ERCOT, which are subject to the effects of changing market conditions, TCEH may not have sufficient liquidity, absent any financing transactions, to meet its obligations within the next twelve months.
	EFH Corp. Discussions with Creditors
	EFH Corp. and its subsidiaries, other than Oncor Holdings and its subsidiaries (the Oncor Ring-Fenced Entities) continue to consider and evaluate possible transactions and initiatives to address their highly leveraged balance sheets and significant cash interest requirements and have entered into discussions with their lenders and bondholders with respect to such transactions and initiatives. These transactions and initiatives may include, among others, debt for debt exchanges, recapitalizations, amendments to and extensions of debt obligations and exchanges or conversions of debt for preferred or common equity or warrants, including exchanges or conversions of debt of EFH Corp., EFIH, EFCH and TCEH into preferred or common equity or warrants of EFH Corp., EFIH, EFCH, TCEH and/or any of their subsidiaries. These actions could result in holders of EFH Corp., EFIH, EFCH and TCEH debt instruments not recovering the full principal amount of those obligations.
	In March and April 2013, EFH Corp. engaged in discussions with certain unaffiliated holders of first lien senior secured claims against EFCH, TCEH and certain of TCEH's subsidiaries (the TCEH Creditors) with respect to proposed changes to its capital structure. No agreement was reached as part of those discussions, and in September and October 2013, EFH Corp. engaged in further discussions with the TCEH Creditors, certain unaffiliated holders of unsecured claims against EFIH and a significant creditor with claims against TCEH, EFCH, EFIH and EFH Corp. (collectively, the Creditors) with respect to its capital structure, including the possibility of a consensual, prepackaged restructuring transaction. EFH Corp.'s objectives in these discussions were to promote a sustainable capital structure and maximize enterprise value of EFH Corp. and its subsidiaries by, among other things, encouraging agreement on a restructuring plan that would minimize time spent in a restructuring through a proactive and organized solution; minimizing any potential adverse tax impacts of a restructuring; maintaining EFH Corp. in one consolidated group; maintaining focus on operating its businesses, and maintaining EFH Corp.'s high-performing work force.
	EFH Corp. and the Creditors discussed a number of proposed changes to EFH Corp.'s capital structure. Certain proposals contemplated that some combination of EFH Corp. and certain of its subsidiaries (including EFIH, EFCH and TCEH but excluding the Oncor Ring-Fenced Entities) would implement a plan of reorganization by commencing one or more voluntary cases under Chapter 11 of the United States Bankruptcy Code (the Code). Such proposals would have resulted in a prenegotiated restructuring of EFCH’s approximately $32.2 billion principal amount of debt, EFH Corp.’s approximately $650 million principal amount of debt and EFIH’s approximately $7.6 billion principal amount of debt (each as of September 30, 2013 and excluding debt held by affiliates) and contemplated that after the restructuring EFH Corp. would continue to hold all of the equity interests in EFCH and EFIH; EFCH would continue to hold all of the equity interests in TCEH; and EFIH would continue to hold all of the equity interests in Oncor Holdings. Another proposal contemplated that EFIH (excluding Oncor Holdings and its subsidiaries) would implement a plan of reorganization by commencing a stand-alone voluntary case under the Code. Such proposal contemplated that after the restructuring certain creditors of EFIH would own a substantial majority of, and certain creditors of EFH Corp. and the equity holders of EFH Corp. would collectively own a minority of, the equity interests in EFIH. The confirmation of any plans of reorganization in such cases would be subject to applicable regulatory approvals. EFH Corp. and the Creditors have not reached agreement on the terms of any change in our capital structure.
	EFH Corp. is not currently engaged in ongoing negotiations with the principals of any of the Creditors. Although the Creditors are not currently engaged in ongoing negotiations with EFH Corp., certain of the Creditors have directed their advisors to continue to work with EFH Corp. and its advisors to explore further whether the parties can reach an agreement on the terms of a consensual restructuring. EFH Corp. will continue to consider and evaluate a range of future changes to its capital structure, in addition to the proposed changes described above, which may include filing a voluntary case under Chapter 11 of the Code for some or all of EFH Corp. and its subsidiaries (excluding the Oncor Ring-Fenced Entities).
	Basis of Presentation
	The condensed consolidated financial statements have been prepared in accordance with US GAAP and on the same basis as the audited financial statements included in our 2012 Form 10-K. Adjustments (consisting of normal recurring accruals) necessary for a fair presentation of the results of operations and financial position have been included therein. All intercompany items and transactions have been eliminated in consolidation. Any acquisitions of outstanding debt for cash, including notes that had been issued in lieu of cash interest, are presented in the financing activities section of the statement of cash flows. Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with US GAAP have been omitted pursuant to the rules and regulations of the SEC. Because the condensed consolidated interim financial statements do not include all of the information and footnotes required by US GAAP, they should be read in conjunction with the audited financial statements and related notes included in our 2012 Form 10-K. The results of operations for an interim period may not give a true indication of results for a full year. All dollar amounts in the financial statements and tables in the notes are stated in millions of US dollars unless otherwise indicated.
	Use of Estimates
	Preparation of financial statements requires 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.

Consolidation_Of_Variable_Inte

Consolidation Of Variable Interest Entities	9 Months Ended
	Sep. 30, 2013
Consolidation Of Variable Interest Entities [Abstract]	'
Consolidation Of Variable Interest Entities	'
	VARIABLE INTEREST ENTITIES
	A variable interest entity (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. Accounting standards require consolidation of 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). In determining the appropriateness of consolidation of a VIE, we evaluate its purpose, governance structure, decision making processes and risks that are passed on to its interest holders. We also examine the nature of any related party relationships among the interest holders of the VIE and the nature of any special rights granted to the interest holders of the VIE. There are no material investments accounted for under the equity or cost method.
	As discussed below, our balance sheet includes assets and liabilities of VIEs that meet the consolidation standards. The maximum exposure to loss from our interests in VIEs does not exceed our carrying value.
	Consolidated VIEs
	See discussion in Note 4 regarding the VIE related to our accounts receivable securitization program that is consolidated under the accounting standards. We also consolidate Comanche Peak Nuclear Power Company LLC (CPNPC), which was formed by subsidiaries of TCEH and Mitsubishi Heavy Industries Ltd. (MHI) for the purpose of developing two new nuclear generation units at our existing Comanche Peak nuclear-fueled generation facility using MHI's US-Advanced Pressurized Water Reactor technology and to obtain a combined operating license from the NRC. CPNPC is currently financed through capital contributions from the subsidiaries of TCEH and MHI that hold 88% and 12% of CPNPC's equity interests, respectively (see Note 7).
	The carrying amounts and classifications of the assets and liabilities related to our consolidated VIEs are as follows:
	Assets:	September 30,		31-Dec-12		Liabilities:	September 30,		31-Dec-12
		2013					2013
	Cash and cash equivalents	$	37	$	43	Short-term borrowings	$	172	$	82
	Accounts receivable	573		445		Trade accounts payable	1		1
	Property, plant and equipment	138		134		Other current liabilities	13		7
	Other assets, including $3 million and $12 million of current assets	12		16
	Total assets	$	760	$	638	Total liabilities	$	186	$	90
	The assets of our consolidated VIEs can only be used to settle the obligations of the VIE, and the creditors of our consolidated VIEs do not have recourse to our assets to settle the obligations of the VIE.

Goodwill_And_Identifiable_Inta

Goodwill And Identifiable Intangible Assets	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill And Identifiable Intangible Assets	'
	GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS
	Goodwill
	The following table provides information regarding our goodwill balance, which arose in connection with accounting for the Merger. There were no changes to the goodwill balance for the three and nine months ended September 30, 2013. None of the goodwill is being deducted for tax purposes.
	Goodwill before impairment charges	$	18,322
	Accumulated impairment charges	(13,370		)
	Balance at September 30, 2013 and December 31, 2012	$	4,952
	In the first quarter 2013, we finalized the fair value calculations supporting the $1.2 billion noncash goodwill impairment charge that was recorded in the fourth quarter 2012. No additional impairment was recorded.
	We have determined that in consideration of our most recent forecasts of wholesale power prices in ERCOT, the likelihood of a goodwill impairment has increased. We have initiated an evaluation of goodwill as of September 30, 2013, which will be completed in the fourth quarter 2013 and could result in a noncash goodwill impairment charge in that period.
	Identifiable Intangible Assets
	Identifiable intangible assets, including amounts that arose in connection with accounting for the Merger, are comprised of the following:
			30-Sep-13												31-Dec-12
	Identifiable Intangible Asset		Gross Carrying Amount				Accumulated Amortization				Net				Gross Carrying Amount				Accumulated Amortization		Net
	Retail customer relationship		$	463			$	396			$	67			$	463			$	378	$	85
	Favorable purchase and sales contracts		551				333				218				552				314		238
	Software and other computer-related assets		348				145				203				320				112		208
	Environmental allowances and credits		598				407				191				594				393		201
	Mining development costs		196				105				91				163				82		81
	Total identifiable intangible assets subject to amortization		$	2,156			$	1,386			770				$	2,092			$	1,279	813
	Retail trade name (not subject to amortization)										955										955
	Mineral interests (not currently subject to amortization)										11										13
	Total identifiable intangible assets										$	1,736									$	1,781
	Amortization expense related to identifiable intangible assets (including income statement line item) consisted of:
	Identifiable Intangible Asset		Income Statement Line		Three Months Ended September 30,								Nine Months Ended September 30,
					2013				2012				2013				2012
	Retail customer relationship		Depreciation and amortization		$	6			$	8			$	18			$	25
	Favorable purchase and sales contracts		Operating revenues/fuel, purchased power costs and delivery fees		6				5				19				20
	Software and other computer-related assets		Depreciation and amortization		14				9				33				24
	Environmental allowances and credits		Fuel, purchased power costs and delivery fees		5				6				11				15
	Mining development costs		Depreciation and amortization		8				7				23				20
	Total amortization expense				$	39			$	35			$	104			$	104
	Estimated Amortization of Identifiable Intangible Assets — The estimated aggregate amortization expense of identifiable intangible assets for each of the next five fiscal years is as follows:
	Year		Estimated Amortization Expense
	2013		$	143
	2014		$	138
	2015		$	126
	2016		$	101
	2017		$	78

Trade_Accounts_Receivable_And_

Trade Accounts Receivable And Accounts Receivable Securitization Program	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Trade Accounts Receivable And Accounts Receivable Securitization Program	'
	TRADE ACCOUNTS RECEIVABLE AND ACCOUNTS RECEIVABLE SECURITIZATION PROGRAM
	On October 29, 2013, we terminated the Accounts Receivable Securitization Program, described in the following paragraphs, and repaid all outstanding obligations under the program. In connection with the termination of the program, TXU Energy repurchased $491 million in accounts receivable from TXU Energy Receivables Company LLC (TXU Energy Receivables Company) for an aggregate purchase price of $474 million, TXU Energy Receivables Company paid TXU Energy $11 million, constituting repayment in full of its outstanding obligations under its subordinated note with TXU Energy, and TXU Energy Receivables Company repaid all of its borrowings from a financial institution providing the financing for the program totaling $126 million.
	Under the Accounts Receivable Securitization Program, TXU Energy (originator) sold all of its trade accounts receivable to TXU Energy Receivables Company, which was an entity created for the special purpose of purchasing receivables from the originator and is a consolidated, wholly owned, bankruptcy-remote subsidiary of TCEH. TXU Energy Receivables Company borrowed funds from a financial institution using the accounts receivable as collateral.
	The trade accounts receivable amounts under the program are reported in the financial statements as pledged balances, and the related funding amounts are reported as short-term borrowings.
	The maximum funding amount available under the program at September 30, 2013 was $200 million, which approximated the expected usage and applied only to receivables related to non-executory retail sales contracts. Program funding increased to $172 million at September 30, 2013 from $82 million at December 31, 2012. Because TCEH's credit ratings were lower than Ba3/BB-, under the terms of the program available funding was reduced by the amount of customer deposits held by the originator, which totaled $33 million at September 30, 2013.
	TXU Energy Receivables Company issued a subordinated note payable to the originator in an amount equal to the difference between the face amount of the accounts receivable purchased, less a discount, and cash paid to the originator. Because the subordinated note was limited to 25% of the uncollected accounts receivable purchased, and the amount of borrowings was limited by terms of the financing agreement, any additional funding to purchase the receivables was sourced from cash on hand, which totaled $37 million at September 30, 2013, and/or capital contributions from TCEH. Under the program, the subordinated note issued by TXU Energy Receivables Company was subordinated to the security interests of the financial institution. The balance of the subordinated note payable, which was eliminated in consolidation, totaled $93 million and $97 million at September 30, 2013 and December 31, 2012, respectively.
	All new trade receivables under the program generated by the originator were continuously purchased by TXU Energy Receivables Company with the proceeds from collections of receivables previously purchased and, as necessary, increased borrowings or funding sources as described immediately above. Changes in the amount of borrowings by TXU Energy Receivables Company reflected seasonal variations in the level of accounts receivable, changes in collection trends and other factors such as changes in sales prices and volumes.
	The discount from face amount on the purchase of receivables from the originator principally funded program fees paid to the financial institution. The program fees consisted primarily of interest costs on the underlying financing and are reported as interest expense and related charges. The discount also funded a servicing fee, which is reported as SG&A expense, paid by TXU Energy Receivables Company to TXU Energy, which provided recordkeeping services and was the collection agent under the program.
	Program fee amounts were as follows:
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Program fees	$	3		$	2		$	6		$	6
	Program fees as a percentage of average funding (annualized)	5.1		%	4.9		%	5.8		%	6.2		%
	Activities of TXU Energy Receivables Company and its predecessor, TXU Receivables Company, were as follows:
		Nine Months Ended September 30,
		2013			2012
	Cash collections on accounts receivable	$	3,200		$	3,501
	Face amount of new receivables purchased (a)	(3,328		)	(3,571		)
	Discount from face amount of purchased receivables	29			8
	Program fees paid to financial institution	(6		)	(6		)
	Servicing fees paid for recordkeeping and collection services	—			(2		)
	Decrease in subordinated notes payable	(4		)	(10		)
	Increase in cash held	17			—
	Other — net	2			—
	Cash flows provided to originator under the program	$	(90	)	$	(80	)
	_______________
	(a)	Net of allowance for uncollectible accounts.
	Trade Accounts Receivable
		30-Sep-13			31-Dec-12
	Wholesale and retail trade accounts receivable	$	813		$	719
	Allowance for uncollectible accounts	(17		)	(9		)
	Trade accounts receivable — reported in balance sheet, including $573 and $445 in pledged retail receivables	$	796		$	710
	Gross trade accounts receivable at September 30, 2013 and December 31, 2012 included unbilled revenues of $272 million and $260 million, respectively.
	Allowance for Uncollectible Accounts Receivable
		Nine Months Ended September 30,
		2013			2012
	Allowance for uncollectible accounts receivable at beginning of period	$	9		$	27
	Increase for bad debt expense	23			20
	Decrease for account write-offs	(15		)	(32		)
	Allowance for uncollectible accounts receivable at end of period	$	17		$	15

ShortTerm_Borrowings_And_LongT

Short-Term Borrowings And Long-Term Debt	9 Months Ended
	Sep. 30, 2013
Debt and Capital Lease Obligations [Abstract]	'
Short-Term Borrowings And Long-Term Debt	'
	SHORT-TERM BORROWINGS AND LONG-TERM DEBT
	Short-Term Borrowings
	At September 30, 2013, outstanding short-term borrowings totaled $2.226 billion, which included $2.054 billion under the TCEH Revolving Credit Facility at a weighted average interest rate of 4.68%, excluding customary fees, and $172 million under the accounts receivable securitization program. On October 29, 2013, we terminated the accounts receivable securitization program and repaid all outstanding obligations under the program (see Note 4).
	At December 31, 2012, outstanding short-term borrowings totaled $2.136 billion, which included $2.054 billion under the TCEH Revolving Credit Facility at a weighted average interest rate of 4.40%, excluding customary fees, and $82 million under the accounts receivable securitization program.
	Credit Facilities
	Credit facilities and related cash borrowings at September 30, 2013 are presented below. Available letter of credit capacity totaled $171 million at September 30, 2013 as discussed below. The facilities are all senior secured facilities of TCEH.
				30-Sep-13
	Facility	Maturity Date		Facility Limit				Letters of Credit				Cash Borrowings				Availability
	TCEH Revolving Credit Facility (a)	Oct-16		$	2,054			$	—			$	2,054			$	—
	TCEH Letter of Credit Facility (b)	October 2017 (b)		1,062				—				1,062				—
	Total TCEH			$	3,116			$	—			$	3,116			$	—
	___________
	(a)	Facility used for borrowings for general corporate purposes. Borrowings are classified as short-term borrowings. At September 30, 2013, borrowings under the facility bear interest at LIBOR plus 4.50%, and a commitment fee is payable quarterly in arrears at a rate per annum equal to 1.00% of the average daily unused portion of the facility. In January 2013, commitments previously maturing in 2013 were extended to 2016 as discussed below.
	(b)	Facility, $42 million of which matures in October 2014, used for issuing letters of credit for general corporate purposes, including, but not limited to, providing collateral support under hedging arrangements and other commodity transactions that are not secured by a first-lien interest in the assets of TCEH. The borrowings under this facility have been recorded by TCEH as restricted cash that supports issuances of letters of credit and are classified as long-term debt. At September 30, 2013, the restricted cash totaled $947 million, after reduction for a $115 million letter of credit drawn in 2009 related to an office building financing. At September 30, 2013, the restricted cash supports $776 million in letters of credit outstanding, leaving $171 million in available letter of credit capacity.
	Amendment and Extension of TCEH Revolving Credit Facility — In January 2013, the Credit Agreement governing the TCEH Senior Secured Facilities was amended to extend the maturity date of the $645 million of commitments maturing in October 2013 to October 2016, bringing the maturity date of all commitments under the TCEH Revolving Credit Facility totaling $2.054 billion to October 2016. The extended commitments have the same terms and conditions as the existing commitments expiring in October 2016 under the Credit Agreement. Fees in consideration for the extension were settled through the incurrence of $340 million principal amount of incremental term loans under the TCEH Term Loan Facilities maturing in October 2017. In connection with the extension request, TCEH eliminated its ability to draw letters of credit under the TCEH Revolving Credit Facility. At the date of the extension, there were no outstanding letters of credit under the TCEH Revolving Credit Facility.
	Long-Term Debt
	At September 30, 2013 and December 31, 2012, long-term debt consisted of the following:
		30-Sep-13				31-Dec-12
	TCEH
	Senior Secured Facilities:
	3.710% TCEH Term Loan Facilities maturing October 10, 2014 (a)(b)	$	3,809			$	3,809
	3.679% TCEH Letter of Credit Facility maturing October 10, 2014 (b)	42				42
	4.709% TCEH Term Loan Facilities maturing October 10, 2017 (a)(b)(c)	15,710				15,370
	4.679% TCEH Letter of Credit Facility maturing October 10, 2017 (b)	1,020				1,020
	11.5% Fixed Senior Secured Notes due October 1, 2020	1,750				1,750
	15% Fixed Senior Secured Second Lien Notes due April 1, 2021	336				336
	15% Fixed Senior Secured Second Lien Notes due April 1, 2021, Series B	1,235				1,235
	10.25% Fixed Senior Notes due November 1, 2015 (c)	2,046				2,046
	10.25% Fixed Senior Notes due November 1, 2015, Series B (c)	1,442				1,442
	10.50 / 11.25% Senior Toggle Notes due November 1, 2016	1,749				1,749
	Pollution Control Revenue Bonds:
	Brazos River Authority:
	5.40% Fixed Series 1994A due May 1, 2029	39				39
	7.70% Fixed Series 1999A due April 1, 2033	111				111
	6.75% Fixed Series 1999B due September 1, 2034, remarketing date April 1, 2013 (d)	—				16
	7.70% Fixed Series 1999C due March 1, 2032	50				50
	8.25% Fixed Series 2001A due October 1, 2030	71				71
	8.25% Fixed Series 2001D-1 due May 1, 2033	171				171
	0.089% Floating Series 2001D-2 due May 1, 2033 (e)	97				97
	0.210% Floating Taxable Series 2001I due December 1, 2036 (f)	62				62
	0.089% Floating Series 2002A due May 1, 2037 (e)	45				45
	6.75% Fixed Series 2003A due April 1, 2038, remarketing date April 1, 2013 (d)	—				44
	6.30% Fixed Series 2003B due July 1, 2032	39				39
	6.75% Fixed Series 2003C due October 1, 2038	52				52
	5.40% Fixed Series 2003D due October 1, 2029, remarketing date October 1, 2014 (d)	31				31
	5.00% Fixed Series 2006 due March 1, 2041	100				100
	Sabine River Authority of Texas:
	6.45% Fixed Series 2000A due June 1, 2021	51				51
	5.20% Fixed Series 2001C due May 1, 2028	70				70
	5.80% Fixed Series 2003A due July 1, 2022	12				12
	6.15% Fixed Series 2003B due August 1, 2022	45				45
	Trinity River Authority of Texas:
	6.25% Fixed Series 2000A due May 1, 2028	14				14
	Unamortized fair value discount related to pollution control revenue bonds (g)	(107		)		(112		)
	Other:
	7.48% Fixed Secured Facility Bonds with amortizing payments through January 2017	36				—
	7.46% Fixed Secured Facility Bonds with amortizing payments through January 2015	4				12
	7% Fixed Senior Notes due March 15, 2013	—				5
	Capital leases	56				64
	Other	3				3
	Unamortized discount	(110		)		(10		)
	Unamortized fair value discount (g)	—				(1		)
	Total TCEH	30,081				29,880
	30-Sep-13				31-Dec-12
EFCH (parent entity)
9.58% Fixed Notes due in annual installments through December 4, 2019 (h)	$	35			$	35
8.254% Fixed Notes due in quarterly installments through December 31, 2021 (h)	35				39
1.065% Floating Rate Junior Subordinated Debentures, Series D due January 30, 2037 (b)	1				1
8.175% Fixed Junior Subordinated Debentures, Series E due January 30, 2037	8				8
Unamortized fair value discount (g)	(6		)		(7		)
Subtotal	73				76
EFH Corp. debt pushed down (i)
10% Fixed Senior Notes due January 15, 2020	—				330
9.75% Fixed Senior Notes due October 15, 2019	—				58
10.875% Fixed Senior Notes due November 1, 2017	16				32
11.25 / 12.00% Senior Toggle Notes due November 1, 2017	14				30
Subtotal — EFH Corp. debt pushed down	30				450
Total EFCH (parent entity)	103				526
Total EFCH consolidated	30,184				30,406
Less amount due currently	(32		)		(96		)
Less amount held by affiliates (Note 11)	(382		)		(382		)
Total long-term debt	$	29,770			$	29,928
____________
(a)	Interest rate swapped to fixed on $18.140 billion principal amount of maturities through October 2014 and up to an aggregate $12.6 billion principal amount from October 2014 through October 2017.
(b)	Interest rates in effect at September 30, 2013.
(c)	As discussed below and in Note 11, principal amounts of notes/term loans totaling $382 million at both September 30, 2013 and December 31, 2012 were held by EFH Corp. and EFIH.
(d)	These series are in the multiannual interest rate mode and are subject to mandatory tender prior to maturity on the mandatory remarketing date. On such date, the interest rate and interest rate period will be reset for the bonds.
(e)	Interest rates in effect at September 30, 2013. These series are in a daily interest rate mode and are classified as long-term as they are supported by long-term irrevocable letters of credit.
(f)	Interest rate in effect at September 30, 2013. This series is in a weekly interest rate mode and is classified as long-term as it is supported by long-term irrevocable letters of credit.
(g)	Amount represents unamortized fair value adjustments recorded under purchase accounting.
(h)	EFCH's obligations with respect to these financings are guaranteed by EFH Corp. and secured on a first-priority basis by, among other things, an undivided interest in the Comanche Peak nuclear generation facility.
(i)	Represents 50% of the amount of these EFH Corp. securities guaranteed by, and pushed down to (pushed-down debt), EFCH (parent entity) per the discussion below under "Guarantees and Push Down of EFH Corp. Debt."
Debt Amounts Due Currently
Amounts due currently (within twelve months) at September 30, 2013 total $32 million and consist of scheduled installment payments on capital leases and debt securities.
Debt Related Activity in 2013
Principal amounts of long-term debt issued in the nine months ended September 30, 2013 consisted of $340 million principal amount of incremental term loans under the TCEH Term Loan Facilities discussed in "Amendment and Extension of TCEH Revolving Credit Facility" above.
Repayments of long-term debt in the nine months ended September 30, 2013 totaled $94 million and consisted of $86 million of payments of principal at scheduled maturity or mandatory tender and remarketing dates (including $60 million of pollution control revenue bond and $17 million of fixed secured facility bond payments) and $8 million of contractual payments under capital leases.
In April 2013, TCEH acquired for $40 million in cash the owner participant interest in a trust established to lease six natural gas-fueled combustion turbines to TCEH. The interest in the trust was held by an unaffiliated party. The trust was consolidated in the second quarter 2013. No gain or loss was recognized on the transaction. The estimated fair value of the combustion turbine assets of $83 million approximated the total of the estimated fair value of the debt assumed and cash paid. In recording the combustion turbine assets, the fair value was reduced by the remaining deferred lease liability and the unamortized lease valuation reserve established in accounting for the Merger, which were reversed and totaled $18 million. At June 30, 2013, the principal amount of the trust's debt totaled $45 million and is payable in semiannual installments through January 1, 2017.
EFIH Debt Exchanges and Distributions Involving EFH Corp. Debt Guaranteed by EFCH (see discussion of debt guarantee below) — In exchanges in January 2013, EFIH and EFIH Finance issued $1.302 billion principal amount of EFIH 10% Senior Secured Notes due 2020 (EFIH 10% Notes) in exchange for $1.310 billion total principal amount of EFH Corp. and EFIH senior secured notes consisting of: (i) $113 million principal amount of EFH Corp. 9.75% Senior Secured Notes due 2019 (EFH Corp. 9.75% Notes), (ii) $1.058 billion principal amount of EFH Corp. 10% Senior Secured Notes due 2020 (EFH Corp. 10% Notes), and (iii) $139 million principal amount of EFIH senior secured notes.
In connection with these debt exchange transactions, EFH Corp. received the requisite consents from holders of the EFH Corp. 9.75% Notes and EFH Corp. 10% Notes to certain amendments to the respective indentures governing these notes. These amendments, among other things, made EFCH and EFIH unrestricted subsidiaries under the EFH Corp. 9.75% Notes and EFH Corp. 10% Notes, thereby eliminating EFCH's and EFIH's guarantees of the notes.
In additional exchanges in January 2013, EFIH and EFIH Finance issued $89 million principal amount of 11.25/12.25% Toggle Notes due 2018 (EFIH Toggle Notes) in exchange for $95 million total principal amount of EFH Corp. senior notes consisting of: (i) $31 million principal amount of EFH Corp. 10.875% Senior Notes due 2017 (EFH Corp. 10.875% Notes), (ii) $33 million principal amount of EFH Corp. 11.25%/12.00% Senior Toggle Notes due 2017 (EFH Corp. Toggle Notes) and (iii) $31 million principal amount of other EFH Corp. unsecured debt.
EFIH received a total of $1.266 billion principal amount of EFH Corp. debt in these exchanges.
In the first quarter 2013, EFIH distributed $6.360 billion principal amount of EFH Corp. debt guaranteed by EFCH that EFIH previously received in debt exchanges, including $1.235 billion (of the $1.266 billion) received in January 2013, as a dividend to EFH Corp., which cancelled the notes. The dividend included $1.715 billion principal amount of EFH Corp. 10.875% Notes, $3.474 billion principal amount of EFH Corp. Toggle Notes, $1.058 billion principal amount of EFH Corp. 10% Notes and $113 million principal amount of EFH Corp. 9.75% Notes.
Guarantee and Push Down of EFH Corp. Debt
Merger-related debt of EFH Corp. and its subsidiaries consists of debt issued or existing at the time of the Merger. Debt issued in exchange for Merger-related debt is considered Merger-related. Debt issuances for cash are considered Merger-related debt to the extent the proceeds are used to repurchase Merger-related debt. EFCH and EFIH (excluding their subsidiaries) fully and unconditionally guarantee on a joint and several basis the Merger-related debt of EFH Corp. (parent). Such debt is subject to push down in accordance with SEC Staff Accounting Bulletin Topic 5-J, and as a result, a portion of such debt and related interest expense is reflected in our financial statements. Merger-related debt of EFH Corp. held by its subsidiaries is not subject to push down.
As a result of transactions in the first quarter 2013 discussed above, debt guaranteed and subject to push down at September 30, 2013 totals $60 million and consists of $33 million principal amount of EFH Corp. 10.875% Senior Notes and $27 million principal amount of EFH Corp. 11.25%/12.00% Senior Toggle Notes. The amount reflected in our balance sheet as pushed down debt ($30 million and $450 million at September 30, 2013 and December 31, 2012, respectively, as shown in the long-term debt table above) represents 50% of the principal amount of the EFH Corp. Merger-related debt guaranteed. This percentage reflects the fact that at the time of the Merger, the equity investments of EFCH and EFIH in their respective operating subsidiaries were essentially equal amounts. Because payment of principal and interest on the debt is the responsibility of EFH Corp., we record the settlement of such amounts as noncash capital contributions from EFH Corp.
The following table presents an analysis of the total outstanding principal amount of EFH Corp. debt guaranteed by EFCH and EFIH at December 31, 2012 and September 30, 2013, respectively.
		31-Dec-12
Securities Guaranteed (principal amounts)		Held by EFIH				Subject to Push Down				Not Merger-Related				Total Guaranteed			Debt Cancelled in 2013		Total Guaranteed September 30, 2013 (c)
EFH Corp. 9.75% Senior Notes (a)		$	—			$	115			$	—			$	115		113		$	—
EFH Corp. 10% Senior Notes (a)		—				661				400				1,061			1,058		—
EFH Corp. 10.875% Senior Notes		1,685				64				—				1,749			1,715		33
EFH Corp. 11.25/12.00% Senior Toggle Notes		3,441				60				—				3,501			3,474		27
Subtotal		$	5,126			$	900			$	400			6,426			$	6,360	60
TCEH Demand Notes (b)														698					—
Total														$	7,124				$	60
____________
(a)	As a result of transactions completed in the first quarter 2013, as discussed above, the guarantees of the EFH Corp. 9.75% Notes and EFH Corp. 10% Notes were eliminated.
(b)	The TCEH Demand Notes were settled in January 2013. See Note 11.
(c)	These amounts are subject to push down.
Information Regarding Other Significant Outstanding Debt
TCEH Senior Secured Facilities — Borrowings under the TCEH Senior Secured Facilities totaled $22.635 billion at September 30, 2013 and consisted of:
•	$3.809 billion of TCEH Term Loan Facilities maturing in October 2014 with interest payable at LIBOR plus 3.50%;
•	$15.710 billion of TCEH Term Loan Facilities maturing in October 2017 with interest payable at LIBOR plus 4.50%;
•	$42 million of cash borrowed under the TCEH Letter of Credit Facility maturing in October 2014 with interest payable at LIBOR plus 3.50% (see discussion under "Credit Facilities" above);
•	$1.020 billion of cash borrowed under the TCEH Letter of Credit Facility maturing in October 2017 with interest payable at LIBOR plus 4.50% (see discussion under "Credit Facilities" above), and
•	Amounts borrowed under the TCEH Revolving Credit Facility, which may be reborrowed from time to time until October 2016 and represent the entire amount of commitments under the facility totaling $2.054 billion at September 30, 2013. See "Credit Facilities" above for discussion regarding the maturity date extension of $645 million in commitments from 2013 to 2016.
Each of the loans described above that matures in 2016 or 2017 includes a "springing maturity" provision pursuant to which (i) in the event that more than $500 million aggregate principal amount of the TCEH 10.25% Notes due in 2015 (other than notes held by EFH Corp. or its controlled affiliates at March 31, 2011 to the extent held at the determination date as defined in the Credit Agreement) or more than $150 million aggregate principal amount of the TCEH Toggle Notes due in 2016 (other than notes held by EFH Corp. or its controlled affiliates at March 31, 2011 to the extent held at the determination date as defined in the Credit Agreement), as applicable, remain outstanding as of 91 days prior to the maturity date of the applicable notes and (ii) TCEH's total debt to Adjusted EBITDA ratio (as defined in the TCEH Senior Secured Facilities) is greater than 6.00 to 1.00 at the applicable determination date, then the maturity date of the extended loans will automatically change to 90 days prior to the maturity date of the applicable notes.
Under the terms of the TCEH Senior Secured Facilities, the commitments of the lenders to make loans to TCEH are several and not joint. Accordingly, if any lender fails to make loans to TCEH, TCEH's available liquidity could be reduced by an amount up to the aggregate amount of such lender's commitments under the TCEH Senior Secured Facilities.
The TCEH Senior Secured Facilities are fully and unconditionally guaranteed jointly and severally on a senior secured basis by EFCH, and subject to certain exceptions, each existing and future direct or indirect wholly owned US subsidiary of TCEH. The TCEH Senior Secured Facilities, along with the TCEH Senior Secured Notes and certain commodity hedging transactions and the interest rate swaps described under "TCEH Interest Rate Swap Transactions" below, are secured on a first-priority basis by (i) substantially all of the current and future assets of TCEH and TCEH's subsidiaries who are guarantors of such facilities and (ii) pledges of the capital stock of TCEH and certain current and future direct or indirect subsidiaries of TCEH.
TCEH 11.5% Senior Secured Notes — At September 30, 2013, the principal amount of the TCEH 11.5% Senior Secured Notes totaled $1.750 billion. The notes mature in October 2020, with interest payable in cash quarterly in arrears on January 1, April 1, July 1 and October 1, at a fixed rate of 11.5% per annum. The notes are fully and unconditionally guaranteed on a joint and several basis by EFCH and each subsidiary of TCEH that guarantees the TCEH Senior Secured Facilities (collectively, the Guarantors). The notes are secured, on a first-priority basis, by security interests in all of the assets of TCEH, and the guarantees are secured on a first-priority basis by all of the assets and equity interests held by the Guarantors, in each case, to the extent such assets and equity interests secure obligations under the TCEH Senior Secured Facilities (the TCEH Collateral), subject to certain exceptions and permitted liens.
The notes are (i) senior obligations and rank equally in right of payment with all senior indebtedness of TCEH, (ii) senior in right of payment to all existing or future unsecured and second-priority secured debt of TCEH to the extent of the value of the TCEH Collateral and (iii) senior in right of payment to any future subordinated debt of TCEH. These notes are effectively subordinated to all secured obligations of TCEH that are secured by assets other than the TCEH Collateral, to the extent of the value of the assets securing such obligations.
TCEH 15% Senior Secured Second Lien Notes (including Series B) — At September 30, 2013, the principal amount of the TCEH 15% Senior Secured Second Lien Notes totaled $1.571 billion. These notes mature in April 2021, with interest payable in cash quarterly in arrears on January 1, April 1, July 1 and October 1 at a fixed rate of 15% per annum. The notes are fully and unconditionally guaranteed on a joint and several basis by EFCH and, subject to certain exceptions, each subsidiary of TCEH that guarantees the TCEH Senior Secured Facilities. The notes are secured, on a second-priority basis, by security interests in all of the assets of TCEH, and the guarantees (other than the guarantee of EFCH) are secured on a second-priority basis by all of the assets and equity interests of all of the Guarantors other than EFCH (collectively, the Subsidiary Guarantors), in each case, to the extent such assets and security interests secure obligations under the TCEH Senior Secured Facilities on a first-priority basis, subject to certain exceptions (including the elimination of the pledge of equity interests of any Subsidiary Guarantor to the extent that separate financial statements would be required to be filed with the SEC for such Subsidiary Guarantor under Rule 3-16 of Regulation S-X) and permitted liens. The guarantee from EFCH is not secured.
The notes are senior obligations of the issuer and rank equally in right of payment with all senior indebtedness of TCEH, are senior in right of payment to all existing or future unsecured debt of TCEH to the extent of the value of the TCEH Collateral (after taking into account any first-priority liens on the TCEH Collateral) and are senior in right of payment to any future subordinated debt of TCEH. These notes are effectively subordinated to TCEH's obligations under the TCEH Senior Secured Facilities, the TCEH Senior Secured Notes and TCEH's commodity and interest rate hedges that are secured by a first-priority lien on the TCEH Collateral and any future obligations subject to first-priority liens on the TCEH Collateral, to the extent of the value of the TCEH Collateral, and to all secured obligations of TCEH that are secured by assets other than the TCEH Collateral, to the extent of the value of the assets securing such obligations.
TCEH 10.25% Senior Notes (including Series B) and 10.50/11.25% Senior Toggle Notes (collectively, the TCEH Senior Notes) — At September 30, 2013, the principal amount of the TCEH Senior Notes totaled $5.237 billion, including $363 million aggregate principal amount held by EFH Corp. and EFIH, and the notes are fully and unconditionally guaranteed on a joint and several unsecured basis by TCEH's direct parent, EFCH (which owns 100% of TCEH), and by each subsidiary that guarantees the TCEH Senior Secured Facilities. The TCEH 10.25% Notes mature in November 2015, with interest payable in cash semi-annually in arrears on May 1 and November 1 at a fixed rate of 10.25% per annum. The TCEH Toggle Notes mature in November 2016, with interest payable semi-annually in arrears on May 1 and November 1 at a fixed rate of 10.50% per annum.
Fair Value of Long-Term Debt
At September 30, 2013 and December 31, 2012, the estimated fair value of our long-term debt (excluding capital leases) totaled $15.873 billion and $17.858 billion, respectively, and the carrying amount totaled $30.128 billion and $30.342 billion, respectively. At September 30, 2013 and December 31, 2012, the estimated fair value of our short-term borrowings under the TCEH Revolving Credit Facilities totaled $1.371 billion and $1.500 billion, respectively, and the carrying amount totaled $2.054 billion. We determine fair value in accordance with accounting standards as discussed in Note 8, and at September 30, 2013, our debt fair value represents Level 2 valuations. We obtain security pricing from a vendor who uses broker quotes and third-party pricing services to determine fair values. Where relevant, these prices are validated through subscription services such as Bloomberg.
TCEH Interest Rate Swap Transactions
TCEH employs interest rate swaps to hedge exposure to its variable rate debt. As reflected in the table below, at September 30, 2013, TCEH has entered into the following series of interest rate swap transactions that effectively fix the interest rates at between 5.5% and 9.3%.
Fixed Rates					Expiration Dates		Notional Amount
5.5	%	-	9.30%		October 2013 through October 2014			$	18.14		billion (a)
6.8	%	-	9.00%		October 2015 through October 2017			$	12.6		billion (b)
___________
(a)	Swaps related to an aggregate $1.6 billion principal amount of debt expired in 2013. Per the terms of the transactions, the notional amount of swaps entered into in 2011 grew by $1.280 billion in 2013, substantially offsetting the expired swaps.
(b)	These swaps are effective from October 2014 through October 2017. The $12.6 billion notional amount of swaps includes $3 billion that expires in October 2015 with the remainder expiring in October 2017.
TCEH has also entered into interest rate basis swap transactions that further reduce the fixed borrowing costs achieved through the interest rate swaps. Basis swaps in effect at September 30, 2013 totaled $11.967 billion notional amount. The basis swaps relate to debt outstanding through 2014.
The interest rate swap counterparties are secured on an equal and ratable basis by the same collateral pledged to the lenders under the TCEH Senior Secured Facilities and the TCEH Senior Secured Notes.
The interest rate swaps have resulted in net gains (losses) reported in interest expense and related charges as follows:
	Three Months Ended September 30,								Nine Months Ended September 30,
	2013				2012				2013				2012
Realized net loss	$	(160	)		$	(168	)		$	(466	)		$	(505	)
Unrealized net gain (loss)	413				(20		)		899				(16		)
Total	$	253			$	(188	)		$	433			$	(521	)
The cumulative unrealized mark-to-market net liability related to all TCEH interest rate swaps totaled $1.167 billion and $2.065 billion at September 30, 2013 and December 31, 2012, respectively, of which $57 million and $65 million (both pretax), respectively, were reported in accumulated other comprehensive income. See Note 8.

Commitments_And_Contingencies

Commitments And Contingencies	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments And Contingencies	'
	COMMITMENTS AND CONTINGENCIES
	Guarantees
	We have entered into contracts that contain guarantees to unaffiliated parties that could require performance or payment under certain conditions. Material guarantees are discussed below.
	See Note 5 for discussion of guarantees and security for certain of our debt and EFCH guarantees of certain EFH Corp. debt.
	Letters of Credit
	At September 30, 2013, TCEH had outstanding letters of credit under its credit facilities totaling $776 million as follows:
	•	$353 million to support risk management and trading margin requirements in the normal course of business, including over-the-counter hedging transactions and collateral postings with ERCOT;
	•	$208 million to support floating rate pollution control revenue bond debt with an aggregate principal amount of $204 million (the letters of credit are available to fund the payment of such debt obligations and expire in 2014);
	•	$65 million to support TCEH's REP financial requirements with the PUCT, and
	•	$150 million for miscellaneous credit support requirements.
	Litigation
	Aurelius Capital Master, Ltd. and ACP Master, Ltd. (Aurelius) filed a lawsuit in March 2013, amended in May 2013, in the United States District Court for the Northern District of Texas (Dallas Division) against EFCH as a nominal defendant and each of the current directors and a former director of EFCH. In the lawsuit, Aurelius, as a creditor under the TCEH Senior Secured Facilities and certain TCEH secured bonds, both of which are guaranteed by EFCH, filed a derivative claim against EFCH and its directors. Aurelius alleges that the directors of EFCH breached their fiduciary duties to EFCH and its creditors, including Aurelius, by permitting TCEH to make certain loans "without collecting fair and reasonably equivalent value." The lawsuit seeks recovery for the benefit of EFCH. EFCH and the directors have filed a motion to dismiss this lawsuit, which has been fully briefed and is pending before the district court. We cannot predict the outcome of this proceeding, including the financial effects, if any.
	Litigation Related to Generation Facilities — In November 2010, an administrative appeal challenging the decision of the TCEQ to renew and amend Oak Grove Management Company LLC's (Oak Grove) (a wholly owned subsidiary of TCEH) Texas Pollutant Discharge Elimination System (TPDES) permit related to water discharges was filed by Robertson County: Our Land, Our Lives and Roy Henrichson in the Travis County, Texas District Court. Plaintiffs sought a reversal of the TCEQ's order and a remand back to the TCEQ for further proceedings. The district court affirmed the TCEQ's issuance of the TPDES permit to Oak Grove. In December 2012, plaintiffs appealed the district court's decision to the Third Court of Appeals in Austin, Texas. The case has been fully briefed, but the Court has not issued a decision and no date for oral argument has been scheduled. While we cannot predict the timing or outcome of this proceeding, we believe the renewal and amendment of the Oak Grove TPDES permit are protective of the environment and were in accordance with applicable law.
	In September 2010, the Sierra Club filed a lawsuit in the United States District Court for the Eastern District of Texas (Texarkana Division) against EFH Corp. and Luminant Generation Company LLC (a wholly owned subsidiary of TCEH) for alleged violations of the Clean Air Act (CAA) at Luminant's Martin Lake generation facility. In May 2012, the Sierra Club filed a lawsuit in the US District Court for the Western District of Texas (Waco Division) against EFH Corp. and Luminant Generation Company LLC for alleged violations of the CAA at Luminant's Big Brown generation facility. The Big Brown case is currently scheduled for trial in February 2014. The Martin Lake case does not have a trial date. While we are unable to estimate any possible loss or predict the outcome, we believe that the Sierra Club's claims are without merit, and we intend to vigorously defend these lawsuits. In addition, in December 2010 and again in October 2011, the Sierra Club informed Luminant that it may sue Luminant for allegedly violating CAA provisions in connection with Luminant's Monticello generation facility. In May 2012, the Sierra Club informed us that it may sue us for allegedly violating CAA provisions in connection with Luminant's Sandow 4 generation facility. While we cannot predict whether the Sierra Club will actually file suit regarding Monticello or Sandow 4 or the outcome of any resulting proceedings, we believe we have complied with the requirements of the CAA at all of our generation facilities.
	Litigation Related to EPA Reviews — In June 2008, the EPA issued an initial request for information to TCEH under the EPA's authority under Section 114 of the CAA. The stated purpose of the request is to obtain information necessary to determine compliance with the CAA, including New Source Review Standards and air permits issued by the TCEQ for the Big Brown, Monticello and Martin Lake generation facilities. In April 2013, we received an additional information request from the EPA under Section 114 related to the Big Brown, Martin Lake and Monticello facilities as well as an initial information request related to the Sandow 4 generation facility. Historically, as the EPA has pursued its New Source Review enforcement initiative, companies that have received a large and broad request under Section 114, such as the request received by TCEH, have in many instances subsequently received a notice of violation from the EPA, which has in some cases progressed to litigation or settlement.
	In July 2012, the EPA sent us a notice of violation alleging noncompliance with the CAA's New Source Review Standards and the air permits at our Martin Lake and Big Brown generation facilities. In September 2012, we filed a petition for review in the United States Court of Appeals for the Fifth Circuit (Fifth Circuit Court) seeking judicial review of the EPA's notice of violation. Given recent legal precedent subjecting agency orders like the notice of violation to judicial review, we filed the petition for review to preserve our ability to challenge the EPA's issuance of the notice and its defects. In October 2012, the EPA filed a motion to dismiss our petition. In December 2012, the Fifth Circuit Court issued an order that will delay a ruling on the EPA's motion to dismiss until after the case has been fully briefed and oral argument, if any, is held.
	In July 2013, the EPA sent us a second notice of violation alleging noncompliance with the CAA's New Source Review Standards at our Martin Lake and Big Brown generation facilities. In July 2013, we filed a petition for review in the Fifth Circuit Court seeking judicial review of the EPA's July 2013 notice of violation. In September 2013, the Fifth Circuit Court consolidated the petitions for review of the July 2012 and July 2013 notices of violation and established a briefing schedule for the consolidated cases.
	In August 2013, the United States Department of Justice, acting as the attorneys for the EPA, filed a civil enforcement lawsuit against Luminant Generation Company LLC and Big Brown Power Company LLC in federal district court in Dallas, alleging violations of the CAA at our Big Brown and Martin Lake generation facilities. In September 2013, we filed a motion to stay this lawsuit pending the outcome of the Fifth Circuit Court's review of the July 2012 and July 2013 notices of violation. We believe that we have complied with all requirements of the CAA and intend to vigorously defend these allegations. We cannot predict the outcome of these proceedings, including the financial effects, if any.
	Cross-State Air Pollution Rule (CSAPR)
	In July 2011, the EPA issued the CSAPR, compliance with which would have required significant additional reductions of sulfur dioxide (SO2) and nitrogen oxides (NOx) emissions from our fossil-fueled generation units. In September 2011, we filed a petition for review in the US Court of Appeals for the District of Columbia Circuit (D.C. Circuit Court) challenging the CSAPR as it applies to Texas. If the CSAPR had taken effect, it would have caused us to, among other actions, idle two lignite/coal-fueled generation units and cease certain lignite mining operations by the end of 2011.
	In February 2012, the EPA released a final rule (Final Revisions) and a proposed rule revising certain aspects of the CSAPR, including increases in the emissions budgets for Texas and our generation assets as compared to the July 2011 version of the rule. In April 2012, we filed in the D.C. Circuit Court a petition for review of the Final Revisions on the ground, among others, that the rules do not include all of the budget corrections we requested from the EPA. The parties to the case agreed that the case should be held in abeyance pending the conclusion of the CSAPR rehearing proceeding discussed below. In June 2012, the EPA finalized the proposed rule (Second Revised Rule). As compared to the proposed revisions to the CSAPR issued by the EPA in October 2011, the Final Revisions and the Second Revised Rule finalize emissions budgets for our generation assets that are approximately 6% lower for SO2, 3% higher for annual NOx and 2% higher for seasonal NOx.
	In August 2012, the D.C. Circuit Court vacated the CSAPR, remanding it to the EPA for further proceedings. As a result, the CSAPR, the Final Revisions and the Second Revised Rule do not impose any immediate requirements on us, the State of Texas, or other affected parties. The D.C. Circuit Court's order stated that the EPA was expected to continue administering the CAIR (the predecessor rule to the CSAPR) pending the EPA's further consideration of the rule. In October 2012, the EPA and certain other parties that supported the CSAPR filed petitions with the D.C. Circuit Court seeking review by the full court of the panel's decision to vacate and remand the CSAPR. In January 2013, the D.C. Circuit Court denied these requests for rehearing, concluding the CSAPR rehearing proceeding. In March 2013, the EPA and certain other parties that supported the CSAPR submitted petitions to the US Supreme Court seeking its review of the D.C. Circuit Court decision. In June 2013, the US Supreme Court granted review of the D.C. Circuit Court's decision. The court is scheduled to hear oral arguments in the case in December 2013. We cannot predict the outcome of the review by the US Supreme Court.
	State Implementation Plan (SIP)
	In September 2010, the EPA disapproved a portion of the SIP pursuant to which the TCEQ implements its program to achieve the requirements of the CAA. The EPA disapproved the Texas standard permit for pollution control projects (PCP). We hold several permits issued pursuant to the TCEQ standard permit conditions for pollution control projects. We challenged the EPA's disapproval by filing a lawsuit in the Fifth Circuit Court arguing that the TCEQ's adoption of the standard permit conditions for pollution control projects was consistent with the CAA. In March 2012, the Fifth Circuit Court vacated the EPA's disapproval of the Texas standard permit for pollution control projects and remanded the matter to the EPA for expedited reconsideration. In September 2013, the State of Texas filed a motion with the Fifth Circuit Court requesting that the Court amend and enforce its judgment in this case by requiring the EPA to satisfy the Court's judgment by taking action on the pending SIP revision regarding Texas' PCP standard permit no later than December 31, 2013. We cannot predict the timing or outcome of the EPA's reconsideration, including the financial effects, if any.
	In November 2010, the EPA disapproved a different portion of the SIP under which the TCEQ had been phasing out a long-standing exemption for certain emissions that unavoidably occur during startup, shutdown and maintenance activities and replacing that exemption with a more limited affirmative defense that will itself be phased out and replaced by TCEQ-issued generation facility-specific permit conditions. We, like many other electricity generation facility operators in Texas, have asserted applicability of the exemption or affirmative defense, and the TCEQ has not objected to that assertion. We have also applied for and received the generation facility-specific permit amendments. We challenged the EPA's disapproval of Texas' affirmative defense for planned maintenance, startup and shutdown by filing a lawsuit in the Fifth Circuit Court arguing that the TCEQ's adoption of the affirmative defense and phase-out of that affirmative defense as permits are issued is consistent with the CAA. In July 2012, the Fifth Circuit Court denied our challenge and ruled that the EPA's actions were in accordance with the CAA. In October 2012, the Fifth Circuit Court panel withdrew its opinion and issued a second, expanded opinion that again upheld the EPA's disapproval. In November 2012, we filed a petition with the Fifth Circuit Court asking for review by the full Fifth Circuit Court of the panel's second opinion. Other parties to the proceedings also filed a petition with the Fifth Circuit Court asking the panel to reconsider its decision. In March 2013, the Fifth Circuit Court panel withdrew its second opinion and issued a third opinion that again upheld the EPA's actions. In April 2013, the Fifth Circuit Court also denied our November 2012 petition for rehearing of the panel's second opinion and denied the request by other parties for the panel to reconsider its second decision. Following the issuance of the mandate, we filed a motion to recall the mandate, which was denied in a single-judge order. In June 2013, we submitted a petition to the US Supreme Court seeking its review of the Fifth Circuit Court's decision to uphold EPA's disapproval of Texas' affirmative defense for planned maintenance, startup and shutdown. In October 2013, the US Supreme Court denied our petition for review of that portion of the Fifth Circuit Court's decision. The decision is not anticipated to have a material effect on our results of operations, liquidity or financial condition.
	Other Matters
	We are involved in various legal and administrative proceedings in the normal course of business, the ultimate resolutions of which, in the opinion of management, are not anticipated to have a material effect on our results of operations, liquidity or financial condition.

Equity

Equity	9 Months Ended
	Sep. 30, 2013
Stockholders' Equity Note [Abstract]	'
Equity	'
	MEMBERSHIP INTERESTS/EQUITY
	Dividend Restrictions
	While EFCH has no contractual dividend restrictions, the TCEH Senior Secured Facilities generally restrict TCEH from making any cash distribution to any of its parent companies for the ultimate purpose of making a cash distribution on their ownership interests unless at the time, and after giving effect to such distribution, TCEH's consolidated total debt (as defined in the TCEH Senior Secured Facilities) to Adjusted EBITDA would be equal to or less than 6.5 to 1.0. At September 30, 2013, the ratio was 10.6 to 1.0.
	In addition, the TCEH Senior Secured Facilities and indentures governing the TCEH Senior Notes, TCEH Senior Secured Notes and TCEH Senior Secured Second Lien Notes generally restrict TCEH's ability to make distributions or loans to any of its parent companies, EFCH and EFH Corp., unless such distributions or loans are expressly permitted under the TCEH Senior Secured Facilities and the indentures governing such notes.
	In addition, under applicable law, we are prohibited from paying any distribution to the extent that immediately following payment of such distribution, we would be insolvent.
	Noncontrolling Interests
	As discussed in Note 2, we consolidate a joint venture formed in 2009 for the purpose of developing two new nuclear generation units, which results in a noncontrolling interests component of equity. Net loss attributable to the noncontrolling interests was immaterial for the nine months ended September 30, 2013 and 2012.
	Membership Interests/Equity
	In April 2013, EFCH was converted from a Texas corporation to a Delaware limited liability company. The following tables present the changes to membership interests/equity for the nine months ended September 30, 2013 and 2012.
	Nine Months Ended September 30, 2013
		EFCH Shareholder's Equity/Membership Interests
		Common			Retained			Membership			Accumulated			Noncontrolling			Total
		Stock			Earnings			Interests			Other			Interests			Equity
					(Deficit)						Comprehensive
											Income (Loss)
	Balance at December 31, 2012	$	7,665		$	(18,129	)	$	—		$	(42	)	$	112		$	(10,394	)
	Net loss	—			(526		)	(160		)	—			—			(686		)
	Net effect of cash flow hedges	—			—			—			5			—			5
	Investment by noncontrolling interests	—			—			—			—			3			3
	Effect of debt push-down from EFH Corp. (a)	434			—			3			—			—			437
	Dissolution of TXU Receivables Company	—			—			—			—			(10		)	(10		)
	Capital structure conversion	(8,099		)	18,655			(10,556		)	—			—			—
	Other				—			2			—			—			2
	Balance at September 30, 2013	$	—		$	—		$	(10,711	)	$	(37	)	$	105		$	(10,643	)
	Nine Months Ended September 30, 2012
		EFCH Shareholder's Equity
		Common			Retained			Accumulated			Noncontrolling			Total
		Stock			Earnings			Other			Interests			Equity
					(Deficit)			Comprehensive
								Income (Loss)
	Balance at December 31, 2011	$	7,351		$	(15,121	)	$	(49	)	$	103		$	(7,716	)
	Net loss	—			(1,298		)	—			—			(1,298		)
	Gain on settlement of reimbursement agreement with Oncor (Note 11)	2			—			—			—			2
	Effect of stock-based incentive compensation plans	6			—			—			—			6
	Net effect of cash flow hedges	—			—			5			—			5
	Investment by noncontrolling interests	—			—			—			6			6
	Effect of debt push-down from EFH Corp. (a)	30			—			—			—			30
	Other	(1		)	—			—			1			—
	Balance at September 30, 2012	$	7,388		$	(16,419	)	$	(44	)	$	110		$	(8,965	)
	_______________
	(a)	Represents the interest and income tax effects of debt pushed down from EFH Corp. (Note 5).

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	FAIR VALUE MEASUREMENTS
	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. Our Level 1 assets and liabilities include exchange-traded commodity contracts. For example, some of our derivatives are NYMEX or ICE futures and swaps transacted through clearing brokers for which prices are actively quoted.
	•	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. For example, our Level 2 assets and liabilities include forward commodity positions at locations for which over-the-counter broker quotes are available.
	•	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. For example, our Level 3 assets and liabilities include certain derivatives whose values are derived from pricing models that utilize multiple inputs to the valuations, including inputs that are not observable or easily corroborated through other means. See further discussion below.
	Our valuation policies and procedures are developed, maintained and validated by an EFH Corp. centralized risk management group that reports to the EFH Corp. Chief Financial Officer, who also functions as the Chief Risk Officer. Risk management functions include commodity price reporting and validation, valuation model validation, risk analytics, risk control, credit risk management and risk reporting.
	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. These methods include, among others, the use of broker quotes and statistical relationships between different price curves.
	In utilizing broker quotes, we attempt to obtain multiple quotes from brokers (generally non-binding) that are active in the commodity markets in which we participate (and require at least one quote from two brokers to determine a pricing input as observable); however, not all pricing inputs are quoted by brokers. The number of broker quotes received for certain pricing inputs varies depending on the depth of the trading market, each individual broker's publication policy, recent trading volume trends and various other factors. In addition, for valuation of interest rate swaps, we use generally accepted interest rate swap valuation models utilizing month-end interest rate curves.
	Probable loss of default by either us or our counterparties is considered in determining the fair value of derivative assets and liabilities. These non-performance risk adjustments take into consideration credit enhancements and the credit risks associated with our credit standing and the credit standing of our counterparties (see Note 9 for additional information regarding credit risk associated with our derivatives). We utilize published credit ratings, default rate factors and bond trading values in calculating these fair value measurement adjustments.
	Certain derivatives and financial instruments are valued utilizing option pricing models that take into consideration multiple inputs including, but not limited to, commodity prices, volatility factors, discount rates and other market based factors. Additionally, when there is not a sufficient amount of observable market data, valuation models are developed that incorporate proprietary views of market factors. Significant unobservable inputs used to develop the valuation models include volatility curves, correlation curves, illiquid pricing locations and credit/non-performance risk assumptions. Those valuation models are generally used in developing long-term forward price curves for certain commodities. We believe the development of such curves is consistent with industry practice; however, the fair value measurements resulting from such curves are classified as Level 3.
	The significant unobservable inputs and valuation models are developed by employees trained and experienced in market operations and fair value measurement and validated by the company's risk management group, which also further analyzes any significant changes in Level 3 measurements. Significant changes in the unobservable inputs could result in significant upward or downward changes in the fair value measurement.
	With respect to amounts presented in the following fair value hierarchy tables, the fair value measurement of an asset or liability (e.g., a contract) is required to fall in its entirety in one level, based on the lowest level input that is significant to the fair value measurement. Certain assets and liabilities would be classified in Level 2 instead of Level 3 of the hierarchy except for the effects of credit reserves and non-performance risk adjustments, respectively. Assessing the significance of a particular input to the fair value measurement in its entirety requires judgment, considering factors specific to the asset or liability being measured.
	Assets and liabilities measured at fair value consisted of the following:
	30-Sep-13
		Level 1			Level 2				Level 3 (a)				Reclassification (b)				Total
	Assets:
	Commodity contracts	$	140		$	941			$	48			$	2			$	1,131
	Interest rate swaps	—			1				—				—				1
	Nuclear decommissioning trust – equity securities (c)	299			172				—				—				471
	Nuclear decommissioning trust – debt securities (c)	—			266				—				—				266
	Total assets	$	439		$	1,380			$	48			$	2			$	1,869
	Liabilities:
	Commodity contracts	$	129		$	26			$	52			$	2			$	209
	Interest rate swaps	—			—				1,167				—				1,167
	Total liabilities	$	129		$	26			$	1,219			$	2			$	1,376
	31-Dec-12
		Level 1			Level 2				Level 3 (a)				Total
	Assets:
	Commodity contracts	$	180		$	1,784			$	83			$	2,047
	Interest rate swaps	—			2				—				2
	Nuclear decommissioning trust – equity securities (c)	249			144				—				393
	Nuclear decommissioning trust – debt securities (c)	—			261				—				261
	Total assets	$	429		$	2,191			$	83			$	2,703
	Liabilities:
	Commodity contracts	$	208		$	121			$	54			$	383
	Interest rate swaps	—			2,067				—				2,067
	Total liabilities	$	208		$	2,188			$	54			$	2,450
	_______________
	(a)	See table below for description of Level 3 assets and liabilities.
	(b)	Fair values are determined on a contract basis, but certain contracts result in a current asset and a noncurrent liability, or vice versa, as presented in the balance sheet.
	(c)	The nuclear decommissioning trust investment is included in the investments line in the balance sheet. See Note 12.
	Commodity contracts consist primarily of natural gas, electricity, fuel oil, uranium and coal derivative instruments entered into for hedging purposes and include physical contracts that have not been designated "normal" purchases or sales. See Note 9 for further discussion regarding the company's use of derivative instruments.
	Interest rate swaps include variable-to-fixed rate swap instruments that are economic hedges of interest on long-term debt as well as interest rate basis swaps designed to effectively reduce the hedged borrowing costs. See Note 5 for discussion of interest rate swaps.
	Nuclear decommissioning trust assets represent securities held for the purpose of funding the future retirement and decommissioning of the nuclear generation units. These investments include equity, debt and other fixed-income securities consistent with investment rules established by the NRC and the PUCT.
	There were no significant transfers between Level 1 and Level 2 of the fair value hierarchy for the three and nine months ended September 30, 2013 and 2012. See the table of changes in fair values of Level 3 assets and liabilities below for discussion of transfers between Level 2 and Level 3.
	The following tables present the fair value of the Level 3 assets and liabilities by major contract type and the significant unobservable inputs used in the valuations at September 30, 2013 and December 31, 2012:
	30-Sep-13
			Fair Value
	Contract Type (a)		Assets			Liabilities				Total				Valuation Technique		Significant Unobservable Input		Range (b)
	Electricity purchases and sales		$	5		$	(2	)		$	3			Valuation Model		Illiquid pricing locations (c)		$30 to $45/MWh
																Hourly price curve shape (d)		$20 to $70/MWh
	Electricity spread options		—			(19		)		(19		)		Option Pricing Model		Gas to power correlation (e)		45% to 100%
																Power volatility (f)		10% to 30%
	Electricity congestion revenue rights		37			(5		)		32				Market Approach (g)		Illiquid price differences between settlement points (h)		$0.00 to $30.00
	Coal purchases		1			(12		)		(11		)		Market Approach (g)		Illiquid price variances between mines (i)		$0.00 to $1.00
																Probability of default (j)		0% to 40%
																Recovery rate (k)		0% to 40%
	Interest rate swaps		—			(1,167		)		(1,167		)		Valuation Model		Nonperformance risk adjustment (l)		30% to 35%
	Other		5			(14		)		(9		)
	Total		$	48		$	(1,219	)		$	(1,171	)
	31-Dec-12
			Fair Value
Contract Type (a)		Assets			Liabilities				Total				Valuation Technique		Significant Unobservable Input		Range (b)
Electricity purchases and sales		$	5		$	(9	)		$	(4	)		Valuation Model		Illiquid pricing locations (c)		$20 to $40/MWh
															Hourly price curve shape (d)		$20 to $50/MWh
Electricity spread options		34			(10		)		24				Option Pricing Model		Gas to power correlation (e)		20% to 90%
															Power volatility (f)		20% to 40%
Electricity congestion revenue rights		41			(2		)		39				Market Approach (g)		Illiquid price differences between settlement points (h)		$0.00 to $0.50
Coal purchases		—			(32		)		(32		)		Market Approach (g)		Illiquid price variances between mines (i)		$0.00 to $1.00
															Probability of default (j)		5% to 40%
															Recovery rate (k)		0% to 40%
Other		3			(1		)		2
Total		$	83		$	(54	)		$	29
____________
(a)	Electricity purchase and sales contracts include wind generation agreements and hedging positions in the ERCOT west region as well as power contracts, the valuations of which include unobservable inputs related to the hourly shaping of the price curve. Electricity spread option contracts consist of physical electricity call options. Electricity congestion revenue rights contracts consist of forward purchase contracts (swaps and options) used to hedge electricity price differences between settlement points within ERCOT. Coal purchase contracts relate to western (Powder River Basin) coal. Interest rate swaps are held by TCEH to hedge exposure to its variable rate debt.
(b)	The range of the inputs may be influenced by factors such as time of day, delivery period, season and location.
(c)	Based on the historical range of forward average monthly ERCOT West Hub prices.
(d)	Based on the historical range of forward average hourly ERCOT North Hub prices.
(e)	Estimate of the historical range based on forward natural gas and on-peak power prices for the ERCOT hubs most relevant to our spread options.
(f)	Based on historical forward price changes.
(g)	While we use the market approach, there is either insufficient market data to consider the valuation liquid or the significance of credit reserves or non-performance risk adjustments results in a Level 3 designation.
(h)	Based on the historical price differences between settlement points in the ERCOT North Hub and the ERCOT West Hub.
(i)	Based on the historical range of price variances between mine locations.
(j)	Estimate of the range of probabilities of default based on past experience and the length of the contract as well as our and counterparties' credit ratings.
(k)	Estimate of the default recovery rate based on historical corporate rates.
(l)	Estimate of nonperformance risk adjustment based on TCEH senior secured bond trading values. See discussion immediately below regarding transfers into Level 3.
The following table presents the changes in fair value of the Level 3 assets and liabilities for the three and nine months ended September 30, 2013 and 2012. Transfers into Level 3 during 2013 as noted below reflect a nonperformance risk adjustment in the valuation of the TCEH interest rate swaps, which are secured by a first-lien interest in the same assets of TCEH (on a pari passu basis) with the TCEH Senior Secured Facilities and the TCEH Senior Secured Notes (see Note 5). At September 30, 2013, the estimated fair value of these interest rate swaps totaled $1.518 billion before consideration of nonperformance risk adjustment and $1.167 billion after consideration of such adjustment. The amount of the nonperformance risk adjustment was after consideration of derivative assets related to contracts with the same counterparties that are also secured by a first-lien interest in the assets of TCEH, and a master netting agreement is in place that provides for netting and setoff of amounts related to these contracts.
	Three Months Ended September 30,							Nine Months Ended September 30,
	2013			2012				2013				2012
Net asset balance at beginning of period	$	88		$	12			$	29			$	53
Total unrealized valuation gains (losses)	(24		)	12				(41		)		(5		)
Purchases, issuances and settlements (a):
Purchases	6			17				66				30
Issuances	—			(4		)		(6		)		(15		)
Settlements	(62		)	(56		)		(45		)		(34		)
Transfers into Level 3 (b)	(1,179		)	3				(1,178		)		(42		)
Transfers out of Level 3 (b)	—			—				4				(3		)
Net change (c)	(1,259		)	(28		)		(1,200		)		(69		)
Net liability balance at end of period	$	(1,171	)	$	(16	)		$	(1,171	)		$	(16	)
Unrealized valuation gains (losses) relating to instruments held at end of period	$	254		$	15			$	280			$	(22	)
____________
(a)	Settlements reflect reversals of unrealized mark-to-market valuations previously recognized in net income. Purchases and issuances reflect option premiums paid or received.
(b)	Includes transfers due to changes in the observability of significant inputs. Transfers in and out occur at the end of each quarter, which is when the assessments are performed. All Level 3 transfers during the periods presented are in and out of Level 2.
(c)	Substantially all changes in values of commodity contracts are reported in the income statement in net gain (loss) from commodity hedging and trading activities. Changes in values of interest rate swaps are reported in the income statement in interest expense and related charges. Activity excludes changes in fair value in the month the position settled as well as amounts related to positions entered into and settled in the same month.

Commodity_And_Other_Derivative

Commodity And Other Derivative Contractual Assets And Liabilities	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Commodity And Other Derivative Contractual Assets And Liabilities	'
	COMMODITY AND OTHER DERIVATIVE CONTRACTUAL ASSETS AND LIABILITIES
	Strategic Use of Derivatives
	We transact in derivative instruments, such as options, swaps, futures and forward contracts, primarily to manage electricity price risk and interest rate risk exposure. Our principal activities involving derivatives consist of a natural gas hedging program and the hedging of interest costs on our long-term debt. See Note 8 for a discussion of the fair value of all derivatives.
	Natural Gas Hedging Program — TCEH has a natural gas hedging program designed to reduce exposure to changes in future electricity prices due to changes in the price of natural gas, thereby hedging future revenues from electricity sales and related cash flows. In ERCOT, the wholesale price of electricity has generally moved with the price of natural gas. Under the program, TCEH has entered into market transactions involving natural gas-related financial instruments and has sold forward natural gas through 2014. These transactions are intended to hedge a portion of electricity price exposure related to expected lignite/coal- and nuclear-fueled generation for this period. Unrealized gains and losses arising from changes in the fair value of the instruments under the program as well as realized gains and losses upon settlement of the instruments are reported in the income statement in net gain (loss) from commodity hedging and trading activities.
	Interest Rate Swap Transactions — Interest rate swap agreements are used to reduce exposure to interest rate changes by converting floating-rate debt to fixed rates, thereby hedging future interest costs and related cash flows. Interest rate basis swaps are used to effectively reduce the hedged borrowing costs. Unrealized gains and losses arising from changes in the fair value of the swaps as well as realized gains and losses upon settlement of the swaps are reported in the income statement in interest expense and related charges. See Note 5 for additional information about interest rate swap agreements.
	Other Commodity Hedging and Trading Activity — TCEH also enters into derivatives, including electricity, natural gas, fuel oil, uranium, emission and coal instruments, generally for shorter-term hedging purposes. To a limited extent, TCEH also enters into derivative transactions for proprietary trading purposes, principally in natural gas and electricity markets.
	Financial Statement Effects of Derivatives
	Substantially all derivative contractual assets and liabilities arise from mark-to-market accounting consistent with accounting standards related to derivative instruments and hedging activities. The following tables provide detail of commodity and other derivative contractual assets and liabilities (with the column totals representing the net positions of the contracts) as reported in the balance sheets at September 30, 2013 and December 31, 2012:
	30-Sep-13
		Derivative assets								Derivative liabilities
		Commodity contracts				Interest rate swaps				Commodity contracts				Interest rate swaps				Total
	Current assets	$	972			$	1			$	—			$	—			$	973
	Noncurrent assets	159				—				—				—				159
	Current liabilities	(2		)		—				(204		)		(388		)		(594		)
	Noncurrent liabilities	—				—				(3		)		(779		)		(782		)
	Net assets (liabilities)	$	1,129			$	1			$	(207	)		$	(1,167	)		$	(244	)
	31-Dec-12
		Derivative assets								Derivative liabilities
		Commodity contracts				Interest rate swaps				Commodity contracts				Interest rate swaps				Total
	Current assets	$	1,461			$	2			$	—			$	—			$	1,463
	Noncurrent assets	586				—				—				—				586
	Current liabilities	—				—				(366		)		(528		)		(894		)
	Noncurrent liabilities	—				—				(17		)		(1,539		)		(1,556		)
	Net assets (liabilities)	$	2,047			$	2			$	(383	)		$	(2,067	)		$	(401	)
	At September 30, 2013 and December 31, 2012, there were no derivative positions accounted for as cash flow or fair value hedges.
	The following table presents the pretax effect of derivatives on net income (gains (losses)), including realized and unrealized effects:
			Three Months Ended September 30,								Nine Months Ended September 30,
	Derivative (income statement presentation)		2013				2012				2013				2012
	Commodity contracts (Net gain (loss) from commodity hedging and trading activities) (a)		$	98			$	(95	)		$	54			$	130
	Interest rate swaps (Interest expense and related charges) (b)		253				(188		)		433				(521		)
	Net gain (loss)		$	351			$	(283	)		$	487			$	(391	)
	_______________
	(a)	Amount represents changes in fair value of positions in the derivative portfolio during the period, as realized amounts related to positions settled are assumed to equal reversals of previously recorded unrealized amounts.
	(b)	Includes unrealized mark-to-market net gain (loss) as well as the net realized effect on interest paid/accrued, both reported in "Interest Expense and Related Charges" (see Note 12).
	The following table presents the pretax effect (all losses) on net income and other comprehensive income (OCI) of derivative instruments previously accounted for as cash flow hedges. There were no amounts recognized in OCI for the three and nine months ended September 30, 2013 and 2012.
			Three Months Ended September 30,								Nine Months Ended September 30,
	Derivative (income statement presentation)		2013				2012				2013				2012
	Interest rate swaps (Interest expense and related charges)		$	(1	)		$	(1	)		$	(6	)		$	(6	)
	Interest rate swaps (Depreciation and amortization)		(1		)		(1		)		(2		)		(2		)
	Total		$	(2	)		$	(2	)		$	(8	)		$	(8	)
	Accumulated other comprehensive income related to cash flow hedges at September 30, 2013 and December 31, 2012 totaled $37 million and $42 million in net losses (after-tax), respectively, substantially all of which relates to interest rate swaps previously accounted for as cash flow hedges. We expect that $2 million of net losses (after-tax) related to cash flow hedges included in accumulated other comprehensive income at September 30, 2013 will be reclassified into net income during the next twelve months as the related hedged transactions affect net income.
	Balance Sheet Presentation of Derivatives
	Consistent with elections under US GAAP to present amounts on a gross basis, we report derivative assets and liabilities in the balance sheet without taking into consideration netting arrangements we have with counterparties. This presentation can result in significant volatility in derivative assets and liabilities because we may enter into offsetting positions with the same counterparties, resulting in both assets and liabilities, and the underlying commodity prices can change significantly from period to period.
	Margin deposits that contractually offset these derivative instruments are reported separately in the balance sheet. Margin deposits received from counterparties are either used for working capital or other corporate purposes or are deposited in a separate restricted cash account. At September 30, 2013 and December 31, 2012, essentially all margin deposits held were unrestricted.
	We maintain standardized master netting agreements with certain counterparties that allow for the netting of positive and negative exposures. Generally, we utilize the International Swaps and Derivatives Association (ISDA) standardized contract for financial transactions, the Edison Electric Institute standardized contract for physical power transactions and the North American Energy Standards Board (NAESB) standardized contract for physical natural gas transactions. These contain credit enhancements that allow for the right to offset assets and liabilities with other financial instruments and collateral received in order to reduce credit exposure between us and the counterparty. These agreements contain specific language related to margin requirements, monthly settlement netting, cross-commodity netting and early termination netting, which is negotiated with the contract counterparty.
	Certain entities are counterparties to both our natural gas hedge program positions and our interest rate swaps and have entered into master agreements that provide for netting and setoff of amounts related to these positions.
	The following tables reconcile our derivative assets and liabilities as presented in the consolidated balance sheet to net amounts after taking into consideration netting arrangements with counterparties and financial collateral:
	30-Sep-13
			Amounts Presented in Balance Sheet				Offsetting Financial Instruments (a)				Financial Collateral (Received) Pledged (b)				Net Amounts (c)
	Derivative assets:
	Commodity contracts		$	1,131			$	(613	)		$	(351	)		$	167
	Interest rate swaps		1				(1		)		—				—
	Total derivative assets		1,132				(614		)		(351		)		167
	Derivative liabilities:
	Commodity contracts		(209		)		180				11				(18		)
	Interest rate swaps		(1,167		)		434				—				(733		)
	Total derivative liabilities		(1,376		)		614				11				(751		)
	Net amounts		$	(244	)		$	—			$	(340	)		$	(584	)
	31-Dec-12
			Amounts Presented in Balance Sheet				Offsetting Financial Instruments (a)				Financial Collateral (Received) Pledged (b)				Net Amounts
	Derivative assets:
	Commodity contracts		$	2,047			$	(1,263	)		$	(597	)		$	187
	Interest rate swaps		2				(2		)		—				—
Total derivative assets		2,049				(1,265		)		(597		)		187
Derivative liabilities:
Commodity contracts		(383		)		319				29				(35		)
Interest rate swaps		(2,067		)		946				—				(1,121		)
Total derivative liabilities		(2,450		)		1,265				29				(1,156		)
Net amounts		$	(401	)		$	—			$	(568	)		$	(969	)
____________
(a)	Offsetting financial instruments with respect to commodity contracts include amounts related to interest rate swaps and vice versa. Amounts exclude trade accounts receivable and payable related to settled financial instruments.
(b)	Financial collateral consists entirely of cash margin deposits.
(c)	Includes net liability positions totaling approximately $1.2 billion (before nonperformance risk adjustment) related to counterparties with positions that are secured by a first-lien interest in the same assets of TCEH (on a pari passu basis) with the TCEH Senior Secured Facilities and the TCEH Senior Secured Notes.
Derivative Volumes — The following table presents the gross notional amounts of derivative volumes at September 30, 2013 and December 31, 2012:
		30-Sep-13				31-Dec-12
Derivative type		Notional Volume								Unit of Measure
Interest rate swaps:
Floating/fixed (a)		$	30,740			$	31,060			Million US dollars
Basis		$	11,967			$	11,967			Million US dollars
Natural gas:
Natural gas forward sales and purchases (b)		452				875				Million MMBtu
Locational basis swaps		337				495				Million MMBtu
All other		2,021				1,549				Million MMBtu
Electricity		21,663				76,767				GWh
Congestion Revenue Rights (c)		82,156				111,185				GWh
Coal		11				14				Million US tons
Fuel oil		28				47				Million gallons
Uranium		575				441				Thousand pounds
_______________
(a)	Includes notional amount of interest rate swaps with maturity dates through October 2014 as well as notional amount of swaps effective from October 2014 with maturity dates through October 2017 (see Note 5).
(b)	Represents gross notional forward sales, purchases and options transactions in the natural gas hedging program. The net amount of these transactions was approximately 210 million MMBtu and 360 million MMBtu at September 30, 2013 and December 31, 2012, respectively.
(c)	Represents gross forward purchases associated with instruments used to hedge electricity price differences between settlement points within ERCOT.
Credit Risk-Related Contingent Features of Derivatives
The agreements that govern our derivative instrument transactions may contain certain credit risk-related contingent features that could trigger liquidity requirements in the form of cash collateral, letters of credit or some other form of credit enhancement. Certain of these agreements require the posting of collateral if our credit rating is downgraded by one or more credit rating agencies; however, due to our credit ratings being below investment grade, substantially all of such collateral posting requirements are already effective.
At September 30, 2013 and December 31, 2012, the fair value of liabilities related to derivative instruments under agreements with credit risk-related contingent features that were not fully cash collateralized totaled $40 million and $58 million, respectively. The liquidity exposure associated with these liabilities was reduced by cash and letter of credit postings with the counterparties totaling $9 million and $12 million at September 30, 2013 and December 31, 2012, respectively. If all the credit risk-related contingent features related to these derivatives had been triggered, including cross default provisions, at September 30, 2013 and December 31, 2012, the remaining liquidity requirements would have totaled $8 million and none, respectively.
In addition, certain derivative agreements that are collateralized primarily with liens on certain of our assets include indebtedness cross-default provisions that could result in the settlement of such contracts if there were a failure under other financing arrangements to meet payment terms or to comply with other covenants that could result in the acceleration of such indebtedness. At September 30, 2013 and December 31, 2012, the fair value of derivative liabilities subject to such cross-default provisions, largely related to interest rate swaps, totaled $1.192 billion and $2.150 billion, respectively, before consideration of the amount of assets subject to the liens. No cash collateral or letters of credit were posted with these counterparties at September 30, 2013 and December 31, 2012 to reduce the liquidity exposure. If all the credit risk-related contingent features related to these derivatives, including amounts related to cross-default provisions, had been triggered at September 30, 2013 and December 31, 2012, the remaining related liquidity requirement after reduction for derivative assets under netting arrangements but before consideration of the amount of assets subject to the liens would have totaled $1.087 billion and $1.122 billion, respectively. See Note 5 for a description of other obligations that are supported by liens on certain of our assets.
As discussed immediately above, the aggregate fair values of liabilities under derivative agreements with credit risk-related contingent features, including cross-default provisions, totaled $1.232 billion and $2.208 billion at September 30, 2013 and December 31, 2012, respectively. These amounts are before consideration of cash and letter of credit collateral posted, net accounts receivable and derivative assets under netting arrangements and assets subject to related liens.
Some commodity derivative contracts contain credit risk-related contingent features that do not provide for specific amounts to be posted if the features are triggered. These provisions include material adverse change, performance assurance, and other clauses that generally provide counterparties with the right to request additional credit enhancements. The amounts disclosed above exclude credit risk-related contingent features that do not provide for specific amounts or exposure calculations.
Concentrations of Credit Risk Related to Derivatives
TCEH has concentrations of credit risk with the counterparties to its derivative contracts. At September 30, 2013, total credit risk exposure to all counterparties related to derivative contracts totaled $1.258 billion (including associated accounts receivable). The net exposure to those counterparties totaled $275 million at September 30, 2013 after taking into effect netting arrangements, setoff provisions and collateral. At September 30, 2013, the credit risk exposure to the banking and financial sector represented 88% of the total credit risk exposure and 59% of the net exposure, a significant amount of which is related to the natural gas hedging program, and the largest net exposure to a single counterparty totaled $50 million.
Exposure to banking and financial sector counterparties is considered to be within an acceptable level of risk tolerance because all of this exposure is with counterparties with investment grade credit ratings. However, this concentration increases the risk that a default by any of these counterparties would have a material effect on our financial condition, results of operations and liquidity. The transactions with these counterparties contain certain provisions that would require the counterparties to post collateral in the event of a material downgrade in their credit rating.
We maintain credit risk policies with regard to our counterparties to minimize overall credit risk. These policies authorize specific risk mitigation tools including, but not limited to, use of standardized master agreements that allow for netting of positive and negative exposures associated with a single counterparty. Credit enhancements such as parent guarantees, letters of credit, surety bonds, liens on assets and margin deposits are also utilized. Prospective material changes in the payment history or financial condition of a counterparty or downgrade of its credit quality result in the reassessment of the credit limit with that counterparty. The process can result in the subsequent reduction of the credit limit or a request for additional financial assurances. An event of default by one or more counterparties could subsequently result in termination-related settlement payments that reduce available liquidity if amounts are owed to the counterparties related to the derivative contracts or delays in receipts of expected settlements if the counterparties owe amounts to us.

Pension_And_Other_Postretireme

Pension And Other Postretirement Employee Benefits (OPEB) Plans	9 Months Ended
	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'
Pension And Other Postretirement Employee Benefits (OPEB) Plans	'
	PENSION AND OTHER POSTRETIREMENT EMPLOYEE BENEFITS (OPEB) PLANS
	Our subsidiaries are participating employers in the EFH Retirement Plan, a defined benefit pension plan sponsored by EFH Corp. that is described further below. Our subsidiaries also participate with EFH Corp. and certain 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. The net allocated pension and OPEB costs applicable to us totaled $3 million and $10 million for the three months ended September 30, 2013 and 2012, respectively, and $9 million and $31 million for the nine months ended September 30, 2013 and 2012, respectively.
	The decrease in pension costs in 2013 reflects the implementation of certain amendments to EFH Corp.'s pension plan completed in the fourth quarter 2012 that resulted in:
	•	splitting off assets and liabilities under the plan associated with employees of Oncor and all retirees and terminated vested participants of EFH Corp. and its subsidiaries (including discontinued businesses) to a new plan sponsored and administered by Oncor (the Oncor Plan) and
	•	the termination of, distributions of benefits under, and settlement of all of EFH Corp.'s liabilities associated with active employees of EFH Corp.'s competitive businesses other than collective bargaining unit employees.
	The discount rates reflected in net pension and OPEB costs for 2013 are 4.30% and 4.10%, respectively. The expected rates of return on pension and OPEB plan assets reflected in the 2013 cost amounts are 5.4% and 6.7%, respectively.
	In the first nine months of 2013 we made a $50 million payment to EFH Corp. to settle TCEH's allocation of 2012 pension-related charges resulting from the amendments. We expect to make additional contributions in 2013 of $2 million for the pension and OPEB plans.

Related_Party_Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	RELATED-PARTY TRANSACTIONS
	The following represent our significant related-party transactions.
	•	TCEH's retail operations pay Oncor for services it provides, principally the delivery of electricity. Expenses recorded for these services, reported in fuel, purchased power costs and delivery fees, totaled $273 million and $281 million for the three months ended September 30, 2013 and 2012, respectively, and $728 million and $746 million for the nine months ended September 30, 2013 and 2012, respectively. The fees are based on rates regulated by the PUCT that apply to all REPs. The balance sheets at September 30, 2013 and December 31, 2012 reflect amounts due currently to Oncor totaling $158 million and $53 million, respectively, (included in trade accounts and other payables to affiliates) largely related to these electricity delivery fees.
	•	In August 2012, TCEH and Oncor agreed to settle at a discount two agreements related to securitization (transition) bonds issued by Oncor's bankruptcy-remote financing subsidiary in 2003 and 2004 to recover generation-related regulatory assets. Under the agreements, TCEH had been reimbursing Oncor as described immediately below. Under the settlement, TCEH paid, and Oncor received, $159 million in cash.
	Oncor collects transition surcharges from its customers to recover the transition bond payment obligations. Oncor's incremental income taxes related to the transition surcharges it collects had been reimbursed by TCEH quarterly under a noninterest bearing note payable to Oncor that was to mature in 2016. TCEH's payments on the note prior to the August 2012 settlement totaled zero and $20 million for the three and nine months ended September 30, 2012, respectively.
	Under an interest reimbursement agreement, TCEH had reimbursed Oncor on a monthly basis for interest expense on the transition bonds. Only the monthly accrual of interest under this agreement was reported as a liability. This interest expense prior to the August 2012 settlement totaled $2 million and $16 million for the three and nine months ended September 30, 2012, respectively.
	•	Notes receivable from EFH Corp. were payable to TCEH on demand (TCEH Demand Notes) and arose from cash loaned for debt principal and interest payments and other general corporate purposes of EFH Corp. At September 30, 2013 and December 31, 2012, the notes consisted of:
		30-Sep-13		31-Dec-12
	Note related to debt principal and interest payments (P&I Note)	$	—	$	465
	Note related to general corporate purposes (SG&A Note)	—		233
	Total	$	—	$	698
	The TCEH Demand Notes were guaranteed by EFIH and EFCH on a senior unsecured basis. The TCEH Demand Notes were pledged as collateral under the TCEH Senior Secured Facilities. In January 2013, EFIH used $680 million of the proceeds from its August 2012 debt issuance to pay a dividend to EFH Corp., which EFH Corp. used with cash on hand to repay the entire balance of the TCEH Demand Notes. The average daily balance of the TCEH Demand Notes totaled $683 million for the three months ended September 30, 2012 and $77 million and $822 million for the nine months ended September 30, 2013 and 2012, respectively. The TCEH Demand Notes carried interest at a rate based on the one-month LIBOR rate plus 5.00%, and interest income related to the TCEH Demand Notes totaled $9 million for the three months ended September 30, 2012 and $3 million and $33 million for the nine months ended September 30, 2013 and 2012, respectively.
	•	EFCH has a demand note payable to EFH Corp., the proceeds from which were used to repay outstanding debt. The note totaled $92 million and $81 million at September 30, 2013 and December 31, 2012, respectively, and carried interest at a rate based on the one-month LIBOR rate plus 5.00%. Interest expense related to this note totaled $1 million for both the three months ended September 30, 2013 and 2012 and $3 million for both the nine months ended September 30, 2013 and 2012.
	•	Receivables from affiliates are measured at historical cost and primarily consisted of notes receivable for cash loaned to EFH Corp. for debt principal and interest payments and other general corporate purposes of EFH Corp. as discussed above. TCEH reviews economic conditions, counterparty credit scores and historical payment activity to assess the overall collectability of its affiliated receivables. There were no credit loss allowances at September 30, 2013 and December 31, 2012.
	•	A subsidiary of EFH Corp. bills our subsidiaries for information technology, financial, accounting and other administrative services at cost. These charges, which are settled in cash and primarily reported in SG&A expenses, totaled $59 million and $61 million for the three months ended September 30, 2013 and 2012, respectively, and $176 million and $178 million for the nine months ended September 30, 2013 and 2012, respectively. Beginning in the fourth quarter 2012, TCEH reimburses a subsidiary of EFH Corp. for an allocated share of computer equipment purchased by the subsidiary. Amounts paid by TCEH in the nine months ended September 30, 2013 related to new computer equipment totaled $6 million and were accounted for as an intangible asset to be amortized over the life of the equipment. Previously, the depreciation of such equipment was included in the administrative cost billings.
	•	Under Texas regulatory provisions, the trust fund for decommissioning the Comanche Peak nuclear generation facility is funded by a delivery fee surcharge billed to REPs by Oncor, as collection agent, and remitted monthly to TCEH for contribution to the trust fund with the intent that the trust fund assets, reported in investments in our balance sheet, will ultimately be sufficient to fund the actual future decommissioning liability, reported in noncurrent liabilities in our balance sheet. The delivery fee surcharges remitted to TCEH totaled $5 million for both the three months ended September 30, 2013 and 2012 and $12 million for both the nine months ended September 30, 2013 and 2012. Income and expenses associated with the trust fund and the decommissioning liability incurred by TCEH are offset by a net change in a receivable/payable that ultimately will be settled through changes in Oncor's delivery fee rates. At September 30, 2013 and December 31, 2012, the excess of the trust fund balance over the decommissioning liability resulted in a payable totaling $352 million and $284 million, respectively, reported in other noncurrent liabilities.
	•	EFH Corp. files consolidated federal income tax and Texas state margin tax returns that include our results; however, under a tax sharing agreement, our federal income tax and Texas margin tax expense and related balance sheet amounts, including income taxes payable to or receivable from EFH Corp., are recorded as if we file our own corporate income tax return. As of September 30, 2013, we had current income tax receivables of $7 million and noncurrent income tax liabilities of $723 million payable to EFH Corp. As of December 31, 2012, we had current income tax liabilities of $31 million payable to EFH Corp. (see Note 12). We made tax payments to EFH Corp. of $134 million and $83 million for the nine months ended September 30, 2013 and 2012, respectively. The 2013 payment included $84 million related to the 1997 through 2002 IRS appeals settlement.
	•	Certain transmission and distribution utilities in Texas have requirements in place to assure adequate creditworthiness of any REP to support the REP's obligation to collect securitization bond-related (transition) charges on behalf of the utility. Under these requirements, 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 September 30, 2013 and December 31, 2012, TCEH had posted letters of credit in the amount of $10 million and $11 million, respectively, for the benefit of Oncor.
	•	Oncor and Texas Holdings agreed to the terms of a stipulation with major interested parties to resolve all outstanding issues in the PUCT review related to the Merger. As part of this stipulation, TCEH would be required to post a letter of credit in an amount equal to $170 million to secure its payment obligations to Oncor in the event, which has not occurred, two or more rating agencies downgrade Oncor's credit rating below investment grade.
	•	In 2007, TCEH entered into the TCEH Senior Secured Facilities with syndicates of financial institutions and other lenders. These syndicates included affiliates of GS Capital Partners, which is a member of the Sponsor Group. Affiliates of each member of the Sponsor Group have from time to time engaged in commercial banking transactions with us and/or provided financial advisory services to us, in each case in the normal course of business.
	•	Affiliates of GS Capital Partners are parties to certain commodity and interest rate hedging transactions with us in the normal course of business.
	•	Affiliates of the Sponsor Group have sold or acquired, and in the future may sell or acquire, debt or debt securities issued by us in open market transactions or through loan syndications.
	•	As a result of debt repurchase and exchange transactions in 2009 through 2011, EFH Corp. and EFIH held TCEH debt securities as follows (principal amounts):
		30-Sep-13		31-Dec-12
	TCEH Senior Notes:
	Held by EFH Corp.	$	284	$	284
	Held by EFIH	79		79
	TCEH Term Loan Facilities:
	Held by EFH Corp.	19		19
	Total	$	382	$	382
	Interest expense on the notes totaled $10 million for both the three months ended September 30, 2013 and 2012 and $29 million for both the nine months ended September, 30, 2013 and 2012.
	See Notes 5 and 6 for guarantees and push-down of certain EFH Corp. debt and Note 10 for allocation of EFH Corp. pension and OPEB costs to us.

Supplementary_Financial_Inform

Supplementary Financial Information	9 Months Ended
	Sep. 30, 2013
Supplementary Financial Information [Abstract]	'
Supplementary Financial Information	'
	SUPPLEMENTARY FINANCIAL INFORMATION
	Other Income
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Other income:
	Consent fee related to novation of hedge positions between counterparties	$	—		$	—		$	—		$	6
	Insurance/litigation settlements	—			—			2			2
	All other	1			2			5			4
	Total other income	$	1		$	2		$	7		$	12
	Other deductions:
	Impairment of mineral interests	$	—		$	24		$	—		$	24
	Other asset impairments	3			—			3			—
	Counterparty contract settlement	—			4			—			4
	Other	5			2			9			9
	Total other deductions	$	8		$	30		$	12		$	37
	Interest Expense and Related Charges
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Interest paid/accrued (including net amounts settled/accrued under interest rate swaps)	$	688		$	647		$	2,042		$	1,938
	Interest related to pushed down debt	1			19			5			57
	Interest payable with additional toggle notes (Note 5)	—			47			—			136
	Unrealized mark-to-market net (gain) loss on interest rate swaps	(413		)	20			(899		)	16
	Amortization of interest rate swap losses at dedesignation of hedge accounting	2			2			6			7
	Amortization of fair value debt discounts resulting from purchase accounting	3			3			8			8
	Amortization of debt issuance, amendment and extension costs and discounts	64			45			195			137
	Capitalized interest	(5		)	(11		)	(19		)	(31		)
	Total interest expense and related charges	$	340		$	772		$	1,338		$	2,268
	Restricted Cash
	At September 30, 2013 and December 31, 2012, all restricted cash on the balance sheet related to TCEH's Letter of Credit Facility (see Note 5).
	Inventories by Major Category
		30-Sep-13			31-Dec-12
	Materials and supplies	$	216		$	201
	Fuel stock	155			168
	Natural gas in storage	29			24
	Total inventories	$	400		$	393
	Investments
		30-Sep-13			31-Dec-12
	Nuclear plant decommissioning trust	$	737		$	654
	Assets related to employee benefit plans, including employee savings programs, net of distributions	1			8
	Land	40			41
	Miscellaneous other	9			7
	Total investments	$	787		$	710
	Nuclear Decommissioning Trust — Investments in a trust that will be used to fund the costs to decommission the Comanche Peak nuclear generation plant are carried at fair value. Decommissioning costs are being recovered from Oncor's customers as a delivery fee surcharge over the life of the plant and deposited by TCEH in the trust fund. Income and expense associated with the trust fund and the decommissioning liability are offset by a corresponding change in a receivable/payable (currently a payable reported in noncurrent liabilities) that will ultimately be settled through changes in Oncor's delivery fees rates (see Note 11). A summary of investments in the fund follows:
		30-Sep-13
		Cost (a)			Unrealized gain			Unrealized loss			Fair market
											value
	Debt securities (b)	$	261		$	9		$	(4	)	$	266
	Equity securities (c)	252			227			(8		)	471
	Total	$	513		$	236		$	(12	)	$	737
		31-Dec-12
		Cost (a)			Unrealized gain			Unrealized loss			Fair market
											value
	Debt securities (b)	$	246		$	16		$	(1	)	$	261
	Equity securities (c)	245			161			(13		)	393
	Total	$	491		$	177		$	(14	)	$	654
	____________
	(a)	Includes realized gains and losses on securities sold.
	(b)	The investment objective for debt securities is to invest in a diversified tax efficient portfolio with an overall portfolio rating of AA or above as graded by S&P or Aa2 by Moody's Investors Services, Inc. The debt securities are heavily weighted with municipal bonds. The debt securities had an average coupon rate of 3.97% and 4.38% at September 30, 2013 and December 31, 2012, respectively, and an average maturity of 6 years at both September 30, 2013 and December 31, 2012.
	(c)	The investment objective for equity securities is to invest tax efficiently and to match the performance of the S&P 500 Index.
	Debt securities held at September 30, 2013 mature as follows: $103 million in one to five years, $58 million in five to ten years and $105 million after ten years.
	The following table summarizes proceeds from sales of available-for-sale securities and the related realized gains and losses from such sales.
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
Realized gains	$	1		$	—		$	2		$	1
Realized losses	$	(3	)	$	(1	)	$	(3	)	$	(2	)
Proceeds from sales of securities	$	23		$	25		$	128		$	56
Investments in securities	$	(28	)	$	(30	)	$	(140	)	$	(68	)
Property, Plant and Equipment
At September 30, 2013 and December 31, 2012, property, plant and equipment of $18.0 billion and $18.6 billion, respectively, is stated net of accumulated depreciation and amortization of $7.7 billion and $6.8 billion, respectively.
Asset Retirement and Mining Reclamation Obligations
These liabilities primarily relate to nuclear generation plant decommissioning, land reclamation related to lignite mining, removal of lignite/coal-fueled plant ash treatment facilities and generation plant asbestos removal and disposal costs. There is no earnings impact with respect to changes in the nuclear plant decommissioning liability, as all costs are recoverable through the regulatory process as part of Oncor's delivery fees.
The following table summarizes the changes to these obligations, reported in other current liabilities and other noncurrent liabilities and deferred credits in the balance sheet, for the nine months ended September 30, 2013:
	Nuclear Plant Decommissioning			Mining Land Reclamation			Other			Total
Liability at December 31, 2012	$	368		$	135		$	33		$	536
Additions:
Accretion	17			23			1			41
Reductions:
Payments	—			(72		)	(1		)	(73		)
Liability at September 30, 2013	385			86			33			504
Less amounts due currently	—			(60		)	—			(60		)
Noncurrent liability at September 30, 2013	$	385		$	26		$	33		$	444
Other Noncurrent Liabilities and Deferred Credits
The balance of other noncurrent liabilities and deferred credits consists of the following:
	30-Sep-13			31-Dec-12
Uncertain tax positions (including accrued interest)	$	384		$	1,250
Asset retirement and mining reclamation obligations	444			452
Unfavorable purchase and sales contracts	596			620
Nuclear decommissioning cost over-recovery (Note 11)	352			284
Other, including retirement and other employee benefits	17			37
Total other noncurrent liabilities and deferred credits	$	1,793		$	2,643
Liability for Uncertain Tax Positions — In May 2013, EFH Corp. received approval from the Joint Committee on Taxation of the IRS appeals settlement of all issues arising from the 1997 through 2002 IRS audit. The settlement also affected federal and state returns for periods subsequent to 2002. In the second quarter 2013, we reduced the liability for uncertain tax positions to reflect the effects of the settlement, resulting in a $411 million reclassification to the accumulated deferred income tax liability and the recording of a $20 million income tax expense. Other effects included the recording of current federal income tax and state income tax liabilities to EFH Corp. of $78 million and $14 million, respectively, and a reduction of $392 million of the noncurrent federal income tax liability to EFH Corp., all under the tax sharing agreement (see Note 11). In the third quarter 2013, we recorded an additional $38 million tax benefit, with an offset to accumulated deferred income tax liability, related to the settlement.
In March 2013, EFH Corp. and the IRS agreed on terms to resolve disputed adjustments related to the IRS audit for the years 2003 through 2006, which was concluded in June 2011. The IRS proposed a significant number of adjustments to the originally filed returns for such years. The adjustments relate to one significant accounting method issue and other less significant issues. In the first quarter 2013, we reduced the liability for uncertain tax positions to reflect the terms of the agreement, resulting in a net reduction of the liability for uncertain tax positions totaling $794 million. This reduction consisted of a $685 million reclassification to a noncurrent affiliate tax sharing liability and a net adjustment of $109 million ($62 million after tax), largely representing a reversal of accrued interest and reported as an increase in income tax benefit. In addition, in accordance with the provisions of the tax sharing agreement with EFH Corp., amounts previously recorded as accumulated deferred income taxes totaling $430 million were reclassified to the affiliate tax sharing liability, the total amount of which is not expected to be settled within the next twelve months.
Unfavorable Purchase and Sales Contracts – The amortization of unfavorable purchase and sales contracts totaled $6 million for both the three months ended September 30, 2013 and 2012 and $19 million and $20 million for the nine months ended September 30, 2013 and 2012, respectively. See Note 3 for intangible assets related to favorable purchase and sales contracts.
The estimated amortization of unfavorable purchase and sales contracts for each of the next five fiscal years is as follows:
Year		Amount
2013		$	25
2014		$	24
2015		$	23
2016		$	23
2017		$	23
Supplemental Cash Flow Information
	Nine Months Ended September 30,
	2013			2012
Cash payments (receipts) related to:
Interest paid (a)	$	1,901		$	1,788
Capitalized interest	(19		)	(31		)
Interest paid (net of capitalized interest) (a)	$	1,882		$	1,757
Income taxes	$	134		$	83
Noncash investing and financing activities:
Effect of Parent's payment of interest, net of tax, on pushed down debt	$	21		$	30
Principal amount of TCEH Toggle Notes issued in lieu of cash interest	$	—		$	88
Construction expenditures (b)	$	62		$	52
Contribution related to EFH Corp. stock-based compensation	$	1		$	6
Debt assumed related to acquisition of combustion turbine trust interest	$	(45	)	$	—
Effect of push down of debt from parent	$	(420	)	$	—
Debt extension transactions	$	(340	)	$	—
____________
(a)	Net of amounts received under interest rate swap agreements.
(b)	Represents end-of-period accruals.

Supplemental_Guarantor_Condens

Supplemental Guarantor Condensed Financial Information	9 Months Ended
	Sep. 30, 2013
Supplemental Guarantor Condensed Financial Information [Abstract]	'
Supplemental Guarantor Condensed Financial Information	'
	SUPPLEMENTAL GUARANTOR CONDENSED FINANCIAL INFORMATION
	At September 30, 2013 TCEH and TCEH Finance, as Co-Issuers, had outstanding $5.237 billion aggregate principal amount of 10.25% Senior Notes Due 2015, 10.25% Senior Notes due 2015 Series B and Toggle Notes (collectively, the TCEH Senior Notes) and $1.571 billion aggregate principal amount of 15% Senior Secured Second Lien Notes due 2021 and 15% Senior Secured Second Lien Notes due 2021 (Series B) (collectively, the TCEH Senior Secured Second Lien Notes). The TCEH Senior Notes and the TCEH Senior Secured Second Lien Notes are unconditionally guaranteed by EFCH and by each subsidiary (all 100% owned by TCEH) that guarantees the TCEH Senior Secured Facilities (collectively, the Guarantors). The guarantees issued by the Guarantors are full and unconditional, joint and several guarantees of the TCEH Senior Notes and the TCEH Senior Secured Second Lien Notes. The guarantees of the TCEH Senior Notes rank equally with any senior unsecured indebtedness of the Guarantors and rank effectively junior to all of the secured indebtedness of the Guarantors to the extent of the assets securing that indebtedness. The guarantees of the TCEH Senior Secured Second Lien Notes rank equally in right of payment with all senior indebtedness of TCEH, are senior in right of payment to all existing or future unsecured debt of TCEH to the extent of the value of the TCEH Collateral (after taking into account any first-priority liens on the TCEH Collateral) and are senior in right of payment to any future subordinated debt of TCEH. These notes are effectively subordinated to TCEH's obligations under the TCEH Senior Secured Facilities, the TCEH Senior Secured Notes and TCEH's commodity and interest rate hedges that are secured by a first-priority lien on the TCEH Collateral and any future obligations subject to first-priority liens on the TCEH Collateral, to the extent of the value of the TCEH Collateral (see Note 5). All other subsidiaries of EFCH, either direct or indirect, do not guarantee the TCEH Senior Notes or TCEH Senior Secured Second Lien Notes (collectively the Non-Guarantors). The indentures governing the TCEH Senior Notes and the TCEH Senior Secured Second Lien Notes contain certain restrictions, subject to certain exceptions, on EFCH's ability to pay dividends or make investments. See Note 7.
	The following tables have been prepared in accordance with Regulation S-X Rule 3-10, "Financial Statements of Guarantors and Issuers of Guaranteed Securities Registered or Being Registered" in order to present the condensed consolidating statements of income for the three and nine months ended September 30, 2013 and 2012 and of cash flows for the nine months ended September 30, 2013 and 2012 of EFCH (Parent), TCEH (Issuer), the Guarantors and the Non-Guarantors and the condensed consolidating balance sheets at September 30, 2013 and December 31, 2012 of the Parent, Issuer, the Guarantors and the Non-Guarantors. Investments in consolidated subsidiaries are accounted for under the equity method. The presentations reflect the application of SEC Staff Accounting Bulletin Topic 5J, "Push Down Basis of Accounting Required in Certain Limited Circumstances," including the effects of the push down of $30 million and $62 million of the EFH Corp. 10.875% Notes and Toggle Notes to the Parent at September 30, 2013 and December 31, 2012, respectively, $388 million of the EFH Corp. 9.75% Notes and 10% Notes to the Parent at December 31, 2012, and the TCEH Senior Notes, TCEH Senior Secured Notes, TCEH Senior Secured Second Lien Notes and TCEH Senior Secured Facilities to the Other Guarantors at September 30, 2013 and December 31, 2012 (see Note 5 for further details of this debt, including the elimination of EFCH's guarantees of the EFH Corp. 9.75% Notes and 10% Notes in January 2013). TCEH Finance's sole function is to be the co-issuer of the certain TCEH debt securities; therefore, it has no other independent assets, liabilities or operations.
	EFCH received no dividends/distributions from its consolidated subsidiaries for the three or nine months ended September 30, 2013 and 2012.
	ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
	Condensed Consolidating Statements of Income (Loss)
	Three Months Ended September 30, 2013
	(millions of dollars)
		Parent			Issuer			Other			Non-			Eliminations			Consolidated
		Guarantor						Guarantors			guarantors
	Operating revenues	$	—		$	—		$	1,893		$	27		$	(27	)	$	1,893
	Fuel, purchased power costs and delivery fees	—			—			(852		)	—			—			(852		)
	Net gain from commodity hedging and trading activities	—			20			38			—			—			58
	Operating costs	—			—			(192		)	—			3			(189		)
	Depreciation and amortization	—			—			(332		)	1			—			(331		)
	Selling, general and administrative expenses	—			(14		)	(173		)	(11		)	23			(175		)
	Franchise and revenue-based taxes	—			—			(18		)	—			—			(18		)
	Other income	—			—			1			—			—			1
	Other deductions	—			—			(8		)	—			—			(8		)
	Interest income	—			62			206			—			(267		)	1
	Interest expense and related charges	(4		)	(541		)	(619		)	(4		)	828			(340		)
	Income (loss) before income taxes	(4		)	(473		)	(56		)	13			560			40
	Income tax (expense) benefit	1			165			46			(5		)	(190		)	17
	Equity earnings of subsidiaries	60			368			1			—			(429		)	—
	Net income (loss)	57			60			(9		)	8			(59		)	57
	Other comprehensive income	1			1			—			—			(1		)	1
	Comprehensive income (loss)	$	58		$	61		$	(9	)	$	8		$	(60	)	$	58
	ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
	Condensed Consolidating Statements of Income (Loss)
	Three Months Ended September 30, 2012
	(millions of dollars)
		Parent			Issuer			Other			Non-			Eliminations			Consolidated
		Guarantor						Guarantors			guarantors
	Operating revenues	$	—		$	—		$	1,752		$	3		$	(3	)	$	1,752
	Fuel, purchased power costs and delivery fees	—			—			(850		)	—			—			(850		)
	Net gain (loss) from commodity hedging and trading activities	—			(98		)	95			—			—			(3		)
	Operating costs	—			—			(201		)	—			—			(201		)
	Depreciation and amortization	—			—			(328		)	—			—			(328		)
	Selling, general and administrative expenses	—			(4		)	(172		)	(1		)	3			(174		)
	Franchise and revenue-based taxes	—			—			(19		)	—			—			(19		)
	Other income	—			—			2			—			—			2
	Other deductions	—			—			(30		)	—			—			(30		)
	Interest income	—			91			232			—			(313		)	10
	Interest expense and related charges	(24		)	(982		)	(606		)	(2		)	842			(772		)
	Loss before income taxes	(24		)	(993		)	(125		)	—			529			(613		)
	Income tax benefit	8			347			54			—			(181		)	228
	Equity earnings (losses) of subsidiaries	(369		)	277			—			—			92			—
	Net loss	(385		)	(369		)	(71		)	—			440			(385		)
	Other comprehensive income	1			1			—			—			(1		)	1
	Comprehensive loss	$	(384	)	$	(368	)	$	(71	)	$	—		$	439		$	(384	)
	ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
	Condensed Consolidating Statements of Income (Loss)
	Nine Months Ended September 30, 2013
	(millions of dollars)
		Parent			Issuer			Other			Non-			Eliminations			Consolidated
		Guarantor						Guarantors			guarantors
	Operating revenues	$	—		$	—		$	4,572		$	59		$	(59	)	$	4,572
	Fuel, purchased power costs and delivery fees	—			—			(2,175		)	—			—			(2,175		)
	Net gain (loss) from commodity hedging and trading activities	—			(3		)	32			—			—			29
	Operating costs	—			—			(690		)	—			5			(685		)
	Depreciation and amortization	—			—			(1,011		)	(1		)	—			(1,012		)
	Selling, general and administrative expenses	—			(49		)	(481		)	(25		)	53			(502		)
	Franchise and revenue-based taxes	—			—			(51		)	—			—			(51		)
Other income	—			—			7			—			—			7
Other deductions	—			—			(12		)	—			—			(12		)
Interest income	1			182			591			—			(769		)	5
Interest expense and related charges	(15		)	(1,920		)	(1,842		)	(8		)	2,447			(1,338		)
Income (loss) before income taxes	(14		)	(1,790		)	(1,060		)	25			1,677			(1,162		)
Income tax (expense) benefit	7			630			420			(9		)	(572		)	476
Equity earnings (losses) of subsidiaries	(679		)	481			1			—			197			—
Net income (loss)	(686		)	(679		)	(639		)	16			1,302			(686		)
Other comprehensive income	5			5			—			—			(5		)	5
Comprehensive income (loss)	$	(681	)	$	(674	)	$	(639	)	$	16		$	1,297		$	(681	)
ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
Condensed Consolidating Statements of Income (Loss)
Nine Months Ended September 30, 2012
(millions of dollars)
	Parent			Issuer			Other			Non-			Eliminations			Consolidated
	Guarantor						Guarantors			guarantors
Operating revenues	$	—		$	—		$	4,358		$	8		$	(8	)	$	4,358
Fuel, purchased power costs and delivery fees	—			—			(2,153		)	—			—			(2,153		)
Net gain from commodity hedging and trading activities	—			173			56			—			—			229
Operating costs	—			—			(636		)	—			—			(636		)
Depreciation and amortization	—			—			(992		)	—			—			(992		)
Selling, general and administrative expenses	—			(4		)	(486		)	(2		)	8			(484		)
Franchise and revenue-based taxes	—			—			(55		)	—			—			(55		)
Other income	—			6			6			—			—			12
Other deductions	—			—			(36		)	(1		)	—			(37		)
Interest income	—			242			593			—			(799		)	36
Interest expense and related charges	(69		)	(2,794		)	(1,778		)	(5		)	2,378			(2,268		)
Loss before income taxes	(69		)	(2,377		)	(1,123		)	—			1,579			(1,990		)
Income tax benefit	23			829			379			—			(539		)	692
Equity earnings (losses) of subsidiaries	(1,252		)	296			—			—			956			—
Net loss	(1,298		)	(1,252		)	(744		)	—			1,996			(1,298		)
Other comprehensive income	5			5			—			—			(5		)	5
Comprehensive loss	$	(1,293	)	$	(1,247	)	$	(744	)	$	—		$	1,991		$	(1,293	)
ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
Condensed Consolidating Statements of Cash Flows
Nine Months Ended September 30, 2013
(millions of dollars)
	Parent/			Issuer			Other			Non-			Eliminations			Consolidated
	Guarantor						Guarantors			guarantors
Cash provided by (used in) operating activities	$	(8	)	$	(1,764	)	$	1,736		$	(85	)	$	—		$	(121	)
Cash flows – financing activities:
Notes/advances due to affiliates	11			1,913			—			—			(1,920		)	4
Repayments/repurchases of long-term debt	(3		)	(64		)	(27		)	—			—			(94		)
Net short-term borrowings under accounts receivable securitization program	—			—			—			90			—			90
Contributions from noncontrolling interests	—			—			—			3			—			3
Other, net	—			—			—			(10		)	—			(10		)
Cash provided by (used in) financing activities	8			1,849			(27		)	83			(1,920		)	(7		)
Cash flows – investing activities:
Capital expenditures	—			—			(349		)	(4		)	—			(353		)
Nuclear fuel purchases	—			—			(59		)	—			—			(59		)
Notes due from affiliates	—			—			(1,222		)	—			1,920			698
Purchase of right to use certain computer-related assets from parent	—			—			(6		)	—			—			(6		)
Proceeds from sales of assets	—			—			3			—			—			3
Acquisition of combustion turbine trust interest	—			—			(40		)	—			—			(40		)
Purchases of environmental allowances and credits	—			—			(13		)	—			—			(13		)
Proceeds from sales of nuclear decommissioning trust fund securities	—			—			128			—			—			128
Investments in nuclear decommissioning trust fund securities	—			—			(140		)	—			—			(140		)
Other, net	—			—			(3		)	—			—			(3		)
Cash provided by (used in) investing activities	—			—			(1,701		)	(4		)	1,920			215
Net change in cash and cash equivalents	—			85			8			(6		)	—			87
Cash and cash equivalents – beginning balance	—			1,115			15			45			—			1,175
Cash and cash equivalents – ending balance	$	—		$	1,200		$	23		$	39		$	—		$	1,262
ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
Condensed Consolidating Statements of Cash Flows
Nine Months Ended September 30, 2012
(millions of dollars)
	Parent/			Issuer			Other			Non-			Eliminations			Consolidated
	Guarantor						Guarantors			guarantors
Cash provided by (used in) operating activities	$	(7	)	$	(471	)	$	885		$	(78	)	$	—		$	329
Cash flows – financing activities:
Notes due to affiliates	11			1,029			—			—			(1,040		)	—
Repayments/repurchases of long-term debt	(4		)	—			(26		)	—			—			(30		)
Net short-term borrowings under accounts receivable securitization program	—			—			—			80			—			80
Decrease in other short-term borrowings	—			(385		)	—			—			—			(385		)
Decrease in income tax-related note payable to Oncor	—			—			(20		)	—			—			(20		)
Settlement of reimbursement agreements with Oncor	—			—			(159		)	—			—			(159		)
Contributions from noncontrolling interests	—			—			—			6			—			6
Sale/leaseback of equipment	—			—			15			—			—			15
Cash provided by (used in) financing activities	7			644			(190		)	86			(1,040		)	(493		)
Cash flows – investing activities:
Capital expenditures	—			—			(491		)	(7		)	—			(498		)
Nuclear fuel purchases	—			—			(155		)	—			—			(155		)
Notes/loans due from affiliates	—			—			(118		)	—			1,040			922
Proceeds from sales of assets	—			—			1			—			—			1
Changes in restricted cash	—			—			112			—			—			112
Purchases of environmental allowances and credits	—			—			(19		)	—			—			(19		)
Proceeds from sales of nuclear decommissioning trust fund securities	—			—			56			—			—			56
Investments in nuclear decommissioning trust fund securities	—			—			(68		)	—			—			(68		)
Other, net	—			—			2			—			—			2
Cash provided by (used in) investing activities	—			—			(680		)	(7		)	1,040			353
Net change in cash and cash equivalents	—			173			15			1			—			189
Cash and cash equivalents – beginning balance	—			87			23			10			—			120
Cash and cash equivalents – ending balance	$	—		$	260		$	38		$	11		$	—		$	309
ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
Condensed Consolidating Balance Sheets
30-Sep-13
(millions of dollars)
	Parent			Issuer			Other			Non-guarantors			Eliminations			Consolidated
	Guarantor						Guarantors
ASSETS
Current assets:
Cash and cash equivalents	$	—		$	1,200		$	23		$	39		$	—		$	1,262
Advances to affiliates	—			—			74			—			(74		)	—
Trade accounts receivable – net	—			1			315			574			(94		)	796
Income taxes receivable	7			—			84			—			(84		)	7
Accounts receivable from affiliates	—			13			—			5			(18		)	—
Inventories	—			—			400			—			—			400
Commodity and other derivative contractual assets	—			726			247			—			—			973
Accumulated deferred income taxes	3			—			—			3			(6		)	—
Margin deposits related to commodity positions	—			—			21			—			—			21
Other current assets	—			2			32			—			—			34
Total current assets	10			1,942			1,196			621			(276		)	3,493
Restricted cash	—			947			—			—			—			947
Investments	(10,467		)	23,885			867			9			(13,507		)	787
Property, plant and equipment – net	—			—			17,760			201			—			17,961
Advances to affiliates	—			—			9,972			—			(9,972		)	—
Goodwill	—			4,952			—			—			—			4,952
Identifiable intangible assets – net	—			—			1,736			5			(5		)	1,736
Commodity and other derivative contractual assets	—			147			12			—			—			159
Accumulated deferred income taxes	—			490			—			3			(493		)	—
Other noncurrent assets, principally unamortized amendment/issuance costs	—			834			849			7			(831		)	859
Total assets	$	(10,457	)	$	33,197		$	32,392		$	846		$	(25,084	)	$	30,894
LIABILITIES AND MEMBERSHIP INTERESTS
Current liabilities:
Short-term borrowings	$	—		$	2,054		$	2,054		$	172		$	(2,054	)	$	2,226
Notes/advances from affiliates	1			10,045			—			—			(10,046		)	—
Long-term debt due currently	11			—			10			11			—			32
Trade accounts payable	—			5			348			95			(94		)	354
Trade accounts and other payables to affiliates	—			—			223			—			(18		)	205
Notes payable to parent	92			—			—			—			—			92
Commodity and other derivative contractual liabilities	—			413			181			—			—			594
ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
Condensed Consolidating Balance Sheets
30-Sep-13
(millions of dollars)
	Parent			Issuer			Other			Non-guarantors			Eliminations			Consolidated
	Guarantor						Guarantors
Margin deposits related to commodity positions	$	—		$	335		$	18		$	—		$	—		$	353
Accumulated deferred income taxes	—			3			39			—			(6		)	36
Accrued income taxes payable to parent	—			70			—			14			(84		)	—
Accrued taxes other than income	—			—			95			—			—			95
Accrued interest	3			528			401			1			(401		)	532
Other current liabilities	—			—			219			—			—			219
Total current liabilities	107			13,453			3,588			293			(12,703		)	4,738
Accumulated deferred income taxes	84			—			2,782			—			481			3,347
Commodity and other derivative contractual liabilities	—			779			3			—			—			782
Notes or other liabilities due affiliates	—			—			2			—			—			2
Long-term debt held by affiliates	—			382			—			—			—			382
Long-term debt, less amounts due currently	92			29,604			28,704			22			(28,652		)	29,770
Affiliate tax sharing liability	—			(571		)	1,294			—			—			723
Other noncurrent liabilities and deferred credits	8			17			1,774			—			(6		)	1,793
Total liabilities	291			43,664			38,147			315			(40,880		)	41,537
EFCH membership interests	(10,748		)	(10,467		)	(5,755		)	426			15,796			(10,748		)
Noncontrolling interests in subsidiaries	—			—			—			105			—			105
Total membership interests	(10,748		)	(10,467		)	(5,755		)	531			15,796			(10,643		)
Total liabilities and membership interests	$	(10,457	)	$	33,197		$	32,392		$	846		$	(25,084	)	$	30,894
ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
Condensed Consolidating Balance Sheets
31-Dec-12
(millions of dollars)
	Parent			Issuer			Other			Non-guarantors			Eliminations			Consolidated
	Guarantor						Guarantors
ASSETS
Current assets:
Cash and cash equivalents	$	—		$	1,115		$	15		$	45		$	—		$	1,175
Advances to affiliates	—			—			36			—			(36		)	—
Trade accounts receivable – net	—			2			360			445			(97		)	710
Notes receivable from parent	—			698			—			—			—			698
Income taxes receivable	—			—			410			—			(410		)	—
Accounts receivable from affiliates	—			95			—			—			(95		)	—
Inventories	—			—			393			—			—			393
Commodity and other derivative contractual assets	—			1,127			336			—			—			1,463
Accumulated deferred income taxes	3			—			—			3			(6		)	—
Margin deposits related to commodity positions	—			—			71			—			—			71
Other current assets	—			—			112			8			—			120
Total current assets	3			3,037			1,733			501			(644		)	4,630
Restricted cash	—			947			—			—			—			947
Investments	(9,794		)	23,382			747			9			(13,634		)	710
Property, plant and equipment – net	—			—			18,422			134			—			18,556
Advances to affiliates	—			—			8,794			—			(8,794		)	—
Goodwill	—			4,952			—			—			—			4,952
Identifiable intangible assets – net	—			—			1,781			—			—			1,781
Commodity and other derivative contractual assets	—			575			11			—			—			586
Accumulated deferred income taxes	—			828			—			3			(831		)	—
Other noncurrent assets, principally unamortized amendment/issuance costs	4			781			806			3			(783		)	811
Total assets	$	(9,787	)	$	34,502		$	32,294		$	650		$	(24,686	)	$	32,973
LIABILITIES AND EQUITY
Current liabilities:
Short-term borrowings	$	—		$	2,054		$	2,054		$	82		$	(2,054	)	$	2,136
Notes/advances from affiliates	—			8,830			—			—			(8,830		)	—
Long-term debt due currently	11			64			21			—			—			96
Trade accounts payable	—			2			387			97			(97		)	389
Trade accounts and other payables to affiliates	—			—			231			3			(95		)	139
Notes payable to parent/affiliate	80			—			1			—			—			81
Commodity and other derivative contractual liabilities	—			610			284			—			—			894
ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
Condensed Consolidating Balance Sheets
31-Dec-12
(millions of dollars)
	Parent			Issuer			Other			Non-guarantors			Eliminations			Consolidated
	Guarantor						Guarantors
Margin deposits related to commodity positions	$	—		$	596		$	4		$	—		$	—		$	600
Accumulated deferred income taxes	—			3			52			—			(6		)	49
Accrued income taxes payable to parent	2			433			—			6			(410		)	31
Accrued taxes other than income	—			—			17			—			—			17
Accrued interest	18			389			281			—			(281		)	407
Other current liabilities	1			4			253			—			(3		)	255
Total current liabilities	112			12,985			3,585			188			(11,776		)	5,094
Accumulated deferred income taxes	79			—			3,569			—			111			3,759
Commodity and other derivative contractual liabilities	—			1,539			17			—			—			1,556
Notes or other liabilities due affiliates	—			—			5			—			—			5
Long-term debt held by affiliates	—			382			—			—			—			382
Long-term debt, less amounts due currently	515			29,355			28,486			—			(28,428		)	29,928
Other noncurrent liabilities and deferred credits	13			36			2,594			—			—			2,643
Total liabilities	719			44,297			38,256			188			(40,093		)	43,367
EFCH shareholder's equity	(10,506		)	(9,795		)	(5,962		)	350			15,407			(10,506		)
Noncontrolling interests in subsidiaries	—			—			—			112			—			112
Total equity	(10,506		)	(9,795		)	(5,962		)	462			15,407			(10,394		)
Total liabilities and equity	$	(9,787	)	$	34,502		$	32,294		$	650		$	(24,686	)	$	32,973

Business_And_Significant_Accou1

Business And Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The condensed consolidated financial statements have been prepared in accordance with US GAAP and on the same basis as the audited financial statements included in our 2012 Form 10-K. Adjustments (consisting of normal recurring accruals) necessary for a fair presentation of the results of operations and financial position have been included therein. All intercompany items and transactions have been eliminated in consolidation. Any acquisitions of outstanding debt for cash, including notes that had been issued in lieu of cash interest, are presented in the financing activities section of the statement of cash flows. Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with US GAAP have been omitted pursuant to the rules and regulations of the SEC. Because the condensed consolidated interim financial statements do not include all of the information and footnotes required by US GAAP, they should be read in conjunction with the audited financial statements and related notes included in our 2012 Form 10-K. The results of operations for an interim period may not give a true indication of results for a full year. All dollar amounts in the financial statements and tables in the notes are stated in millions of US dollars unless otherwise indicated.
Use of Estimates	'
	Use of Estimates
	Preparation of financial statements requires 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.

Consolidation_Of_Variable_Inte1

Consolidation Of Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2013
Consolidation Of Variable Interest Entities [Abstract]	'
Schedule of carrying amounts and classifications of the assets and liabilities related to our consolidated VIEs	'
	The carrying amounts and classifications of the assets and liabilities related to our consolidated VIEs are as follows:
	Assets:	September 30,		31-Dec-12		Liabilities:	September 30,		31-Dec-12
		2013					2013
	Cash and cash equivalents	$	37	$	43	Short-term borrowings	$	172	$	82
	Accounts receivable	573		445		Trade accounts payable	1		1
	Property, plant and equipment	138		134		Other current liabilities	13		7
	Other assets, including $3 million and $12 million of current assets	12		16
	Total assets	$	760	$	638	Total liabilities	$	186	$	90

Goodwill_And_Identifiable_Inta1

Goodwill And Identifiable Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Goodwill	'
	The following table provides information regarding our goodwill balance, which arose in connection with accounting for the Merger. There were no changes to the goodwill balance for the three and nine months ended September 30, 2013. None of the goodwill is being deducted for tax purposes.
	Goodwill before impairment charges	$	18,322
	Accumulated impairment charges	(13,370		)
	Balance at September 30, 2013 and December 31, 2012	$	4,952
Schedule of identifiable intangible assets reported in the balance sheet	'
	Identifiable intangible assets, including amounts that arose in connection with accounting for the Merger, are comprised of the following:
			30-Sep-13												31-Dec-12
	Identifiable Intangible Asset		Gross Carrying Amount				Accumulated Amortization				Net				Gross Carrying Amount				Accumulated Amortization		Net
	Retail customer relationship		$	463			$	396			$	67			$	463			$	378	$	85
	Favorable purchase and sales contracts		551				333				218				552				314		238
	Software and other computer-related assets		348				145				203				320				112		208
	Environmental allowances and credits		598				407				191				594				393		201
	Mining development costs		196				105				91				163				82		81
	Total identifiable intangible assets subject to amortization		$	2,156			$	1,386			770				$	2,092			$	1,279	813
	Retail trade name (not subject to amortization)										955										955
	Mineral interests (not currently subject to amortization)										11										13
	Total identifiable intangible assets										$	1,736									$	1,781
Schedule of amortization expense related to intangible assets (including income statement line item)	'
	Amortization expense related to identifiable intangible assets (including income statement line item) consisted of:
	Identifiable Intangible Asset		Income Statement Line		Three Months Ended September 30,								Nine Months Ended September 30,
					2013				2012				2013				2012
	Retail customer relationship		Depreciation and amortization		$	6			$	8			$	18			$	25
	Favorable purchase and sales contracts		Operating revenues/fuel, purchased power costs and delivery fees		6				5				19				20
	Software and other computer-related assets		Depreciation and amortization		14				9				33				24
	Environmental allowances and credits		Fuel, purchased power costs and delivery fees		5				6				11				15
	Mining development costs		Depreciation and amortization		8				7				23				20
	Total amortization expense				$	39			$	35			$	104			$	104
Schedule of estimated aggregate amortization expense of intangible assets for each of the next five fiscal years	'
	The estimated aggregate amortization expense of identifiable intangible assets for each of the next five fiscal years is as follows:
	Year		Estimated Amortization Expense
	2013		$	143
	2014		$	138
	2015		$	126
	2016		$	101
	2017		$	78

Trade_Accounts_Receivable_And_1

Trade Accounts Receivable And Accounts Receivable Securitization Program (Tables)	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Schedule of program fees	'
	Program fee amounts were as follows:
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Program fees	$	3		$	2		$	6		$	6
	Program fees as a percentage of average funding (annualized)	5.1		%	4.9		%	5.8		%	6.2		%
Schedule of activities from receivables company related to cash flows used by (provided to) originator under the program	'
	Activities of TXU Energy Receivables Company and its predecessor, TXU Receivables Company, were as follows:
		Nine Months Ended September 30,
		2013			2012
	Cash collections on accounts receivable	$	3,200		$	3,501
	Face amount of new receivables purchased (a)	(3,328		)	(3,571		)
	Discount from face amount of purchased receivables	29			8
	Program fees paid to financial institution	(6		)	(6		)
	Servicing fees paid for recordkeeping and collection services	—			(2		)
	Decrease in subordinated notes payable	(4		)	(10		)
	Increase in cash held	17			—
	Other — net	2			—
	Cash flows provided to originator under the program	$	(90	)	$	(80	)
Schedule of trade accounts receivable and allowance for uncollectible accounts receivable	'
	Trade Accounts Receivable
		30-Sep-13			31-Dec-12
	Wholesale and retail trade accounts receivable	$	813		$	719
	Allowance for uncollectible accounts	(17		)	(9		)
	Trade accounts receivable — reported in balance sheet, including $573 and $445 in pledged retail receivables	$	796		$	710
	Allowance for Uncollectible Accounts Receivable
		Nine Months Ended September 30,
		2013			2012
	Allowance for uncollectible accounts receivable at beginning of period	$	9		$	27
	Increase for bad debt expense	23			20
	Decrease for account write-offs	(15		)	(32		)
	Allowance for uncollectible accounts receivable at end of period	$	17		$	15

ShortTerm_Borrowings_And_LongT1

Short-Term Borrowings And Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2013
Debt and Capital Lease Obligations [Abstract]	'
Schedule of Line of Credit Facilities	'
	Credit facilities and related cash borrowings at September 30, 2013 are presented below. Available letter of credit capacity totaled $171 million at September 30, 2013 as discussed below. The facilities are all senior secured facilities of TCEH.
				30-Sep-13
	Facility	Maturity Date		Facility Limit				Letters of Credit				Cash Borrowings				Availability
	TCEH Revolving Credit Facility (a)	Oct-16		$	2,054			$	—			$	2,054			$	—
	TCEH Letter of Credit Facility (b)	October 2017 (b)		1,062				—				1,062				—
	Total TCEH			$	3,116			$	—			$	3,116			$	—
	___________
	(a)	Facility used for borrowings for general corporate purposes. Borrowings are classified as short-term borrowings. At September 30, 2013, borrowings under the facility bear interest at LIBOR plus 4.50%, and a commitment fee is payable quarterly in arrears at a rate per annum equal to 1.00% of the average daily unused portion of the facility. In January 2013, commitments previously maturing in 2013 were extended to 2016 as discussed below.
	(b)	Facility, $42 million of which matures in October 2014, used for issuing letters of credit for general corporate purposes, including, but not limited to, providing collateral support under hedging arrangements and other commodity transactions that are not secured by a first-lien interest in the assets of TCEH. The borrowings under this facility have been recorded by TCEH as restricted cash that supports issuances of letters of credit and are classified as long-term debt. At September 30, 2013, the restricted cash totaled $947 million, after reduction for a $115 million letter of credit drawn in 2009 related to an office building financing. At September 30, 2013, the restricted cash supports $776 million in letters of credit outstanding, leaving $171 million in available letter of credit capacity.
Schedule of Long-term Debt Instruments	'
	Long-Term Debt
	At September 30, 2013 and December 31, 2012, long-term debt consisted of the following:
		30-Sep-13				31-Dec-12
	TCEH
	Senior Secured Facilities:
	3.710% TCEH Term Loan Facilities maturing October 10, 2014 (a)(b)	$	3,809			$	3,809
	3.679% TCEH Letter of Credit Facility maturing October 10, 2014 (b)	42				42
	4.709% TCEH Term Loan Facilities maturing October 10, 2017 (a)(b)(c)	15,710				15,370
	4.679% TCEH Letter of Credit Facility maturing October 10, 2017 (b)	1,020				1,020
	11.5% Fixed Senior Secured Notes due October 1, 2020	1,750				1,750
	15% Fixed Senior Secured Second Lien Notes due April 1, 2021	336				336
	15% Fixed Senior Secured Second Lien Notes due April 1, 2021, Series B	1,235				1,235
	10.25% Fixed Senior Notes due November 1, 2015 (c)	2,046				2,046
	10.25% Fixed Senior Notes due November 1, 2015, Series B (c)	1,442				1,442
	10.50 / 11.25% Senior Toggle Notes due November 1, 2016	1,749				1,749
	Pollution Control Revenue Bonds:
	Brazos River Authority:
	5.40% Fixed Series 1994A due May 1, 2029	39				39
	7.70% Fixed Series 1999A due April 1, 2033	111				111
	6.75% Fixed Series 1999B due September 1, 2034, remarketing date April 1, 2013 (d)	—				16
	7.70% Fixed Series 1999C due March 1, 2032	50				50
	8.25% Fixed Series 2001A due October 1, 2030	71				71
	8.25% Fixed Series 2001D-1 due May 1, 2033	171				171
	0.089% Floating Series 2001D-2 due May 1, 2033 (e)	97				97
	0.210% Floating Taxable Series 2001I due December 1, 2036 (f)	62				62
	0.089% Floating Series 2002A due May 1, 2037 (e)	45				45
	6.75% Fixed Series 2003A due April 1, 2038, remarketing date April 1, 2013 (d)	—				44
	6.30% Fixed Series 2003B due July 1, 2032	39				39
	6.75% Fixed Series 2003C due October 1, 2038	52				52
	5.40% Fixed Series 2003D due October 1, 2029, remarketing date October 1, 2014 (d)	31				31
	5.00% Fixed Series 2006 due March 1, 2041	100				100
	Sabine River Authority of Texas:
	6.45% Fixed Series 2000A due June 1, 2021	51				51
	5.20% Fixed Series 2001C due May 1, 2028	70				70
	5.80% Fixed Series 2003A due July 1, 2022	12				12
	6.15% Fixed Series 2003B due August 1, 2022	45				45
	Trinity River Authority of Texas:
	6.25% Fixed Series 2000A due May 1, 2028	14				14
	Unamortized fair value discount related to pollution control revenue bonds (g)	(107		)		(112		)
	Other:
	7.48% Fixed Secured Facility Bonds with amortizing payments through January 2017	36				—
	7.46% Fixed Secured Facility Bonds with amortizing payments through January 2015	4				12
	7% Fixed Senior Notes due March 15, 2013	—				5
	Capital leases	56				64
	Other	3				3
	Unamortized discount	(110		)		(10		)
	Unamortized fair value discount (g)	—				(1		)
	Total TCEH	30,081				29,880
		30-Sep-13				31-Dec-12
	EFCH (parent entity)
	9.58% Fixed Notes due in annual installments through December 4, 2019 (h)	$	35			$	35
	8.254% Fixed Notes due in quarterly installments through December 31, 2021 (h)	35				39
	1.065% Floating Rate Junior Subordinated Debentures, Series D due January 30, 2037 (b)	1				1
	8.175% Fixed Junior Subordinated Debentures, Series E due January 30, 2037	8				8
	Unamortized fair value discount (g)	(6		)		(7		)
	Subtotal	73				76
	EFH Corp. debt pushed down (i)
	10% Fixed Senior Notes due January 15, 2020	—				330
	9.75% Fixed Senior Notes due October 15, 2019	—				58
	10.875% Fixed Senior Notes due November 1, 2017	16				32
	11.25 / 12.00% Senior Toggle Notes due November 1, 2017	14				30
	Subtotal — EFH Corp. debt pushed down	30				450
	Total EFCH (parent entity)	103				526
Total EFCH consolidated	30,184				30,406
Less amount due currently	(32		)		(96		)
Less amount held by affiliates (Note 11)	(382		)		(382		)
Total long-term debt	$	29,770			$	29,928
____________
(a)	Interest rate swapped to fixed on $18.140 billion principal amount of maturities through October 2014 and up to an aggregate $12.6 billion principal amount from October 2014 through October 2017.
(b)	Interest rates in effect at September 30, 2013.
(c)	As discussed below and in Note 11, principal amounts of notes/term loans totaling $382 million at both September 30, 2013 and December 31, 2012 were held by EFH Corp. and EFIH.
(d)	These series are in the multiannual interest rate mode and are subject to mandatory tender prior to maturity on the mandatory remarketing date. On such date, the interest rate and interest rate period will be reset for the bonds.
(e)	Interest rates in effect at September 30, 2013. These series are in a daily interest rate mode and are classified as long-term as they are supported by long-term irrevocable letters of credit.
(f)	Interest rate in effect at September 30, 2013. This series is in a weekly interest rate mode and is classified as long-term as it is supported by long-term irrevocable letters of credit.
(g)	Amount represents unamortized fair value adjustments recorded under purchase accounting.
(h)	EFCH's obligations with respect to these financings are guaranteed by EFH Corp. and secured on a first-priority basis by, among other things, an undivided interest in the Comanche Peak nuclear generation facility.
(i)	Represents 50% of the amount of these EFH Corp. securities guaranteed by, and pushed down to (pushed-down debt), EFCH (parent entity) per the discussion below under "Guarantees and Push Down of EFH Corp. Debt."
Schedule of securities guaranteed, principal amounts	'
	The following table presents an analysis of the total outstanding principal amount of EFH Corp. debt guaranteed by EFCH and EFIH at December 31, 2012 and September 30, 2013, respectively.
			31-Dec-12
	Securities Guaranteed (principal amounts)		Held by EFIH				Subject to Push Down				Not Merger-Related				Total Guaranteed			Debt Cancelled in 2013		Total Guaranteed September 30, 2013 (c)
	EFH Corp. 9.75% Senior Notes (a)		$	—			$	115			$	—			$	115		113		$	—
	EFH Corp. 10% Senior Notes (a)		—				661				400				1,061			1,058		—
	EFH Corp. 10.875% Senior Notes		1,685				64				—				1,749			1,715		33
	EFH Corp. 11.25/12.00% Senior Toggle Notes		3,441				60				—				3,501			3,474		27
	Subtotal		$	5,126			$	900			$	400			6,426			$	6,360	60
	TCEH Demand Notes (b)														698					—
	Total														$	7,124				$	60
Schedule of Interest Rate Derivatives	'
	The interest rate swap counterparties are secured on an equal and ratable basis by the same collateral pledged to the lenders under the TCEH Senior Secured Facilities and the TCEH Senior Secured Notes.
	The interest rate swaps have resulted in net gains (losses) reported in interest expense and related charges as follows:
		Three Months Ended September 30,								Nine Months Ended September 30,
		2013				2012				2013				2012
	Realized net loss	$	(160	)		$	(168	)		$	(466	)		$	(505	)
	Unrealized net gain (loss)	413				(20		)		899				(16		)
	Total	$	253			$	(188	)		$	433			$	(521	)
	TCEH Interest Rate Swap Transactions
	TCEH employs interest rate swaps to hedge exposure to its variable rate debt. As reflected in the table below, at September 30, 2013, TCEH has entered into the following series of interest rate swap transactions that effectively fix the interest rates at between 5.5% and 9.3%.
	Fixed Rates					Expiration Dates		Notional Amount
	5.5	%	-	9.30%		October 2013 through October 2014			$	18.14		billion (a)
	6.8	%	-	9.00%		October 2015 through October 2017			$	12.6		billion (b)
	___________
	(a)	Swaps related to an aggregate $1.6 billion principal amount of debt expired in 2013. Per the terms of the transactions, the notional amount of swaps entered into in 2011 grew by $1.280 billion in 2013, substantially offsetting the expired swaps.
	(b)	These swaps are effective from October 2014 through October 2017. The $12.6 billion notional amount of swaps includes $3 billion that expires in October 2015 with the remainder expiring in October 2017.

Equity_Tables

Equity (Tables)	9 Months Ended
	Sep. 30, 2013
Stockholders' Equity Note [Abstract]	'
Schedule of Stockholders Equity	'
	The following tables present the changes to membership interests/equity for the nine months ended September 30, 2013 and 2012.
	Nine Months Ended September 30, 2013
		EFCH Shareholder's Equity/Membership Interests
		Common			Retained			Membership			Accumulated			Noncontrolling			Total
		Stock			Earnings			Interests			Other			Interests			Equity
					(Deficit)						Comprehensive
											Income (Loss)
	Balance at December 31, 2012	$	7,665		$	(18,129	)	$	—		$	(42	)	$	112		$	(10,394	)
	Net loss	—			(526		)	(160		)	—			—			(686		)
	Net effect of cash flow hedges	—			—			—			5			—			5
	Investment by noncontrolling interests	—			—			—			—			3			3
	Effect of debt push-down from EFH Corp. (a)	434			—			3			—			—			437
	Dissolution of TXU Receivables Company	—			—			—			—			(10		)	(10		)
	Capital structure conversion	(8,099		)	18,655			(10,556		)	—			—			—
	Other				—			2			—			—			2
	Balance at September 30, 2013	$	—		$	—		$	(10,711	)	$	(37	)	$	105		$	(10,643	)
	Nine Months Ended September 30, 2012
		EFCH Shareholder's Equity
		Common			Retained			Accumulated			Noncontrolling			Total
		Stock			Earnings			Other			Interests			Equity
					(Deficit)			Comprehensive
								Income (Loss)
	Balance at December 31, 2011	$	7,351		$	(15,121	)	$	(49	)	$	103		$	(7,716	)
	Net loss	—			(1,298		)	—			—			(1,298		)
	Gain on settlement of reimbursement agreement with Oncor (Note 11)	2			—			—			—			2
	Effect of stock-based incentive compensation plans	6			—			—			—			6
	Net effect of cash flow hedges	—			—			5			—			5
	Investment by noncontrolling interests	—			—			—			6			6
	Effect of debt push-down from EFH Corp. (a)	30			—			—			—			30
	Other	(1		)	—			—			1			—
	Balance at September 30, 2012	$	7,388		$	(16,419	)	$	(44	)	$	110		$	(8,965	)
	_______________
	(a)	Represents the interest and income tax effects of debt pushed down from EFH Corp. (Note 5).

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Schedule of assets and liabilities measured at fair value on a recurring basis	'
	Assets and liabilities measured at fair value consisted of the following:
	30-Sep-13
		Level 1			Level 2				Level 3 (a)				Reclassification (b)				Total
	Assets:
	Commodity contracts	$	140		$	941			$	48			$	2			$	1,131
	Interest rate swaps	—			1				—				—				1
	Nuclear decommissioning trust – equity securities (c)	299			172				—				—				471
	Nuclear decommissioning trust – debt securities (c)	—			266				—				—				266
	Total assets	$	439		$	1,380			$	48			$	2			$	1,869
	Liabilities:
	Commodity contracts	$	129		$	26			$	52			$	2			$	209
	Interest rate swaps	—			—				1,167				—				1,167
	Total liabilities	$	129		$	26			$	1,219			$	2			$	1,376
	31-Dec-12
		Level 1			Level 2				Level 3 (a)				Total
	Assets:
	Commodity contracts	$	180		$	1,784			$	83			$	2,047
	Interest rate swaps	—			2				—				2
	Nuclear decommissioning trust – equity securities (c)	249			144				—				393
	Nuclear decommissioning trust – debt securities (c)	—			261				—				261
	Total assets	$	429		$	2,191			$	83			$	2,703
	Liabilities:
	Commodity contracts	$	208		$	121			$	54			$	383
	Interest rate swaps	—			2,067				—				2,067
	Total liabilities	$	208		$	2,188			$	54			$	2,450
	_______________
	(a)	See table below for description of Level 3 assets and liabilities.
	(b)	Fair values are determined on a contract basis, but certain contracts result in a current asset and a noncurrent liability, or vice versa, as presented in the balance sheet.
	(c)	The nuclear decommissioning trust investment is included in the investments line in the balance sheet. See Note 12.
Schedule of fair value of the Level 3 assets and liabilities by major contract type (all related to commodity contracts) and the significant unobservable inputs used in the valuations	'
	30-Sep-13
			Fair Value
	Contract Type (a)		Assets			Liabilities				Total				Valuation Technique		Significant Unobservable Input		Range (b)
	Electricity purchases and sales		$	5		$	(2	)		$	3			Valuation Model		Illiquid pricing locations (c)		$30 to $45/MWh
																Hourly price curve shape (d)		$20 to $70/MWh
	Electricity spread options		—			(19		)		(19		)		Option Pricing Model		Gas to power correlation (e)		45% to 100%
																Power volatility (f)		10% to 30%
	Electricity congestion revenue rights		37			(5		)		32				Market Approach (g)		Illiquid price differences between settlement points (h)		$0.00 to $30.00
	Coal purchases		1			(12		)		(11		)		Market Approach (g)		Illiquid price variances between mines (i)		$0.00 to $1.00
																Probability of default (j)		0% to 40%
																Recovery rate (k)		0% to 40%
	Interest rate swaps		—			(1,167		)		(1,167		)		Valuation Model		Nonperformance risk adjustment (l)		30% to 35%
	Other		5			(14		)		(9		)
	Total		$	48		$	(1,219	)		$	(1,171	)
	31-Dec-12
			Fair Value
	Contract Type (a)		Assets			Liabilities				Total				Valuation Technique		Significant Unobservable Input		Range (b)
	Electricity purchases and sales		$	5		$	(9	)		$	(4	)		Valuation Model		Illiquid pricing locations (c)		$20 to $40/MWh
																Hourly price curve shape (d)		$20 to $50/MWh
	Electricity spread options		34			(10		)		24				Option Pricing Model		Gas to power correlation (e)		20% to 90%
																Power volatility (f)		20% to 40%
	Electricity congestion revenue rights		41			(2		)		39				Market Approach (g)		Illiquid price differences between settlement points (h)		$0.00 to $0.50
	Coal purchases		—			(32		)		(32		)		Market Approach (g)		Illiquid price variances between mines (i)		$0.00 to $1.00
																Probability of default (j)		5% to 40%
																Recovery rate (k)		0% to 40%
	Other		3			(1		)		2
	Total		$	83		$	(54	)		$	29
	____________
	(a)	Electricity purchase and sales contracts include wind generation agreements and hedging positions in the ERCOT west region as well as power contracts, the valuations of which include unobservable inputs related to the hourly shaping of the price curve. Electricity spread option contracts consist of physical electricity call options. Electricity congestion revenue rights contracts consist of forward purchase contracts (swaps and options) used to hedge electricity price differences between settlement points within ERCOT. Coal purchase contracts relate to western (Powder River Basin) coal. Interest rate swaps are held by TCEH to hedge exposure to its variable rate debt.
	(b)	The range of the inputs may be influenced by factors such as time of day, delivery period, season and location.
	(c)	Based on the historical range of forward average monthly ERCOT West Hub prices.
	(d)	Based on the historical range of forward average hourly ERCOT North Hub prices.
	(e)	Estimate of the historical range based on forward natural gas and on-peak power prices for the ERCOT hubs most relevant to our spread options.
	(f)	Based on historical forward price changes.
	(g)	While we use the market approach, there is either insufficient market data to consider the valuation liquid or the significance of credit reserves or non-performance risk adjustments results in a Level 3 designation.
	(h)	Based on the historical price differences between settlement points in the ERCOT North Hub and the ERCOT West Hub.
	(i)	Based on the historical range of price variances between mine locations.
	(j)	Estimate of the range of probabilities of default based on past experience and the length of the contract as well as our and counterparties' credit ratings.
	(k)	Estimate of the default recovery rate based on historical corporate rates.
	(l)	Estimate of nonperformance risk adjustment based on TCEH senior secured bond trading values. See discussion immediately below regarding transfers into Level 3.
Schedule of changes in fair value of the Level 3 assets and liabilities (all related to commodity contracts)	'
		Three Months Ended September 30,							Nine Months Ended September 30,
		2013			2012				2013				2012
	Net asset balance at beginning of period	$	88		$	12			$	29			$	53
	Total unrealized valuation gains (losses)	(24		)	12				(41		)		(5		)
	Purchases, issuances and settlements (a):
	Purchases	6			17				66				30
	Issuances	—			(4		)		(6		)		(15		)
	Settlements	(62		)	(56		)		(45		)		(34		)
	Transfers into Level 3 (b)	(1,179		)	3				(1,178		)		(42		)
	Transfers out of Level 3 (b)	—			—				4				(3		)
	Net change (c)	(1,259		)	(28		)		(1,200		)		(69		)
	Net liability balance at end of period	$	(1,171	)	$	(16	)		$	(1,171	)		$	(16	)
	Unrealized valuation gains (losses) relating to instruments held at end of period	$	254		$	15			$	280			$	(22	)
	____________
	(a)	Settlements reflect reversals of unrealized mark-to-market valuations previously recognized in net income. Purchases and issuances reflect option premiums paid or received.
	(b)	Includes transfers due to changes in the observability of significant inputs. Transfers in and out occur at the end of each quarter, which is when the assessments are performed. All Level 3 transfers during the periods presented are in and out of Level 2.
	(c)	Substantially all changes in values of commodity contracts are reported in the income statement in net gain (loss) from commodity hedging and trading activities. Changes in values of interest rate swaps are reported in the income statement in interest expense and related charges. Activity excludes changes in fair value in the month the position settled as well as amounts related to positions entered into and settled in the same month.

Commodity_And_Other_Derivative1

Commodity And Other Derivative Contractual Assets And Liabilities (Tables)	9 Months Ended
	Sep. 30, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]	'
Offsetting Assets and Liabilities [Table Text Block]	'
	The following tables reconcile our derivative assets and liabilities as presented in the consolidated balance sheet to net amounts after taking into consideration netting arrangements with counterparties and financial collateral:
	30-Sep-13
			Amounts Presented in Balance Sheet				Offsetting Financial Instruments (a)				Financial Collateral (Received) Pledged (b)				Net Amounts (c)
	Derivative assets:
	Commodity contracts		$	1,131			$	(613	)		$	(351	)		$	167
	Interest rate swaps		1				(1		)		—				—
	Total derivative assets		1,132				(614		)		(351		)		167
	Derivative liabilities:
	Commodity contracts		(209		)		180				11				(18		)
	Interest rate swaps		(1,167		)		434				—				(733		)
	Total derivative liabilities		(1,376		)		614				11				(751		)
	Net amounts		$	(244	)		$	—			$	(340	)		$	(584	)
	31-Dec-12
			Amounts Presented in Balance Sheet				Offsetting Financial Instruments (a)				Financial Collateral (Received) Pledged (b)				Net Amounts
	Derivative assets:
	Commodity contracts		$	2,047			$	(1,263	)		$	(597	)		$	187
	Interest rate swaps		2				(2		)		—				—
	Total derivative assets		2,049				(1,265		)		(597		)		187
	Derivative liabilities:
	Commodity contracts		(383		)		319				29				(35		)
	Interest rate swaps		(2,067		)		946				—				(1,121		)
	Total derivative liabilities		(2,450		)		1,265				29				(1,156		)
	Net amounts		$	(401	)		$	—			$	(568	)		$	(969	)
	____________
	(a)	Offsetting financial instruments with respect to commodity contracts include amounts related to interest rate swaps and vice versa. Amounts exclude trade accounts receivable and payable related to settled financial instruments.
	(b)	Financial collateral consists entirely of cash margin deposits.
	(c)	Includes net liability positions totaling approximately $1.2 billion (before nonperformance risk adjustment) related to counterparties with positions that are secured by a first-lien interest in the same assets of TCEH (on a pari passu basis) with the TCEH Senior Secured Facilities and the TCEH Senior Secured Notes.
Schedule of Commodity and Other Derivative Contractual Assets and Liabilities as Reported in the Balance Sheets	'
	The following tables provide detail of commodity and other derivative contractual assets and liabilities (with the column totals representing the net positions of the contracts) as reported in the balance sheets at September 30, 2013 and December 31, 2012:
	30-Sep-13
		Derivative assets								Derivative liabilities
		Commodity contracts				Interest rate swaps				Commodity contracts				Interest rate swaps				Total
	Current assets	$	972			$	1			$	—			$	—			$	973
	Noncurrent assets	159				—				—				—				159
	Current liabilities	(2		)		—				(204		)		(388		)		(594		)
	Noncurrent liabilities	—				—				(3		)		(779		)		(782		)
	Net assets (liabilities)	$	1,129			$	1			$	(207	)		$	(1,167	)		$	(244	)
	31-Dec-12
		Derivative assets								Derivative liabilities
		Commodity contracts				Interest rate swaps				Commodity contracts				Interest rate swaps				Total
	Current assets	$	1,461			$	2			$	—			$	—			$	1,463
	Noncurrent assets	586				—				—				—				586
	Current liabilities	—				—				(366		)		(528		)		(894		)
	Noncurrent liabilities	—				—				(17		)		(1,539		)		(1,556		)
	Net assets (liabilities)	$	2,047			$	2			$	(383	)		$	(2,067	)		$	(401	)
Schedule of Pre-tax Effect on Net Income of Derivatives Not Under Hedge Accounting, Including Realized and Unrealized Effects	'
	The following table presents the pretax effect of derivatives on net income (gains (losses)), including realized and unrealized effects:
			Three Months Ended September 30,								Nine Months Ended September 30,
	Derivative (income statement presentation)		2013				2012				2013				2012
	Commodity contracts (Net gain (loss) from commodity hedging and trading activities) (a)		$	98			$	(95	)		$	54			$	130
	Interest rate swaps (Interest expense and related charges) (b)		253				(188		)		433				(521		)
	Net gain (loss)		$	351			$	(283	)		$	487			$	(391	)
	_______________
	(a)	Amount represents changes in fair value of positions in the derivative portfolio during the period, as realized amounts related to positions settled are assumed to equal reversals of previously recorded unrealized amounts.
	(b)	Includes unrealized mark-to-market net gain (loss) as well as the net realized effect on interest paid/accrued, both reported in "Interest Expense and Related Charges" (see Note 12).
Schedule of Pre-tax Effect on Net Income and Other Comprehensive Income (OCI) of Derivative Instruments Previously Accounted for as Cash Flow Hedges	'
	The following table presents the pretax effect (all losses) on net income and other comprehensive income (OCI) of derivative instruments previously accounted for as cash flow hedges. There were no amounts recognized in OCI for the three and nine months ended September 30, 2013 and 2012.
			Three Months Ended September 30,								Nine Months Ended September 30,
	Derivative (income statement presentation)		2013				2012				2013				2012
	Interest rate swaps (Interest expense and related charges)		$	(1	)		$	(1	)		$	(6	)		$	(6	)
	Interest rate swaps (Depreciation and amortization)		(1		)		(1		)		(2		)		(2		)
	Total		$	(2	)		$	(2	)		$	(8	)		$	(8	)
Schedule of Gross Notional Amounts of Derivative Volumes	'
	The following table presents the gross notional amounts of derivative volumes at September 30, 2013 and December 31, 2012:
			30-Sep-13				31-Dec-12
	Derivative type		Notional Volume								Unit of Measure
	Interest rate swaps:
	Floating/fixed (a)		$	30,740			$	31,060			Million US dollars
	Basis		$	11,967			$	11,967			Million US dollars
	Natural gas:
	Natural gas forward sales and purchases (b)		452				875				Million MMBtu
	Locational basis swaps		337				495				Million MMBtu
	All other		2,021				1,549				Million MMBtu
	Electricity		21,663				76,767				GWh
	Congestion Revenue Rights (c)		82,156				111,185				GWh
	Coal		11				14				Million US tons
	Fuel oil		28				47				Million gallons
	Uranium		575				441				Thousand pounds
	_______________
	(a)	Includes notional amount of interest rate swaps with maturity dates through October 2014 as well as notional amount of swaps effective from October 2014 with maturity dates through October 2017 (see Note 5).
	(b)	Represents gross notional forward sales, purchases and options transactions in the natural gas hedging program. The net amount of these transactions was approximately 210 million MMBtu and 360 million MMBtu at September 30, 2013 and December 31, 2012, respectively.
	(c)	Represents gross forward purchases associated with instruments used to hedge electricity price differences between settlement points within ERCOT.

RelatedParty_Transactions_Tabl

Related-Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2013
Related Party Transactions [Abstract]	'
Schedule of related party intercompany payables	'
	At September 30, 2013 and December 31, 2012, the notes consisted of:
		30-Sep-13		31-Dec-12
	Note related to debt principal and interest payments (P&I Note)	$	—	$	465
	Note related to general corporate purposes (SG&A Note)	—		233
	Total	$	—	$	698
Schedule of related party transactions, debt held by related party	'
	As a result of debt repurchase and exchange transactions in 2009 through 2011, EFH Corp. and EFIH held TCEH debt securities as follows (principal amounts):
		30-Sep-13		31-Dec-12
	TCEH Senior Notes:
	Held by EFH Corp.	$	284	$	284
	Held by EFIH	79		79
	TCEH Term Loan Facilities:
	Held by EFH Corp.	19		19
	Total	$	382	$	382

Supplementary_Financial_Inform1

Supplementary Financial Information (Tables)	9 Months Ended
	Sep. 30, 2013
Supplementary Financial Information [Abstract]	'
Schedule of Other Nonoperating Income (Expense) [Table Text Block]	'
	Other Income
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Other income:
	Consent fee related to novation of hedge positions between counterparties	$	—		$	—		$	—		$	6
	Insurance/litigation settlements	—			—			2			2
	All other	1			2			5			4
	Total other income	$	1		$	2		$	7		$	12
	Other deductions:
	Impairment of mineral interests	$	—		$	24		$	—		$	24
	Other asset impairments	3			—			3			—
	Counterparty contract settlement	—			4			—			4
	Other	5			2			9			9
	Total other deductions	$	8		$	30		$	12		$	37
Schedule of interest expense and related charges	'
	Interest Expense and Related Charges
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Interest paid/accrued (including net amounts settled/accrued under interest rate swaps)	$	688		$	647		$	2,042		$	1,938
	Interest related to pushed down debt	1			19			5			57
	Interest payable with additional toggle notes (Note 5)	—			47			—			136
	Unrealized mark-to-market net (gain) loss on interest rate swaps	(413		)	20			(899		)	16
	Amortization of interest rate swap losses at dedesignation of hedge accounting	2			2			6			7
	Amortization of fair value debt discounts resulting from purchase accounting	3			3			8			8
	Amortization of debt issuance, amendment and extension costs and discounts	64			45			195			137
	Capitalized interest	(5		)	(11		)	(19		)	(31		)
	Total interest expense and related charges	$	340		$	772		$	1,338		$	2,268
Schedule of inventories by major category	'
	Inventories by Major Category
		30-Sep-13			31-Dec-12
	Materials and supplies	$	216		$	201
	Fuel stock	155			168
	Natural gas in storage	29			24
	Total inventories	$	400		$	393
Summary of other investments	'
	Investments
		30-Sep-13			31-Dec-12
	Nuclear plant decommissioning trust	$	737		$	654
	Assets related to employee benefit plans, including employee savings programs, net of distributions	1			8
	Land	40			41
	Miscellaneous other	9			7
	Total investments	$	787		$	710
Summary of investments in the fund	'
	A summary of investments in the fund follows:
		30-Sep-13
		Cost (a)			Unrealized gain			Unrealized loss			Fair market
											value
	Debt securities (b)	$	261		$	9		$	(4	)	$	266
	Equity securities (c)	252			227			(8		)	471
	Total	$	513		$	236		$	(12	)	$	737
		31-Dec-12
		Cost (a)			Unrealized gain			Unrealized loss			Fair market
											value
	Debt securities (b)	$	246		$	16		$	(1	)	$	261
	Equity securities (c)	245			161			(13		)	393
	Total	$	491		$	177		$	(14	)	$	654
	____________
	(a)	Includes realized gains and losses on securities sold.
	(b)	The investment objective for debt securities is to invest in a diversified tax efficient portfolio with an overall portfolio rating of AA or above as graded by S&P or Aa2 by Moody's Investors Services, Inc. The debt securities are heavily weighted with municipal bonds. The debt securities had an average coupon rate of 3.97% and 4.38% at September 30, 2013 and December 31, 2012, respectively, and an average maturity of 6 years at both September 30, 2013 and December 31, 2012.
	(c)	The investment objective for equity securities is to invest tax efficiently and to match the performance of the S&P 500 Index.
Summary of proceeds from sales of available-for-sale securities and the related realized gains and losses from such sales	'
	The following table summarizes proceeds from sales of available-for-sale securities and the related realized gains and losses from such sales.
		Three Months Ended September 30,						Nine Months Ended September 30,
		2013			2012			2013			2012
	Realized gains	$	1		$	—		$	2		$	1
	Realized losses	$	(3	)	$	(1	)	$	(3	)	$	(2	)
	Proceeds from sales of securities	$	23		$	25		$	128		$	56
	Investments in securities	$	(28	)	$	(30	)	$	(140	)	$	(68	)
Property, Plant and Equipment	'
	Property, Plant and Equipment
	At September 30, 2013 and December 31, 2012, property, plant and equipment of $18.0 billion and $18.6 billion, respectively, is stated net of accumulated depreciation and amortization of $7.7 billion and $6.8 billion, respectively.
Schedule of asset retirement and mining reclamation obligations	'
	The following table summarizes the changes to these obligations, reported in other current liabilities and other noncurrent liabilities and deferred credits in the balance sheet, for the nine months ended September 30, 2013:
		Nuclear Plant Decommissioning			Mining Land Reclamation			Other			Total
	Liability at December 31, 2012	$	368		$	135		$	33		$	536
	Additions:
	Accretion	17			23			1			41
	Reductions:
	Payments	—			(72		)	(1		)	(73		)
	Liability at September 30, 2013	385			86			33			504
	Less amounts due currently	—			(60		)	—			(60		)
	Noncurrent liability at September 30, 2013	$	385		$	26		$	33		$	444
Schedule of other noncurrent liabilities and deferred credits	'
	The balance of other noncurrent liabilities and deferred credits consists of the following:
		30-Sep-13			31-Dec-12
	Uncertain tax positions (including accrued interest)	$	384		$	1,250
	Asset retirement and mining reclamation obligations	444			452
	Unfavorable purchase and sales contracts	596			620
	Nuclear decommissioning cost over-recovery (Note 11)	352			284
	Other, including retirement and other employee benefits	17			37
	Total other noncurrent liabilities and deferred credits	$	1,793		$	2,643
Schedule of estimated amortization of unfavorable purchase and sales contracts for each of the next five fiscal years	'
	The estimated amortization of unfavorable purchase and sales contracts for each of the next five fiscal years is as follows:
	Year		Amount
	2013		$	25
	2014		$	24
	2015		$	23
	2016		$	23
	2017		$	23
Schedule of supplemental cash flow information	'
	Supplemental Cash Flow Information
		Nine Months Ended September 30,
		2013			2012
	Cash payments (receipts) related to:
	Interest paid (a)	$	1,901		$	1,788
	Capitalized interest	(19		)	(31		)
	Interest paid (net of capitalized interest) (a)	$	1,882		$	1,757
	Income taxes	$	134		$	83
	Noncash investing and financing activities:
	Effect of Parent's payment of interest, net of tax, on pushed down debt	$	21		$	30
	Principal amount of TCEH Toggle Notes issued in lieu of cash interest	$	—		$	88
	Construction expenditures (b)	$	62		$	52
	Contribution related to EFH Corp. stock-based compensation	$	1		$	6
	Debt assumed related to acquisition of combustion turbine trust interest	$	(45	)	$	—
	Effect of push down of debt from parent	$	(420	)	$	—
	Debt extension transactions	$	(340	)	$	—
	____________
	(a)	Net of amounts received under interest rate swap agreements.
	(b)	Represents end-of-period accruals.

Supplemental_Guarantor_Condens1

Supplemental Guarantor Condensed Financial Information (Tables)	9 Months Ended
	Sep. 30, 2013
Supplemental Guarantor Condensed Financial Information [Abstract]	'
Condensed Consolidating Statements of Income (Loss)	'
	ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
	Condensed Consolidating Statements of Income (Loss)
	Three Months Ended September 30, 2013
	(millions of dollars)
		Parent			Issuer			Other			Non-			Eliminations			Consolidated
		Guarantor						Guarantors			guarantors
	Operating revenues	$	—		$	—		$	1,893		$	27		$	(27	)	$	1,893
	Fuel, purchased power costs and delivery fees	—			—			(852		)	—			—			(852		)
	Net gain from commodity hedging and trading activities	—			20			38			—			—			58
	Operating costs	—			—			(192		)	—			3			(189		)
	Depreciation and amortization	—			—			(332		)	1			—			(331		)
	Selling, general and administrative expenses	—			(14		)	(173		)	(11		)	23			(175		)
	Franchise and revenue-based taxes	—			—			(18		)	—			—			(18		)
	Other income	—			—			1			—			—			1
	Other deductions	—			—			(8		)	—			—			(8		)
	Interest income	—			62			206			—			(267		)	1
	Interest expense and related charges	(4		)	(541		)	(619		)	(4		)	828			(340		)
	Income (loss) before income taxes	(4		)	(473		)	(56		)	13			560			40
	Income tax (expense) benefit	1			165			46			(5		)	(190		)	17
	Equity earnings of subsidiaries	60			368			1			—			(429		)	—
	Net income (loss)	57			60			(9		)	8			(59		)	57
	Other comprehensive income	1			1			—			—			(1		)	1
	Comprehensive income (loss)	$	58		$	61		$	(9	)	$	8		$	(60	)	$	58
	ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
	Condensed Consolidating Statements of Income (Loss)
	Three Months Ended September 30, 2012
	(millions of dollars)
		Parent			Issuer			Other			Non-			Eliminations			Consolidated
		Guarantor						Guarantors			guarantors
	Operating revenues	$	—		$	—		$	1,752		$	3		$	(3	)	$	1,752
	Fuel, purchased power costs and delivery fees	—			—			(850		)	—			—			(850		)
	Net gain (loss) from commodity hedging and trading activities	—			(98		)	95			—			—			(3		)
	Operating costs	—			—			(201		)	—			—			(201		)
	Depreciation and amortization	—			—			(328		)	—			—			(328		)
	Selling, general and administrative expenses	—			(4		)	(172		)	(1		)	3			(174		)
	Franchise and revenue-based taxes	—			—			(19		)	—			—			(19		)
	Other income	—			—			2			—			—			2
	Other deductions	—			—			(30		)	—			—			(30		)
	Interest income	—			91			232			—			(313		)	10
	Interest expense and related charges	(24		)	(982		)	(606		)	(2		)	842			(772		)
	Loss before income taxes	(24		)	(993		)	(125		)	—			529			(613		)
	Income tax benefit	8			347			54			—			(181		)	228
	Equity earnings (losses) of subsidiaries	(369		)	277			—			—			92			—
	Net loss	(385		)	(369		)	(71		)	—			440			(385		)
	Other comprehensive income	1			1			—			—			(1		)	1
	Comprehensive loss	$	(384	)	$	(368	)	$	(71	)	$	—		$	439		$	(384	)
	ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
	Condensed Consolidating Statements of Income (Loss)
	Nine Months Ended September 30, 2013
	(millions of dollars)
		Parent			Issuer			Other			Non-			Eliminations			Consolidated
		Guarantor						Guarantors			guarantors
	Operating revenues	$	—		$	—		$	4,572		$	59		$	(59	)	$	4,572
	Fuel, purchased power costs and delivery fees	—			—			(2,175		)	—			—			(2,175		)
	Net gain (loss) from commodity hedging and trading activities	—			(3		)	32			—			—			29
	Operating costs	—			—			(690		)	—			5			(685		)
	Depreciation and amortization	—			—			(1,011		)	(1		)	—			(1,012		)
	Selling, general and administrative expenses	—			(49		)	(481		)	(25		)	53			(502		)
	Franchise and revenue-based taxes	—			—			(51		)	—			—			(51		)
	Other income	—			—			7			—			—			7
	Other deductions	—			—			(12		)	—			—			(12		)
	Interest income	1			182			591			—			(769		)	5
	Interest expense and related charges	(15		)	(1,920		)	(1,842		)	(8		)	2,447			(1,338		)
Income (loss) before income taxes	(14		)	(1,790		)	(1,060		)	25			1,677			(1,162		)
Income tax (expense) benefit	7			630			420			(9		)	(572		)	476
Equity earnings (losses) of subsidiaries	(679		)	481			1			—			197			—
Net income (loss)	(686		)	(679		)	(639		)	16			1,302			(686		)
Other comprehensive income	5			5			—			—			(5		)	5
Comprehensive income (loss)	$	(681	)	$	(674	)	$	(639	)	$	16		$	1,297		$	(681	)
Condensed Consolidating Statements of Cash Flows	'
	ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
	Condensed Consolidating Statements of Cash Flows
	Nine Months Ended September 30, 2013
	(millions of dollars)
		Parent/			Issuer			Other			Non-			Eliminations			Consolidated
		Guarantor						Guarantors			guarantors
	Cash provided by (used in) operating activities	$	(8	)	$	(1,764	)	$	1,736		$	(85	)	$	—		$	(121	)
	Cash flows – financing activities:
	Notes/advances due to affiliates	11			1,913			—			—			(1,920		)	4
	Repayments/repurchases of long-term debt	(3		)	(64		)	(27		)	—			—			(94		)
	Net short-term borrowings under accounts receivable securitization program	—			—			—			90			—			90
	Contributions from noncontrolling interests	—			—			—			3			—			3
	Other, net	—			—			—			(10		)	—			(10		)
	Cash provided by (used in) financing activities	8			1,849			(27		)	83			(1,920		)	(7		)
	Cash flows – investing activities:
	Capital expenditures	—			—			(349		)	(4		)	—			(353		)
	Nuclear fuel purchases	—			—			(59		)	—			—			(59		)
	Notes due from affiliates	—			—			(1,222		)	—			1,920			698
	Purchase of right to use certain computer-related assets from parent	—			—			(6		)	—			—			(6		)
	Proceeds from sales of assets	—			—			3			—			—			3
	Acquisition of combustion turbine trust interest	—			—			(40		)	—			—			(40		)
	Purchases of environmental allowances and credits	—			—			(13		)	—			—			(13		)
	Proceeds from sales of nuclear decommissioning trust fund securities	—			—			128			—			—			128
	Investments in nuclear decommissioning trust fund securities	—			—			(140		)	—			—			(140		)
	Other, net	—			—			(3		)	—			—			(3		)
	Cash provided by (used in) investing activities	—			—			(1,701		)	(4		)	1,920			215
	Net change in cash and cash equivalents	—			85			8			(6		)	—			87
	Cash and cash equivalents – beginning balance	—			1,115			15			45			—			1,175
	Cash and cash equivalents – ending balance	$	—		$	1,200		$	23		$	39		$	—		$	1,262
	ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
	Condensed Consolidating Statements of Cash Flows
	Nine Months Ended September 30, 2012
	(millions of dollars)
		Parent/			Issuer			Other			Non-			Eliminations			Consolidated
		Guarantor						Guarantors			guarantors
	Cash provided by (used in) operating activities	$	(7	)	$	(471	)	$	885		$	(78	)	$	—		$	329
	Cash flows – financing activities:
	Notes due to affiliates	11			1,029			—			—			(1,040		)	—
	Repayments/repurchases of long-term debt	(4		)	—			(26		)	—			—			(30		)
	Net short-term borrowings under accounts receivable securitization program	—			—			—			80			—			80
	Decrease in other short-term borrowings	—			(385		)	—			—			—			(385		)
	Decrease in income tax-related note payable to Oncor	—			—			(20		)	—			—			(20		)
	Settlement of reimbursement agreements with Oncor	—			—			(159		)	—			—			(159		)
	Contributions from noncontrolling interests	—			—			—			6			—			6
	Sale/leaseback of equipment	—			—			15			—			—			15
	Cash provided by (used in) financing activities	7			644			(190		)	86			(1,040		)	(493		)
	Cash flows – investing activities:
	Capital expenditures	—			—			(491		)	(7		)	—			(498		)
	Nuclear fuel purchases	—			—			(155		)	—			—			(155		)
	Notes/loans due from affiliates	—			—			(118		)	—			1,040			922
	Proceeds from sales of assets	—			—			1			—			—			1
	Changes in restricted cash	—			—			112			—			—			112
	Purchases of environmental allowances and credits	—			—			(19		)	—			—			(19		)
	Proceeds from sales of nuclear decommissioning trust fund securities	—			—			56			—			—			56
	Investments in nuclear decommissioning trust fund securities	—			—			(68		)	—			—			(68		)
	Other, net	—			—			2			—			—			2
	Cash provided by (used in) investing activities	—			—			(680		)	(7		)	1,040			353
	Net change in cash and cash equivalents	—			173			15			1			—			189
	Cash and cash equivalents – beginning balance	—			87			23			10			—			120
	Cash and cash equivalents – ending balance	$	—		$	260		$	38		$	11		$	—		$	309
	ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
	Condensed Consolidating Balance Sheets
	30-Sep-13
(millions of dollars)
	Parent			Issuer			Other			Non-guarantors			Eliminations			Consolidated
	Guarantor						Guarantors
ASSETS
Current assets:
Cash and cash equivalents	$	—		$	1,200		$	23		$	39		$	—		$	1,262
Advances to affiliates	—			—			74			—			(74		)	—
Trade accounts receivable – net	—			1			315			574			(94		)	796
Income taxes receivable	7			—			84			—			(84		)	7
Accounts receivable from affiliates	—			13			—			5			(18		)	—
Inventories	—			—			400			—			—			400
Commodity and other derivative contractual assets	—			726			247			—			—			973
Accumulated deferred income taxes	3			—			—			3			(6		)	—
Margin deposits related to commodity positions	—			—			21			—			—			21
Other current assets	—			2			32			—			—			34
Total current assets	10			1,942			1,196			621			(276		)	3,493
Restricted cash	—			947			—			—			—			947
Investments	(10,467		)	23,885			867			9			(13,507		)	787
Property, plant and equipment – net	—			—			17,760			201			—			17,961
Advances to affiliates	—			—			9,972			—			(9,972		)	—
Goodwill	—			4,952			—			—			—			4,952
Identifiable intangible assets – net	—			—			1,736			5			(5		)	1,736
Commodity and other derivative contractual assets	—			147			12			—			—			159
Accumulated deferred income taxes	—			490			—			3			(493		)	—
Other noncurrent assets, principally unamortized amendment/issuance costs	—			834			849			7			(831		)	859
Total assets	$	(10,457	)	$	33,197		$	32,392		$	846		$	(25,084	)	$	30,894
LIABILITIES AND MEMBERSHIP INTERESTS
Current liabilities:
Short-term borrowings	$	—		$	2,054		$	2,054		$	172		$	(2,054	)	$	2,226
Notes/advances from affiliates	1			10,045			—			—			(10,046		)	—
Long-term debt due currently	11			—			10			11			—			32
Trade accounts payable	—			5			348			95			(94		)	354
Trade accounts and other payables to affiliates	—			—			223			—			(18		)	205
Notes payable to parent	92			—			—			—			—			92
Commodity and other derivative contractual liabilities	—			413			181			—			—			594
ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
Condensed Consolidating Balance Sheets
30-Sep-13
(millions of dollars)
	Parent			Issuer			Other			Non-guarantors			Eliminations			Consolidated
	Guarantor						Guarantors
Margin deposits related to commodity positions	$	—		$	335		$	18		$	—		$	—		$	353
Accumulated deferred income taxes	—			3			39			—			(6		)	36
Accrued income taxes payable to parent	—			70			—			14			(84		)	—
Accrued taxes other than income	—			—			95			—			—			95
Accrued interest	3			528			401			1			(401		)	532
Other current liabilities	—			—			219			—			—			219
Total current liabilities	107			13,453			3,588			293			(12,703		)	4,738
Accumulated deferred income taxes	84			—			2,782			—			481			3,347
Commodity and other derivative contractual liabilities	—			779			3			—			—			782
Notes or other liabilities due affiliates	—			—			2			—			—			2
Long-term debt held by affiliates	—			382			—			—			—			382
Long-term debt, less amounts due currently	92			29,604			28,704			22			(28,652		)	29,770
Affiliate tax sharing liability	—			(571		)	1,294			—			—			723
Other noncurrent liabilities and deferred credits	8			17			1,774			—			(6		)	1,793
Total liabilities	291			43,664			38,147			315			(40,880		)	41,537
EFCH membership interests	(10,748		)	(10,467		)	(5,755		)	426			15,796			(10,748		)
Noncontrolling interests in subsidiaries	—			—			—			105			—			105
Total membership interests	(10,748		)	(10,467		)	(5,755		)	531			15,796			(10,643		)
Total liabilities and membership interests	$	(10,457	)	$	33,197		$	32,392		$	846		$	(25,084	)	$	30,894
Condensed Consolidating Balance Sheet	'
	ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
	Condensed Consolidating Balance Sheets
	30-Sep-13
	(millions of dollars)
		Parent			Issuer			Other			Non-guarantors			Eliminations			Consolidated
		Guarantor						Guarantors
	ASSETS
	Current assets:
	Cash and cash equivalents	$	—		$	1,200		$	23		$	39		$	—		$	1,262
	Advances to affiliates	—			—			74			—			(74		)	—
	Trade accounts receivable – net	—			1			315			574			(94		)	796
	Income taxes receivable	7			—			84			—			(84		)	7
	Accounts receivable from affiliates	—			13			—			5			(18		)	—
	Inventories	—			—			400			—			—			400
	Commodity and other derivative contractual assets	—			726			247			—			—			973
	Accumulated deferred income taxes	3			—			—			3			(6		)	—
	Margin deposits related to commodity positions	—			—			21			—			—			21
	Other current assets	—			2			32			—			—			34
	Total current assets	10			1,942			1,196			621			(276		)	3,493
	Restricted cash	—			947			—			—			—			947
	Investments	(10,467		)	23,885			867			9			(13,507		)	787
	Property, plant and equipment – net	—			—			17,760			201			—			17,961
	Advances to affiliates	—			—			9,972			—			(9,972		)	—
	Goodwill	—			4,952			—			—			—			4,952
	Identifiable intangible assets – net	—			—			1,736			5			(5		)	1,736
	Commodity and other derivative contractual assets	—			147			12			—			—			159
	Accumulated deferred income taxes	—			490			—			3			(493		)	—
	Other noncurrent assets, principally unamortized amendment/issuance costs	—			834			849			7			(831		)	859
	Total assets	$	(10,457	)	$	33,197		$	32,392		$	846		$	(25,084	)	$	30,894
	LIABILITIES AND MEMBERSHIP INTERESTS
	Current liabilities:
	Short-term borrowings	$	—		$	2,054		$	2,054		$	172		$	(2,054	)	$	2,226
	Notes/advances from affiliates	1			10,045			—			—			(10,046		)	—
	Long-term debt due currently	11			—			10			11			—			32
	Trade accounts payable	—			5			348			95			(94		)	354
	Trade accounts and other payables to affiliates	—			—			223			—			(18		)	205
	Notes payable to parent	92			—			—			—			—			92
	Commodity and other derivative contractual liabilities	—			413			181			—			—			594
	ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
	Condensed Consolidating Balance Sheets
	30-Sep-13
	(millions of dollars)
		Parent			Issuer			Other			Non-guarantors			Eliminations			Consolidated
		Guarantor						Guarantors
	Margin deposits related to commodity positions	$	—		$	335		$	18		$	—		$	—		$	353
	Accumulated deferred income taxes	—			3			39			—			(6		)	36
	Accrued income taxes payable to parent	—			70			—			14			(84		)	—
	Accrued taxes other than income	—			—			95			—			—			95
	Accrued interest	3			528			401			1			(401		)	532
	Other current liabilities	—			—			219			—			—			219
	Total current liabilities	107			13,453			3,588			293			(12,703		)	4,738
	Accumulated deferred income taxes	84			—			2,782			—			481			3,347
	Commodity and other derivative contractual liabilities	—			779			3			—			—			782
	Notes or other liabilities due affiliates	—			—			2			—			—			2
	Long-term debt held by affiliates	—			382			—			—			—			382
	Long-term debt, less amounts due currently	92			29,604			28,704			22			(28,652		)	29,770
	Affiliate tax sharing liability	—			(571		)	1,294			—			—			723
	Other noncurrent liabilities and deferred credits	8			17			1,774			—			(6		)	1,793
	Total liabilities	291			43,664			38,147			315			(40,880		)	41,537
	EFCH membership interests	(10,748		)	(10,467		)	(5,755		)	426			15,796			(10,748		)
	Noncontrolling interests in subsidiaries	—			—			—			105			—			105
	Total membership interests	(10,748		)	(10,467		)	(5,755		)	531			15,796			(10,643		)
	Total liabilities and membership interests	$	(10,457	)	$	33,197		$	32,392		$	846		$	(25,084	)	$	30,894
ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
Condensed Consolidating Balance Sheets
31-Dec-12
(millions of dollars)
	Parent			Issuer			Other			Non-guarantors			Eliminations			Consolidated
	Guarantor						Guarantors
ASSETS
Current assets:
Cash and cash equivalents	$	—		$	1,115		$	15		$	45		$	—		$	1,175
Advances to affiliates	—			—			36			—			(36		)	—
Trade accounts receivable – net	—			2			360			445			(97		)	710
Notes receivable from parent	—			698			—			—			—			698
Income taxes receivable	—			—			410			—			(410		)	—
Accounts receivable from affiliates	—			95			—			—			(95		)	—
Inventories	—			—			393			—			—			393
Commodity and other derivative contractual assets	—			1,127			336			—			—			1,463
Accumulated deferred income taxes	3			—			—			3			(6		)	—
Margin deposits related to commodity positions	—			—			71			—			—			71
Other current assets	—			—			112			8			—			120
Total current assets	3			3,037			1,733			501			(644		)	4,630
Restricted cash	—			947			—			—			—			947
Investments	(9,794		)	23,382			747			9			(13,634		)	710
Property, plant and equipment – net	—			—			18,422			134			—			18,556
Advances to affiliates	—			—			8,794			—			(8,794		)	—
Goodwill	—			4,952			—			—			—			4,952
Identifiable intangible assets – net	—			—			1,781			—			—			1,781
Commodity and other derivative contractual assets	—			575			11			—			—			586
Accumulated deferred income taxes	—			828			—			3			(831		)	—
Other noncurrent assets, principally unamortized amendment/issuance costs	4			781			806			3			(783		)	811
Total assets	$	(9,787	)	$	34,502		$	32,294		$	650		$	(24,686	)	$	32,973
LIABILITIES AND EQUITY
Current liabilities:
Short-term borrowings	$	—		$	2,054		$	2,054		$	82		$	(2,054	)	$	2,136
Notes/advances from affiliates	—			8,830			—			—			(8,830		)	—
Long-term debt due currently	11			64			21			—			—			96
Trade accounts payable	—			2			387			97			(97		)	389
Trade accounts and other payables to affiliates	—			—			231			3			(95		)	139
Notes payable to parent/affiliate	80			—			1			—			—			81
Commodity and other derivative contractual liabilities	—			610			284			—			—			894
ENERGY FUTURE COMPETITIVE HOLDINGS COMPANY LLC AND SUBSIDIARIES
Condensed Consolidating Balance Sheets
31-Dec-12
(millions of dollars)
	Parent			Issuer			Other			Non-guarantors			Eliminations			Consolidated
	Guarantor						Guarantors
Margin deposits related to commodity positions	$	—		$	596		$	4		$	—		$	—		$	600
Accumulated deferred income taxes	—			3			52			—			(6		)	49
Accrued income taxes payable to parent	2			433			—			6			(410		)	31
Accrued taxes other than income	—			—			17			—			—			17
Accrued interest	18			389			281			—			(281		)	407
Other current liabilities	1			4			253			—			(3		)	255
Total current liabilities	112			12,985			3,585			188			(11,776		)	5,094
Accumulated deferred income taxes	79			—			3,569			—			111			3,759
Commodity and other derivative contractual liabilities	—			1,539			17			—			—			1,556
Notes or other liabilities due affiliates	—			—			5			—			—			5
Long-term debt held by affiliates	—			382			—			—			—			382
Long-term debt, less amounts due currently	515			29,355			28,486			—			(28,428		)	29,928
Other noncurrent liabilities and deferred credits	13			36			2,594			—			—			2,643
Total liabilities	719			44,297			38,256			188			(40,093		)	43,367
EFCH shareholder's equity	(10,506		)	(9,795		)	(5,962		)	350			15,407			(10,506		)
Noncontrolling interests in subsidiaries	—			—			—			112			—			112
Total equity	(10,506		)	(9,795		)	(5,962		)	462			15,407			(10,394		)
Total liabilities and equity	$	(9,787	)	$	34,502		$	32,294		$	650		$	(24,686	)	$	32,973

Business_And_Significant_Accou2

Business And Significant Accounting Policies (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012		Sep. 30, 2012	Dec. 31, 2011
Business and Significant Accounting Policies	'	'		'	'
Cash and cash equivalents	$1,262,000,000	$1,175,000,000		$309,000,000	$120,000,000
Texas Competitive Electric Holdings Company LLC [Member]	'	'		'	'
Business and Significant Accounting Policies	'	'		'	'
Cash and cash equivalents	1,300,000,000	'		'	'
Energy Future Competitive Holdings Company [Member]	'	'		'	'
Business and Significant Accounting Policies	'	'		'	'
Debt Long-term And Short-term Combined Amount, Gross	32,200,000,000	'		'	'
Parent/ Guarantor [Member]	'	'		'	'
Business and Significant Accounting Policies	'	'		'	'
Cash and cash equivalents	0	0		0	0
Debt Long-term And Short-term Combined Amount, Gross	700,000,000	'		'	'
Energy Future Intermediate Holding CO LLC [Member]	'	'		'	'
Business and Significant Accounting Policies	'	'		'	'
Debt Long-term And Short-term Combined Amount, Gross	7,600,000,000	'		'	'
Line of Credit [Member] | Texas Competitive Electric Holdings Company LLC [Member]	'	'		'	'
Business and Significant Accounting Policies	'	'		'	'
Long-term Debt, Gross	22,635,000,000	'		'	'
Letter of Credit Facility maturing October 2017 [Member] | Letter of Credit [Member] | Texas Competitive Electric Holdings Company LLC [Member]	'	'		'	'
Business and Significant Accounting Policies	'	'		'	'
Resticted cash, additional letters of credit that can be supported	171,000,000	'		'	'
TCEH Term Loan Facilities maturing October 10, 2014 [Member] | Line of Credit [Member] | Texas Competitive Electric Holdings Company LLC [Member]	'	'		'	'
Business and Significant Accounting Policies	'	'		'	'
Long-term Debt, Gross	$3,809,000,000	$3,809,000,000	[1],[2]	'	'
[1]	Interest rates in effect at September 30, 2013.
[2]	Interest rate swapped to fixed on $18.140 billion principal amount of maturities through October 2014 and up to an aggregate $12.6 billion principal amount from October 2014 through

Consolidation_Of_Variable_Inte2

Consolidation Of Variable Interest Entities (Carrying Amounts and Classifications of Assets and Liabilities Related to Consolidated VIEs) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
In Millions, unless otherwise specified					Consolidated VIEs [Member]	Consolidated VIEs [Member]	Texas Competitive Electric Holdings Company LLC [Member]	Texas Competitive Electric Holdings Company LLC [Member]	MHI [Member]
					Nuclear_generation_units			Consolidated VIEs [Member]	Consolidated VIEs [Member]
Variable Interest Entity [Line Items]	'	'	'	'	'	'	'	'	'
Number of new nuclear generation units in development (in nuclear generation units)	'	'	'	'	2	'	'	'	'
Variable interest entity, ownership percentage (as a percent)	'	'	'	'	'	'	'	88.00%	12.00%
Assets:	'	'	'	'	'	'	'	'	'
Cash and cash equivalents	$1,262	$1,175	$309	$120	$37	$43	$1,300	'	'
Accounts receivable	796	710	'	'	573	445	'	'	'
Property, plant and equipment	17,961	18,556	'	'	138	134	'	'	'
Other assets, including $3 million and $12 million of current assets	'	'	'	'	12	16	'	'	'
Other current assets	34	120	'	'	3	12	'	'	'
Total assets	30,894	32,973	'	'	760	638	'	'	'
Liabilities:	'	'	'	'	'	'	'	'	'
Short-term borrowings	2,226	2,136	'	'	172	82	'	'	'
Trade accounts payable	354	389	'	'	1	1	'	'	'
Other current liabilities	219	255	'	'	13	7	'	'	'
Total liabilities	$41,537	$43,367	'	'	$186	$90	'	'	'

Goodwill_And_Identifiable_Inta2

Goodwill And Identifiable Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended
In Billions, unless otherwise specified	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]	'
Impairment of goodwill	$1.20

Goodwill_And_Identifiable_Inta3

Goodwill And Identifiable Intangible Assets (Goodwill) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
Goodwill, Gross	'	$18,322
Accumulated impairment charges	'	-13,370
Balance at December 31, 2012	$4,952	$4,952

Goodwill_And_Identifiable_Inta4

Goodwill And Identifiable Intangible Assets (Identifiable Intangible Assets Reported in the Balance Sheet) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Finite-Lived and Indefinite-Lived Intangible [Line Items]	'	'
Gross Carrying Amount	$2,156	$2,092
Accumulated Amortization	1,386	1,279
Total intangible assets subject to amortization, net	770	813
Total identifiable intangible assets	1,736	1,781
Retail trade name (not subject to amortization) [Member]	'	'
Finite-Lived and Indefinite-Lived Intangible [Line Items]	'	'
Gross Carrying Amount, Unamortized Intangibles	955	955
Mineral interests (not currently subject to amortization) [Member]	'	'
Finite-Lived and Indefinite-Lived Intangible [Line Items]	'	'
Gross Carrying Amount, Unamortized Intangibles	11	13
Retail customer relationship [Member]	'	'
Finite-Lived and Indefinite-Lived Intangible [Line Items]	'	'
Gross Carrying Amount	463	463
Accumulated Amortization	396	378
Total intangible assets subject to amortization, net	67	85
Favorable purchase and sales contracts [Member]	'	'
Finite-Lived and Indefinite-Lived Intangible [Line Items]	'	'
Gross Carrying Amount	551	552
Accumulated Amortization	333	314
Total intangible assets subject to amortization, net	218	238
Software and other computer-related assets [Member]	'	'
Finite-Lived and Indefinite-Lived Intangible [Line Items]	'	'
Gross Carrying Amount	348	320
Accumulated Amortization	145	112
Total intangible assets subject to amortization, net	203	208
Environmental allowances and credits [Member]	'	'
Finite-Lived and Indefinite-Lived Intangible [Line Items]	'	'
Gross Carrying Amount	598	594
Accumulated Amortization	407	393
Total intangible assets subject to amortization, net	191	201
Mining development costs [Member]	'	'
Finite-Lived and Indefinite-Lived Intangible [Line Items]	'	'
Gross Carrying Amount	196	163
Accumulated Amortization	105	82
Total intangible assets subject to amortization, net	$91	$81

Goodwill_And_Identifiable_Inta5

Goodwill And Identifiable Intangible Assets (Amortization Expense Related to Intangible Assets (including income statement line item)) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Amortization expense	$39	$35	$104	$104
Retail customer relationship [Member] | Depreciation and amortization [Member]	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Amortization expense	6	8	18	25
Favorable purchase and sales contracts [Member] | Operating revenues/ Fuel, purchased power costs and delivery fees [Member]	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Amortization expense	6	5	19	20
Software and other computer-related assets [Member] | Depreciation and amortization [Member]	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Amortization expense	14	9	33	24
Environmental allowances and credits [Member] | Fuel, purchased power costs and delivery fees [Member]	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Amortization expense	5	6	11	15
Mining development costs [Member] | Depreciation and amortization [Member]	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Amortization expense	$8	$7	$23	$20

Goodwill_And_Identifiable_Inta6

Goodwill And Identifiable Intangible Assets (Estimated Amortization of Intangible Assets) (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Future Amortization Expense	'
2013	$143
2014	138
2015	126
2016	101
2017	$78

Trade_Accounts_Receivable_And_2

Trade Accounts Receivable And Accounts Receivable Securitization Program (Narrative) (Details) (USD $)

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Dec. 31, 2011

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Oct. 31, 2013

Oct. 31, 2013

In Millions, unless otherwise specified

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

T X U Receivables Company [Member]

Consolidation, Eliminations [Member]

Consolidation, Eliminations [Member]

Subsequent Event [Member]

Subsequent Event [Member]

T X U Receivables Company [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

T X U Receivables Company [Member]

Consolidation, Eliminations [Member]

T X U Receivables Company [Member]

T X U Receivables Company [Member]

Texas Competitive Electric Holdings Company LLC [Member]

T X U Receivables Company [Member]

Accounts, Notes, Loans and Financing Receivable [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Program Termination, Face Amount of Receivables Repurchased

'

'

'

'

'

'

'

'

'

'

'

$491

Program Termination, Purchase Price of Receivables Repurchased

'

'

'

'

'

'

'

'

'

'

'

474

Program Termination, Repayment of Borrowings To Financial Institution

'

'

'

'

'

'

'

'

'

'

126

'

Program Termination, Repayment of Subordinated Notes Payable

'

'

'

'

'

'

'

'

'

'

'

11

Maximum funding capacity

'

'

'

'

200

'

'

'

'

'

'

'

Program funding

'

'

'

'

172

82

'

'

'

'

'

'

Decrease in customer deposits held by the originator because TCEH's credit ratings were lower than Ba3/BB-

'

'

'

'

33

'

'

'

'

'

'

'

Subordinated notes, limited percentage of uncollected accounts receivable purchased

'

'

'

'

'

'

25.00%

'

'

'

'

'

Cash and cash equivalents

1,262

1,175

309

120

1,300

'

'

37

'

'

'

'

Subordinated notes payable

'

'

'

'

'

'

'

'

93

97

'

'

Unbilled revenue related to gross trade receivables

$272

$260

'

'

'

'

'

'

'

'

'

'

Trade_Accounts_Receivable_And_3

Trade Accounts Receivable And Accounts Receivable Securitization Program (Program fee amounts/ Activities of TXU Receivables Company/ Trade Accounts Receivable/ Allowance for Uncollectible Accounts Receivable) (Details) (USD $)	9 Months Ended			3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
				Texas Competitive Electric Holdings Company LLC [Member]	Texas Competitive Electric Holdings Company LLC [Member]	Texas Competitive Electric Holdings Company LLC [Member]		Texas Competitive Electric Holdings Company LLC [Member]
				T X U Receivables Company [Member]	T X U Receivables Company [Member]	T X U Receivables Company [Member]		T X U Receivables Company [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'	'	'		'
Program fees	'	'	'	($3)	($2)	($6)		($6)
Program fees as a percentage of average funding (annualized)	'	'	'	5.10%	4.90%	5.80%		6.20%
Cash collections on accounts receivable	'	'	'	'	'	3,200		3,501
Face amount of new receivables purchased (a)	'	'	'	'	'	-3,328	[1]	-3,571	[1]
Discount from face amount of purchased receivables	'	'	'	'	'	29		8
Servicing fees paid for recordkeeping and collection services	'	'	'	'	'	0		-2
Decrease in subordinated notes payable	'	'	'	'	'	-4		-10
Increase in cash held	'	'	'	'	'	17		0
Accounts Receivable Securitization Program, Other, Net	'	'	'	'	'	2		0
Cash flows provided to originator under the program	'	'	'	'	'	-90		-80
Wholesale and retail trade accounts receivable	813	'	719	'	'	'		'
Wholesale and retail trade accounts receivable, pledged retail receivables	574	'	445	'	'	'		'
Allowance for uncollectible accounts	-17	-15	'	'	'	'		'
Trade accounts receivable b reported in balance sheet, including $573 and $445 in pledged retail receivables	796	'	710	'	'	'		'
Allowance for Doubtful Accounts Receivable [Roll Forward]	'	'	'	'	'	'		'
Allowance for uncollectible accounts receivable at beginning of period	9	27	'	'	'	'		'
Increase for bad debt expense	23	20	'	'	'	'		'
Decrease for account write-offs	-15	-32	'	'	'	'		'
Allowance for uncollectible accounts receivable at end of period	$17	$15	'	'	'	'		'
[1]	Net of allowance for uncollectible accounts.

ShortTerm_Borrowings_And_LongT2

Short-Term Borrowings And Long-Term Debt (Short-Term Borrowings) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Short-term Debt [Line Items]	'	'
Short-term borrowings	$2,226	$2,136
Texas Competitive Electric Holdings Company LLC [Member]	'	'
Short-term Debt [Line Items]	'	'
Program funding under the accounts receivable securitization program	172	82
Texas Competitive Electric Holdings Company LLC [Member] | Revolving Credit Facility [Member]	'	'
Short-term Debt [Line Items]	'	'
Short-term borrowings	$2,054	$2,054
Short-term borrowings, weighted average interest rate (as a percent)	4.68%	4.40%

ShortTerm_Borrowings_And_LongT3

Short-Term Borrowings And Long-Term Debt (Credit Facilities) (Details) (USD $)

9 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

12 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2010

Sep. 30, 2013

Dec. 31, 2010

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Jan. 31, 2013

Jan. 31, 2013

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Subsequent Event [Member]

Subsequent Event [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Letter of Credit [Member]

Letter of Credit [Member]

Letter of Credit [Member]

Line of Credit [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Revolving Credit Facility maturing October 2013 [Member]

Revolving Credit Facility maturing October 2013 [Member]

Revolving Credit Facility maturing October 2016 [Member]

Revolving Credit Facility maturing October 2016 [Member]

Letter of Credit Facility maturing October 2017 [Member]

Letter of Credit Facility maturing October 2014 [Member]

Letter of Credit Facility maturing October 2014 [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility maturing October 2013 Extended to October 2016 [Member]

Credit Facilities [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

Facility Limit

'

'

$3,116

'

'

$2,054

[1]

'

$1,062

[2]

'

'

'

$2,054

$645

Letters of Credit

'

'

0

'

'

0

[1]

'

0

[2]

'

'

'

'

'

Cash Borrowings

'

'

3,116

'

'

2,054

[1]

'

1,062

[2]

'

'

'

'

'

Availability

'

'

0

'

'

0

[1]

'

0

[2]

'

'

'

'

'

Basis Spread on LIBOR Rate (as a percent)

'

'

'

4.50%

'

4.50%

'

'

3.50%

'

'

'

'

Per annum rate, commitment fee of average daily unused portion of credit facility (as a percent)

'

'

'

'

1.00%

1.00%

1.00%

'

'

'

'

'

'

Long-term debt, gross

'

'

'

'

'

'

'

'

42

[3]

42

[3]

22,635

'

'

Restricted cash

947

947

'

'

'

'

'

947

'

'

'

'

'

Reduction in restricted cash related to letter of credit drawn related to office building financing

'

'

'

'

'

'

'

-115

'

'

'

'

'

Restricted Cash, Amount supported in letters of credit outstanding

'

'

'

'

'

'

'

776

'

'

'

'

'

Resticted cash, additional letters of credit that can be supported

'

'

'

'

'

'

'

171

'

'

'

'

'

Debt Issuance Fee Paid By Issuance Of Debt

$340

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Facility used for borrowings for general corporate purposes. Borrowings are classified as short-term borrowings. At September 30, 2013, borrowings under the facility bear interest at LIBOR plus 4.50%, and a commitment fee is payable quarterly in arrears at a rate per annum equal to 1.00% of the average daily unused portion of the facility. In January 2013, commitments previously maturing in 2013 were extended to 2016 as discussed below.

[2]

Facility, $42 million of which matures in October 2014, used for issuing letters of credit for general corporate purposes, including, but not limited to, providing collateral support under hedging arrangements and other commodity transactions that are not secured by a first-lien interest in the assets of TCEH. The borrowings under this facility have been recorded by TCEH as restricted cash that supports issuances of letters of credit and are classified as long-term debt. At September 30, 2013, the restricted cash totaled $947 million, after reduction for a $115 million letter of credit drawn in 2009 related to an office building financing. At September 30, 2013, the restricted cash supports $776 million in letters of credit outstanding, leaving $171 million in available letter of credit capacity.

[3]

Interest rates in effect at September 30, 2013.

ShortTerm_Borrowings_And_LongT4

Short-Term Borrowings And Long-Term Debt (Long-Term Debt) (Details) (USD $)

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

In Millions, unless otherwise specified

Consolidated Debt [Member]

Consolidated Debt [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Fixed Notes [Member]

Fixed Notes [Member]

Fixed Notes [Member]

Fixed Notes [Member]

Junior Subordinated Debentures [Member]

Junior Subordinated Debentures [Member]

Junior Subordinated Debentures [Member]

Junior Subordinated Debentures [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Pollution control revenue bonds [Member]

Pollution control revenue bonds [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Term loan Facilities [Member]

Term loan Facilities [Member]

Term loan Facilities [Member]

Term loan Facilities [Member]

Term loan Facilities [Member]

Term loan Facilities [Member]

Term loan Facilities [Member]

Letter of Credit [Member]

Letter of Credit [Member]

Letter of Credit [Member]

Letter of Credit [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed/Floating Series [Member]

Fixed Secured Facility Bonds [Member]

Fixed Secured Facility Bonds [Member]

Fixed Secured Facility Bonds [Member]

Fixed Secured Facility Bonds [Member]

Fixed Secured Facility Bonds [Member]

Energy Future Holdings Corp. [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Energy Future Holdings Corp. [Member]

Texas Competitive Electric Holdings Company LLC [Member]

9.58% Fixed Notes due in annual installments through December 4, 2019 [Member]

9.58% Fixed Notes due in annual installments through December 4, 2019 [Member]

8.254% Fixed Notes due in quarterly installments through December 31, 2021 [Member]

8.254% Fixed Notes due in quarterly installments through December 31, 2021 [Member]

Floating Rate Junior Subordinated Debentures, Series D due January 30, 2037 [Member]

Floating Rate Junior Subordinated Debentures, Series D due January 30, 2037 [Member]

8.175% Fixed Junior Subordinated Debentures, Series E due January 30, 2037 [Member]

8.175% Fixed Junior Subordinated Debentures, Series E due January 30, 2037 [Member]

10% Fixed Senior Secured First Lien Notes due January 15, 2020 [Member]

10% Fixed Senior Secured First Lien Notes due January 15, 2020 [Member]

9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member]

9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member]

10.875% Fixed Senior Notes due November 1, 2017 [Member]

10.875% Fixed Senior Notes due November 1, 2017 [Member]

11.25 / 12.00% Senior Toggle Notes due November 1, 2017 [Member]

11.25 / 12.00% Senior Toggle Notes due November 1, 2017 [Member]

11.5% Fixed Senior Secured Notes due October 1, 2020 [Member]

11.5% Fixed Senior Secured Notes due October 1, 2020 [Member]

15% Fixed Senior Secured Second Lien Notes due April 1, 2021 [Member]

15% Fixed Senior Secured Second Lien Notes due April 1, 2021 [Member]

15% Fixed Senior Secured Second Lien Notes due April 1, 2021, Series B [Member]

15% Fixed Senior Secured Second Lien Notes due April 1, 2021, Series B [Member]

10.25% Fixed Senior Notes due November 1, 2015 [Member]

10.25% Fixed Senior Notes due November 1, 2015 [Member]

10.25% Fixed Senior Notes due November 1, 2015, Series B [Member]

10.25% Fixed Senior Notes due November 1, 2015, Series B [Member]

10.50 / 11.25% Senior Toggle Notes due November 1, 2016 [Member]

10.50 / 11.25% Senior Toggle Notes due November 1, 2016 [Member]

7% Fixed Senior Notes due March 15, 2013 [Member]

7% Fixed Senior Notes due March 15, 2013 [Member]

TCEH Term Loan Facilities maturing October 10, 2014 [Member]

TCEH Term Loan Facilities maturing October 10, 2014 [Member]

Term Loan Facilities maturing October 2014 [Member]

Term Loan Facilities maturing from October 2014 through October 2017 [Member]

TCEH Term Loan Facilities maturing October 10, 2017 [Member]

TCEH Term Loan Facilities maturing October 10, 2017 [Member]

Letter of Credit Facility maturing October 2014 [Member]

Letter of Credit Facility maturing October 2014 [Member]

TCEH Letter of Credit Facility maturing October 10, 2017 [Member]

TCEH Letter of Credit Facility maturing October 10, 2017 [Member]

5.40% Fixed Series 1994A due May 1, 2029 [Member]

5.40% Fixed Series 1994A due May 1, 2029 [Member]

7.70% Fixed Series 1999A due April 1, 2033 [Member]

7.70% Fixed Series 1999A due April 1, 2033 [Member]

6.75% Fixed Series 1999B due September 1, 2034, remarketing date April 1, 2013 [Member]

6.75% Fixed Series 1999B due September 1, 2034, remarketing date April 1, 2013 [Member]

7.70% Fixed Series 1999C due March 1, 2032 [Member]

7.70% Fixed Series 1999C due March 1, 2032 [Member]

8.25% Fixed Series 2001A due October 1, 2030 [Member]

8.25% Fixed Series 2001A due October 1, 2030 [Member]

8.25% Fixed Series 2001D-1 due May 1, 2033 [Member]

8.25% Fixed Series 2001D-1 due May 1, 2033 [Member]

Floating Series 2001D-2 due May 1, 2033 [Member]

Floating Series 2001D-2 due May 1, 2033 [Member]

Floating Taxable Series 2001I due December 1, 2036 [Member]

Floating Taxable Series 2001I due December 1, 2036 [Member]

Floating Series 2002A due May 1, 2037 [Member]

Floating Series 2002A due May 1, 2037 [Member]

6.75% Fixed Series 2003A due April 1, 2038, remarketing date April 1, 2013 [Member]

6.75% Fixed Series 2003A due April 1, 2038, remarketing date April 1, 2013 [Member]

6.30% Fixed Series 2003B due July 1, 2032 [Member]

6.30% Fixed Series 2003B due July 1, 2032 [Member]

6.75% Fixed Series 2003C due October 1, 2038 [Member]

6.75% Fixed Series 2003C due October 1, 2038 [Member]

5.40% Fixed Series 2003D due October 1, 2029, remarketing date October 1, 2014 [Member]

5.40% Fixed Series 2003D due October 1, 2029, remarketing date October 1, 2014 [Member]

5.00% Fixed Series 2006 due March 1, 2041 [Member]

5.00% Fixed Series 2006 due March 1, 2041 [Member]

6.45% Fixed Series 2000A due June 1, 2021 [Member]

6.45% Fixed Series 2000A due June 1, 2021 [Member]

5.20% Fixed Series 2001C due May 1, 2028 [Member]

5.20% Fixed Series 2001C due May 1, 2028 [Member]

5.80% Fixed Series 2003A due July 1, 2022 [Member]

5.80% Fixed Series 2003A due July 1, 2022 [Member]

6.15% Fixed Series 2003B due August 1, 2022 [Member]

6.15% Fixed Series 2003B due August 1, 2022 [Member]

6.25% Fixed Series 200A due May 1, 2028 [Member]

6.25% Fixed Series 200A due May 1, 2028 [Member]

Fixed 7.48% Secured Facility Bonds With Amortizing Payments Through January 2017 [Member]

Fixed 7.48% Secured Facility Bonds With Amortizing Payments Through January 2017 [Member]

Fixed 7.48% Secured Facility Bonds With Amortizing Payments Through January 2017 [Member]

7.46% Fixed Secured Facility Bonds with amortizing payments through January 2015 [Member]

7.46% Fixed Secured Facility Bonds with amortizing payments through January 2015 [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Fixed Senior Notes [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Brazos River Authority [Member]

Sabine River Authority of Texas [Member]

Sabine River Authority of Texas [Member]

Sabine River Authority of Texas [Member]

Sabine River Authority of Texas [Member]

Sabine River Authority of Texas [Member]

Sabine River Authority of Texas [Member]

Sabine River Authority of Texas [Member]

Sabine River Authority of Texas [Member]

Trinity River Authority of Texas [Member]

Trinity River Authority of Texas [Member]

11.25 / 12.00% Senior Toggle Notes due November 1, 2017 [Member]

10.50 / 11.25% Senior Toggle Notes due November 1, 2016 [Member]

11.25 / 12.00% Senior Toggle Notes due November 1, 2017 [Member]

10.50 / 11.25% Senior Toggle Notes due November 1, 2016 [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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Derivative, Notional Amount

'

'

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'

'

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'

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'

'

'

'

'

'

'

'

'

'

'

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'

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'

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'

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'

'

'

'

'

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'

'

$18,140

$12,600

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, gross

'

'

'

'

'

'

35

[1]

35

[1]

35

[1]

39

[1]

1

[2]

1

[2]

8

8

'

'

0

[3]

330

[3]

0

[3]

58

[3]

16

[3]

32

[3]

14

[3]

30

[3]

'

'

'

'

1,571

1,750

1,750

336

336

1,235

1,235

5,237

'

2,046

[4]

2,046

[4]

1,442

[4]

1,442

[4]

1,749

1,749

0

5

22,635

3,809

3,809

[2],[5]

'

'

15,710

[2],[4],[5]

15,370

[2],[4],[5]

42

[2]

42

[2]

1,020

[2]

1,020

[2]

39

39

111

111

0

[6]

16

[6]

50

50

71

71

171

171

97

[7]

97

[7]

62

[8]

62

[8]

45

[7]

45

[7]

0

[6]

44

[6]

39

39

52

52

31

[6]

31

[6]

100

100

51

51

70

70

12

12

45

45

14

14

36

45

0

4

12

'

'

'

'

Capital lease obligations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

56

64

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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Other

'

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'

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'

'

'

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'

3

3

'

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'

'

'

'

'

'

'

Unamortized discount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-110

-10

'

'

'

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'

'

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'

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'

'

'

'

'

'

'

'

'

'

Unamortized fair value premium (discount)

'

'

'

'

-6

[9]

-7

[9]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

[9]

-1

[9]

-107

[9]

-112

[9]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

'

'

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'

'

'

'

'

'

'

'

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'

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'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt and capital lease obligations

103

526

30,184

30,406

73

76

'

'

'

'

'

'

'

'

30

[3]

450

[3]

'

'

'

'

'

'

'

'

30,081

29,880

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

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'

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'

'

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'

'

'

Long-term debt due currently

-32

-96

'

'

-11

-11

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

'

'

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'

'

'

'

'

'

'

Less amount held by affiliates (Note 11)

-382

-382

'

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

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'

'

'

-382

-382

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total long-term debt

$29,770

$29,928

'

'

$92

$515

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stated interest rate (as a percent)

'

'

'

'

'

'

9.58%

[1]

'

8.25%

[1]

'

'

'

8.18%

'

'

'

10.00%

[3]

'

9.75%

[3]

'

10.88%

[3]

'

'

'

'

'

'

'

'

11.50%

'

15.00%

'

15.00%

'

'

'

10.25%

[4]

'

10.25%

[4]

'

'

'

7.00%

'

'

'

'

'

'

'

'

'

'

'

'

5.40%

'

7.70%

'

6.75%

[6]

'

7.70%

'

8.25%

'

8.25%

'

'

'

'

'

'

'

6.75%

[6]

'

6.30%

'

6.75%

'

5.40%

[4]

'

5.00%

'

6.45%

'

5.20%

'

5.80%

'

6.15%

'

6.25%

'

7.48%

'

'

7.46%

'

'

'

'

'

Effective interest rate (as a percent)

'

'

'

'

'

'

'

'

'

'

1.07%

[10]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8.90%

[7]

'

21.00%

[8]

'

8.90%

[11]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

11.25%

[3]

10.50%

12.00%

11.25%

Interest rate at period end (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.71%

[2],[4],[5]

'

'

'

4.71%

[2],[4],[5]

'

3.68%

[2]

'

4.68%

[2]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of securities guaranteed by and push down debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

EFCH's obligations with respect to these financings are guaranteed by EFH Corp. and secured on a first-priority basis by, among other things, an undivided interest in the Comanche Peak nuclear generation facility.

[2]

Interest rates in effect at September 30, 2013.

[3]

Represents 50% of the amount of these EFH Corp. securities guaranteed by, and pushed down to (pushed-down debt), EFCH (parent entity) per the discussion below under "Guarantees and Push Down of EFH Corp. Debt."

[4]

As discussed below and in Note 11, principal amounts of notes/term loans totaling $382 million at both September 30, 2013 and December 31, 2012 were held by EFH Corp. and EFIH.

[5]

Interest rate swapped to fixed on $18.140 billion principal amount of maturities through October 2014 and up to an aggregate $12.6 billion principal amount from October 2014 through

[6]

These series are in the multiannual interest rate mode and are subject to mandatory tender prior to maturity on the mandatory remarketing date. On such date, the interest rate and interest rate period will be reset for the bonds.

[7]

Interest rates in effect at September 30, 2013. These series are in a daily interest rate mode and are classified as long-term as they are supported by long-term irrevocable letters of credit.

[8]

Interest rate in effect at September 30, 2013. This series is in a weekly interest rate mode and is classified as long-term as it is supported by long-term irrevocable letters of credit.

[9]

Amount represents unamortized fair value adjustments recorded under purchase accounting.

[10]

Facility, $42 million of which matures in October 2014, used for issuing letters of credit for general corporate purposes, including, but not limited to, providing collateral support under hedging arrangements and other commodity transactions that are not secured by a first-lien interest in the assets of TCEH. The borrowings under this facility have been recorded by TCEH as restricted cash that supports issuances of letters of credit and are classified as long-term debt. At September 30, 2013, the restricted cash totaled $947 million, after reduction for a $115 million letter of credit drawn in 2009 related to an office building financing. At September 30, 2013, the restricted cash supports $776 million in letters of credit outstanding, leaving $171 million in available letter of credit capacity.

[11]

Based on historical forward price changes.

ShortTerm_Borrowings_And_LongT5

Short-Term Borrowings And Long-Term Debt (Debt Related Activity) (Details) (USD $)

9 Months Ended

9 Months Ended

1 Months Ended

9 Months Ended

1 Months Ended

1 Months Ended

1 Months Ended

1 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Jan. 31, 2013

Sep. 30, 2013

Jan. 31, 2013

Jan. 31, 2013

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Apr. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jun. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Jan. 31, 2013

Dec. 31, 2012

Jan. 31, 2013

Sep. 30, 2013

Dec. 31, 2012

Jan. 31, 2013

Jan. 31, 2013

Sep. 30, 2013

Dec. 31, 2012

Jan. 31, 2013

Sep. 30, 2013

Dec. 31, 2012

Jan. 31, 2013

Jan. 31, 2013

Jan. 31, 2013

Jan. 31, 2013

Jan. 31, 2013

Jan. 31, 2013

Senior Secured Debt [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Fixed 7.48% Secured Facility Bonds With Amortizing Payments Through January 2017 [Member]

Fixed 7.48% Secured Facility Bonds With Amortizing Payments Through January 2017 [Member]

Fixed 7.48% Secured Facility Bonds With Amortizing Payments Through January 2017 [Member]

11.5% Fixed Senior Secured Notes due October 1, 2020 [Member]

11.5% Fixed Senior Secured Notes due October 1, 2020 [Member]

11.25 / 12.00% Senior Toggle Notes due November 1, 2017 [Member]

11.25 / 12.00% Senior Toggle Notes due November 1, 2017 [Member]

11.25 / 12.00% Senior Toggle Notes due November 1, 2017 [Member]

10.875% Fixed Senior Notes due November 1, 2017 [Member]

10.875% Fixed Senior Notes due November 1, 2017 [Member]

10.875% Fixed Senior Notes due November 1, 2017 [Member]

Toggle Notes [Member]

10% Fixed Senior Secured First Lien Notes due January 15, 2020 [Member]

10% Fixed Senior Secured First Lien Notes due January 15, 2020 [Member]

10% Fixed Senior Secured First Lien Notes due January 15, 2020 [Member]

9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member]

9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member]

9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member]

5.55% Fixed Series P Senior Notes due November 15, 2014 [Member]

10% Senior Secured Notes Due 2020 [Member]

9.75% Senior Secured Notes Due 2019 [Member]

11.25%/12.25% Senior Toggle Notes Due 2018 [Member]

10.875% Senior Notes due 2017 [Member]

Related Party Transactions, Returned Debt as Dividend [Member]

Senior Notes [Member]

Senior Secured Debt [Member]

Senior Notes [Member]

Fixed Secured Facility Bonds [Member]

Line of Credit [Member]

Senior Secured Debt [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Intermediate Holding CO LLC [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Intermediate Holding CO LLC [Member]

Energy Future Intermediate Holding CO LLC [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Intermediate Holding CO LLC [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Intermediate Holding CO LLC [Member]

Energy Future Intermediate Holding CO LLC [Member]

Energy Future Intermediate Holding CO LLC [Member]

Energy Future Holdings Corp. [Member]

Senior Notes [Member]

Fixed Secured Facility Bonds [Member]

Fixed Secured Facility Bonds [Member]

Fixed Secured Facility Bonds [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Notes [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Notes [Member]

Senior Notes [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Debt, Gross

'

'

'

'

'

'

'

'

'

'

'

$5,237,000,000

'

$22,635,000,000

$1,571,000,000

$36,000,000

$45,000,000

$0

$1,750,000,000

$1,750,000,000

$14,000,000

[1]

'

$30,000,000

[1]

'

$16,000,000

[1]

$32,000,000

[1]

'

'

$0

[1]

$330,000,000

[1]

'

$0

[1]

$58,000,000

[1]

'

$1,302,000,000

'

$89,000,000

'

'

Short-term borrowings

2,226,000,000

'

2,136,000,000

'

'

'

'

0

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument, issued face amount

'

'

'

1,058,000,000

1,266,000,000

95,000,000

1,310,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

33,000,000

'

'

'

'

'

'

'

'

'

'

'

31,000,000

'

139,000,000

'

31,000,000

'

Debt Instrument, Principal Amounts Cancelled

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6,360,000,000

Repurchases of long-term debt

94,000,000

30,000,000

'

'

'

'

'

3,000,000

4,000,000

'

'

'

17,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repayments of principal at scheduled maturity dates

86,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

3,474,000,000

1,058,000,000

'

'

113,000,000

'

'

'

'

'

'

'

'

Repayments of contractual payments under capitalized lease obligations

8,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Decrease in other short-term borrowings (Note 5)

0

-385,000,000

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquisition of combustion turbine trust interest

-40,000,000

'

'

'

'

'

'

0

'

'

40,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Combustion Turbine Asset Acquired, Fair Value

'

'

'

'

'

'

'

'

'

'

83,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred Lease Liability and and Unamortized Lease Valuation Reserve

'

'

'

'

'

'

'

'

'

'

$18,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Represents 50% of the amount of these EFH Corp. securities guaranteed by, and pushed down to (pushed-down debt), EFCH (parent entity) per the discussion below under "Guarantees and Push Down of EFH Corp. Debt."

ShortTerm_Borrowings_And_LongT6

Short-Term Borrowings And Long-Term Debt (Guarantees and Push Down of EFH Corp. Debt) (Details) (USD $)

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

In Millions, unless otherwise specified

Push Down Debt [Member]

Push Down Debt [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Financial guarantee [Member]

Push Down Debt [Member]

Push Down Debt [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Energy Future Competitive Holdings Company [Member]

Senior Notes And Demand Notes Payable [Member]

Senior Notes And Demand Notes Payable [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Demand Notes Payable [Member]

Demand Notes Payable [Member]

Held By EFIH [Member]

Held By EFIH [Member]

Held By EFIH [Member]

Held By EFIH [Member]

Held By EFIH [Member]

Subject to Push Down [Member]

Subject to Push Down [Member]

Subject to Push Down [Member]

Subject to Push Down [Member]

Subject to Push Down [Member]

Not Merger-Related [Member]

Not Merger-Related [Member]

Not Merger-Related [Member]

Not Merger-Related [Member]

Not Merger-Related [Member]

Not Merger-Related [Member]

Not Merger-Related [Member]

Not Merger-Related [Member]

Not Merger-Related [Member]

Not Merger-Related [Member]

EFH Corp. 9.75% and 10% Senior Secured Notes [Member]

Fixed Senior Secured 9.75% First Lien Notes due October 15, 2019 [Member]

EFH Corp. 10.875% Senior Notes [Member]

EFH Corp. 11.25 / 12.00% Senior Toggle Notes [Member]

TCEH Demand Notes [Member]

TCEH Demand Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

EFH Corp. 9.75% and 10% Senior Secured Notes [Member]

Fixed Senior Secured 9.75% First Lien Notes due October 15, 2019 [Member]

EFH Corp. 10.875% Senior Notes [Member]

EFH Corp. 11.25 / 12.00% Senior Toggle Notes [Member]

EFH Corp. 9.75% and 10% Senior Secured Notes [Member]

Fixed Senior Secured 9.75% First Lien Notes due October 15, 2019 [Member]

EFH Corp. 10.875% Senior Notes [Member]

EFH Corp. 11.25 / 12.00% Senior Toggle Notes [Member]

EFH Corp. 9.75% and 10% Senior Secured Notes [Member]

EFH Corp. 9.75% and 10% Senior Secured Notes [Member]

Fixed Senior Secured 9.75% First Lien Notes due October 15, 2019 [Member]

Fixed Senior Secured 9.75% First Lien Notes due October 15, 2019 [Member]

EFH Corp. 10.875% Senior Notes [Member]

EFH Corp. 10.875% Senior Notes [Member]

EFH Corp. 11.25 / 12.00% Senior Toggle Notes [Member]

EFH Corp. 11.25 / 12.00% Senior Toggle Notes [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt and Capital Lease Obligations

$103

$526

$30

$450

'

'

'

'

$73

$76

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Securities Guaranteed (principal amounts)

'

'

'

'

'

'

'

'

'

'

'

'

6,426

115

1,061

1,749

3,501

'

'

5,126

0

0

1,685

3,441

900

115

661

64

60

'

400

'

0

'

400

'

0

'

0

Intercompany payables

'

'

'

'

92

81

'

'

'

'

'

'

'

'

'

'

'

'

698

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total

'

'

'

'

'

'

'

'

'

'

'

7,124

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Principal Amounts Cancelled

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6,360

'

113

'

1,058

'

1,715

'

3,474

'

Debt Instrument, Principal Amount Guarantee Obligations Of Subsidiaries Before Principal Amounts Cancelled

'

'

'

'

'

'

'

'

'

'

$60

'

'

'

'

'

'

$0

'

'

'

'

'

'

'

'

'

'

'

$60

'

$0

'

$0

'

$33

'

$27

'

Debt Instrument, Percentage of principal plus unamortized premium of Parent Merger-related debt guaranteed by subsidiary

'

'

'

'

'

'

50.00%

50.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

ShortTerm_Borrowings_And_LongT7

Short-Term Borrowings And Long-Term Debt (Information Regarding Other Significant Outstanding Debt) (Details) (USD $)

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Jan. 31, 2013

Jan. 31, 2013

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Subsequent Event [Member]

Subsequent Event [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Line of Credit [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Secured Debt [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Notes [Member]

Letter of Credit [Member]

Letter of Credit [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

TCEH Term Loan Facilities maturing October 10, 2014 [Member]

TCEH Term Loan Facilities maturing October 10, 2014 [Member]

TCEH Term Loan Facilities maturing October 10, 2017 [Member]

TCEH Term Loan Facilities maturing October 10, 2017 [Member]

11.5% Fixed Senior Secured Notes due October 1, 2020 [Member]

11.5% Fixed Senior Secured Notes due October 1, 2020 [Member]

Consolidation, Eliminations [Member]

10.25% Fixed Senior Notes due November 1, 2015 [Member]

10.25% Fixed Senior Notes due November 1, 2015 [Member]

10.50 / 11.25% Senior Toggle Notes due November 1, 2016 [Member]

10.50 / 11.25% Senior Toggle Notes due November 1, 2016 [Member]

TCEH Letter of Credit Facility maturing October 10, 2017 [Member]

TCEH Letter of Credit Facility maturing October 10, 2017 [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Financial guarantee [Member]

Revolving Credit Facility maturing October 2013 Extended to October 2016 [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Maximum Borrowing Capacity

'

$3,116

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$2,054

$645

Basis Spread on LIBOR Rate (as a percent)

'

'

'

3.50%

'

4.50%

'

'

'

'

'

'

'

'

'

'

4.50%

'

'

'

Debt Instrument, Springing maturity provision pursuant if in the event that aggregate principal amount to the extent held at the determination date, Exceeds Minimum

'

'

'

'

'

'

'

'

'

'

'

'

500

'

150

'

'

'

'

'

Long-term debt, gross

'

'

$22,635

$3,809

$3,809

[1],[2]

$15,710

[1],[2],[3]

$15,370

[1],[2],[3]

$1,571

$1,750

$1,750

$5,237

$363

$2,046

[3]

$2,046

[3]

$1,749

$1,749

$1,020

[1]

$1,020

[1]

'

'

Ownership interest (as a percent)

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Springing maturity provision, remaining outstanding days prior to maturity

'

'

'

'

'

'

'

'

'

'

'91 days

'

'

'

'

'

'

'

'

'

Total debt to Adjusted EBITDA ratio at Determination Date

'

'

'

'

'

'

'

'

'

'

6

'

'

'

'

'

'

'

'

'

Debt Instrument, Springing maturity provision, remaining outstanding days prior to maturity automatic extention if Adjusted EBITDA ratio at determination date

'

'

'

'

'

'

'

'

'

'

'90 days

'

'

'

'

'

'

'

'

'

[1]

Interest rates in effect at September 30, 2013.

[2]

Interest rate swapped to fixed on $18.140 billion principal amount of maturities through October 2014 and up to an aggregate $12.6 billion principal amount from October 2014 through

[3]

As discussed below and in Note 11, principal amounts of notes/term loans totaling $382 million at both September 30, 2013 and December 31, 2012 were held by EFH Corp. and EFIH.

ShortTerm_Borrowings_And_LongT8

Short-Term Borrowings And Long-Term Debt (Fair Value of Long-Term Debt) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Carrying Amount [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Long-term debt (including current maturities)	$30,128	$30,342
Level 2 [Member] | Fair Value [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Long-term debt (including current maturities)	15,873	17,858
Texas Competitive Electric Holdings Company LLC [Member] | Level 2 [Member] | Fair Value [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Lines of Credit, Fair Value Disclosure	$1,371	$1,500

ShortTerm_Borrowings_And_LongT9

Short-Term Borrowings And Long-Term Debt (TCEH Interest Rate Swap Transactions) (Details) (USD $)	3 Months Ended			9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Derivative [Line Items]	'		'	'		'	'
Unrealized net gain (loss)	$413		($20)	$899		($16)	'
Interest rate swaps [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Derivative, Notional Amount	30,740	[1]	'	30,740	[1]	'	31,060	[1]
Interest rate swaps [Member] | Texas Competitive Electric Holdings Company LLC [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Accumulated Unrealized Gain (Loss) On Interest Rate Derivative Instruments Not Designated As Hedging Instruments Net Of Nonperformance Risk Adjustments	1,167		'	1,167		'	'
Realized net loss	-160		-168	-466		-505	'
Unrealized net gain (loss)	413		-20	899		-16	'
Total	253		-188	433		-521	'
Accumulated unrealized gain (loss) on interest rate derivative instruments not designated as hedging instruments	1,520		'	1,520		'	2,065
Accumulated unrealized gain (loss) on interest rate derivative instruments not designated as hedges Other Comprehensive Income, pre-tax	57		'	57		'	65
Interest rate swaps [Member] | Texas Competitive Electric Holdings Company LLC [Member] | October 2012 through October 2014 [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Derivative, Notional Amount	18,140	[2]	'	18,140	[2]	'	'
Interest rate swaps [Member] | Texas Competitive Electric Holdings Company LLC [Member] | October 2015 through October 2017 [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Derivative, Notional Amount	12,600	[3]	'	12,600	[3]	'	'
Interest rate swaps [Member] | Texas Competitive Electric Holdings Company LLC [Member] | Expires in October 2015 and the remainder in October 2017 [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Derivative, Notional Amount	3,000		'	3,000		'	'
Interest rate swaps [Member] | Texas Competitive Electric Holdings Company LLC [Member] | Minimum [Member] | October 2012 through October 2014 [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Swap interest rate (as a percent)	5.50%	[2]	'	5.50%	[2]	'	'
Interest rate swaps [Member] | Texas Competitive Electric Holdings Company LLC [Member] | Minimum [Member] | October 2015 through October 2017 [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Swap interest rate (as a percent)	6.80%	[3]	'	6.80%	[3]	'	'
Interest rate swaps [Member] | Texas Competitive Electric Holdings Company LLC [Member] | Maximum [Member] | October 2012 through October 2014 [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Swap interest rate (as a percent)	9.30%	[2]	'	9.30%	[2]	'	'
Interest rate swaps [Member] | Texas Competitive Electric Holdings Company LLC [Member] | Maximum [Member] | October 2015 through October 2017 [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Swap interest rate (as a percent)	0.00%	[3]	'	0.00%	[3]	'	'
Basis swap [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Derivative, Notional Amount	11,967		'	11,967		'	11,967
Basis swap [Member] | Texas Competitive Electric Holdings Company LLC [Member] | October 2012 through October 2014 [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Derivative, Notional Amount	11,967		'	11,967		'	'
Debt obligation expiring in 2012 [Member] | Interest rate swaps [Member] | Texas Competitive Electric Holdings Company LLC [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Long-term debt, gross	1,600		'	1,600		'	'
Increase in notional amount of swaps during period [Member] | Interest rate swaps [Member] | Texas Competitive Electric Holdings Company LLC [Member]	'		'	'		'	'
Derivative [Line Items]	'		'	'		'	'
Change in notional amount of interest rate derivatives	'		'	$1,280		'	'
[1]	Includes notional amount of interest rate swaps with maturity dates through October 2014 as well as notional amount of swaps effective from October 2014 with maturity dates through October 2017 (see Note 5).
[2]	Swaps related to an aggregate $1.6 billion principal amount of debt expired in 2013. Per the terms of the transactions, the notional amount of swaps entered into in 2011 grew by $1.280 billion in 2013, substantially offsetting the expired swaps.
[3]	These swaps are effective from October 2014 through October 2017. The $12.6 billion notional amount of swaps includes $3 billion that expires in October 2015 with the remainder expiring in October 2017.

Commitments_And_Contingencies_

Commitments And Contingencies (Narrative) (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Feb. 29, 2012
In Millions, unless otherwise specified	Texas Competitive Electric Holdings Company LLC [Member]	Texas Competitive Electric Holdings Company LLC [Member]	Financial Standby Letter of Credit [Member]	Financial Standby Letter of Credit [Member]	Financial Standby Letter of Credit [Member]	Financial Standby Letter of Credit [Member]	Financial Standby Letter of Credit [Member]	CSAPR [Member]
		Debt obligation expiring in 2014 [Member]	Texas Competitive Electric Holdings Company LLC [Member]	Texas Competitive Electric Holdings Company LLC [Member]	Texas Competitive Electric Holdings Company LLC [Member]	Texas Competitive Electric Holdings Company LLC [Member]	Texas Competitive Electric Holdings Company LLC [Member]
				Support risk management and trading margin requirements, including over-the-counter hedging transactions and collateral postings with ERCOT [Member]	Support floating rate pollution control revenue bond debt [Member]	Support Retail Electric Provider's financial requirements with the PUCT [Member]	Miscellaneous credit support requirements [Member]
Commitments and Contingencies [Line Items]	'	'	'	'	'	'	'	'
Letters of Credit	$0	'	$776	$353	$208	$65	$150	'
Long-term debt, gross	'	$204	'	'	'	'	'	'
Emissions budget generation assets lower sulfur dioxide requirements (as a percent)	'	'	'	'	'	'	'	6.00%
Emissions budget generation assets higher annual nitrogen oxides requirements (as a percent)	'	'	'	'	'	'	'	3.00%
Emissions budget generation assets higher seasonal nitrogen oxides requirements (as a percent)	'	'	'	'	'	'	'	2.00%

Equity_Narrative_Details

Equity (Narrative) (Details) (Texas Competitive Electric Holdings Company LLC [Member])	Sep. 30, 2013
Texas Competitive Electric Holdings Company LLC [Member]	'
Equity	'
Consolidated total debt to Adjusted EBITDA ratio related to dividend restrictions, threshold ratio (as a ratio)	6.5
Consolidated total debt to Adjusted EBITDA ratio related to dividend restrictions, actual ratio (as a ratio)	10.6

Equity_Equity_Details

Equity (Equity) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'		'
Beginning Balance	'	'	($10,394)		($7,716)
Net loss	'	'	-686		-1,298
Gain on settlement of reimbursement agreement with Oncor (Note 11)	'	'	'		2
Effect of stock-based incentive compensation plans	'	'	'		6
Net effect of cash flow hedges	1	1	5		5
Investment by noncontrolling interests	'	'	3		6
Effect of debt push-down from EFH Corp. (a)	'	'	437	[1]	30	[1]
Other	'	'	'		0
Ending Balance	-10,643	-8,965	-10,643		-8,965
Common Stock [Member]	'	'	'		'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'		'
Beginning Balance	'	'	7,665		7,351
Net loss	'	'	0		0
Gain on settlement of reimbursement agreement with Oncor (Note 11)	'	'	'		2
Effect of stock-based incentive compensation plans	'	'	'		6
Net effect of cash flow hedges	'	'	0		0
Investment by noncontrolling interests	'	'	0		0
Effect of debt push-down from EFH Corp. (a)	'	'	434	[1]	30	[1]
Other	'	'	'		-1
Ending Balance	0	7,388	0		7,388
Retained Earnings [Member]	'	'	'		'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'		'
Beginning Balance	'	'	-18,129		-15,121
Net loss	'	'	-526		-1,298
Gain on settlement of reimbursement agreement with Oncor (Note 11)	'	'	'		0
Effect of stock-based incentive compensation plans	'	'	'		0
Net effect of cash flow hedges	'	'	0		0
Investment by noncontrolling interests	'	'	0		0
Effect of debt push-down from EFH Corp. (a)	'	'	0		0
Other	'	'	'		0
Ending Balance	0	-16,419	0		-16,419
Membership Interests [Member]	'	'	'		'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'		'
Beginning Balance	'	'	0		'
Net loss	'	'	-160		'
Net effect of cash flow hedges	'	'	0		'
Investment by noncontrolling interests	'	'	0		'
Effect of debt push-down from EFH Corp. (a)	'	'	3		'
Ending Balance	-10,711	'	-10,711		'
Accumulated Other Comprehensive Income (Loss) [Member]	'	'	'		'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'		'
Beginning Balance	'	'	-42		-49
Net loss	'	'	0		0
Gain on settlement of reimbursement agreement with Oncor (Note 11)	'	'	'		0
Effect of stock-based incentive compensation plans	'	'	'		0
Net effect of cash flow hedges	'	'	5		5
Investment by noncontrolling interests	'	'	0		0
Effect of debt push-down from EFH Corp. (a)	'	'	0		0
Other	'	'	'		0
Ending Balance	-37	-44	-37		-44
Noncontrolling Interest [Member]	'	'	'		'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'		'
Beginning Balance	'	'	112		103
Net loss	'	'	0		0
Gain on settlement of reimbursement agreement with Oncor (Note 11)	'	'	'		0
Effect of stock-based incentive compensation plans	'	'	'		0
Net effect of cash flow hedges	'	'	0		0
Investment by noncontrolling interests	'	'	3		6
Effect of debt push-down from EFH Corp. (a)	'	'	0		0
Other	'	'	'		1
Ending Balance	$105	$110	$105		$110
[1]	Represents the interest and income tax effects of debt pushed down from EFH Corp. (Note 5).

Fair_Value_Measurements_Schedu

Fair Value Measurements (Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Millions, unless otherwise specified
Assets:	'		'
Nuclear decommissioning trust	$737		$654
Equity securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	471	[1]	393	[1]
Debt securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	266	[2]	261	[2]
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]	'		'
Assets:	'		'
Total assets	439		429
Liabilities:	'		'
Total liabilities	129		208
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Equity securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	299	[3]	249
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Debt securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	'		0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Commodity contracts [Member]	'		'
Assets:	'		'
Derivative Assets	140		180
Liabilities:	'		'
Derivative Liabilities	129		208
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Interest rate swaps [Member]	'		'
Assets:	'		'
Derivative Assets	0		0
Liabilities:	'		'
Derivative Liabilities	0		0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]	'		'
Assets:	'		'
Total assets	1,380		2,191
Liabilities:	'		'
Total liabilities	26		2,188
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Equity securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	172	[3]	144
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Debt securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	266		261
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Commodity contracts [Member]	'		'
Assets:	'		'
Derivative Assets	941		1,784
Liabilities:	'		'
Derivative Liabilities	26		121
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Interest rate swaps [Member]	'		'
Assets:	'		'
Derivative Assets	1		2
Liabilities:	'		'
Derivative Liabilities	'		2,067
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]	'		'
Assets:	'		'
Total assets	48	[4]	83	[4]
Liabilities:	'		'
Total liabilities	1,219	[4]	54	[4]
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Equity securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	0	[3],[4]	0	[4]
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Debt securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	0	[4]	0	[4]
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Commodity contracts [Member]	'		'
Assets:	'		'
Derivative Assets	48	[4]	83	[4]
Liabilities:	'		'
Derivative Liabilities	52	[4]	54	[4]
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Interest rate swaps [Member]	'		'
Assets:	'		'
Derivative Assets	0	[4]	0	[4]
Liabilities:	'		'
Derivative Liabilities	1,167	[4]	0	[4]
Fair Value, Measurements, Recurring [Member] | Reclassification	'		'
Assets:	'		'
Total assets	2	[5]	'
Liabilities:	'		'
Total liabilities	2	[5]	'
Fair Value, Measurements, Recurring [Member] | Reclassification | Equity securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	'	[3],[5]	'
Fair Value, Measurements, Recurring [Member] | Reclassification | Debt securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	'	[5]	'
Fair Value, Measurements, Recurring [Member] | Reclassification | Commodity contracts [Member]	'		'
Assets:	'		'
Derivative Assets	2	[5]	'
Liabilities:	'		'
Derivative Liabilities	2	[5]	'
Fair Value, Measurements, Recurring [Member] | Reclassification | Interest rate swaps [Member]	'		'
Assets:	'		'
Derivative Assets	0	[5]	'
Liabilities:	'		'
Derivative Liabilities	'	[5]	'
Fair Value, Measurements, Recurring [Member] | Total [Member]	'		'
Assets:	'		'
Total assets	1,869		2,703
Liabilities:	'		'
Total liabilities	1,376		2,450
Fair Value, Measurements, Recurring [Member] | Total [Member] | Equity securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	471	[3]	393
Fair Value, Measurements, Recurring [Member] | Total [Member] | Debt securities [Member]	'		'
Assets:	'		'
Nuclear decommissioning trust	266		261
Fair Value, Measurements, Recurring [Member] | Total [Member] | Commodity contracts [Member]	'		'
Assets:	'		'
Derivative Assets	1,131		2,047
Liabilities:	'		'
Derivative Liabilities	209		383
Fair Value, Measurements, Recurring [Member] | Total [Member] | Interest rate swaps [Member]	'		'
Assets:	'		'
Derivative Assets	1		2
Liabilities:	'		'
Derivative Liabilities	$1,167		$2,067
[1]	The investment objective for equity securities is to invest tax efficiently and to match the performance of the S&P 500 Index.
[2]	The investment objective for debt securities is to invest in a diversified tax efficient portfolio with an overall portfolio rating of AA or above as graded by S&P or Aa2 by Moody's Investors Services, Inc. The debt securities are heavily weighted with municipal bonds. The debt securities had an average coupon rate of 3.97% and 4.38% at September 30, 2013 and December 31, 2012, respectively, and an average maturity of 6 years at both September 30, 2013 and December 31, 2012.
[3]	The nuclear decommissioning trust investment is included in the investments line in the balance sheet. See Note 12.
[4]	See table below for description of Level 3 assets and liabilities.
[5]	Includes unrealized mark-to-market net gain (loss) as well as the net realized effect on interest paid/accrued, both reported in "Interest Expense and Related Charges" (see Note 12).

Fair_Value_Measurements_Schedu1

Fair Value Measurements (Schedule of Fair Value of the Level 3 Assets and Liabilities by Major Contract Type (All Related to Commodity Contracts) and the Significant Unobservable Inputs Used in the Valuations) (Details) (Derivative financial instruments, assets and liabilities [Member], Level 3 [Member], USD $)	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Assets	$48,000,000	[1]	$83,000,000	[1]
Liabilities	-1,219,000,000	[1]	-54,000,000	[1]
Derivative Assets (Liabilities), at Fair Value, Net	-1,171,000,000	[1]	29,000,000	[1]
Electricity purchases and sales [Member] | Valuation Model [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Assets	5,000,000	[1]	5,000,000	[1]
Liabilities	-2,000,000	[1]	-9,000,000	[1]
Derivative Assets (Liabilities), at Fair Value, Net	3,000,000	[1]	-4,000,000	[1]
Electricity spread options [Member] | Option Pricing Model [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Assets	0	[1]	34,000,000	[1]
Liabilities	-19,000,000	[1]	-10,000,000	[1]
Derivative Assets (Liabilities), at Fair Value, Net	-19,000,000	[1]	24,000,000	[1]
Electricity congestion revenue rights [Member] | Market Approach [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Assets	37,000,000	[1],[2]	41,000,000	[1],[2]
Liabilities	-5,000,000	[1],[2]	-2,000,000	[1],[2]
Derivative Assets (Liabilities), at Fair Value, Net	32,000,000	[1],[2]	39,000,000	[1],[2]
Coal purchases [Member] | Market Approach [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Assets	1,000,000	[1],[2]	0	[1],[2]
Liabilities	-12,000,000	[1],[2]	-32,000,000	[1],[2]
Derivative Assets (Liabilities), at Fair Value, Net	-11,000,000	[1],[2]	-32,000,000	[1],[2]
Interest rate swaps [Member] | Market Approach [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Assets	0	[1]	'
Liabilities	-1,167,000,000	[1]	'
Derivative Assets (Liabilities), at Fair Value, Net	-1,167,000,000	[1]	'
Other [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Assets	5,000,000	[1]	3,000,000	[1]
Liabilities	-14,000,000	[1]	-1,000,000	[1]
Derivative Assets (Liabilities), at Fair Value, Net	-9,000,000	[1]	2,000,000	[1]
Minimum [Member] | Electricity purchases and sales [Member] | Valuation Model [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Illiquid pricing locations (in usd per MWh)	30	[1],[3],[4]	20	[1],[3],[4]
Hourly price curve shape (in usd per MWh)	20	[1],[3],[5]	20	[1],[3],[5]
Minimum [Member] | Electricity spread options [Member] | Option Pricing Model [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Gas to power correlation (as a percent)	45.00%	[1],[3],[6]	20.00%	[1],[3],[6]
Power volatility (as a percent)	10.00%	[1],[3],[7]	20.00%	[1],[3],[7]
Minimum [Member] | Electricity congestion revenue rights [Member] | Market Approach [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Illiquid price differences between settlement points	0	[1],[2],[3],[8]	0	[1],[2],[3],[8]
Minimum [Member] | Coal purchases [Member] | Market Approach [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Probability of default (as a percent)	0.00%	[1],[2],[3],[9]	5.00%	[1],[2],[3],[9]
Recovery rate (as a percent)	0.00%	[1],[10],[2],[3]	0.00%	[1],[10],[2],[3]
Illiquid price variances between mines	0	[1],[11],[2],[3]	0	[1],[11],[2],[3]
Minimum [Member] | Interest rate swaps [Member] | Valuation Model [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Fair Value Inputs, Nonperformance Risk Adjustment	30000000.00%	[1],[12],[3]	'
Maximum [Member] | Electricity purchases and sales [Member] | Valuation Model [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Illiquid pricing locations (in usd per MWh)	45	[1],[3],[4]	40	[1],[3],[4]
Hourly price curve shape (in usd per MWh)	70	[1],[3],[5]	50	[1],[3],[5]
Maximum [Member] | Electricity spread options [Member] | Option Pricing Model [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Gas to power correlation (as a percent)	100.00%	[1],[3],[6]	90.00%	[1],[3],[6]
Power volatility (as a percent)	30.00%	[1],[3],[7]	40.00%	[1],[3],[7]
Maximum [Member] | Electricity congestion revenue rights [Member] | Market Approach [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Illiquid price differences between settlement points	30	[1],[2],[3],[8]	0.5	[1],[2],[3],[8]
Maximum [Member] | Coal purchases [Member] | Market Approach [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Probability of default (as a percent)	40.00%	[1],[2],[3],[9]	40.00%	[1],[2],[3],[9]
Recovery rate (as a percent)	40.00%	[1],[10],[2],[3]	40.00%	[1],[10],[2],[3]
Illiquid price variances between mines	$1	[1],[11],[2],[3]	$1	[1],[11],[2],[3]
Maximum [Member] | Interest rate swaps [Member] | Valuation Model [Member]	'		'
Fair Value Inputs, Assets and Liabilities, Quantitative Information [Line Items]	'		'
Fair Value Inputs, Nonperformance Risk Adjustment	35000000.00%	[1],[12],[3]	'
[1]	Electricity purchase and sales contracts include wind generation agreements and hedging positions in the ERCOT west region as well as power contracts, the valuations of which include unobservable inputs related to the hourly shaping of the price curve. Electricity spread option contracts consist of physical electricity call options. Electricity congestion revenue rights contracts consist of forward purchase contracts (swaps and options) used to hedge electricity price differences between settlement points within ERCOT. Coal purchase contracts relate to western (Powder River Basin) coal. Interest rate swaps are held by TCEH to hedge exposure to its variable rate debt.
[2]	While we use the market approach, there is either insufficient market data to consider the valuation liquid or the significance of credit reserves or non-performance risk adjustments results in a Level 3 designation.
[3]	The range of the inputs may be influenced by factors such as time of day, delivery period, season and location.
[4]	Based on the historical range of forward average monthly ERCOT West Hub prices.
[5]	Based on the historical range of forward average hourly ERCOT North Hub prices.
[6]	Estimate of the historical range based on forward natural gas and on-peak power prices for the ERCOT hubs most relevant to our spread options.
[7]	Based on historical forward price changes.
[8]	Based on the historical price differences between settlement points in the ERCOT North Hub and the ERCOT
[9]	Estimate of the range of probabilities of default based on past experience and the length of the contract as well as our and counterparties' credit ratings.
[10]	Estimate of the default recovery rate based on historical corporate rates.
[11]	Based on the historical range of price variances between mine locations.
[12]	Estimate of nonperformance risk adjustment based on TCEH senior secured bond trading values. See discussion immediately below regarding transfers into Level 3.

Fair_Value_Measurements_Schedu2

Fair Value Measurements (Schedule of Changes in Fair Value of the Level 3 Assets and Liabilities (All Related to Commodity Contracts)) (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013	Dec. 31, 2012
	Level 3 [Member]		Level 3 [Member]		Level 3 [Member]		Level 3 [Member]		Texas Competitive Electric Holdings Company LLC [Member]	Texas Competitive Electric Holdings Company LLC [Member]
	Commodity contracts [Member]		Commodity contracts [Member]		Commodity contracts [Member]		Commodity contracts [Member]		Interest rate swaps [Member]	Interest rate swaps [Member]
	Derivative financial instruments, assets and liabilities [Member]		Derivative financial instruments, assets and liabilities [Member]		Derivative financial instruments, assets and liabilities [Member]		Derivative financial instruments, assets and liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'		'		'		'		'	'
Accumulated Unrealized Gain (Loss) On Interest Rate Derivative Instruments Not Designated As Hedging Instruments	'		'		'		'		$1,520	$2,065
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]	'		'		'		'		'	'
Balance at beginning of period	88		12		29		53		'	'
Total unrealized valuation gains (losses)	-24		12		-41		-5		'	'
Purchases, issuances and settlements:	'		'		'		'		'	'
Purchases	6	[1]	17	[1]	66	[1]	30	[1]	'	'
Issuances	0	[1]	-4	[1]	-6	[1]	-15	[1]	'	'
Settlements	-62	[1]	-56	[1]	-45	[1]	-34	[1]	'	'
Transfers into Level 3	-1,179	[2]	3	[2]	-1,178	[2]	-42	[2]	'	'
Transfers out of Level 3	0	[2]	0	[2]	4	[2]	-3	[2]	'	'
Net change	-1,259	[3]	-28	[3]	-1,200	[3]	-69	[3]	'	'
Balance at end of period	-1,171		-16		-1,171		-16		'	'
Unrealized valuation gains (losses) relating to instruments held at end of period	254		15		280		-22		'	'
Accumulated Unrealized Gain (Loss) On Interest Rate Derivative Instruments Not Designated As Hedging Instruments Net Of Nonperformance Risk Adjustments	'		'		'		'		$1,167	'
[1]	Settlements reflect reversals of unrealized mark-to-market valuations previously recognized in net income. Purchases and issuances reflect option premiums paid or received.
[2]
[3]	Substantially all changes in values of commodity contracts are reported in the income statement in net gain (loss) from commodity hedging and trading activities. Changes in values of interest rate swaps are reported in the income statement in interest expense and related charges. Activity excludes changes in fair value in the month the position settled as well as amounts related to positions entered into and settled in the same month.

Commodity_And_Other_Derivative2

Commodity And Other Derivative Contractual Assets And Liabilities (Financial Statement Effects of Derivatives) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, Fair Value, Gross Asset	$1,132	$2,049
Derivative liabilities, Fair Value, Gross Liability	-1,376	-2,450
Derivative, Fair Value, Net	-244	-401
Current assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative Assets And Liability, Fair Value, Gross Assets	973	1,463
Noncurrent assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative Assets And Liability, Fair Value, Gross Assets	159	586
Current liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative Assets And Liability, Fair Value, Gross Liability	-594	-894
Noncurrent liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative Assets And Liability, Fair Value, Gross Liability	-782	-1,556
Commodity contracts [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, Fair Value, Gross Asset	1,131	2,047
Derivative liabilities, Fair Value, Gross Liability	-209	-383
Derivative asset, Fair Value, Net	1,129	2,047
Derivative liabilities, Fair Value, Net	-207	-383
Commodity contracts [Member] | Current assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, Fair Value, Gross Asset	972	1,461
Derivative liabilities, Fair Value, Gross Asset	0	0
Commodity contracts [Member] | Noncurrent assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, Fair Value, Gross Asset	159	586
Derivative liabilities, Fair Value, Gross Asset	0	0
Commodity contracts [Member] | Current liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, Fair Value, Gross Liability	-2	0
Derivative liabilities, Fair Value, Gross Liability	-204	-366
Commodity contracts [Member] | Noncurrent liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, Fair Value, Gross Liability	0	0
Derivative liabilities, Fair Value, Gross Liability	-3	-17
Interest rate swaps [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, Fair Value, Gross Asset	1	2
Derivative liabilities, Fair Value, Gross Liability	-1,167	-2,067
Derivative asset, Fair Value, Net	1	2
Derivative liabilities, Fair Value, Net	-1,167	-2,067
Interest rate swaps [Member] | Current assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, Fair Value, Gross Asset	1	2
Derivative liabilities, Fair Value, Gross Asset	0	0
Interest rate swaps [Member] | Noncurrent assets [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, Fair Value, Gross Asset	0	0
Derivative liabilities, Fair Value, Gross Asset	0	0
Interest rate swaps [Member] | Current liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, Fair Value, Gross Liability	0	0
Derivative liabilities, Fair Value, Gross Liability	-388	-528
Interest rate swaps [Member] | Noncurrent liabilities [Member]	'	'
Derivatives, Fair Value [Line Items]	'	'
Derivative asset, Fair Value, Gross Liability	0	0
Derivative liabilities, Fair Value, Gross Liability	($779)	($1,539)

Commodity_And_Other_Derivative3

Commodity And Other Derivative Contractual Assets And Liabilities (Derivative (Income Statement Presentation) and Derivative type (Income Statement Presentation of Loss Reclassified from Accumulated OCI into Income)) (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Interest rate swaps [Member]

Interest rate swaps [Member]

Net gain (loss) from commodity hedging and trading activities [Member]

Net gain (loss) from commodity hedging and trading activities [Member]

Net gain (loss) from commodity hedging and trading activities [Member]

Net gain (loss) from commodity hedging and trading activities [Member]

Interest expense and related charges [Member]

Interest expense and related charges [Member]

Interest expense and related charges [Member]

Interest expense and related charges [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Commodity contracts [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Depreciation and amortization [Member]

Depreciation and amortization [Member]

Depreciation and amortization [Member]

Depreciation and amortization [Member]

Interest expense and related charges [Member]

Interest expense and related charges [Member]

Interest expense and related charges [Member]

Interest expense and related charges [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Interest rate swaps [Member]

Derivative Instruments, Gain (Loss) [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net gain (loss)

$351

($283)

$487

($391)

'

'

$98

[1]

($95)

[1]

$54

[1]

$130

[1]

($521)

$253

[2]

($188)

[2]

$433

'

'

'

'

'

'

'

'

'

'

'

'

Income statement presentation of loss reclassified from accumulated OCI into income

-2

-2

-6

-7

'

'

'

'

'

'

'

'

'

'

-2

-2

-8

-8

-1

-1

-2

-2

-1

-1

-6

-6

Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax

'

'

'

'

-37

-42

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net

'

'

'

'

($2)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Amount represents changes in fair value of positions in the derivative portfolio during the period, as realized amounts related to positions settled are assumed to equal reversals of previously recorded unrealized amounts.

[2]

Includes unrealized mark-to-market net gain (loss) as well as the net realized effect on interest paid/accrued, both reported in "Interest Expense and Related Charges" (see Note 12).

Commodity_And_Other_Derivative4

Commodity And Other Derivative Contractual Assets And Liabilities (Derivative Assets and Liabilities From Balance Sheet to Net Amounts After Consideration Netting Arrangements with Counterparties and Financial Collateral) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
Derivatives, Fair Value [Line Items]	'		'
Derivative Assets (Liability), Fair Value, Amount Offset Against Collateral, Secured By First Lien Interest in Subsidiary	$1,200,000,000		'
Derivative assets: Amounts Presented in Balance Sheet	1,132,000,000		2,049,000,000
Derivative assets: Offsetting Financial Instruments	-614,000,000	[1]	-1,265,000,000	[1]
Derivative assets: Financial Collateral (Received) Pledged	-351,000,000	[2]	-597,000,000	[2]
Derivative assets: Net Amounts	167,000,000	[3]	187,000,000
Derivative liabilities: Amounts Presented in Balance Sheet	-1,376,000,000		-2,450,000,000
Derivative liabilities: Offsetting Financial Instruments	614,000,000	[1]	1,265,000,000	[1]
Derivative liabilities: Financial Collateral (Received) Pledged	11,000,000	[2]	29,000,000	[2]
Derivative liabilities: Net Amounts	-751,000,000	[3]	-1,156,000,000
Derivative, Fair Value, Net	-244,000,000		-401,000,000
Derivative Asset (Liabilit), Collateral, Obligation to Return Cash	0		0
Derivative (Assets) Liability, Fair Value of Collateral, Net	340,000,000	[2]	568,000,000	[2]
Derivative Assets (Liability), Fair Value, Amount Offset Against Collateral	-584,000,000	[3]	-969,000,000
Commodity contracts [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Derivative assets: Amounts Presented in Balance Sheet	1,131,000,000		2,047,000,000
Derivative assets: Offsetting Financial Instruments	-613,000,000	[1]	-1,263,000,000	[1]
Derivative assets: Financial Collateral (Received) Pledged	-351,000,000	[2]	-597,000,000	[2]
Derivative assets: Net Amounts	167,000,000	[3]	187,000,000
Derivative liabilities: Amounts Presented in Balance Sheet	-209,000,000		-383,000,000
Derivative liabilities: Offsetting Financial Instruments	180,000,000	[1]	319,000,000	[1]
Derivative liabilities: Financial Collateral (Received) Pledged	11,000,000	[2]	29,000,000	[2]
Derivative liabilities: Net Amounts	-18,000,000	[3]	-35,000,000
Interest rate swaps [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Derivative assets: Amounts Presented in Balance Sheet	1,000,000		2,000,000
Derivative assets: Offsetting Financial Instruments	-1,000,000	[1]	-2,000,000	[1]
Derivative assets: Financial Collateral (Received) Pledged	0	[2]	0	[2]
Derivative assets: Net Amounts	0	[3]	0
Derivative liabilities: Amounts Presented in Balance Sheet	-1,167,000,000		-2,067,000,000
Derivative liabilities: Offsetting Financial Instruments	434,000,000	[1]	946,000,000	[1]
Derivative liabilities: Financial Collateral (Received) Pledged	0	[2]	0	[2]
Derivative liabilities: Net Amounts	($733,000,000)	[3]	($1,121,000,000)
[1]	xclude trade accounts receivable and payable related to settled financial instruments.
[2]	Financial collateral consists entirely of cash margin deposits.
[3]	Includes net liability positions totaling approximately $1.2 billion (before nonperformance risk adjustment) related to counterparties with positions that are secured by a first-lien interest in the same assets of TCEH (on a pari passu basis) with the TCEH Senior Secured Facilities and the TCEH Senior Secured Notes.

Commodity_And_Other_Derivative5

Commodity And Other Derivative Contractual Assets And Liabilities (Derivative Volumes) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Millions, unless otherwise specified
Interest rate swaps - Floating/fixed [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Derivative, Notional Amount	$30,740	[1]	$31,060	[1]
Interest rate swaps - Basis [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Derivative, Notional Amount	$11,967		$11,967
Natural gas price hedge forward sales and purchases (in MMBtu) [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Nonmonetary Notional Volume	452,000,000	[2]	875,000,000	[2]
Nonmonetary notional amount of price risk derivatives, net transaction amounts (in MMBtu)	210,000,000		360,000,000
Natural gas Locational basis swaps (in MMBtu) [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Nonmonetary Notional Volume	337,000,000		495,000,000
All other (in MMBtu) [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Nonmonetary Notional Volume	2,021,000,000		1,549,000,000
Electricity (in GWh) [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Nonmonetary Notional Volume	21,663		76,767
Congestion Revenue RIghts (in GWh) [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Nonmonetary Notional Volume	82,156	[3]	111,185	[3]
Coal (in tons) [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Nonmonetary Notional Volume	11,000,000		14,000,000
Fuel oil (in gallons) [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Nonmonetary Notional Volume	28,000,000		47,000,000
Uranium (in pounds) [Member]	'		'
Derivatives, Fair Value [Line Items]	'		'
Nonmonetary Notional Volume	575,000		441,000
[1]	Includes notional amount of interest rate swaps with maturity dates through October 2014 as well as notional amount of swaps effective from October 2014 with maturity dates through October 2017 (see Note 5).
[2]	Represents gross notional forward sales, purchases and options transactions in the natural gas hedging program. The net amount of these transactions was approximately 210 million MMBtu and 360 million MMBtu at September 30, 2013 and December 31, 2012, respectively.
[3]	Represents gross forward purchases associated with instruments used to hedge electricity price differences between settlement points within ERCOT.

Commodity_And_Other_Derivative6

Commodity And Other Derivative Contractual Assets And Liabilities (Credit Risk-Related Contingent Features of Derivatives) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Credit Derivatives [Line Items]	'	'
Derivative, Net Liability Position, Aggregate Fair Value	$1,232	$2,208
Credit risk derivative with contingent feature [Member]	'	'
Credit Derivatives [Line Items]	'	'
Liquidity exposure associated with liabilities reduced by cash and letter of credit postings with the counterparties	9	12
Assets Needed for Immediate Settlement, Aggregate Fair Value	8	'
Derivative, Net Liability Position, Aggregate Fair Value	40	58
Cross-default credit derivative [Member]	'	'
Credit Derivatives [Line Items]	'	'
Assets Needed for Immediate Settlement, Aggregate Fair Value	1,087	1,122
Derivative, Net Liability Position, Aggregate Fair Value	$1,192	$2,150

Commodity_And_Other_Derivative7

Commodity And Other Derivative Contractual Assets And Liabilities (Concentrations of Credit Risk Related to Derivatives) (Details) (Texas Competitive Electric Holdings Company LLC [Member], Credit Risk Contract [Member], USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Texas Competitive Electric Holdings Company LLC [Member] | Credit Risk Contract [Member]	'
Derivative [Line Items]	'
Total credit risk exposure to all counterparties related to derivative contracts	$1,258
Net exposure to those counterparties after taking into effect master netting arrangements, setoff provisions and collateral	275
Credit risk exposure to banking and financial sector percentage	88.00%
Net exposure to banking and financial sector percentage	59.00%
Largest net Exposure to single counterparty	$50

Pension_And_Other_Postretireme1

Pension And Other Postretirement Employee Benefits (OPEB) Plans (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Defined Benefit Plan, Net Periodic Benefit Cost	$3	$10	$9	$31
Pension Plans, Defined Benefit [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Assumptions used calculating net periodic benefit cost, discount rate	'	'	4.30%	'
Assumptions used calculating net periodic benefit cost, expected long-term return on assets	'	'	5.40%	'
OPEB [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Assumptions used calculating net periodic benefit cost, discount rate	'	'	4.10%	'
Assumptions used calculating net periodic benefit cost, expected long-term return on assets	'	'	6.70%	'
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	'	'	2	'
Oncor Plan [Member] | Texas Competitive Electric Holdings Company LLC [Member] | Termination Plan Obligations [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Settlement Costs Allocated To Subsidiary Expected to Settle Next Year	'	'	$50	'

Related_Party_Transactions_Nar

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

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

1 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2012

Mar. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Aug. 31, 2012

Sep. 30, 2012

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Minimum [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Agreement between parties to settle future reimbursements [Member]

Agreement between parties to settle obligations under the note [Member]

Agreement between parties to settle obligations under the note [Member]

Amounts paid relating equipment accounted for as intangible assets [Member]

Decommisioning liablity [Member]

Decommisioning liablity [Member]

Collateral posted [Member]

Collateral posted [Member]

TEXAS

TEXAS

Audit Years 1997 Through 2002 [Member]

Audit Years 1997 Through 2002 [Member]

Audit Years 1997 Through 2002 [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Senior Secured Debt [Member]

Senior Secured Facilities [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Energy Future Holdings Corp. [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

State and Local Jurisdiction [Member]

State and Local Jurisdiction [Member]

State and Local Jurisdiction [Member]

Internal Revenue Service (IRS) [Member]

Internal Revenue Service (IRS) [Member]

Oncor [Member]

Oncor [Member]

Noninterest bearing note payable maturing in 2016 [Member]

Noninterest bearing note payable maturing in 2016 [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Energy Future Holdings Corp. [Member]

Rating-Agencies-Downgrades

Agreement_settled

Oncor [Member]

Oncor [Member]

Related Party Transaction [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related Party Transaction, Interest Income

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$9

$3

$33

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Average daily balance of notes

'

'

'

'

'

'

'

'

'

'

'

'

'

'

683

77

822

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related party transaction, amounts of transaction

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

273

'

281

'

728

746

'

'

'

'

'

'

'

'

'

159

'

'

'

'

'

'

'

'

'

'

'

'

Due to Affiliate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

158

'

'

'

158

'

53

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of agreements related to securitzation (transition) bonds settled

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, gross

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,571

22,635

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repayments of Related Party Debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

20

6

'

'

'

'

'

'

'

'

'

Interest expense, related party

'

'

'

'

'

1

1

3

2

'

'

'

'

'

'

'

'

'

'

'

2

'

16

'

'

'

'

10

0

10

29

0

'

'

'

'

'

'

'

'

'

'

'

'

'

Selling, general and administrative expenses from transactions with related party

'

'

'

'

'

'

'

'

'

'

59

61

176

178

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Delivery fee surcharge remitted to related party

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0

4

5

'

8

12

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Due to Affiliate, Noncurrent

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

352

284

'

'

'

'

'

'

'

Letter of credit posted as collateral

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10

11

'

'

'

'

'

Event of credit rating downgrade, letter of credit required to be posted to secure payment obligations

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

170

'

'

'

170

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Event of credit rating downgrade, minimum number of rating agencies downgrade below investment grade (in credit agencies downgrades)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accrued income taxes payable to parent

'

'

'

'

'

7

'

'

'

31

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

84

Affiliate tax sharing liability

723

'

723

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income Tax Expense (Benefit)

($17)

($228)

($476)

($692)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$134

$83

$14

$78

'

RelatedParty_Transactions_Ener

Related-Party Transactions (Energy Future Competitive Holdings CO Related Party Information) (Details) (USD $)

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Jan. 31, 2013

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2012

Mar. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Intermediate Holding CO LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Texas Competitive Electric Holdings Company LLC [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Affiliated Entity [Member]

Amounts in Escrow Related to August 2012 Debt Issuances [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Oncor [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Holdings Corp. [Member]

Energy Future Intermediate Holding CO LLC [Member]

Energy Future Intermediate Holding CO LLC [Member]

Amounts paid relating equipment accounted for as intangible assets [Member]

Note related to debt principal and interest payments (P&I Note) [Member]

Note related to debt principal and interest payments (P&I Note) [Member]

Note related to general corporate purposes (SG&A Note) [Member]

Note related to general corporate purposes (SG&A Note) [Member]

11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member]

Collateral posted [Member]

Collateral posted [Member]

Senior Notes [Member]

Senior Notes [Member]

Term loan Facilities [Member]

Term loan Facilities [Member]

Senior Notes [Member]

Senior Notes [Member]

Senior Secured Debt [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Debt held by related party [Member]

Related Party Transaction [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Related Party, Letter of Credit Posted as Collateral

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$10

$11

'

'

'

'

'

'

Intercompany Receivables

'

'

'

'

'

'

'

'

'

'

0

698

0

465

0

233

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Intercompany payables

'

'

'

'

92

'

92

'

81

'

'

'

'

'

'

'

'

382

'

'

382

'

382

'

'

'

'

'

'

'

'

284

284

19

19

79

79

Repayments of intercompany payables

'

94

30

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted cash

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

680

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Description of variable rate basis

'LIBOR

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

LIBOR rate (as a percent)

'

'

'

'

'

'

5.00%

'

'

'

5.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Notes receivable from parent

0

0

'

698

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest expense, related party

'

'

'

'

1

1

3

2

'

'

'

'

'

'

'

'

'

10

0

10

29

0

'

'

'

'

2

'

16

'

'

'

'

'

'

'

'

Repayments of Related Party Debt

'

'

'

'

'

'

'

'

'

6

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Delivery fee surcharge remitted to related party

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$0

$4

$5

'

$8

$12

'

'

'

'

'

'

'

'

Supplementary_Financial_Inform2

Supplementary Financial Information Supplementary Financial Information (Other Income and Deductions) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Other Income and Expenses [Abstract]	'	'	'	'
Consent fee related to novation of hedge positions between counterparties	$0	$0	$0	$6
Insurance/litigation settlements	0	0	2	2
All other	1	2	5	4
Total other income	1	2	7	12
Impairment of mineral interests	0	24	0	24
Other Nonoperating Income, Other Asset Impairment Charges	3	0	3	0
Counterparty contract settlement	0	4	0	4
Other	5	2	9	9
Total other deductions	$8	$30	$12	$37

Supplementary_Financial_Inform3

Supplementary Financial Information (Interest Expense and Related Charges) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Supplementary Financial Information [Abstract]	'	'	'	'
Interest paid/accrued (including net amounts settled/accrued under interest rate swaps)	$688	$647	$2,042	$1,938
Interest related to pushed down debt	1	19	5	57
Interest payable with additional toggle notes (Note 5)	0	47	0	136
Unrealized mark-to-market net (gain) loss on interest rate swaps	-413	20	-899	16
Amortization of interest rate swap losses at dedesignation of hedge accounting	2	2	6	7
Amortization of fair value debt discounts resulting from purchase accounting	3	3	8	8
Amortization of debt issuance, amendment and extension costs and discounts	64	45	195	137
Capitalized interest	-5	-11	-19	-31
Total interest expense and related charges	$340	$772	$1,338	$2,268

Supplementary_Financial_Inform4

Supplementary Financial Information (Restricted Cash) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Restricted Cash [Line Items]	'	'
Restricted Cash and Investments, Noncurrent	$947	$947

Supplementary_Financial_Inform5

Supplementary Financial Information (Inventories by Major Category and Other Investments) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Inventories by Major Category	'	'
Materials and supplies	$216	$201
Fuel stock	155	168
Natural gas in storage	29	24
Total inventories	400	393
Other Investments	'	'
Nuclear plant decommissioning trust	737	654
Assets related to employee benefit plans, including employee savings programs, net of distributions	1	8
Land	40	41
Miscellaneous other	9	7
Total investments	$787	$710

Supplementary_Financial_Inform6

Supplementary Financial Information (Nuclear Decommissioning Trust) (Details) (USD $)	3 Months Ended			9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Schedule of Schedule of Decommissioning Fund Investments [Line Items]	'		'	'		'	'
Cost	$513	[1]	'	$513	[1]	'	$491	[1]
Unrealized gain	236		'	236		'	177
Unrealized loss	-12		'	-12		'	-14
Fair market value	737		'	737		'	654
Realized gains	1		0	2		1	'
Realized losses	-3		-1	-3		-2	'
Proceeds from sales of securities	23		25	128		56	'
Investments in securities	-28		-30	-140		-68	'
Debt securities [Member]	'		'	'		'	'
Schedule of Schedule of Decommissioning Fund Investments [Line Items]	'		'	'		'	'
Cost	261	[1],[2]	'	261	[1],[2]	'	246	[1],[2]
Unrealized gain	9	[2]	'	9	[2]	'	16	[2]
Unrealized loss	-4	[2]	'	-4	[2]	'	-1	[2]
Fair market value	266	[2]	'	266	[2]	'	261	[2]
Debt securities, average coupon rate (as a percent)	3.97%		'	3.97%		'	4.38%
Decommissioning Fund Investments, debt maturities, one through five years, fair value	103		'	103		'	'
Decommissioning Fund Investments, debt maturities, five through ten years, fair value	58		'	58		'	'
Decommissioning Fund Investments, debt maturities, after ten years, fair value	105		'	105		'	'
Equity securities [Member]	'		'	'		'	'
Schedule of Schedule of Decommissioning Fund Investments [Line Items]	'		'	'		'	'
Cost	252	[1],[3]	'	252	[1],[3]	'	245	[1],[3]
Unrealized gain	227	[3]	'	227	[3]	'	161	[3]
Unrealized loss	-8	[3]	'	-8	[3]	'	-13	[3]
Fair market value	$471	[3]	'	$471	[3]	'	$393	[3]
[1]	Includes realized gains and losses on securities sold.
[2]	The investment objective for debt securities is to invest in a diversified tax efficient portfolio with an overall portfolio rating of AA or above as graded by S&P or Aa2 by Moody's Investors Services, Inc. The debt securities are heavily weighted with municipal bonds. The debt securities had an average coupon rate of 3.97% and 4.38% at September 30, 2013 and December 31, 2012, respectively, and an average maturity of 6 years at both September 30, 2013 and December 31, 2012.
[3]	The investment objective for equity securities is to invest tax efficiently and to match the performance of the S&P 500 Index.

Supplementary_Financial_Inform7

Supplementary Financial Information (Property, Plant and Equipment) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Supplementary Financial Information [Abstract]	'	'
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$7,700,000,000	$6,800,000,000
Property, plant and equipment b net (Note 12)	$17,961,000,000	$18,556,000,000

Supplementary_Financial_Inform8

Supplementary Financial Information (Asset Retirement and Mining Reclamation Obligations) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Asset Retirement Obligations [Line Items]	'	'
Less amounts due currently	($60)	'
Noncurrent liability at September 30, 2013	444	452
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'
Beginning balance, Liability	536	'
Additions:	'	'
Accretion	41	'
Reductions:	'	'
Payments	-73	'
Ending balance, Liability	504	'
Nuclear Plant Decommissioning [Member]	'	'
Asset Retirement Obligations [Line Items]	'	'
Less amounts due currently	0	'
Noncurrent liability at September 30, 2013	385	'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'
Beginning balance, Liability	368	'
Additions:	'	'
Accretion	17	'
Reductions:	'	'
Payments	0	'
Ending balance, Liability	385	'
Mining Land Reclamation [Member]	'	'
Asset Retirement Obligations [Line Items]	'	'
Less amounts due currently	-60	'
Noncurrent liability at September 30, 2013	26	'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'
Beginning balance, Liability	135	'
Additions:	'	'
Accretion	23	'
Reductions:	'	'
Payments	-72	'
Ending balance, Liability	86	'
Other	'	'
Asset Retirement Obligations [Line Items]	'	'
Less amounts due currently	0	'
Noncurrent liability at September 30, 2013	33	'
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'
Beginning balance, Liability	33	'
Additions:	'	'
Accretion	1	'
Reductions:	'	'
Payments	1	'
Ending balance, Liability	$33	'

Supplementary_Financial_Inform9

Supplementary Financial Information (Other Noncurrent Liabilities and Deferred Credits) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2013
						Audit Years 1997 Through 2002 [Member]	Audit Years 1997 Through 2002 [Member]	Audit Years 1997 Through 2002 [Member]	Audit Years 1997 Through 2002 [Member]	Audit Years 2003 Through 2006 [Member]	Audit Years 2003 Through 2006 [Member]
							Internal Revenue Service (IRS) [Member]	State and Local Jurisdiction [Member]	Reclassification out of Accumulated Deferred Income Tax Liability [Member]	Internal Revenue Service (IRS) [Member]	Internal Revenue Service (IRS) [Member]
									Internal Revenue Service (IRS) [Member]
Other Noncurrent Liabilities Noncurrent and Deferred Credits [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Uncertain tax positions (including accrued interest)	$384	'	$384	'	$1,250	'	'	'	'	'	'
Asset retirement and mining reclamation obligations	444	'	444	'	452	'	'	'	'	'	'
Unfavorable purchase and sales contracts	596	'	596	'	620	'	'	'	'	'	'
Nuclear decommissioning cost over-recovery	352	'	352	'	284	'	'	'	'	'	'
Other, including retirement and other employee benefits	17	'	17	'	37	'	'	'	'	'	'
Total other noncurrent liabilities and deferred credits	1,793	'	1,793	'	2,643	'	'	'	'	'	'
Accumulated deferred income taxes	3,347	'	3,347	'	3,759	'	'	'	411	'	'
Income tax benefit (expense)	-17	-228	-476	-692	'	'	78	14	20	'	'
Reduction of non current income tax expense	'	'	'	'	'	392	'	'	'	'	'
Unrecognized tax benefits, period increase (decrease)	'	'	'	'	'	'	'	'	'	794	'
Income tax examination, reclassification to accumulated deferred income tax liability	'	'	'	'	'	'	'	'	'	685	'
Unrecognized tax benefits, decreases resulting from settlements	'	'	'	'	'	'	'	'	'	109	'
Income tax examination, estimated reversal of Accrued Interest from Examination, Net of Tax	'	'	'	'	'	'	'	'	'	62	'
Deferred tax liabilities, gross	'	'	'	'	'	'	'	'	'	'	430
Amortization of Deferred Charges	'	'	'	'	'	'	'	'	'	'	'
Amortization of Unfavorable Purchase and Sales Contracts	6	'	19	20	'	'	'	'	'	'	'
Future Amortization Expense	'	'	'	'	'	'	'	'	'	'	'
2013	'	'	'	'	25	'	'	'	'	'	'
2014	'	'	'	'	24	'	'	'	'	'	'
2015	'	'	'	'	23	'	'	'	'	'	'
2016	'	'	'	'	23	'	'	'	'	'	'
2017	'	'	'	'	$23	'	'	'	'	'	'

Recovered_Sheet1

Supplementary Financial Information (Supplemental Cash Flow Information) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2012		Sep. 30, 2013
Cash payments (receipts) related to:	'		'
Interest paid	$1,788	[1]	$1,901	[1]
Capitalized interest	-31		-19
Interest paid (net of capitalized interest)	1,757	[1]	1,882	[1]
Income Taxes Paid	83		134
Noncash investing and financing activities:	'		'
Effect of Parent's payment of interest, net of tax, on pushed down debt	30		21
Notes Issued	88		0
Construction expenditures	52	[2]	62	[2]
Contribution related to parent stock based compensation	6		1
Debt Assumed Related to Acquisition of Owner Participant Interest in Trust, Noncash	0		-45
Effect of push down of debt from parent	0		-420
Debt extension transactions	$0		($340)
[1]	Net of amounts received under interest rate swap agreements.
[2]	Represents end-of-period accruals.

Supplemental_Guarantor_Condens2

Supplemental Guarantor Condensed Financial Information (Narrative) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Condensed Financial Statements, Captions [Line Items]	'	'
Debt and Capital Lease Obligations	$103	$526
Push Down Debt [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Debt and Capital Lease Obligations	30	450
Energy Future Holdings Senior Notes [Member] | Push Down Debt [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Debt and Capital Lease Obligations	30	62
Energy Future Holdings Senior Secured Notes to Parent [Member] | Push Down Debt [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Debt and Capital Lease Obligations	'	$388

Supplemental_Guarantor_Condens3

Supplemental Guarantor Condensed Financial Information (Condensed Consolidating Statements of Income (Loss)) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Operating revenues	$1,893	$1,752	$4,572	$4,358
Fuel, purchased power costs and delivery fees	-852	-850	-2,175	-2,153
Net gain from commodity hedging and trading activities	58	-3	29	229
Operating costs	-189	-201	-685	-636
Depreciation and amortization	-331	-328	-1,012	-992
Selling, general and administrative expenses	-175	-174	-502	-484
Franchise and revenue-based taxes	-18	-19	-51	-55
Other income	1	2	7	12
Other deductions	-8	-30	-12	-37
Interest income	1	10	5	36
Interest expense and related charges	-340	-772	-1,338	-2,268
Income (loss) before income taxes	40	-613	-1,162	-1,990
Income tax (expense) benefit	17	228	476	692
Equity earnings of subsidiaries	0	0	0	0
Net income (loss)	57	-385	-686	-1,298
Other comprehensive income	1	1	5	5
Comprehensive income (loss)	58	-384	-681	-1,293
Parent/ Guarantor [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Operating revenues	0	0	0	0
Fuel, purchased power costs and delivery fees	0	0	0	0
Net gain from commodity hedging and trading activities	0	0	0	0
Operating costs	0	0	0	0
Depreciation and amortization	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Franchise and revenue-based taxes	0	0	0	0
Other income	0	0	0	0
Other deductions	0	0	0	0
Interest income	0	0	1	0
Interest expense and related charges	-4	-24	-15	-69
Income (loss) before income taxes	-4	-24	-14	-69
Income tax (expense) benefit	1	8	7	23
Equity earnings of subsidiaries	60	-369	-679	-1,252
Net income (loss)	57	-385	-686	-1,298
Other comprehensive income	1	1	5	5
Comprehensive income (loss)	58	-384	-681	-1,293
Issuer [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Operating revenues	0	0	0	0
Fuel, purchased power costs and delivery fees	0	0	0	0
Net gain from commodity hedging and trading activities	20	-98	-3	173
Operating costs	0	0	0	0
Depreciation and amortization	0	0	0	0
Selling, general and administrative expenses	-14	-4	-49	-4
Franchise and revenue-based taxes	0	0	0	0
Other income	0	0	0	6
Other deductions	0	0	0	0
Interest income	62	91	182	242
Interest expense and related charges	-541	-982	-1,920	-2,794
Income (loss) before income taxes	-473	-993	-1,790	-2,377
Income tax (expense) benefit	165	347	630	829
Equity earnings of subsidiaries	368	277	481	296
Net income (loss)	60	-369	-679	-1,252
Other comprehensive income	1	1	5	5
Comprehensive income (loss)	61	-368	-674	-1,247
Other Guarantors [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Operating revenues	1,893	1,752	4,572	4,358
Fuel, purchased power costs and delivery fees	-852	-850	-2,175	-2,153
Net gain from commodity hedging and trading activities	38	95	32	56
Operating costs	-192	-201	-690	-636
Depreciation and amortization	-332	-328	-1,011	-992
Selling, general and administrative expenses	-173	-172	-481	-486
Franchise and revenue-based taxes	-18	-19	-51	-55
Other income	1	2	7	6
Other deductions	-8	-30	-12	-36
Interest income	206	232	591	593
Interest expense and related charges	-619	-606	-1,842	-1,778
Income (loss) before income taxes	-56	-125	-1,060	-1,123
Income tax (expense) benefit	46	54	420	379
Equity earnings of subsidiaries	1	0	1	0
Net income (loss)	-9	-71	-639	-744
Other comprehensive income	0	0	0	0
Comprehensive income (loss)	-9	-71	-639	-744
Non-guarantors [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Operating revenues	27	3	59	8
Fuel, purchased power costs and delivery fees	0	0	0	0
Net gain from commodity hedging and trading activities	0	0	0	0
Operating costs	0	0	0	0
Depreciation and amortization	1	0	-1	0
Selling, general and administrative expenses	-11	-1	-25	-2
Franchise and revenue-based taxes	0	0	0	0
Other income	0	0	0	0
Other deductions	0	0	0	-1
Interest income	0	0	0	0
Interest expense and related charges	-4	-2	-8	-5
Income (loss) before income taxes	13	0	25	0
Income tax (expense) benefit	-5	0	-9	0
Equity earnings of subsidiaries	0	0	0	0
Net income (loss)	8	0	16	0
Other comprehensive income	0	0	0	0
Comprehensive income (loss)	8	0	16	0
Eliminations [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Operating revenues	-27	-3	-59	-8
Fuel, purchased power costs and delivery fees	0	0	0	0
Net gain from commodity hedging and trading activities	0	0	0	0
Operating costs	3	0	5	0
Depreciation and amortization	0	0	0	0
Selling, general and administrative expenses	23	3	53	8
Franchise and revenue-based taxes	0	0	0	0
Other income	0	0	0	0
Other deductions	0	0	0	0
Interest income	-267	-313	-769	-799
Interest expense and related charges	828	842	2,447	2,378
Income (loss) before income taxes	560	529	1,677	1,579
Income tax (expense) benefit	-190	-181	-572	-539
Equity earnings of subsidiaries	-429	92	197	956
Net income (loss)	-59	440	1,302	1,996
Other comprehensive income	-1	-1	-5	-5
Comprehensive income (loss)	($60)	$439	$1,297	$1,991

Supplemental_Guarantor_Condens4

Supplemental Guarantor Condensed Financial Information (Condensed Consolidating Statements of Cash Flows) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Condensed Financial Statements, Captions [Line Items]	'	'
Cash provided by (used in) operating activities	($121)	$329
Cash flows b financing activities:	'	'
Notes/advances due to affiliates	4	0
Repayments/repurchases of long-term debt	-94	-30
Net short-term borrowings under accounts receivable securitization program	90	80
Contributions from noncontrolling interests	3	6
Sale/leaseback of equipment	0	15
Other, net	-10	0
Cash used in financing activities	-7	-493
Cash flows b investing activities:	'	'
Capital expenditures	-353	-498
Nuclear fuel purchases	-59	-155
Notes due from affiliates	698	922
Purchase of right to use certain computer-related assets from parent	-6	0
Proceeds from sales of assets	3	1
Acquisition of combustion turbine trust interest	-40	'
Purchases of environmental allowances and credits	-13	-19
Proceeds from sales of nuclear decommissioning trust fund securities	128	56
Investments in nuclear decommissioning trust fund securities	-140	-68
Other, net	3	-2
Cash provided by (used in) investing activities	215	353
Net change in cash and cash equivalents	87	189
Cash and cash equivalents b beginning balance	1,175	120
Cash and cash equivalents b ending balance	1,262	309
Proceeds from (Repayments of) Short-term Debt	0	-385
Decrease In Income Tax Related Note Payable To Related Parties	0	-20
Settlement of reimbursement agreements with Oncor (Note 11)	0	-159
Increase Decrease In Other Restricted Cash	0	-112
Parent/ Guarantor [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Cash provided by (used in) operating activities	-8	-7
Cash flows b financing activities:	'	'
Notes/advances due to affiliates	11	11
Repayments/repurchases of long-term debt	-3	-4
Net short-term borrowings under accounts receivable securitization program	0	0
Contributions from noncontrolling interests	0	0
Sale/leaseback of equipment	'	0
Other, net	0	'
Cash used in financing activities	8	7
Cash flows b investing activities:	'	'
Capital expenditures	0	0
Nuclear fuel purchases	0	0
Notes due from affiliates	0	0
Purchase of right to use certain computer-related assets from parent	0	'
Proceeds from sales of assets	0	0
Acquisition of combustion turbine trust interest	0	'
Purchases of environmental allowances and credits	0	0
Proceeds from sales of nuclear decommissioning trust fund securities	0	0
Investments in nuclear decommissioning trust fund securities	0	0
Other, net	0	0
Cash provided by (used in) investing activities	0	0
Net change in cash and cash equivalents	0	0
Cash and cash equivalents b beginning balance	0	0
Cash and cash equivalents b ending balance	0	0
Proceeds from (Repayments of) Short-term Debt	'	0
Decrease In Income Tax Related Note Payable To Related Parties	'	0
Settlement of reimbursement agreements with Oncor (Note 11)	'	0
Increase Decrease In Other Restricted Cash	'	0
Issuer [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Cash provided by (used in) operating activities	-1,764	-471
Cash flows b financing activities:	'	'
Notes/advances due to affiliates	1,913	1,029
Repayments/repurchases of long-term debt	-64	0
Net short-term borrowings under accounts receivable securitization program	0	0
Contributions from noncontrolling interests	0	0
Sale/leaseback of equipment	'	0
Other, net	0	'
Cash used in financing activities	1,849	644
Cash flows b investing activities:	'	'
Capital expenditures	0	0
Nuclear fuel purchases	0	0
Notes due from affiliates	0	0
Purchase of right to use certain computer-related assets from parent	0	'
Proceeds from sales of assets	0	0
Acquisition of combustion turbine trust interest	0	'
Purchases of environmental allowances and credits	0	0
Proceeds from sales of nuclear decommissioning trust fund securities	0	0
Investments in nuclear decommissioning trust fund securities	0	0
Other, net	0	0
Cash provided by (used in) investing activities	0	0
Net change in cash and cash equivalents	85	173
Cash and cash equivalents b beginning balance	1,115	87
Cash and cash equivalents b ending balance	1,200	260
Proceeds from (Repayments of) Short-term Debt	'	-385
Decrease In Income Tax Related Note Payable To Related Parties	'	0
Settlement of reimbursement agreements with Oncor (Note 11)	'	0
Increase Decrease In Other Restricted Cash	'	0
Other Guarantors [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Cash provided by (used in) operating activities	1,736	885
Cash flows b financing activities:	'	'
Notes/advances due to affiliates	0	0
Repayments/repurchases of long-term debt	-27	-26
Net short-term borrowings under accounts receivable securitization program	0	0
Contributions from noncontrolling interests	0	0
Sale/leaseback of equipment	'	15
Other, net	0	'
Cash used in financing activities	-27	-190
Cash flows b investing activities:	'	'
Capital expenditures	-349	-491
Nuclear fuel purchases	-59	-155
Notes due from affiliates	-1,222	-118
Purchase of right to use certain computer-related assets from parent	-6	'
Proceeds from sales of assets	3	1
Acquisition of combustion turbine trust interest	-40	'
Purchases of environmental allowances and credits	-13	-19
Proceeds from sales of nuclear decommissioning trust fund securities	128	56
Investments in nuclear decommissioning trust fund securities	-140	-68
Other, net	3	-2
Cash provided by (used in) investing activities	-1,701	-680
Net change in cash and cash equivalents	8	15
Cash and cash equivalents b beginning balance	15	23
Cash and cash equivalents b ending balance	23	38
Proceeds from (Repayments of) Short-term Debt	'	0
Decrease In Income Tax Related Note Payable To Related Parties	'	-20
Settlement of reimbursement agreements with Oncor (Note 11)	'	-159
Increase Decrease In Other Restricted Cash	'	-112
Non-guarantors [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Cash provided by (used in) operating activities	-85	-78
Cash flows b financing activities:	'	'
Notes/advances due to affiliates	0	0
Repayments/repurchases of long-term debt	0	0
Net short-term borrowings under accounts receivable securitization program	90	80
Contributions from noncontrolling interests	3	6
Sale/leaseback of equipment	'	0
Other, net	-10	'
Cash used in financing activities	83	86
Cash flows b investing activities:	'	'
Capital expenditures	-4	-7
Nuclear fuel purchases	0	0
Notes due from affiliates	0	0
Purchase of right to use certain computer-related assets from parent	0	'
Proceeds from sales of assets	0	0
Acquisition of combustion turbine trust interest	0	'
Purchases of environmental allowances and credits	0	0
Proceeds from sales of nuclear decommissioning trust fund securities	0	0
Investments in nuclear decommissioning trust fund securities	0	0
Other, net	0	0
Cash provided by (used in) investing activities	-4	-7
Net change in cash and cash equivalents	-6	1
Cash and cash equivalents b beginning balance	45	10
Cash and cash equivalents b ending balance	39	11
Proceeds from (Repayments of) Short-term Debt	'	0
Decrease In Income Tax Related Note Payable To Related Parties	'	0
Settlement of reimbursement agreements with Oncor (Note 11)	'	0
Increase Decrease In Other Restricted Cash	'	0
Eliminations [Member]	'	'
Condensed Financial Statements, Captions [Line Items]	'	'
Cash provided by (used in) operating activities	0	0
Cash flows b financing activities:	'	'
Notes/advances due to affiliates	-1,920	-1,040
Repayments/repurchases of long-term debt	0	0
Net short-term borrowings under accounts receivable securitization program	0	0
Contributions from noncontrolling interests	0	0
Sale/leaseback of equipment	'	0
Other, net	0	'
Cash used in financing activities	-1,920	-1,040
Cash flows b investing activities:	'	'
Capital expenditures	0	0
Nuclear fuel purchases	0	0
Notes due from affiliates	1,920	1,040
Purchase of right to use certain computer-related assets from parent	0	'
Proceeds from sales of assets	0	0
Acquisition of combustion turbine trust interest	0	'
Purchases of environmental allowances and credits	0	0
Proceeds from sales of nuclear decommissioning trust fund securities	0	0
Investments in nuclear decommissioning trust fund securities	0	0
Other, net	0	0
Cash provided by (used in) investing activities	1,920	1,040
Net change in cash and cash equivalents	0	0
Cash and cash equivalents b beginning balance	0	0
Cash and cash equivalents b ending balance	0	0
Proceeds from (Repayments of) Short-term Debt	'	0
Decrease In Income Tax Related Note Payable To Related Parties	'	0
Settlement of reimbursement agreements with Oncor (Note 11)	'	0
Increase Decrease In Other Restricted Cash	'	$0

Supplemental_Guarantor_Condens5

Supplemental Guarantor Condensed Financial Information (Condensed Consolidating Balance Sheets) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Current assets:	'	'	'	'
Cash and cash equivalents	$1,262	$1,175	$309	$120
Advances to affiliates	0	0	'	'
Accounts receivable	796	710	'	'
Notes receivable from parent	0	698	'	'
Income taxes receivable	7	0	'	'
Accounts receivable from affiliates	0	0	'	'
Inventories	400	393	'	'
Commodity and other derivative contractual assets	973	1,463	'	'
Accumulated deferred income taxes	0	0	'	'
Margin deposits related to commodity positions	21	71	'	'
Other current assets	34	120	'	'
Total current assets	3,493	4,630	'	'
Restricted cash	947	947	'	'
Investments	787	710	'	'
Property, plant and equipment	17,961	18,556	'	'
Advances to affiliates	0	0	'	'
Goodwill	4,952	4,952	'	'
Identifiable intangible assets b net	1,736	1,781	'	'
Commodity and other derivative contractual assets	159	586	'	'
Accumulated deferred income taxes	0	0	'	'
Other noncurrent assets, principally unamortized amendment/issuance costs	859	811	'	'
Total assets	30,894	32,973	'	'
Current liabilities:	'	'	'	'
Short-term borrowings	2,226	2,136	'	'
Notes/advances from affiliates	0	0	'	'
Long-term debt due currently	32	96	'	'
Trade accounts payable	354	389	'	'
Trade accounts and other payables to affiliates	205	139	'	'
Notes payable to parent/affiliate	92	81	'	'
Commodity and other derivative contractual liabilities	594	894	'	'
Margin deposits related to commodity positions	353	600	'	'
Accumulated deferred income taxes	36	49	'	'
Accrued income taxes payable to parent	0	31	'	'
Accrued taxes other than income	95	17	'	'
Accrued interest	532	407	'	'
Other current liabilities	219	255	'	'
Total current liabilities	4,738	5,094	'	'
Accumulated deferred income taxes	3,347	3,759	'	'
Commodity and other derivative contractual liabilities	782	1,556	'	'
Notes or other liabilities due affiliates	2	5	'	'
Long-term debt held by affiliates	382	382	'	'
Long-term debt, less amounts due currently	29,770	29,928	'	'
Affiliate tax sharing liability	723	0	'	'
Other noncurrent liabilities and deferred credits	1,793	2,643	'	'
Total liabilities	41,537	43,367	'	'
EFCH shareholder's equity	0	-10,506	'	'
EFCH membership interests	-10,748	0	'	'
Noncontrolling interests in subsidiaries	105	112	'	'
Total membership interests/equity	-10,643	-10,394	-8,965	-7,716
Total liabilities and membership interests/equity	30,894	32,973	'	'
Parent/ Guarantor [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	0	0	0	0
Advances to affiliates	0	0	'	'
Accounts receivable	0	0	'	'
Notes receivable from parent	'	0	'	'
Income taxes receivable	7	0	'	'
Accounts receivable from affiliates	0	0	'	'
Inventories	0	0	'	'
Commodity and other derivative contractual assets	0	0	'	'
Accumulated deferred income taxes	3	3	'	'
Margin deposits related to commodity positions	0	0	'	'
Other current assets	0	0	'	'
Total current assets	10	3	'	'
Restricted cash	0	0	'	'
Investments	-10,467	-9,794	'	'
Property, plant and equipment	0	0	'	'
Advances to affiliates	0	0	'	'
Goodwill	0	0	'	'
Identifiable intangible assets b net	0	0	'	'
Commodity and other derivative contractual assets	0	0	'	'
Accumulated deferred income taxes	0	0	'	'
Other noncurrent assets, principally unamortized amendment/issuance costs	0	4	'	'
Total assets	-10,457	-9,787	'	'
Current liabilities:	'	'	'	'
Short-term borrowings	0	0	'	'
Notes/advances from affiliates	1	0	'	'
Long-term debt due currently	11	11	'	'
Trade accounts payable	0	0	'	'
Trade accounts and other payables to affiliates	0	0	'	'
Notes payable to parent/affiliate	92	80	'	'
Commodity and other derivative contractual liabilities	0	0	'	'
Margin deposits related to commodity positions	0	0	'	'
Accumulated deferred income taxes	0	0	'	'
Accrued income taxes payable to parent	0	2	'	'
Accrued taxes other than income	0	0	'	'
Accrued interest	3	18	'	'
Other current liabilities	0	1	'	'
Total current liabilities	107	112	'	'
Accumulated deferred income taxes	84	79	'	'
Commodity and other derivative contractual liabilities	0	0	'	'
Notes or other liabilities due affiliates	0	0	'	'
Long-term debt held by affiliates	0	0	'	'
Long-term debt, less amounts due currently	92	515	'	'
Affiliate tax sharing liability	0	'	'	'
Other noncurrent liabilities and deferred credits	8	13	'	'
Total liabilities	291	719	'	'
EFCH shareholder's equity	'	-10,506	'	'
EFCH membership interests	-10,748	'	'	'
Noncontrolling interests in subsidiaries	0	0	'	'
Total membership interests/equity	-10,748	-10,506	'	'
Total liabilities and membership interests/equity	-10,457	-9,787	'	'
Issuer [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	1,200	1,115	260	87
Advances to affiliates	0	0	'	'
Accounts receivable	1	2	'	'
Notes receivable from parent	'	698	'	'
Income taxes receivable	0	0	'	'
Accounts receivable from affiliates	13	95	'	'
Inventories	0	0	'	'
Commodity and other derivative contractual assets	726	1,127	'	'
Accumulated deferred income taxes	0	0	'	'
Margin deposits related to commodity positions	0	0	'	'
Other current assets	2	0	'	'
Total current assets	1,942	3,037	'	'
Restricted cash	947	947	'	'
Investments	23,885	23,382	'	'
Property, plant and equipment	0	0	'	'
Advances to affiliates	0	0	'	'
Goodwill	4,952	4,952	'	'
Identifiable intangible assets b net	0	0	'	'
Commodity and other derivative contractual assets	147	575	'	'
Accumulated deferred income taxes	490	828	'	'
Other noncurrent assets, principally unamortized amendment/issuance costs	834	781	'	'
Total assets	33,197	34,502	'	'
Current liabilities:	'	'	'	'
Short-term borrowings	2,054	2,054	'	'
Notes/advances from affiliates	10,045	8,830	'	'
Long-term debt due currently	0	64	'	'
Trade accounts payable	5	2	'	'
Trade accounts and other payables to affiliates	0	0	'	'
Notes payable to parent/affiliate	0	0	'	'
Commodity and other derivative contractual liabilities	413	610	'	'
Margin deposits related to commodity positions	335	596	'	'
Accumulated deferred income taxes	3	3	'	'
Accrued income taxes payable to parent	70	433	'	'
Accrued taxes other than income	0	0	'	'
Accrued interest	528	389	'	'
Other current liabilities	0	4	'	'
Total current liabilities	13,453	12,985	'	'
Accumulated deferred income taxes	0	0	'	'
Commodity and other derivative contractual liabilities	779	1,539	'	'
Notes or other liabilities due affiliates	0	0	'	'
Long-term debt held by affiliates	382	382	'	'
Long-term debt, less amounts due currently	29,604	29,355	'	'
Affiliate tax sharing liability	-571	'	'	'
Other noncurrent liabilities and deferred credits	17	36	'	'
Total liabilities	43,664	44,297	'	'
EFCH shareholder's equity	'	-9,795	'	'
EFCH membership interests	-10,467	'	'	'
Noncontrolling interests in subsidiaries	0	0	'	'
Total membership interests/equity	-10,467	-9,795	'	'
Total liabilities and membership interests/equity	33,197	34,502	'	'
Other Guarantors [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	23	15	38	23
Advances to affiliates	74	36	'	'
Accounts receivable	315	360	'	'
Notes receivable from parent	'	0	'	'
Income taxes receivable	84	410	'	'
Accounts receivable from affiliates	0	0	'	'
Inventories	400	393	'	'
Commodity and other derivative contractual assets	247	336	'	'
Accumulated deferred income taxes	0	0	'	'
Margin deposits related to commodity positions	21	71	'	'
Other current assets	32	112	'	'
Total current assets	1,196	1,733	'	'
Restricted cash	0	0	'	'
Investments	867	747	'	'
Property, plant and equipment	17,760	18,422	'	'
Advances to affiliates	9,972	8,794	'	'
Goodwill	0	0	'	'
Identifiable intangible assets b net	1,736	1,781	'	'
Commodity and other derivative contractual assets	12	11	'	'
Accumulated deferred income taxes	0	0	'	'
Other noncurrent assets, principally unamortized amendment/issuance costs	849	806	'	'
Total assets	32,392	32,294	'	'
Current liabilities:	'	'	'	'
Short-term borrowings	2,054	2,054	'	'
Notes/advances from affiliates	0	0	'	'
Long-term debt due currently	10	21	'	'
Trade accounts payable	348	387	'	'
Trade accounts and other payables to affiliates	223	231	'	'
Notes payable to parent/affiliate	0	1	'	'
Commodity and other derivative contractual liabilities	181	284	'	'
Margin deposits related to commodity positions	18	4	'	'
Accumulated deferred income taxes	39	52	'	'
Accrued income taxes payable to parent	0	0	'	'
Accrued taxes other than income	95	17	'	'
Accrued interest	401	281	'	'
Other current liabilities	219	253	'	'
Total current liabilities	3,588	3,585	'	'
Accumulated deferred income taxes	2,782	3,569	'	'
Commodity and other derivative contractual liabilities	3	17	'	'
Notes or other liabilities due affiliates	2	5	'	'
Long-term debt held by affiliates	0	0	'	'
Long-term debt, less amounts due currently	28,704	28,486	'	'
Affiliate tax sharing liability	1,294	'	'	'
Other noncurrent liabilities and deferred credits	1,774	2,594	'	'
Total liabilities	38,147	38,256	'	'
EFCH shareholder's equity	'	-5,962	'	'
EFCH membership interests	-5,755	'	'	'
Noncontrolling interests in subsidiaries	0	0	'	'
Total membership interests/equity	-5,755	-5,962	'	'
Total liabilities and membership interests/equity	32,392	32,294	'	'
Non-guarantors [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	39	45	11	10
Advances to affiliates	0	0	'	'
Accounts receivable	574	445	'	'
Notes receivable from parent	'	0	'	'
Income taxes receivable	0	0	'	'
Accounts receivable from affiliates	5	0	'	'
Inventories	0	0	'	'
Commodity and other derivative contractual assets	0	0	'	'
Accumulated deferred income taxes	3	3	'	'
Margin deposits related to commodity positions	0	0	'	'
Other current assets	0	8	'	'
Total current assets	621	501	'	'
Restricted cash	0	0	'	'
Investments	9	9	'	'
Property, plant and equipment	201	134	'	'
Advances to affiliates	0	0	'	'
Goodwill	0	0	'	'
Identifiable intangible assets b net	5	0	'	'
Commodity and other derivative contractual assets	0	0	'	'
Accumulated deferred income taxes	3	3	'	'
Other noncurrent assets, principally unamortized amendment/issuance costs	7	3	'	'
Total assets	846	650	'	'
Current liabilities:	'	'	'	'
Short-term borrowings	172	82	'	'
Notes/advances from affiliates	0	0	'	'
Long-term debt due currently	11	0	'	'
Trade accounts payable	95	97	'	'
Trade accounts and other payables to affiliates	0	3	'	'
Notes payable to parent/affiliate	0	0	'	'
Commodity and other derivative contractual liabilities	0	0	'	'
Margin deposits related to commodity positions	0	0	'	'
Accumulated deferred income taxes	0	0	'	'
Accrued income taxes payable to parent	14	6	'	'
Accrued taxes other than income	0	0	'	'
Accrued interest	1	0	'	'
Other current liabilities	0	0	'	'
Total current liabilities	293	188	'	'
Accumulated deferred income taxes	0	0	'	'
Commodity and other derivative contractual liabilities	0	0	'	'
Notes or other liabilities due affiliates	0	0	'	'
Long-term debt held by affiliates	0	0	'	'
Long-term debt, less amounts due currently	22	0	'	'
Affiliate tax sharing liability	0	'	'	'
Other noncurrent liabilities and deferred credits	0	0	'	'
Total liabilities	315	188	'	'
EFCH shareholder's equity	'	350	'	'
EFCH membership interests	426	'	'	'
Noncontrolling interests in subsidiaries	105	112	'	'
Total membership interests/equity	531	462	'	'
Total liabilities and membership interests/equity	846	650	'	'
Eliminations [Member]	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	0	0	0	0
Advances to affiliates	-74	-36	'	'
Accounts receivable	-94	-97	'	'
Notes receivable from parent	'	0	'	'
Income taxes receivable	-84	-410	'	'
Accounts receivable from affiliates	-18	-95	'	'
Inventories	0	0	'	'
Commodity and other derivative contractual assets	0	0	'	'
Accumulated deferred income taxes	-6	-6	'	'
Margin deposits related to commodity positions	0	0	'	'
Other current assets	0	0	'	'
Total current assets	-276	-644	'	'
Restricted cash	0	0	'	'
Investments	-13,507	-13,634	'	'
Property, plant and equipment	0	0	'	'
Advances to affiliates	-9,972	-8,794	'	'
Goodwill	0	0	'	'
Identifiable intangible assets b net	-5	0	'	'
Commodity and other derivative contractual assets	0	0	'	'
Accumulated deferred income taxes	-493	-831	'	'
Other noncurrent assets, principally unamortized amendment/issuance costs	-831	-783	'	'
Total assets	-25,084	-24,686	'	'
Current liabilities:	'	'	'	'
Short-term borrowings	-2,054	-2,054	'	'
Notes/advances from affiliates	-10,046	-8,830	'	'
Long-term debt due currently	0	0	'	'
Trade accounts payable	-94	-97	'	'
Trade accounts and other payables to affiliates	-18	-95	'	'
Notes payable to parent/affiliate	0	0	'	'
Commodity and other derivative contractual liabilities	0	0	'	'
Margin deposits related to commodity positions	0	0	'	'
Accumulated deferred income taxes	-6	-6	'	'
Accrued income taxes payable to parent	-84	-410	'	'
Accrued taxes other than income	0	0	'	'
Accrued interest	-401	-281	'	'
Other current liabilities	0	-3	'	'
Total current liabilities	-12,703	-11,776	'	'
Accumulated deferred income taxes	481	111	'	'
Commodity and other derivative contractual liabilities	0	0	'	'
Notes or other liabilities due affiliates	0	0	'	'
Long-term debt held by affiliates	0	0	'	'
Long-term debt, less amounts due currently	-28,652	-28,428	'	'
Affiliate tax sharing liability	0	'	'	'
Other noncurrent liabilities and deferred credits	-6	0	'	'
Total liabilities	-40,880	-40,093	'	'
EFCH shareholder's equity	'	15,407	'	'
EFCH membership interests	15,796	'	'	'
Noncontrolling interests in subsidiaries	0	0	'	'
Total membership interests/equity	15,796	15,407	'	'
Total liabilities and membership interests/equity	($25,084)	($24,686)	'	'