Energy Future Intermediate Holding 10-K 31 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Mar. 31, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	Energy Future Intermediate Holding CO LLC
Entity Central Index Key	1445146
Current Fiscal Year End Date	-19
Entity Filer Category	Non-accelerated Filer
Document Type	10-K
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		0
Entity Outstanding Membership Interests	At March 31, 2015 the outstanding membership interest in Energy Future Intermediate Holding Company LLC was directly held by Energy Future Holdings Corp.
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float	$0

Condensed_Statements_Of_Consol

Condensed Statements Of Consolidated Comprehensive Income (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net income (loss)	($354)	($102)	$315
Other comprehensive income (loss) — net of tax effects:
Reclassification to interest income of mark-to-market valuations of holdings of affiliate debt (net of tax expense of $—, $99 and $—)	0	-185	0
Mark-to-market valuations of holdings of affiliate debt held as available for sale (net of tax expense of $—, $—, and $78)	0	0	145
Net effects related to Oncor (net of tax benefit (expense) of $(25), $(8) and $1)	-47	-14	2
Total other comprehensive income (loss)	-47	-199	147
Comprehensive income (loss)	($401)	($301)	$462

Condensed_Statements_Of_Consol1

Condensed Statements Of Consolidated Income (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Selling, general and administrative expenses	($22)	($20)	$0
Other deductions	-128	-110	0
Interest income — affiliates	0	284	598
Interest expense and related charges	-441	-760	-526
Reorganization Items	-267	0	0
Income (loss) before income taxes and equity in earnings of unconsolidated subsidiary	-858	-606	72
Income tax benefit (expense)	155	169	-27
Equity in earnings of unconsolidated subsidiary (net of tax)	349	335	270
Net income (loss)	($354)	($102)	$315

Condensed_Statements_Of_Consol2

Condensed Statements Of Consolidated Comprehensive Income (Parenthetical) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification to interest income of mark-to-market valuations of holdings of affiliate debt (net of tax expense of $—, $99 and $—)	$0	$99	$0
Mark-to-market valuations of holdings of affiliate debt held as available for sale (net of tax expense of $—, $—, and $78)	0	0	78
Net effects related to Oncor (net of tax benefit (expense) of $(25), $(8) and $1)	($25)	($8)	$1

Condensed_Statements_Of_Consol3

Condensed Statements Of Consolidated Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows — operating activities:
Net income (loss)	($354)	($102)	$315
Adjustments to reconcile net income (loss) to cash used in operating activities:
Equity in earnings of unconsolidated subsidiary	-349	-335	-270
Distributions of earnings from unconsolidated subsidiary	202	213	147
Deferred income taxes, net	-51	-55	-2
Fees associated with completion of EFIH DIP Facility	94	0	0
PIK interest income on EFH Corp. Toggle Notes held as investment	0	0	-288
Interest expense related to pushed-down debt of parent	1	6	75
Interest expense on toggle notes payable in additional principal	65	176	12
Noncash impairment of investment in affiliate debt	0	0	14
Reserve recorded for income tax receivable from EFH Corp.	125	110	0
Loss on exchange and settlement of EFIH First Lien Notes	108	0	0
Accretion of purchase discount on investment in affiliate debt	0	0	-92
Amortization of debt related balances	-17	-52	5
Mark-to-market gain reclassified from accumulated other comprehensive income	0	-284	0
Other, net	3	0	0
Changes in operating assets and liabilities:
Income taxes receivable from/payable to EFH Corp.	0	1	-120
Assets	-2	-5	-2
Accrued Interest	16	2	33
Other liabilities (primarily accrued taxes)	-84	-103	-29
Cash used in operating activities	-243	-428	-202
Cash flows — financing activities:
Proceeds from EFIH DIP Facility before fees paid	3,564	0	0
Fees paid for EFIH Dip Facility	-94	0	0
Repayments/repurchases of debt	-2,312	0	0
Issuances of debt	0	0	2,253
Interest received on holdings of affiliate debt	0	252	0
Distributions to EFH Corp.	0	-680	-950
Debt exchange and issuance costs, premiums and discounts	0	-6	-43
Cash provided by (used in) financing activities	1,158	-434	1,260
Cash flows — investing activities:
Restricted cash related to debt issuance	0	680	-680
Purchase of make-whole agreements between affiliate and unconsolidated subsidiary	0	0	-159
Sale of make-whole agreements between affiliate and unconsolidated subsidiary	0	0	159
Cash provided by (used in) investing activities	0	680	-680
Net change in cash and cash equivalents	915	-182	378
Cash and cash equivalents - beginning balance	242	424	46
Cash and cash equivalents - ending balance	$1,157	$242	$424

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Current assets:
Cash and cash equivalents	$1,157	$242
Other current assets	3	2
Total current assets	1,160	244
Investment in Oncor Holdings	6,050	5,950
Accumulated deferred income taxes	26	0
Other noncurrent assets	0	58
Total assets	7,236	6,252
Current liabilities:
Trade accounts and other payables to affiliates	6	10
Notes, loans and other debt	0	7,877
Accumulated deferred income taxes	26	26
Accrued interest	1	137
Other current liabilities	18	0
Total current liabilities	51	8,050
Debtor-in-Possession Financing, Borrowings Outstanding	5,400	0
Liabilities Subject to Compromise	3,988	0
Accumulated deferred income taxes	0	24
Total liabilities	9,439	8,074
Commitments and Contingencies
Membership interests:
Capital account	-1,482	-1,148
Affiliate debt held by EFIH	-635	-635
Accumulated other comprehensive income (loss)	-86	-39
Total membership interests	-2,203	-1,822
Total liabilities and membership interests	$7,236	$6,252

Statements_of_Consolidated_Mem

Statements of Consolidated Membership Interests (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		($1,148)
Net income (loss)		-354	-102		315
Cash distributions to EFH Corp.		0	680		950
Distribution to EFH Corp. of debt held as investment		0	5,778		-160
Income tax on interest received on holdings of affiliate debt		0	88		0
Adjustments to Additional Paid in Capital, Other			13		-1
Balance at end of period		-1,482	-1,148
Interest received on holdings of affiliate debt		0	-252		0
Balance at beginning of period		-1,822
Recognition in interest income of mark-to-market valuations of investments in affiliate debt upon distribution to EFH Corp.		0	-185		0
Balance at end of period		-2,203	-1,822
Capital Accounts [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	5,049	-1,148	5,049		5,790
Net income (loss)		-354	-102		315
Cash distributions to EFH Corp.		0	-680		-950
Distribution to EFH Corp. of debt held as investment		0	-5,778		-160
Income tax on interest received on holdings of affiliate debt	-88	0	-88		0
Deferred gain on debt exchanges, net of deferred tax asset		0	0		-253
Effect of debt push-down from EFH Corp.		21	438	[1]	308	[1]
Adjustments to Additional Paid in Capital, Other		-1
Balance at end of period		-1,482	-1,148		5,049
Balance at beginning of period	-5,388	-635	-5,388		0
Reclassification of investments in debt securities of affiliates		0	0		-5,388
EFH Corp. debt distributed to EFH Corp. ($5.125 billion principal amount)		0	4,524		0
Net affiliate debt received in debt exchanges ($31 million principal amount)		0	-23		0
Interest received on holdings of affiliate debt			252	[2]
Balance at end of period		-635	-635		-5,388
Balance at beginning of period	-179	-1,822	-179
Balance at end of period		-2,203	-1,822		-179
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	160	-39	160		15
Recognition in interest income of mark-to-market valuations of investments in affiliate debt upon distribution to EFH Corp.		0	-185	[3]	0
Changes in fair values of investments in debt securities of affiliates		0	0		145
Unrecognized gains (losses) related to pension and other retirement benefit plans assumed by Oncor		-49	-16		-2
Net effects related to Oncor		2	2		2
Balance at end of period		($86)	($39)		$160
[1]	Represents the effect of a net reduction of $420 million and $259 million in 2013 and 2012, respectively, of debt pushed down from EFH Corp. (Note 8) and related interest and income tax effects.
[2]	Includes $244 million related to EFH Corp. debt held and $8 million related to TCEH debt held. Income tax effect of $88 million on cash interest received reported as a capital transaction.
[3]	(c)See Note 8 for discussion of debt distributions and cancellations.

Statements_of_Consolidated_Mem1

Statements of Consolidated Membership Interests Statements of Consolidated Membership Interests (Parentheticals) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2013		Dec. 31, 2012
Effect of Reduction of Push Down Debt			$420		$259
Interest received on holdings of affiliate debt			-252		0
Income tax on interest received on holdings of affiliate debt			-88		0
Capital Accounts [Member]
Interest received on holdings of affiliate debt			252	[1]
Income tax on interest received on holdings of affiliate debt	88		88		0
Other comprehensive income (loss), mark-to-market valuations of holdings of long-term debt of affiliates reclassified to Interest income	284	[2]
Capital Accounts [Member] | EFH Corp. [Member]
Interest received on holdings of affiliate debt	244	[1]
Capital Accounts [Member] | TCEH Corp. [Member]
Interest received on holdings of affiliate debt	$8	[1]
[1]	Includes $244 million related to EFH Corp. debt held and $8 million related to TCEH debt held. Income tax effect of $88 million on cash interest received reported as a capital transaction.
[2]	Pre-tax amount is $284 million.

Business_and_Significant_Accou

Business and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Business and Significant Accounting Policies	BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES
	Description of Business
	References in this report to "the company" are to EFIH and/or its direct and indirect subsidiaries as apparent in the context. See Glossary for defined terms.
	EFIH, a direct, wholly owned subsidiary of EFH Corp., is a Dallas, Texas-based holding company with no operations or operating assets whose wholly owned subsidiary, Oncor Holdings, holds a majority interest (approximately 80%) in Oncor. Oncor is a regulated electricity transmission and distribution company principally engaged in providing delivery services to REPs, including subsidiaries of TCEH, that sell electricity to residential, business and other consumers in Texas. EFIH has no reportable business segments. Oncor Holdings and its subsidiaries (the Oncor Ring-Fenced Entities) are not consolidated in EFIH's financial statements in accordance with consolidation accounting standards related to variable interest entities (VIEs) (see Note 3).
	Various ring-fencing measures have been taken to enhance the credit quality of Oncor Holdings and Oncor. These measures serve to mitigate Oncor's and Oncor Holdings' credit exposure to the Texas Holdings Group, which includes EFIH, and to reduce the risk that the assets and liabilities of the Oncor Ring-Fenced Entities would be substantively consolidated with the assets and liabilities of the Texas Holdings Group in the event of a bankruptcy of one or more of Texas Holding Group's subsidiaries. Such measures include, among other things: Oncor's sale of a 19.75% equity interest to Texas Transmission in November 2008; maintenance of separate books and records for the Oncor Ring-Fenced Entities; the board of directors of Oncor Holdings and Oncor being comprised of a majority of independent directors, and prohibitions on the Oncor Ring-Fenced Entities providing credit support to, or receiving credit support from, any member of the Texas Holdings Group. The assets and liabilities of the Oncor Ring-Fenced Entities are separate and distinct from those of the Texas Holdings Group, including TXU Energy and Luminant, and none of the assets of the Oncor Ring-Fenced Entities are available to satisfy the debt or contractual obligations of any member of the Texas Holdings Group. Oncor and Oncor Holdings do not bear any liability for debt or contractual obligations of the Texas Holdings Group (including, but not limited to, EFIH's debt obligations), and vice versa. Accordingly, Oncor Holdings' operations are conducted, and its cash flows managed, independently from the Texas Holdings Group.
	Consistent with the ring-fencing measures discussed above, the assets and liabilities of the Oncor Ring-Fenced Entities have not been, and are not expected to be, substantively consolidated with the assets and liabilities of the Debtors in the Chapter 11 Cases.
	Bankruptcy Filing
	As discussed further in Note 2, on April 29, 2014 (the Petition Date), EFH Corp. and the substantial majority of its direct and indirect subsidiaries, including EFIH, EFCH and TCEH but excluding the Oncor Ring-Fenced Entities, (collectively, the Debtors), filed voluntary petitions for relief (the Bankruptcy Filing) under Chapter 11 of the United States Bankruptcy Code (the Bankruptcy Code) in the United States Bankruptcy Court for the District of Delaware (the Bankruptcy Court). See Note 6 for discussion of the DIP Facilities.
	Basis of Presentation, Including Application of Bankruptcy Accounting
	The consolidated financial statements have been prepared in accordance with US GAAP. The consolidated financial statements have been prepared as if EFIH is a going concern and contemplate the realization of assets and liabilities in the normal course of business. The consolidated financial statements reflect the application of Financial Accounting Standards Board Accounting Standards Codification (ASC) 852, Reorganizations. During the pendency of the Bankruptcy Filing, the Debtors will operate their businesses as debtors-in-possession under the jurisdiction of the Bankruptcy Court and in accordance with the applicable provisions of the Bankruptcy Code. ASC 852 applies to entities that have filed a petition for bankruptcy under Chapter 11 of the Bankruptcy Code. The guidance requires that transactions and events directly associated with the reorganization be distinguished from the ongoing operations of the business. In addition, the guidance provides for changes in the accounting and presentation of liabilities. See Notes 7 and 8 for discussion of these accounting and reporting changes.
	EFIH's investment in Oncor Holdings does not meet accounting standards criteria for consolidation and is accounted for under the equity method (see Note 3). All intercompany items and transactions have been eliminated in consolidation. All dollar amounts in the financial statements and tables in the notes are stated in millions of US dollars unless otherwise indicated.
	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 income and expense, including fair value measurements and estimates of expected allowed claims. 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.
	Income Taxes
	EFH Corp. files a consolidated US federal income tax return that includes the results of EFCH, EFIH, Oncor Holdings and TCEH. Oncor is a partnership for US federal income tax purposes and is not a corporate member of the EFH Corp. consolidated group. Deferred income taxes are provided for temporary differences between the book and tax basis of assets and liabilities as required under accounting rules. See Note 4.
	Investment in Affiliate Debt
	Investments in affiliate debt were classified as a reduction of membership interests effective December 31, 2012 (see Note 11). Prior to December 2012, investments in affiliate debt were classified as available-for-sale securities as assets in the balance sheet and were recorded at fair value with unrealized gains or losses recorded in other comprehensive income. EFIH evaluated its investment in affiliate debt for impairment and recorded an impairment loss if declines in fair value were deemed to be other than temporary, which occurred if it determined it would be unable to recover the carrying value of the investment. Impairments were accounted for as a reduction of interest income if related to the issuer's credit. If they were not related to the issuer's credit, the impairments were recorded in other comprehensive income.
	Impairment of Equity Method Investments
	EFIH evaluates its investment in Oncor Holdings when factors indicate that a decrease in the value of the investment has occurred that is not temporary. Indications of a loss in value include recurring operating losses of the investee or fair value measures that are less than carrying value. An impairment loss is recognized if the carrying value of the investment is greater than the fair value of the investment, and the loss is not deemed temporary. Fair value is determined primarily by discounted cash flows, supported by available market valuations, if applicable.
	Push-Down of EFH Corp. Debt
	In accordance with SEC Staff Accounting Bulletin (SAB) Topic 5-J, EFIH reflects amounts of certain EFH Corp. 10.875% Notes and EFH Corp. Toggle Notes on its balance sheet and the related interest expense in its income statement. The amounts reflected on EFIH's balance sheet were calculated based upon the relative equity investment of EFCH and EFIH in their respective operating subsidiaries at the time of the Merger (see Note 8).
	Changes in Accounting Standards
	In April 2014 the FASB issued ASU No. 2014-08, Presentation of Financial Statements (Topic 205) and Property Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity, which changes the requirements for reporting discontinued operations. The ASU states that a disposal of a component of an entity or a group of components of an entity is required to be reported in discontinued operations if the disposal represents a strategic shift that has or will have a major effect on an entity's operations and financial results when the component of an entity or group of components of an entity meets the criteria to be classified as held for sale, is disposed of by sale, or is disposed of other than by sale. The amendments in this ASU also require additional disclosures about discontinued operations. ASU 2014-08 is effective for the Company for the first quarter 2015. This new requirement is relevant to our presentation of the equity method investment in Oncor, which has been proposed for sale within the Chapter 11 Cases. The new guidance will eliminate a scope exception currently applicable to equity method investments, resulting in the requirement of further analysis of the presentation of the Oncor equity method investment within the consolidated financial statements in 2015. EFIH does not currently expect ASU 2014-08 to materially affect its results of operations, financial position, or cash flows, until a plan of sale of the Oncor investment is approved by the Bankruptcy Court, at which time presentation as a discontinued operations may be appropriate.
	In August 2014, the FASB issued Accounting Standards Update No. 2014-15 (ASU 2014-15), Presentation of Financial Statements – Going Concern. ASU 2014-15 is effective for annual reporting periods (including interim periods within those periods) ending after December 15, 2016. Early application is permitted. The amendments in ASU 2014-15 create a new ASC Sub-topic 205-40, Presentation of Financial Statements – Going Concern and requires management to assess for each annual and interim reporting period if conditions exist that raise substantial doubt about an entity's ability to continue as a going concern. The rule requires various disclosures depending on the facts and circumstances surrounding an entity's ability to continue as a going concern. EFIH is in the process of assessing the effects of the application of the new guidance on its financial statement disclosures.

Chapter_11_Cases

Chapter 11 Cases	12 Months Ended
	Dec. 31, 2014
Reorganizations [Abstract]
Chapter 11 Cases	On the Petition Date, EFH Corp. and the substantial majority of its direct and indirect subsidiaries, including EFIH, EFCH and TCEH but excluding the Oncor Ring-Fenced Entities, filed voluntary petitions for relief under Chapter 11 of the United States Bankruptcy Code in the United States Bankruptcy Court for the District of Delaware. During the pendency of the Bankruptcy Filing (the Chapter 11 Cases), the Debtors will operate their businesses as "debtors-in-possession" under the jurisdiction of the Bankruptcy Court and in accordance with the applicable provisions of the Bankruptcy Code.
	The Bankruptcy Filing resulted primarily from the adverse effects on EFH Corp.'s competitive businesses of lower wholesale electricity prices in ERCOT driven by the sustained decline in natural gas prices since mid-2008. Further, the natural gas hedges that TCEH entered into when forward market prices of natural gas were significantly higher than current prices had largely matured before the remaining positions were terminated shortly after the Bankruptcy Filing. These market conditions challenged the profitability and operating cash flows of EFH Corp.'s competitive businesses and resulted in the inability to support their significant interest payments and debt maturities, including the remaining debt obligations due in 2014, and the inability to refinance and/or extend the maturities of their outstanding debt.
	After a series of discussions with certain creditors that began in 2013 and in anticipation of the Bankruptcy Filing, on April 29, 2014, the Debtors entered into a Restructuring Support and Lock-Up Agreement (RSA) with various stakeholders (Consenting Parties) in order to effect an agreed upon restructuring of the Debtors through a pre-arranged Chapter 11 plan of reorganization.
	Upon receiving competing bids for the sale of EFH Corp.'s indirect economic ownership interest in Oncor, which offered new alternatives to maximize the value of the Debtors' estates, the Debtors terminated the RSA effective July 31, 2014.
	In cooperation with various stakeholders, the Debtors are focused on formulating and implementing an effective and efficient plan of reorganization for each of the Debtors under Chapter 11 of the Bankruptcy Code that maximizes enterprise value. The Debtors currently have the exclusive right to file a Chapter 11 plan of reorganization until June 23, 2015 and the exclusive right to solicit the appropriate votes for any such plan it files prior to such date until August 23, 2015 (i.e., the exclusivity period). Upon expiration of this exclusivity period (unless extended by the Bankruptcy Court), any creditor or stakeholder has the ability to file one or more Chapter 11 plans of reorganization.
	Proposed Sale of EFH Corp.'s Indirect Economic Ownership Interest in Oncor
	In September 2014, with input and support from several key stakeholders, the Debtors filed a motion with the Bankruptcy Court seeking the entry of an order approving bidding procedures with respect to the potential sale of EFH Corp.'s indirect economic ownership interest in Oncor. During October 2014, the bankruptcy court held hearings regarding the motion. In November 2014, the Bankruptcy Court conditionally approved the motion. In January 2015, the Bankruptcy Court approved the Debtors' bidding procedures motion that sets forth the process by which the Debtors are authorized to solicit proposals (i.e., bids) from third parties to acquire (in any form and employing any structure, whether taxable (in whole or in part) or tax-free) EFH Corp.'s indirect economic ownership interest in Oncor in accordance with the Bankruptcy Code. These bidding procedures contemplate that the Debtors select a stalking horse bid after a two-stage closed bidding process, and, after approval by the Bankruptcy Court of such stalking horse bid, the Debtors conduct a round of open bidding culminating in an auction intended to obtain a higher or otherwise best bid for a transaction. Initial bids were received in early March 2015, and each of the Debtors is currently assessing those submissions. EFIH cannot predict the outcome of this process, including whether any acceptable bid will be received, whether the Bankruptcy Court will approve any such bid or whether any such transaction will (or when it will) ultimately close because any such transaction would be the subject of customary closing conditions, including receipt of all applicable regulatory approvals.
	Tax Matters
	In June 2014, EFH Corp. filed a request with the IRS for a private letter ruling (Private Letter Ruling) that, among other things, will provide (a) that (i) the transfer by TCEH of all of its assets and its ordinary course operating liabilities to reorganized TCEH completed through a tax-free spin (in accordance with the Private Letter Ruling) in connection with TCEH's emergence from bankruptcy (Reorganized TCEH), (ii) the transfer by the Debtors to Reorganized TCEH of certain assets and liabilities that are reasonably necessary to the operation of Reorganized TCEH and (iii) the distribution by TCEH of (A) the equity it holds in Reorganized TCEH and (B) the cash proceeds TCEH receives from Reorganized TCEH to the holders of TCEH first lien claims, will qualify as a reorganization within the meaning of Sections 368(a)(1)(G), 355 and 356 of the Code and (b) for certain other rulings under Sections 368(a)(1)(G) and 355 of the Code. The Debtors intend to continue to pursue the Private Letter Ruling to support potential Chapter 11 plans of reorganization that could ultimately be proposed. In October 2014, the Debtors filed a memorandum with the Bankruptcy Court that described tax related matters regarding restructuring alternatives.
	Operation and Implications of the Chapter 11 Cases
	EFIH's ability to continue as a going concern is contingent upon, among other factors, its ability to comply with the financial and other covenants contained in the EFIH DIP Facilities described in Note 6, its ability to obtain new debtor in possession financing in the event the EFIH DIP Facilities were to expire during the pendency of the Chapter 11 Cases and its ability to complete a Chapter 11 plan of reorganization in a timely manner, including obtaining creditor and Bankruptcy Court approval of such plan as well as applicable regulatory approvals required for such plan and obtaining any exit financing needed to implement such plan.
	A Chapter 11 plan of reorganization determines the rights and satisfaction of claims of various creditors and security holders and is subject to the ultimate outcome of negotiations and Bankruptcy Court decisions ongoing through the date on which the Chapter 11 plan is confirmed. EFIH currently expect that any proposed Chapter 11 plan of reorganization will provide, among other things, mechanisms for settlement of claims against the Debtors' estates, treatment of EFH Corp.'s existing equity holders and the Debtors' respective existing debt holders, potential income tax liabilities and certain corporate governance and administrative matters pertaining to a reorganized EFH Corp. Any proposed Chapter 11 plan of reorganization will be subject to revision prior to submission to the Bankruptcy Court based upon discussions with the Debtors' creditors and other interested parties, and thereafter in response to creditor claims and objections and the requirements of the Bankruptcy Code or the Bankruptcy Court. There can be no assurance that the Debtors will be able to secure approval from the Bankruptcy Court for any Chapter 11 plan of reorganization it ultimately proposes or that any Chapter 11 plan will be accepted by the Debtors' creditors.
	In order for the Debtors (including the EFIH Debtors) to emerge successfully from the Chapter 11 Cases as reorganized companies, they must obtain approval from the Bankruptcy Court and certain of their respective creditors for a Chapter 11 plan, which will enable each of the Debtors to transition from the Chapter 11 Cases into reorganized companies conducting ordinary course operations outside of bankruptcy. In connection with an exit from bankruptcy, TCEH and EFIH will require a new credit facility, or exit financing. EFIH's ability to obtain such financing and the approval of such financing will depend on, among other things, the timing and outcome of various ongoing matters in the Chapter 11 Cases.
	Pre-Petition Claims
	Holders of the substantial majority of pre-petition claims were required to file proofs of claims by the bar date established by the Bankruptcy Court. A bar date is the date by which certain claims against the Debtors must be filed if the claimants wish to receive any distribution in the Chapter 11 Cases. The Bankruptcy Court established a bar date of October 27, 2014 for the substantial majority of claims. The Debtors have received approximately 10,000 filed claims since the Petition Date. The Debtors are in the process of reconciling those claims to the amounts listed in its schedules of assets and liabilities, which includes communications with claimants to acquire additional information required for reconciliation. As of March 31, 2015, approximately 2,450 of those claims have been settled, withdrawn or expunged. To the extent claims are reconciled and resolved, EFIH has recorded them at the expected allowed amount. Claims that remain unresolved or unreconciled through the filing of this report have been estimated based upon management's best estimate of the likely claim amounts that the Bankruptcy Court will ultimately allow.
	Beginning in November 2014, EFH Corp. began the process to request the Bankruptcy Court to disallow claims that it believes are duplicative, have been later amended or superseded, are without merit, are overstated or should be disallowed for other reasons. Given the substantial number of claims filed, the claims resolution process will take considerable time to complete. Differences between liability amounts recorded by the company as liabilities subject to compromise and claims filed by creditors will be investigated and, if necessary, the Bankruptcy Court will make a final determination of the allowable claim. Differences between those final allowed claims and the liabilities recorded in the consolidated balance sheets will be recognized as reorganization items in EFIH's statements of consolidated income (loss) as they are resolved. The determination of how liabilities will ultimately be resolved cannot be made until the Bankruptcy Court approves a plan of reorganization or approves orders related to settlement of specific liabilities. Accordingly, the ultimate amount or resolution of such liabilities is not determinable at this time. The resolution of such claims could result in material adjustments to the company's financial statements.

Investment_In_Oncor_Holdings

Investment In Oncor Holdings	12 Months Ended
	Dec. 31, 2014
Investment In Oncor Holdings [Abstract]
Investment In Oncor Holdings	INVESTMENT IN ONCOR HOLDINGS
	EFIH has a wholly-owned subsidiary, Oncor Holdings, which holds an approximate 80% equity interest in Oncor. Oncor Holdings is considered a variable interest entity (VIE). A VIE is an entity with which an entity has a relationship or arrangement that indicates some level of control over the entity or results in economic risks to it. Accounting standards require consolidation of a VIE if an entity has (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 (i.e., the entity is the primary beneficiary of the VIE). In determining the appropriateness of consolidation of a VIE, EFIH evaluates its purpose, governance structure, decision making processes and risks that are passed on to its interest holders. EFIH also examines 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.
	As discussed below, EFIH's consolidated balance sheets include assets and liabilities of VIEs that meet the consolidation standards. The maximum exposure to loss from EFIH's interests in VIEs does not exceed its carrying value.
	EFIH does not consolidate Oncor Holdings and instead accounts for it as an equity method investment because the structural and operational ring-fencing measures discussed in Note 1 prevent it from having power to direct the significant activities of Oncor Holdings or Oncor. In accordance with accounting standards, EFIH accounts for its investment in Oncor Holdings under the equity method, as opposed to the cost method, based on its level of influence over its activities.
	In reaching the conclusion to deconsolidate, EFIH conducted an extensive analysis of Oncor Holdings' underlying governing documents and management structure. Oncor Holdings' unique governance structure was adopted in conjunction with the Merger, when the Sponsor Group, EFH Corp. and Oncor agreed to implement structural and operational measures to ring-fence (the Ring-Fencing Measures) Oncor Holdings and Oncor as discussed in Note 1. The Ring-Fencing Measures were designed to prevent, among other things, (i) increased borrowing costs at Oncor due to the attribution to Oncor of debt from any of EFH Corp.'s other subsidiaries, (ii) the activities of EFH Corp.'s competitive operations following the Merger resulting in the deterioration of Oncor's business, financial condition and/or investment in infrastructure, and (iii) Oncor becoming substantively consolidated into a bankruptcy proceeding involving any member of the Texas Holdings Group. The Ring-Fencing Measures effectively separate the daily operational and management control of Oncor Holdings and Oncor from EFH Corp. and its other subsidiaries. By implementing the Ring-Fencing Measures, Oncor maintained its investment grade credit rating following the Merger, and EFH Corp. reaffirmed Oncor's independence from its competitive businesses to the PUCT.
	EFIH determined the most significant activities affecting the economic performance of Oncor Holdings (and Oncor) are the operation, maintenance and growth of Oncor's electric transmission and distribution assets and the preservation of its investment grade credit profile. The boards of directors of Oncor Holdings and Oncor have ultimate responsibility for the management of the day-to-day operations of their respective businesses, including the approval of Oncor's capital expenditure and operating budgets and the timing and prosecution of Oncor's rate cases. While both boards include members appointed by EFH Corp., a majority of the board members are independent in accordance with rules established by the New York Stock Exchange, and therefore, EFIH concluded for purposes of applying the amended accounting standards that EFH Corp. does not have the power to control the activities deemed most significant to Oncor Holdings' (and Oncor's) economic performance.
	In assessing EFIH's ability to exercise control over Oncor Holdings and Oncor, EFIH considered whether it could take actions to circumvent the purpose and intent of the Ring-Fencing Measures (including changing the composition of Oncor Holdings' or Oncor's board) in order to gain control over the day-to-day operations of either Oncor Holdings or Oncor. EFIH also considered whether (i) it has the unilateral power to dissolve, liquidate or force into bankruptcy either Oncor Holdings or Oncor, (ii) it could unilaterally amend the Ring-Fencing Measures contained in the underlying governing documents of Oncor Holdings or Oncor, and (iii) it could control Oncor's ability to pay distributions and thereby enhance its own cash flow. EFIH concluded that, in each case, no such opportunity exists.
	The carrying value of EFIH's variable interest in Oncor Holdings totaled $6.050 billion and $5.950 billion at December 31, 2014 and 2013, respectively, and is reported as investment in Oncor Holdings in EFIH's consolidated balance sheets. EFIH's maximum exposure to loss from this investment does not exceed its carrying value.
	See Note 12 for discussion of Oncor Holdings' and Oncor's transactions with EFH Corp. and its other subsidiaries.
	Distributions from Oncor Holdings — Oncor Holdings' distributions of earnings to EFIH totaled $202 million, $213 million and $147 million for the years ended December 31, 2014, 2013 and 2012, respectively. Distributions may not be paid except to the extent Oncor maintains a required regulatory capital structure as discussed below. At December 31, 2014, $184 million was eligible to be distributed to Oncor's members after taking into account the regulatory capital structure limit, of which approximately 80% or $146 million relates to EFIH's ownership interest in Oncor. The boards of directors of each of Oncor and Oncor Holdings can withhold distributions to the extent the applicable board determines in good faith that it is necessary to retain such amounts to meet expected future requirements of Oncor and/or Oncor Holdings.
	For the period beginning October 11, 2007 and ending December 31, 2012, distributions (other than distributions of the proceeds of any equity issuance) paid by Oncor to its members were limited by a PUCT order to an amount not to exceed Oncor's cumulative net income determined in accordance with US GAAP, as adjusted. Adjustments consisted of the removal of noncash impacts of purchase accounting and deducting two specific cash commitments. The noncash impacts consisted of removing the effect of an $860 million goodwill impairment charge in 2008 and the cumulative amount of net accretion of fair value adjustments. The two specific cash commitments were a $72 million ($46 million after tax) one-time refund to customers in September 2008 and funds spent as part of a five-year, $100 million commitment for additional energy efficiency initiatives that was completed in 2012.
	Oncor's distributions are limited by its regulatory capital structure, which is required to be at or below the assumed debt-to-equity ratio established periodically by the PUCT for ratemaking purposes, which is currently set at 60% debt to 40% equity. At December 31, 2014, Oncor's regulatory capitalization ratio was 58.8% debt and 41.2% equity. For purposes of this ratio, debt is calculated as long-term debt plus unamortized gains on reacquired debt less unamortized issuance expenses, premiums and losses on reacquired debt. The debt calculation excludes bonds issued by Oncor Electric Delivery Transition Bond Company LLC, which were issued in 2003 and 2004 to recover specific generation-related regulatory assets and other qualified costs. Equity is calculated as membership interests determined in accordance with US GAAP, excluding the effects of accounting for the Merger (which included recording the initial goodwill and fair value adjustments and the subsequent related impairments and amortization).
	As a result of the Bankruptcy Filing, Oncor had credit risk exposure to trade accounts receivable from subsidiaries of TCEH, which related to delivery services provided by Oncor to TCEH's retail electricity operations. At the Petition Date, these accounts receivable totaled $109 million. In June 2014, the Bankruptcy Court authorized the Debtors to pay all pre-petition delivery charges due Oncor, and such amounts were paid in full.
	EFH Corp., Oncor Holdings, Oncor and Oncor's minority investor are parties to a Federal and State Income Tax Allocation Agreement. Additional income tax amounts receivable or payable may arise in the normal course under that agreement.
	Oncor Holdings Financial Statements — Condensed statements of consolidated income of Oncor Holdings and its subsidiaries for the years ended December 31, 2014, 2013 and 2012 are presented below:
		Year Ended December 31,
		2014			2013			2012
	Operating revenues	$	3,822		$	3,552		$	3,328
	Operation and maintenance expenses	(1,453		)	(1,269		)	(1,171		)
	Depreciation and amortization	(851		)	(814		)	(771		)
	Taxes other than income taxes	(438		)	(424		)	(415		)
	Other income	13			18			26
	Other deductions	(15		)	(15		)	(64		)
	Interest income	3			4			24
	Interest expense and related charges	(353		)	(371		)	(374		)
	Income before income taxes	728			681			583
	Income tax expense	(289		)	(259		)	(243		)
	Net income	439			422			340
	Net income attributable to noncontrolling interests	(90		)	(87		)	(70		)
	Net income attributable to Oncor Holdings	$	349		$	335		$	270
	Assets and liabilities of Oncor Holdings at December 31, 2014 and 2013 are presented below:
		December 31,
		2014			2013
	ASSETS
	Current assets:
	Cash and cash equivalents	$	5		$	28
	Restricted cash	56			52
	Trade accounts receivable — net	407			385
	Trade accounts and other receivables from affiliates	118			135
	Income taxes receivable from EFH Corp.	144			16
	Inventories	73			65
	Accumulated deferred income taxes	10			32
	Prepayments and other current assets	91			82
	Total current assets	904			795
	Restricted cash	16			16
	Other investments	97			91
	Property, plant and equipment — net	12,463			11,902
	Goodwill	4,064			4,064
	Regulatory assets — net	1,429			1,324
	Other noncurrent assets	67			71
	Total assets	$	19,040		$	18,263
	LIABILITIES
	Current liabilities:
	Short-term borrowings	$	711		$	745
	Long-term debt due currently	639			131
	Trade accounts payable — nonaffiliates	202			178
	Income taxes payable to EFH Corp.	24			23
	Accrued taxes other than income	174			169
	Accrued interest	93			95
	Other current liabilities	156			135
	Total current liabilities	1,999			1,476
	Accumulated deferred income taxes	1,978			1,905
	Long-term debt, less amounts due currently	4,997			5,381
	Other noncurrent liabilities and deferred credits	2,245			1,822
Total liabilities	$	11,219		$	10,584

Income_Taxes_Notes

Income Taxes (Notes)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	INCOME TAXES
	EFH Corp. files a US federal income tax return that includes the results of EFCH, EFIH, Oncor Holdings and TCEH. Oncor is a partnership for US federal income tax purposes and is not a corporate member of the EFH Corp. consolidated group.
	EFH Corp. and its subsidiaries (including EFCH, EFIH, and TCEH, but not including Oncor Holdings and Oncor) are parties to a Federal and State Income Tax Allocation Agreement, which provides for the computation of income tax liabilities and benefits, and among other things, that each of EFCH, EFIH, TCEH and any other subsidiaries under the agreement is required to make payments to EFH Corp. in an amount calculated to approximate the amount of tax liability such entity would have owed if it filed a separate corporate tax return. Accordingly, EFIH's income tax expense and related balance sheet amounts are recorded as if EFIH files its own corporate income tax returns. Deferred income taxes are provided for temporary differences between the book and tax basis of assets and liabilities as required under accounting rules. Income tax assets and liabilities related to pushed down debt are settled as membership interests transactions.
	Deferred income taxes arise from temporary differences between the tax basis of assets and liabilities and their reported amounts in the financial statements, which will result in taxable or deductible amounts in the future. In evaluating EFIH's ability to recover its deferred tax assets related to its net operating losses, EFIH considers all available positive and negative information, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax-planning strategies, and results of operations. Due to the significant uncertainty of the ultimate recovery by EFIH of the benefit of its NOLs, a valuation allowance of $72 million has been recorded on EFIH’s net deferred tax assets as of December 31, 2014.
	EFH Corp., Oncor Holdings, Oncor and Oncor's third-party minority investor are parties to a separate Federal and State Income Tax Allocation Agreement, which governs the computation of federal income tax liability among such parties, and similarly provides, among other things, that each of Oncor Holdings and Oncor will pay EFH Corp. its share of an amount calculated to approximate the amount of tax liability such entity would have owed if it filed a separate corporate tax return.
	The components of EFIH's income tax expense (benefit) are as follows:
		Year Ended December 31,
		2014			2013			2012
	Current:
	US Federal	$	(104	)	$	(115	)	$	25
	State	—			1			4
	Deferred:
	US Federal	(52		)	(55		)	(2		)
	State	1			—			—
	Total income tax expense (benefit)	$	(155	)	$	(169	)	$	27
	Reconciliation of income taxes computed at the US federal statutory rate to income tax expense (benefit) recorded:
		Year Ended December 31,
		2014			2013			2012
	Income (loss) before income taxes and equity in earnings of unconsolidated subsidiaries	$	(858	)	$	(606	)	$	72
	Income taxes at the US federal statutory rate of 35%	(300		)	(212		)	25
	Nondeductible reserve for tax receivable from EFH Corp.	43			38			—
	Nondeductible debt restructuring costs	28			—			—
	Valuation allowance	72			—			—
	Other	2			5			2
	Income tax expense (benefit)	$	(155	)	$	(169	)	$	27
	Effective rate	18.1		%	27.9		%	37.5		%
	Deferred Income Tax Balances
	Deferred income taxes provided for temporary differences based on tax laws in effect at December 31, 2014 and 2013 are as follows:
		December 31,
		2014									2013
		Total			Current			Noncurrent			Total		Current		Noncurrent
	Deferred Income Tax Assets:
	Accrued interest	$	—		$	—		$	—		$	3	$	—	$	3
	Net operating loss (NOL) carryforwards	232			—			232			—		—		—
	Debt extinguishment gains (Note 8)	30			—			30			49		—		49
	Other	2			—			2			1		—		1
	Total	264			—			264			53		—		53
	Deferred Income Tax Liabilities:
	Debt extinguishment gains related to pushed down debt of EFH Corp. (Note 8)	80			26			54			103		26		77
	Accrued interest	106			—			106			—		—		—
	Debt fair value discount	6			—			6			—		—		—
	Total	192			26			166			103		26		77
	Valuation Allowance	72			—			72			—		—		—
	Net Accumulated Deferred Income Tax (Asset) Liability	$	—		$	26		$	(26	)	$	50	$	26	$	24
	For the year ended December 31, 2014, EFIH generated net operating loss (NOL) carryforwards for federal income tax purposes of $663 million. EFIH believes that it is more likely than not that the benefit from the NOLs will not be realized. In recognition of this risk, EFIH has recorded a valuation allowance of $72 million on the net deferred tax assets. If EFIH's assumptions change and it determines it will be able to realize these NOLs, the tax benefits relating to any reversal of the valuation allowance on deferred tax assets would be recorded to income tax benefit. For the year ended December 31, 2013, EFIH generated NOLs for federal income tax purposes of $328 million.
	Under the Federal and State Income Tax Allocation Agreement, EFIH had recorded a current income tax receivables from EFH Corp., which totaled $125 million and $110 million at December 31, 2014 and 2013, respectively, because EFH Corp. utilized the loss to offset current taxable income from Oncor. See Note 5 for discussion of the reserve recorded against the income tax receivable.

Other_Deductions_Reserve_for_I

Other Deductions Reserve for Income Tax Receivable	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Reserve for Income Tax Receivable	EFIH has income tax receivables from EFH Corp. that arose under the Federal and State Income Tax Allocation Agreement. In consideration of the Bankruptcy Filing, EFIH fully reserved the income tax receivables because of the significant uncertainty regarding their ultimate settlement, resulting in charges of $125 million and $110 million at December 31, 2014 and 2013, respectively.
	EFIH also fully reserved a pre-petition intercompany accounts receivable because of significant uncertainty regarding its ultimate settlement, resulting in a charge of $3 million at December 31, 2014.

DebtorinPossession_Facility_No

Debtor-in-Possession Facility (Notes)	12 Months Ended
	Dec. 31, 2014
Debtor-in-Possession Borrowing Facility [Abstract]
Debtor-In-Possession Borrowing Facilities and Long-Term Debt Not Subject to Compromise [Text Block]	DEBTOR-IN-POSSESSION BORROWING FACILITIES
	EFIH DIP Facility and EFIH First Lien Notes Settlement — The Bankruptcy Court approved the EFIH DIP Facility in June 2014. The EFIH DIP Facility provides for a $5.4 billion first-lien debtor-in-possession financing facility, all of which was utilized as of December 31, 2014 as follows:
	•	$1.836 billion of loans issued under the facility were issued as an exchange to holders of $1.673 billion principal amount of EFIH First Lien Notes plus accrued and unpaid interest totaling $78 million. Holders of substantially all of the principal amount exchanged received as payment in full a principal amount of loans under the DIP facility equal to 105% of the principal amount of the notes held plus 101% of the accrued and unpaid interest at the non-default rate on such principal;
	•	$2.438 billion of cash borrowings were used to repay all remaining $2.312 billion principal amount of EFIH First Lien Notes (plus accrued and unpaid interest totaling $128 million), and
	•	Remaining borrowings under the facility, net of fees, of $1.038 billion are held as cash and cash equivalents.
	The exchange and settlement of the EFIH First Lien Notes resulted in a loss of $108 million, reported in reorganization items, which represents the excess of the principal amounts of debt issued, cash repayments and deferred financing costs associated with the exchanged and settled debt over the carrying value of the exchanged and settled debt and related accrued interest.
	The principal amounts outstanding under the EFIH DIP Facility bear interest based on applicable LIBOR rates, subject to a 1% floor, plus 3.25%. At December 31, 2014, outstanding borrowings under the EFIH DIP Facility totaled $5.4 billion at an annual interest rate of 4.25%. The EFIH DIP Facility is a non-amortizing loan that may, subject to certain limitations, be voluntarily prepaid by the EFIH Debtors, in whole or in part, without any premium or penalty.
	The EFIH DIP Facility will mature on the earlier of (a) the effective date of any reorganization plan, (b) upon the event of the sale of substantially all of EFIH's assets or (c) June 2016. The maturity date may be extended to no later than December 2016 subject to the satisfaction of certain conditions, including the payment of a 25 basis point extension fee, a requirement that an acceptable plan of reorganization has been filed on or prior to such extension and the availability of certain metrics of liquidity applicable to EFIH and EFIH Finance.
	EFIH's obligations under the EFIH DIP Facility are secured by a first lien covering substantially all of EFIH's assets, rights and properties, subject to certain exceptions set forth in the EFIH DIP Facility. The EFIH DIP Facility provides that all obligations thereunder constitute administrative expenses in the Chapter 11 Cases, with administrative priority and senior secured status under the Bankruptcy Code and, subject to certain exceptions set forth in the EFIH DIP Facility, will have priority over any and all administrative expense claims, unsecured claims and costs and expenses in the Chapter 11 Cases.
	The EFIH DIP Facility provides for affirmative and negative covenants applicable to EFIH and EFIH Finance, including affirmative covenants requiring EFIH and EFIH Finance to provide financial information, budgets and other information to the agents under the EFIH DIP Facility, and negative covenants restricting EFIH's and EFIH Finance's ability to incur additional indebtedness, grant liens, dispose of assets, pay dividends or take certain other actions, in each case except as permitted in the EFIH DIP Facility. The EFIH DIP Facility also includes a minimum liquidity covenant pursuant to which EFIH cannot allow the amount of its unrestricted cash (as defined in the EFIH DIP Facility) to be less than $150 million. The Oncor Ring-Fenced Entities are not restricted subsidiaries for purposes of the EFIH DIP Facility.
	The EFIH DIP Facility provides for certain customary events of default, including events of default resulting from non-payment of principal, interest or other amounts when due, material breaches of representations and warranties, material breaches of covenants in the EFIH DIP Facility or ancillary loan documents, cross-defaults under other agreements or instruments and the entry of material judgments against EFIH. Upon the existence of an event of default, the EFIH DIP Facility provides that all principal, interest and other amounts due thereunder will become immediately due and payable, either automatically or at the election of specified lenders.
	The EFIH DIP Facility permits, subject to certain terms, conditions and limitations set forth in the EFIH DIP Facility, EFIH to incur incremental junior lien subordinated debt in an aggregate amount not to exceed $3 billion.

Interest_Expense_and_Related_C

Interest Expense and Related Charges	12 Months Ended
	Dec. 31, 2014
Interest Expense and Related Charges [Abstract]
Interest Expense Disclosure [Text Block]	INTEREST EXPENSE AND RELATED CHARGES
		Year Ended December 31,
		2014			2013			2012
	Interest expense on debtor-in-possession financing	$	125		$	—		$	—
	Interest expense on pre-petition debt	267			630			434
	Interest expense related to pushed down debt	1			6			75
	Interest expense on pre-petition toggle notes payable in additional principal (Note 8)	65			176			12
	Amortization of debt exchange premiums	(24		)	(80		)	(8		)
	Amortization of debt exchange discounts and issuance costs	7			28			13
	Total interest expense and related charges	$	441		$	760		$	526
	Interest expense for the year ended December 31, 2014 reflects interest paid and accrued on debtor-in-possession financing and interest expense on pre-petition debt up to the Petition Date (See Note 6).
	The Bankruptcy Code generally restricts payment of interest on pre-petition debt, subject to certain exceptions. However, the Bankruptcy Court ordered the payment of post-petition interest payments on EFIH First Lien Notes in connection with the settlement discussed in Note 6. Other than these amounts ordered by the Bankruptcy Court, effective April 29, 2014, EFIH discontinued recording interest expense on outstanding pre-petition debt classified as liabilities subject to compromise (LSTC). Interest expense as calculated under the contractual terms of EFIH's pre-petition debt, all of which is subject to compromise, would have totaled $363 million for the post-petition period through December 31, 2014. This amount exceeded actual interest expense recorded, which represented $54 million in interest since the Bankruptcy Filing, by $309 million.

Reorganization_Items_Notes

Reorganization Items (Notes)	12 Months Ended
	Dec. 31, 2014
Reorganization Items [Abstract]
Reorganization Items [Text Block]
	7	REORGANIZATION ITEMS
	Expenses and income directly associated with the Chapter 11 Cases are reported separately in the condensed statements of consolidated income (loss) as reorganization items as required by ASC 852, Reorganizations. Reorganization items also include adjustments to reflect the carrying value of liabilities subject to compromise (LSTC) at their estimated allowed claim amounts, as such adjustments are determined. The following table presents reorganization items incurred since the Petition Date as reported in the statements of consolidated income (loss):
		Post-Petition Period Through
		31-Dec-14
	Loss on exchange and settlement of EFIH First Lien Notes (Note 6)	$	108
	Fees associated with completion of EFIH DIP Facility	94
	Expenses related to legal advisory and representation services	50
	Expenses related to other professional consulting and advisory services	15
	Total reorganization items	$	267

Debt

Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Debt	The amounts classified as liabilities subject to compromise (LSTC) reflect the company's estimate of pre-petition liabilities and other expected allowed claims to be addressed in the Chapter 11 Cases and may be subject to future adjustment as the Chapter 11 Cases proceed. Debt amounts include related unamortized deferred financing costs, discounts or premiums. The following table presents LSTC as reported in the consolidated balance sheets at December 31, 2014:
		December 31,
		2014
	Notes, loans and other debt per the following table	$	3,843
	Accrued interest on notes, loans and other debt	138
	Advances and other payables to affiliates	7
	Total liabilities subject to compromise	$	3,988
	Pre-Petition Notes, Loans and Other Debt Reported as Liabilities Subject to Compromise
	Amounts reported below as of December 31, 2014 represent principal amounts of pre-petition notes, loans and other debt reported as liabilities subject to compromise. Amounts reported below as of December 31, 2013 represent notes, loans and other debt reported as current liabilities in EFIH's consolidated balance sheets. All pre-petition notes, loans and other debt outstanding as of December 31, 2014 are classified as LSTC.
		December 31,
		2014			2013
	Debt issued by EFIH:
	6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 (a)	$	—		$	503
	10% Fixed Senior Secured First Lien Notes due December 1, 2020 (a)	—			3,482
	11% Fixed Senior Secured Second Lien Notes due October 1, 2021	406			406
	11.75% Fixed Senior Secured Second Lien Notes due March 1, 2022	1,750			1,750
	11.25%/12.25% Senior Toggle Notes due December 1, 2018	1,566			1,566
	9.75% Fixed Senior Notes due October 15, 2019	2			2
	Unamortized premium	243			284
	Unamortized discount	(121		)	(146		)
	Total debt issued by EFIH	3,846			7,847
	Pushed down debt (b):
	10.875% EFH Corp. Fixed Senior Notes due November 1, 2017	17			17
	11.25%/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017	13			13
	Total pushed down debt	30			30
	Deferred debt issuance costs (c)	(33		)	—
	Total debt	$	3,843		$	7,877
	________________
	(a)	The EFIH First Lien Notes were exchanged or settled in June 2014 (see Note 6).
	(b)	Represents 50% of the amount of these EFH Corp. securities guaranteed by EFIH and pushed down per the discussion below under "Guarantees and Push Down of EFH Corp. Debt."
	(c)	Deferred debt issuance costs were reported in other noncurrent assets at December 31, 2013.
	Repayment of EFIH Second Lien Notes
	In March 2015, with the approval of the Bankruptcy Court, EFIH used some of its cash to repay (Repayment) $735 million, including interest at contractual rates, in amounts outstanding under EFIH's pre-petition 11.00% Second Lien Notes due 2021 (11.00% Notes) and 11.75% Second Lien Notes due 2022 (11.75% Notes) and $15 million in certain fees and expenses of the trustee for such notes. The Repayment required the requisite consent of the lenders under its EFIH DIP Facility. EFIH received such consent from approximately 97% of the lenders under the EFIH DIP Facility and paid an aggregate consent fee equal to approximately $13 million. As a result of the Repayment, as of the date hereof, the principal amount outstanding on the 11.00% Notes and 11.75% are $322 million and $1.388 billion, respectively.
	Debt Related Activity in 2013
	Principal amounts of debt issued in the year ended December 31, 2013 totaled $1.564 billion. These issuances consisted of $1.302 billion of EFIH 10% Notes issued in exchanges as discussed below, $173 million of EFIH Toggle Notes issued though the PIK election in lieu of making cash interest payments, and $89 million of EFIH Toggle Notes issued in debt exchanges as discussed below.
	EFIH Debt Exchanges and Distributions Involving EFH Corp. Debt — In exchanges in January 2013, EFIH and EFIH Finance issued $1.302 billion principal amount of EFIH 10% Senior Secured Notes due 2020 (New 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 9.75% Senior Secured Notes due 2019 (EFIH 9.75% Notes). The New EFIH 10% Notes had terms and conditions substantially the same as the existing EFIH 10% Notes discussed below. EFIH cancelled the EFIH notes it received in the exchanges.
	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 and EFIH received the requisite consents from holders of the EFIH 9.75% Notes to certain amendments to the respective indentures governing such notes. These amendments, among other things, (i) eliminated EFIH's pledge of its 100% ownership of the membership interests it owns in Oncor Holdings as collateral for the EFIH 9.75% Notes, (ii) made EFCH and EFIH unrestricted subsidiaries under the EFH Corp. 9.75% Notes and EFH Corp. 10% Notes, thereby eliminating EFCH's unsecured and EFIH's secured guarantees of the notes, (iii) eliminated substantially all of the restrictive covenants in the indentures and (iv) eliminated certain events of default, modified covenants regarding mergers and consolidations and modified or eliminated certain other provisions in these indentures.
	In additional exchanges in January 2013, EFIH and EFIH Finance issued $89 million principal amount of additional 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), (iii) $2 million principal amount of EFH Corp. 5.55% Series P Notes due 2014 (EFH Corp. 5.55% Notes) and (iv) $29 million principal amount of EFH Corp. 6.50% Series Q Notes due 2024 (EFH Corp. 6.50% Notes). The additional EFIH Toggle Notes have the same terms and conditions as the existing EFIH Toggle Notes discussed below.
	In the first quarter of 2013, EFIH distributed to EFH Corp. $6.360 billion principal amount of EFH Corp. debt that it previously received in debt exchanges, including $1.235 billion received in January 2013. EFH Corp. cancelled the notes, leaving $1.361 billion principal amount of affiliate debt still held by EFIH. The distribution included $3.474 billion principal amount of EFH Corp. Toggle Notes, $1.715 billion principal amount of EFH Corp. 10.875% Notes, $1.058 billion principal amount of EFH Corp. 10% Notes and $113 million principal amount of EFH Corp. 9.75% Notes.
	Accounting and Income Tax Effects of the January 2013 Debt Exchanges — In consideration of the circumstances and terms of the exchanges, accounting rules require that the net loss on the exchanges, which totaled $21 million, be deferred and amortized to interest expense over the life of the debt issued. The deferred loss is reported as debt discount associated with the EFIH 10% Notes and EFIH Toggle Notes. The deferred loss and the related deferred tax liability were pushed down to EFIH as a membership interests transaction.
	Guarantees 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 EFIH's financial statements. Merger-related debt of EFH Corp. held by its subsidiaries is not subject to push down.
	Pre-petition debt guaranteed and subject to push down at December 31, 2014 totals $60 million and consists of $33 million principal amount of EFH Corp. 10.875% Notes and $27 million principal amount of EFH Corp. Toggle Notes. The amount reflected in EFIH's consolidated balance sheets as pushed down pre-petition debt ($30 million at both December 31, 2014 and 2013, as shown in the 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., EFIH records the settlement of such amounts as noncash capital contributions from EFH Corp.
	There were no payments of interest by EFH Corp. on pre-petition debt pushed down for the year ended December 31, 2014. EFH Corp. payments of interest on debt pushed down totaled $23 million, and $53 million for the years ended December 31, 2013,and 2012, respectively.
	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, December 31, 2013 and December 31, 2014, respectively.
			31-Dec-12
	Securities Guaranteed (principal amounts)		Held by EFIH			Subject to Push Down		Not Merger-Related		Total Guaranteed		Debt Cancelled in 2013 (c)		Total Guaranteed December 31, 2013 and 2014 (d)
	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 12.
	(c)	See Note 8 for discussion of debt distributions and cancellations.
	(d)	These amounts are subject to push down.
	Information Regarding Significant Pre-Petition Debt
	EFIH 6.875% Senior Secured First Lien Notes — There were no principal amounts of the EFIH 6.875% Notes outstanding at December 31, 2014 as the notes were exchanged or settled in June 2014 as discussed in Note 6. The notes bore interest at a fixed rate of 6.875% per annum. The EFIH 6.875% Notes were secured on a first-priority basis by EFIH's pledge of its 100% ownership of the membership interests in Oncor Holdings (the EFIH Collateral) on an equal and ratable basis with the EFIH 10% Notes (discussed below).
	EFIH 10% Senior Secured First Lien Notes — There were no principal amounts of the EFIH 10% Notes outstanding at December 31, 2014 as the notes were exchanged or settled in June 2014 as discussed in Note 6. The notes bore interest at a fixed rate of 10% per annum. The notes were secured by the EFIH Collateral on an equal and ratable basis with the EFIH 6.875% Notes.
	EFIH 11% Senior Secured Second Lien Notes — The principal amount of the EFIH 11% Notes totals $406 million with interest at a fixed rate of 11% per annum. The EFIH 11% Notes are secured on a second-priority basis by the EFIH Collateral on an equal and ratable basis with the EFIH 11.75% Notes. See discussion above related to the repayment of a portion of these notes in March 2015.
	The EFIH 11% Notes are senior obligations of EFIH and EFIH Finance and rank equally in right of payment with all senior indebtedness of EFIH and are effectively senior in right of payment to all existing or future unsecured debt of EFIH to the extent of the value of the EFIH Collateral. The notes have substantially the same terms as the EFIH 11.75% Notes discussed below, and the holders of the EFIH 11% Notes will generally vote as a single class with the holders of the EFIH 11.75% Notes.
EFIH 11.75% Senior Secured Second Lien Notes — The principal amount of the EFIH 11.75% Notes totals $1.750 billion with interest at a fixed rate of 11.75% per annum. The EFIH 11.75% Notes are secured on a second-priority basis by the EFIH Collateral on an equal and ratable basis with the EFIH 11% Notes. The EFIH 11.75% Notes have substantially the same covenants as the EFIH 11% Notes, and the holders of the EFIH 11.75% Notes will generally vote as a single class with the holders of the EFIH 11% Notes. See discussion above related to the repayment of a portion of these notes in March 2015.
The EFIH 11.75% Notes were issued in private placements and are not registered under the Securities Act. EFIH had agreed to use its commercially reasonable efforts to register with the SEC notes having substantially identical terms as the EFIH 11.75% Notes (except for provisions relating to transfer restrictions and payment of additional interest) as part of an offer to exchange freely tradable notes for the EFIH 11.75% Notes. Because the exchange offer was not completed, the annual interest rate on the EFIH 11.75% Notes increased by 25 basis points (to 12.00%) on February 6, 2013 and by an additional 25 basis points (to 12.25%) on May 6, 2013.
EFIH 11.25%/12.25% Senior Toggle Notes — The principal amount of the EFIH Toggle Notes totals $1.566 billion with interest at a fixed rate of 11.25% per annum for cash interest and 12.25% per annum for PIK Interest. The terms of the Toggle Notes include an election by EFIH, for any interest period until June 1, 2016, to pay interest on the Toggle Notes (i) entirely in cash; (ii) by increasing the principal amount of the notes or by issuing new EFIH Toggle Notes (PIK Interest); or (iii) 50% in cash and 50% in PIK Interest. EFIH made its pre-petition interest payments on the EFIH Toggle Notes by using the PIK feature of those notes.
The EFIH Toggle Notes were issued in private placements and are not registered under the Securities Act. EFIH had agreed to use its commercially reasonable efforts to register with the SEC notes having substantially identical terms as the EFIH Toggle Notes (except for provisions relating to transfer restrictions and payment of additional interest) as part of an offer to exchange freely tradable notes for the EFIH Toggle Notes. Because the exchange offer was not completed, the annual interest rate on the EFIH Toggle Notes increased by 25 basis points (to 11.50%) in December 2013 and by an additional 25 basis points (to 11.75%) in March 2014.
Material Cross Default/Acceleration Provisions — Certain of EFIH's pre-petition financing arrangements contain provisions that result in an event of default if there were a failure under other financing arrangements to meet payment terms or to observe other covenants that could or does result in an acceleration of payments due. Such provisions are referred to as cross default or cross acceleration provisions. The Bankruptcy Filing triggered defaults on EFIH's pre-petition debt obligations, but pursuant to the Bankruptcy Code, the creditors are stayed from taking any actions against the Debtors as a result of such defaults.
EFIH Collateral Trust Agreement — EFIH entered into a Collateral Trust Agreement, among EFIH, The Bank of New York Mellon Trust Company, N.A., as First Lien Trustee, the other Secured Debt Representatives named therein and the Collateral Trustee. The Collateral Trust Agreement governing the pledge of collateral generally provides that the holders of a majority of the debt secured by a first priority lien on the collateral, including the notes and other future debt incurred by EFH or EFIH secured by the collateral equally and ratably, have, subject to certain limited exceptions, the exclusive right to manage, perform and enforce the terms of the security documents securing the rights of secured debt holders in the collateral, and to exercise and enforce all privileges, rights and remedies thereunder.

Commitments_And_Contingencies

Commitments And Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies	COMMITMENTS AND CONTINGENCIES
	Guarantees
	See Note 8 for discussion of EFIH's guarantees of certain EFH Corp. debt.
	Legal Proceedings
	From time to time, EFIH may be involved in various legal and administrative proceedings in the normal course of business, the ultimate resolutions of which, in the opinion of management, should not have a material effect upon its financial condition, results of operations or liquidity.
	Make-whole Claims — In May 2014, the indenture trustee for the EFIH 10% First Lien Notes initiated litigation in the Bankruptcy Court seeking, among other things, a declaratory judgment that EFIH is obligated to pay a make-whole premium in connection with the cash repayment of the EFIH First Lien Notes discussed in Note 6 and that such make-whole premium is an allowed secured claim (EFIH First Lien Make-whole Claims). The indenture trustee has alleged that the EFIH First Lien Make-whole Claims are valued at approximately $432 million plus reimbursement of expenses. Following argument and briefing on cross motions for summary judgment, in March 2015, the Bankruptcy Court issued a ruling and order in favor of the EFIH Debtors on almost all issues, including denying the indenture trustee's motion for summary judgment in full and granting the EFIH Debtors summary judgment on most counts. The remaining open issues are currently scheduled to be heard at a trial beginning on April 20, 2015.
	In June 2014, the indenture trustee for the EFIH Second Lien Notes initiated litigation in the Bankruptcy Court seeking similar relief with respect to the EFIH Second Lien Notes, including among other things, that EFIH is obligated to pay a make-whole premium in connection with any repayment of the EFIH Second Lien Notes and that such make-whole premium would be an allowed secured claim (the EFIH Second Lien Make-whole Claims). In the EFIH Second Lien Make-whole Claims, as of December 31, 2014, the amount of such claims alleged would have been equal to approximately $591 million plus reimbursement of expenses. In December 2014, the EFIH Debtors filed counterclaims for relief against the Second Lien indenture trustee, seeking declaratory relief that, among other things, EFIH is not obligated to pay a make-whole premium in connection with any repayment of the EFIH Second Lien Notes and that such make-whole premium, if owing, would not constitute an allowed secured claim (EFIH Second Lien Counterclaims). In December 2014, the indenture trustee for the EFIH Second Lien Notes opposed the EFIH Debtors' motion to assert the EFIH Second Lien Counterclaims and also moved to dismiss its own complaint for relief, arguing that it was no longer necessary to resolve the EFIH Second Lien Make-whole Claims given that the EFIH Debtors had withdrawn their motion to repay the EFIH Second Lien Notes. However, as a result of EFIH’s partial repayment of the EFIH Second Lien Notes, the parties have agreed that the litigation is ripe for adjudication. The parties are currently working together on a schedule to propose to the Bankruptcy Court in order to adjudicate this matter.
	In December 2014, the EFIH Debtors initiated litigation against the indenture trustee for the EFIH PIK Notes seeking, among other things, a declaratory judgment that EFIH is not obligated to pay a make-whole premium in connection with the cash repayment of the EFIH PIK Notes and that any post-petition interest owing on these notes is to be paid at the statutory Federal Judgment Rate of interest. The indenture trustee for the EFIH PIK Notes filed a motion in February 2015 to dismiss the EFIH Debtors' complaint for declaratory relief, and the EFIH Debtors filed a brief in opposition to that motion in February 2015. If a make-whole claim was allowed, as of December 31, 2014, such claims would be approximately $100 million. The Bankruptcy Court has not yet announced a schedule for hearing argument or ruling on the indenture trustee's motion to dismiss.
	In addition, creditors may make additional claims in the Chapter 11 Cases for make-whole or redemption premiums in connection with repayments or settlement of other pre-petition debt. These claims could be material. There can be no assurance regarding the outcome of any of the litigation regarding the validity or, if deemed valid, the amount of these make-whole or redemption claims.
	Potential Inter/Intra Debtor Claims
	In August 2014, the Bankruptcy Court entered an order in the Chapter 11 Cases establishing discovery procedures governing, among other things, certain prepetition transactions among the various Debtors' estates. In February 2015, the ad hoc committee of certain TCEH unsecured noteholders; the official committee representing unsecured interests at EFCH and its direct subsidiary, TCEH; and the official committee representing unsecured interests at EFH and EFIH filed motions with the Bankruptcy Court seeking standing to prosecute derivative claims on behalf of TCEH relating to certain of these prepetition transactions. These motions are currently scheduled to be heard by the Bankruptcy Court at the Debtors' omnibus hearing in April 2015. In addition to the claims described above, certain of the Debtors (or creditors purporting to act derivatively in the name of a Debtor) may bring additional inter-Debtor or intra-Debtor claims (including claims under the Federal and State Income Tax Allocation Agreement among EFH Corp. and certain of its subsidiaries under which TCEH and EFH Corp. have previously filed claims in the Chapter 11 Cases) that could be material in amount. EFIH cannot predict the timing or outcome of future proceedings, if any, related to these transactions. The outcome of any of these claims could be material and could affect the results of operation, liquidity or financial condition of a particular Debtor.

Membership_Interests

Membership Interests	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Membership Interests	MEMBERSHIP INTERESTS
	Cash Distributions
	In January 2013, EFIH's board of directors declared, and EFIH paid, a cash distribution to EFH Corp. of $680 million (which as of December 31, 2012 was recorded as restricted cash), which was used by EFH Corp. to settle the TCEH Demand Notes (see Note 12).
	In February 2012, EFIH's board of directors declared, and EFIH paid, a cash distribution to EFH Corp. of $950 million, which was used by EFH Corp. to partially settle the TCEH Demand Notes. EFIH did not declare or pay any cash distributions for the year ended December 31, 2012.
	Distribution Restrictions
	The agreement governing the EFIH DIP Facility generally restricts EFIH's ability to make distributions or loans to any of its parent companies or their subsidiaries unless such distributions or loans are expressly permitted under the agreement governing such facility.
	Under applicable law, EFIH is prohibited from paying any dividend to the extent that immediately following payment of such dividend, there would be no statutory surplus or EFIH would be insolvent. In addition, due to the Chapter 11 Cases, no dividends are eligible to be paid without the approval of the Bankruptcy Court.
	Noncash Distributions to EFH Corp.
	See Notes 8 and "Affiliate Debt Held by EFIH" below for details of debt securities EFIH acquired in debt exchange transactions in December 2012 and January 2013 and securities returned to EFH Corp. The indentures governing EFIH's debt do not limit its ability to dividend EFH Corp. debt securities to EFH Corp. so long as EFIH received such securities in exchange for the issuance of EFIH debt.
	Equity Interests in Oncor
	At December 31, 2014, ownership of Oncor's membership interests was as follows: 80.03% held indirectly by EFH Corp., 0.22% held indirectly by Oncor's management and board of directors and 19.75% held by Texas Transmission.
	Capital Contributions
	See Notes 1 and 8 for discussion of noncash contributions from EFH Corp. related to debt pushed down to EFIH in accordance with SEC Staff Accounting Bulletin Topic 5-J.
	Affiliate Debt Held by EFIH
	As a result of debt exchanges in 2009 through 2013, EFIH held debt securities of EFH Corp. and TCEH as presented in the table below. In December 2012, management determined that some or all of these securities may be returned as dividends to EFH Corp.; accordingly, the balances were reclassified at that time from investment in debt of affiliates and reported as a reduction of membership interests. The securities are no longer marked-to-market. Interest income is no longer accrued and interest received reduces the carrying value of the securities and thus increases membership interests. Interest received in 2013 totaled $252 million. As a result of the Bankruptcy Filing, EFIH does not expect to receive further interest payments on affiliate debt it holds.
	Prior to December 2012, when the debt securities were reported as investment in debt of affiliates, the securities were classified as available for sale, interest was recorded in the income statement as interest income and unrealized gains or losses were recorded in other comprehensive income unless such losses were other than temporary, in which case they were recorded as impairments in net income.
	In the first quarter 2013, EFIH distributed to EFH Corp. $6.360 billion principal amount ($5.778 billion carrying amount) of EFH Corp. debt that it previously received in debt exchanges, leaving $1.361 billion principal amount of affiliate debt still held by EFIH. EFH Corp. cancelled the notes. The $6.360 billion principal amount consisted of $5.125 billion of debt held at December 31, 2012 and $1.235 billion (of the $1.266 billion) received in debt exchanges in January 2013 (see Note 8). The distribution 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.
	In the fourth quarter 2012, EFIH distributed to EFH Corp. $158 million principal amount ($160 million carrying amount) of EFH Corp. debt that it previously received in debt exchanges. EFH Corp. cancelled the notes. The distribution included $119 million principal amount of EFH Corp. Toggle Notes and $39 million principal amount of EFH 10.875% Notes.
	The principal amounts, coupon rates, maturities and carrying value of debt of affiliates held at both December 31, 2014 and 2013 are as follows:
			Principal Amount			Carrying Value
	EFH Corp. 5.55% Fixed Senior Notes Series P due November 15, 2014		$	281		$	185
	EFH Corp. 6.50% Fixed Senior Notes Series Q due November 15, 2024		545			249
	EFH Corp. 6.55% Fixed Senior Notes Series R due November 15, 2034		456			194
	TCEH 10.25% Fixed Senior Notes due November 1, 2015 (both periods include $48 million principal amount of Series B Notes)		79			7
	Balance reported as reduction in membership interests		$	1,361		$	635
	In 2013, as a result of the distribution of all the EFH Corp. 10.875% Notes and EFH Corp. Toggle Notes EFIH held, EFIH recorded a gain of $284 million (pretax) representing the reclassification to interest income of mark-to-market gains previously recorded in accumulated other comprehensive income (AOCI).
	The indentures governing the EFIH Notes do not limit EFIH's ability to distribute the EFH Corp. debt securities that it holds to EFH Corp. so long as it received such securities in exchange for the issuance of EFIH debt, which applies to all the EFH Corp. debt EFIH currently holds.
	Impairments — In 2012, EFIH deemed the declines in values of the TCEH securities were other than temporary and recorded a $14 million impairment, which is reported as a reduction of interest income. EFIH considered that the securities were in a loss position for an extended period and the effects of low wholesale power prices on the profitability and cash flows of TCEH (which has below investment grade credit ratings) were unlikely to reverse in the near term.
	Prior to December 2012, the debt securities were reported as investment in affiliate debt and EFIH determined value under the fair value hierarchy established in accounting standards. Under the fair value hierarchy, Level 2 valuations are based on prices that reflect observable market information, such as actual trade information of similar securities, adjusted for observable differences. The fair value of EFIH's investment in debt of affiliates was estimated at the lesser of either the call price or the market value as determined by broker quotes and quoted market prices for similar securities in active markets. For the periods presented, the fair values of EFIH's investment in debt of affiliates represented Level 2 valuations.
	Accumulated Other Comprehensive Income (Loss)
	The following table presents the changes to accumulated other comprehensive income (loss) for the year ended December 31, 2014.
		Dedesignated Cash Flow Hedges - Oncor			Changes in Fair Values of Investment in Debt Securities of Affiliates			Pension and Other Postretirement Employee Benefit Liabilities Adjustments - Oncor			Total Accumulated Other Comprehensive Income (Loss)
	Balance at December 31, 2013	$	(21	)	$	—		$	(18	)	$	(39	)
	Other comprehensive loss before reclassifications (after tax)	—			—			(49		)	(49		)
	Amounts reclassified from accumulated other comprehensive income (loss) and reported in:
	Equity in earnings of unconsolidated subsidiaries	2			—			—			2
	Total amount reclassified from accumulated other comprehensive income (loss) during the period	2			—			—			2
	Total change during the period	2			—			(49		)	(47		)
	Balance at December 31, 2014	$	(19	)	$	—		$	(67	)	$	(86	)
	The following table presents the changes to accumulated other comprehensive income (loss) for the year ended December 31, 2013.
		Dedesignated Cash Flow Hedges - Oncor			Changes in Fair Values of Investment in Debt Securities of Affiliates			Pension and Other Postretirement Employee Benefit Liabilities Adjustments - Oncor			Total Accumulated Other Comprehensive Income (Loss)
	Balance at December 31, 2012	$	(23	)	$	185		$	(2	)	$	160
	Other comprehensive loss before reclassifications (after tax)	—			—			(16		)	(16		)
	Amounts reclassified from accumulated other comprehensive income (loss) and reported in:
	Interest income	—			(284		)	—			(284		)
	Equity in earnings of unconsolidated subsidiaries	2			—			—			2
	Income tax benefit	—			99			—			99
	Total amount reclassified from accumulated other comprehensive income (loss) during the period	2			(185		)	—			(183		)
	Total change during the period	2			(185		)	(16		)	(199		)
	Balance at December 31, 2013	$	(21	)	$	—		$	(18	)	$	(39	)

RelatedParty_Transactions

Related-Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related-Party Transactions	The following represent EFIH's significant related-party transactions. Also see Note 11 for a discussion of EFH Corp. and TCEH debt securities held by EFIH.
	•	EFH Corp. allocates expense to EFIH for management fees owed by EFH Corp. to the Sponsor Group. This expense, which is reported in SG&A expenses, totaled $3 million for the year ended December 31, 2014. There was no allocation of fees to EFIH for the years ended December 31, 2013 and 2012. Beginning with the quarterly management fee due December 31, 2013, the Sponsor Group, while reserving the right to receive the fees, directed EFH Corp. to suspend payments of the management fees for an indefinite period. Accordingly, EFIH did not reimburse EFH Corp. for the allocated management fees. Effective with the Petition Date, EFH Corp. suspended allocations of such fees to EFIH. Fees accrued as of the Petition Date have been reclassified to liabilities subject to compromise (LSTC).
	In addition to amounts incurred directly by EFIH, a subsidiary of EFH Corp. allocates costs to EFIH for legal and other consulting services associated with EFIH's debt restructuring activities, and EFIH reimburses the subsidiary for the allocated costs on a monthly basis. The allocated expense, which was reported in SG&A expenses up through the Petition Date, totaled $4 million and $12 million for the years ended December 31, 2014 and 2013, respectively. There was no allocation of legal and other consulting services costs to EFIH for the year ended December 31, 2012.
	A subsidiary of EFH Corp. bills EFIH for administrative services such as accounting and finance at cost, and EFIH reimburses the subsidiary for the allocated costs on a monthly basis. This expense, which is reported in SG&A expenses, totaled $4 million for the year ended December 31, 2014. There was no allocation of administrative service costs to EFIH for the years ended December 31, 2013 and 2012.
	•	EFH Corp. files consolidated federal income tax and Texas state margin tax returns, and under a Federal and State Income Tax Allocation Agreement, allocates income taxes to EFIH substantially as if it were filing its own corporate income tax returns. At December 31, 2014 and 2013, EFIH had current income tax receivables from EFH Corp. totaling $125 million and $110 million, respectively, both of which were fully reserved (see Note 5). EFIH made no income tax payments to EFH Corp. for the year ended December 31, 2014. EFIH's income tax refunds from EFH Corp. totaled $5 million for the year ended December 31, 2013, and income tax payments to EFH Corp. totaled $180 million for the year ended December 31, 2012. See discussion below in this Note regarding allocation of income tax liabilities to Oncor Holdings and Oncor under the Federal and State Income Tax Allocation Agreement.
	•	At December 31, 2012, EFH Corp. had demand notes payable to TCEH (TCEH Demand Notes) totaling $698 million arising from borrowings used to fund EFH Corp. debt principal and interest payments and net borrowings for general corporate purposes. EFIH was a guarantor of these demand notes. EFH Corp. settled the balance of the TCEH Demand Notes in January 2013 using the cash distribution from EFIH discussed in Note 11.
	•	In January 2013, fees paid to Goldman, Sachs & Co. (Goldman), an affiliate of GS Capital Partners, for services related to debt exchanges totaled $2 million, described as follows: (i) Goldman acted as a dealer manager for the offers by EFIH and EFIH Finance to exchange new EFIH 10% Notes for EFH Corp. 9.75% Notes, EFH Corp. 10% Notes and EFIH 9.75% Notes (collectively, the Old Notes) and as a solicitation agent in the solicitation of consents by EFH Corp. and EFIH and EFIH Finance to amendments to the Old Notes and indentures governing the Old Notes and (ii) Goldman acted as a dealer manager for the offers by EFIH and EFIH Finance to exchange EFIH Toggle Notes for EFH Corp. 10.875% Notes and EFH Corp. Toggle Notes. See Note 8 for further discussion of these exchange offers.
	For the year ended December 31, 2012, fees paid to Goldman related to debt issuances totaled $10 million, described as follows: (i) Goldman acted as a joint book-running manager and initial purchaser in the February 2012 issuance of $1.15 billion principal amount of EFIH 11.750% Notes for which it received fees totaling $7 million; and (ii) Goldman acted as joint book-running manager and initial purchaser in the August 2012 issuance of $600 million principal amount of 11.750% Notes and $250 million principal amount of EFIH 6.875% Notes for which it received fees totaling $3 million. In the October 2012 issuance of $253 million principal amount of EFIH 6.875% Notes, Goldman acted as joint book-running manager and initial purchaser for which it was paid $1 million. A broker-dealer affiliate of KKR served as a co-manager and initial purchaser and an affiliate of TPG served as an advisor in both of these transactions, for which they each received a total of $4 million.
	•	Affiliates of the Sponsor Group have sold or acquired, and in the future may sell or acquire, debt or debt securities issued by EFIH in open market transactions or through loan syndications.
	See Note 8 regarding guarantees and push-down of certain EFH Corp. pre-petition debt and Note 11 regarding distributions to, and contributions from, EFH Corp.
	Significant related-party transactions between Oncor Holdings (including its consolidated subsidiary Oncor) and EFH Corp., other affiliates of EFH Corp. and the Sponsor Group are as follows:
	•	Oncor receives payments from subsidiaries of TCEH for services it provides, principally the delivery of electricity. Revenues recorded by Oncor for these services totaled approximately $1.0 billion for each of the years ended December 31, 2014, 2013 and 2012. The fees are based on rates regulated by the PUCT that apply to all REPs. These revenues from subsidiaries of TCEH represented 25%, 27% and 29% of Oncor Holdings' operating revenues for the years ended December 31, 2014, 2013 and 2012, respectively. Oncor Holdings' balance sheets at December 31, 2014 and 2013 reflect receivables from affiliates totaling $118 million and $135 million, respectively, consisting almost entirely of trade receivables from subsidiaries of TCEH 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. The settlement was executed by EFIH acquiring the right to reimbursement under the agreements from Oncor and then selling these rights for the same amount to TCEH. The transaction resulted in a decrease of approximately $2 million (after tax) in Oncor's membership interests in accordance with accounting rules for related party transactions. Accordingly, the transaction resulted in a decrease of approximately $1 million (reflecting EFIH's 80% interest in Oncor) in EFIH's investment in unconsolidated subsidiary with an offsetting decrease in equity.
	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 $20 million for the year ended December 31, 2012.
	Under an interest reimbursement agreement, TCEH had reimbursed Oncor on a monthly basis for interest expense on the transition bonds. The remaining interest to be paid through 2016 under the agreement totaled $53 million at the August 2012 settlement date. Only the monthly accrual of interest under this agreement was reported as a receivable by Oncor. This interest income prior to the August 2012 settlement totaled $16 million for the year ended December 31, 2012.
	•	Oncor pays EFH Corp. subsidiaries for financial and other administrative services and shared facilities at cost. Such amounts increased Oncor's reported operation and maintenance expense by $34 million, $32 million and $35 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	•	Under Texas regulatory provisions, the trust fund for decommissioning the Comanche Peak nuclear generation facility (reported on TCEH's consolidated balance sheets) is funded by a delivery fee surcharge collected from REPs by Oncor, as collection agent, and remitted monthly to TCEH. The delivery fee surcharges remitted to TCEH totaled $17 million for the year ended December 31, 2014 and $16 million for each of the years ended December 31, 2013 and 2012.
	•	EFH Corp. files a consolidated federal income tax return that includes Oncor Holdings' results. Oncor is not a member of EFH Corp.'s consolidated tax group, but EFH Corp.'s consolidated federal income tax return includes EFH Corp.'s portion of Oncor's results as a result of EFH Corp.'s equity ownership in Oncor. EFH Corp. also files a consolidated Texas state margin tax return that includes all of Oncor Holdings' and Oncor's results. However, under a Federal and State Income Tax Allocation Agreement, Oncor Holdings and Oncor record their federal income tax and Texas state margin taxes as if Oncor Holdings and Oncor were filing their own corporate income tax returns.
	At December 31, 2014, Oncor Holdings had a net current receivable from EFH Corp. related to federal and state income taxes totaling $120 million, all of which related to Oncor. The $120 million net receivable from EFH Corp. included a $144 million federal income tax receivable offset by a $24 million state margin tax payable. Additionally, Oncor has a noncurrent tax receivable from EFH Corp. of $64 million. At December 31, 2013, Oncor Holdings had a current payable to EFH Corp. related to federal and state income taxes totaling $7 million, which includes $5 million payable by Oncor. Oncor's liability at December 31, 2013 consists of a $23 million state margin tax payable net of an $18 million federal income tax receivable.
	For the year ended December 31, 2014, Oncor Holdings and Oncor made net federal and state income tax payments to EFH Corp. totaling $24 million and $237 million, respectively. For the year ended December 31, 2013, Oncor Holdings and Oncor made net federal and state income tax payments to EFH Corp. totaling $34 million and $90 million, respectively. The 2013 net payment included $33 million from Oncor related to the 1997 through 2002 IRS appeals settlement and a $10 million refund paid to Oncor related to the filing of amended Texas franchise tax returns for 1997 through 2001. For the year ended December 31, 2012, Oncor Holdings and Oncor made net federal and state income tax payments to EFH Corp. totaling $35 million and $3 million, respectively. The 2012 net payment included a $21 million federal income tax refund paid to Oncor Holdings.
	•	Oncor has 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 Oncor Electric Delivery Transition Bond Company LLC. Under these requirements, and as a result of TCEH's credit rating being below investment grade, TCEH is required to post collateral support in an amount equal to estimated transition charges over specified time periods. Accordingly, at both December 31, 2014 and 2013, TCEH had posted letters of credit and/or cash in the amount of $9 million for Oncor's benefit.
	•	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.
	•	Affiliates of the Sponsor Group have (1) sold or acquired Oncor's debt or debt securities in open market transactions or through loan syndications, and (2) performed various financial advisory, dealer, commercial banking and investment banking services for Oncor and certain of its affiliates for which they have received customary fees and expenses.
	•	Oncor has participated in plans sponsored by EFH Corp. that provide pension, health care and other retiree benefits. Accordingly, Oncor Holdings' consolidated financial statements have reflected allocations to Oncor of amounts related to these retiree benefit plans. In accordance with an agreement between EFH Corp. and Oncor, Oncor ceased participation in EFH Corp.'s OPEB plan effective July 1, 2014 and established its own OPEB plan for Oncor's eligible existing and future retirees and their dependents. Additionally, the Oncor plan participants include those former participants in the EFH Corp. OPEB plan whose employment included service with both Oncor (or a predecessor regulated electricity business) and EFH Corp.'s competitive businesses (split service participants). Under the agreement, EFH Corp. will retain the liability for split service participants' benefits related to their years of service with the competitive business. The methodology for OPEB cost allocations between EFH Corp. and Oncor has not changed, and the plan separation does not materially affect the net assets or cash flows of EFIH.
	•	Until June 30, 2014, Oncor employees participated in a health and welfare benefit program offered by EFH Corp. In connection with Oncor establishing its own health and welfare benefits program, Oncor agreed to pay EFH Corp. $1 million to reimburse EFH Corp. for its increased costs of providing benefits under the EFH Corp. program as a result of Oncor's withdrawal and to compensate EFH Corp. for the administrative work related to the transition. This amount was paid in June 2014.
	Oncor's retained liability under the Employee Retirement Income Security Act of 1974 (ERISA) relates to the nonrecoverable portion of the unfunded obligation of EFH Corp.'s pension plan. In the first quarter of 2014, TCEH contributed $20 million to the EFH Corp. pension plan assets, resulting in the plan being fully funded as calculated under the provisions of ERISA.

Supplementary_Financial_Inform

Supplementary Financial Information	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Supplementary Financial Information	SUPPLEMENTARY FINANCIAL INFORMATION
	Fair Value of Debt
			December 31, 2014						31-Dec-13
	Debt:		Carrying Amount			Fair			Carrying Amount		Fair
						Value					Value
	Borrowings under debtor-in-possession credit facilities (Note 6)		$	5,400		$	5,400		$	—	$	—
	Pre-petition notes, loans and other debt reported as liabilities subject to compromise (Note 8)		3,876			4,336			—		—
	Pre-petition notes, loans and other debt (Note 8)		—			—			7,877		7,849
	EFIH determines fair value in accordance with accounting standards, and at December 31, 2014, EFIH's fair value for debt and liabilities subject to compromise represent Level 2 valuations. EFIH obtains security pricing from an independent party 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.
	Interest Income on Affiliate Securities — EFIH holds debt securities of EFH Corp. and TCEH. Prior to December 2012, when the debt securities were reported as investment in affiliate debt, the securities were classified as available for sale and interest was recorded in the income statement as interest income. In December 2012, management determined that some or all of these securities may be returned as dividends to EFH Corp.; accordingly, the balances were reclassified at that time from investment in affiliate debt and reported as a reduction of membership interests. As a result of the December 2012 reclassification of investment in debt of affiliates to membership interests, interest received in 2013 reduced the carrying value of the securities and thus increased membership interests. See Note 11.
		Year Ended December 31,
		2014			2013			2012
	Available-for-sale securities:
	Interest received/accrued	$	—		$	—		$	232
	Accretion of purchase discount	—			—			92
	PIK interest received/accrued related to EFH Corp. Toggle Notes	—			—			288
	Mark-to-market gain reclassified from AOCI	—			284			—
	Impairments related to issuer credit	—			—			(14		)
	Total interest	$	—		$	284		$	598
	Supplemental Cash Flow Information
		Year Ended December 31,
		2014			2013			2012
	Cash payments (receipts) related to:
	Interest paid	$	376		$	619		$	352
	Interest received on investments in debt of affiliates (net of tax) (a)	—			—			(184		)
	Income taxes	—			(5		)	180
	Reorganization items (b)	38			—			—
	Noncash investing and financing activities:
	Receipt of additional EFH Corp. Toggle Notes in lieu of cash interest	—			—			344
	Principal amount of toggle notes issued in lieu of cash interest (Note 8)	—			173			—
	Parent's payment of interest on pushed-down debt accounted for as a contribution of capital (net of tax) (Note 8) (c)	—			23			22
	Reduction of debt pushed down from EFH Corp. (Note 8) (d)	—			(420		)	(282		)
	Debt exchange transactions (e)	(85		)	14			457
	Distribution to EFH Corp. of debt held as an investment (Note 11)	—			(5,778		)	160
	Income tax on interest received on holdings of affiliate debt (Note 11)	—			(88		)	—
	____________
	(a)	Interest received in 2012 reported as an increase in membership interests (See Note 11).
	(b)	Represents cash payments for legal and other professional services reported in reorganization items (See Note 7).
	(c)	Reflects noncash settlement of certain income taxes payable arising as a result of the sale of noncontrolling interests in Oncor.
	(d)	For the year ended December 31, 2013, represents $838 million principal amount of EFH Corp. debt exchanged (at 50%). For the year ended December 31, 2012, represents $564 million principal amount of EFH Corp. debt exchanged (at 50%). See Note 8.
	(e)	For the year ended December 31, 2014, represents $1.836 billion principal amount of loans issued under the EFIH DIP Facility in excess of the $1.673 billion principal amount of EFIH First Lien Notes exchanged and $78 million of related accrued interest. For the year ended December 31, 2013 represents, $1.302 billion of EFIH debt issued in exchange for $1.310 billion of EFH Corp. and EFIH debt and $89 million of EFIH debt issued in exchange for $95 million of EFH Corp. debt. For the year ended December 31, 2012, represents $1.304 billion of EFIH debt issued in exchange for $1.761 billion of EFH Corp. debt. See Note 8.

Recovered_Sheet1

Business And Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation, Including Application of Bankruptcy Accounting
	The consolidated financial statements have been prepared in accordance with US GAAP. The consolidated financial statements have been prepared as if EFIH is a going concern and contemplate the realization of assets and liabilities in the normal course of business. The consolidated financial statements reflect the application of Financial Accounting Standards Board Accounting Standards Codification (ASC) 852, Reorganizations. During the pendency of the Bankruptcy Filing, the Debtors will operate their businesses as debtors-in-possession under the jurisdiction of the Bankruptcy Court and in accordance with the applicable provisions of the Bankruptcy Code. ASC 852 applies to entities that have filed a petition for bankruptcy under Chapter 11 of the Bankruptcy Code. The guidance requires that transactions and events directly associated with the reorganization be distinguished from the ongoing operations of the business. In addition, the guidance provides for changes in the accounting and presentation of liabilities. See Notes 7 and 8 for discussion of these accounting and reporting changes.
	EFIH's investment in Oncor Holdings does not meet accounting standards criteria for consolidation and is accounted for under the equity method (see Note 3). All intercompany items and transactions have been eliminated in consolidation. All dollar amounts in the financial statements and tables in the notes are stated in millions of US dollars unless otherwise indicated.
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 income and expense, including fair value measurements and estimates of expected allowed claims. 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.
Income Taxes	Income Taxes
	EFH Corp. files a consolidated US federal income tax return that includes the results of EFCH, EFIH, Oncor Holdings and TCEH. Oncor is a partnership for US federal income tax purposes and is not a corporate member of the EFH Corp. consolidated group. Deferred income taxes are provided for temporary differences between the book and tax basis of assets and liabilities as required under accounting rules.
Investment in Affiliate Debt	Investment in Affiliate Debt
	Investments in affiliate debt were classified as a reduction of membership interests effective December 31, 2012 (see Note 11). Prior to December 2012, investments in affiliate debt were classified as available-for-sale securities as assets in the balance sheet and were recorded at fair value with unrealized gains or losses recorded in other comprehensive income. EFIH evaluated its investment in affiliate debt for impairment and recorded an impairment loss if declines in fair value were deemed to be other than temporary, which occurred if it determined it would be unable to recover the carrying value of the investment. Impairments were accounted for as a reduction of interest income if related to the issuer's credit. If they were not related to the issuer's credit, the impairments were recorded in other comprehensive income.
Impairment of Equity Method Investments	Impairment of Equity Method Investments
	EFIH evaluates its investment in Oncor Holdings when factors indicate that a decrease in the value of the investment has occurred that is not temporary. Indications of a loss in value include recurring operating losses of the investee or fair value measures that are less than carrying value. An impairment loss is recognized if the carrying value of the investment is greater than the fair value of the investment, and the loss is not deemed temporary. Fair value is determined primarily by discounted cash flows, supported by available market valuations, if applicable.
Push-Down of Related Party Debt [Policy Text Block]	Push-Down of EFH Corp. Debt
	In accordance with SEC Staff Accounting Bulletin (SAB) Topic 5-J, EFIH reflects amounts of certain EFH Corp. 10.875% Notes and EFH Corp. Toggle Notes on its balance sheet and the related interest expense in its income statement. The amounts reflected on EFIH's balance sheet were calculated based upon the relative equity investment of EFCH and EFIH in their respective operating subsidiaries at the time of the Merger (see Note 8).

Investment_In_Oncor_Holdings_T

Investment In Oncor Holdings (Tables)	12 Months Ended
	Dec. 31, 2014
Investment In Oncor Holdings [Abstract]
Schedule of condensed statements of consolidated income of Oncor Holdings and its subsidiaries	Condensed statements of consolidated income of Oncor Holdings and its subsidiaries for the years ended December 31, 2014, 2013 and 2012 are presented below:
		Year Ended December 31,
		2014			2013			2012
	Operating revenues	$	3,822		$	3,552		$	3,328
	Operation and maintenance expenses	(1,453		)	(1,269		)	(1,171		)
	Depreciation and amortization	(851		)	(814		)	(771		)
	Taxes other than income taxes	(438		)	(424		)	(415		)
	Other income	13			18			26
	Other deductions	(15		)	(15		)	(64		)
	Interest income	3			4			24
	Interest expense and related charges	(353		)	(371		)	(374		)
	Income before income taxes	728			681			583
	Income tax expense	(289		)	(259		)	(243		)
	Net income	439			422			340
	Net income attributable to noncontrolling interests	(90		)	(87		)	(70		)
	Net income attributable to Oncor Holdings	$	349		$	335		$	270
Schedule of assets and liabilities of Oncor Holdings	Assets and liabilities of Oncor Holdings at December 31, 2014 and 2013 are presented below:
		December 31,
		2014			2013
	ASSETS
	Current assets:
	Cash and cash equivalents	$	5		$	28
	Restricted cash	56			52
	Trade accounts receivable — net	407			385
	Trade accounts and other receivables from affiliates	118			135
	Income taxes receivable from EFH Corp.	144			16
	Inventories	73			65
	Accumulated deferred income taxes	10			32
	Prepayments and other current assets	91			82
	Total current assets	904			795
	Restricted cash	16			16
	Other investments	97			91
	Property, plant and equipment — net	12,463			11,902
	Goodwill	4,064			4,064
	Regulatory assets — net	1,429			1,324
	Other noncurrent assets	67			71
	Total assets	$	19,040		$	18,263
	LIABILITIES
	Current liabilities:
	Short-term borrowings	$	711		$	745
	Long-term debt due currently	639			131
	Trade accounts payable — nonaffiliates	202			178
	Income taxes payable to EFH Corp.	24			23
	Accrued taxes other than income	174			169
	Accrued interest	93			95
	Other current liabilities	156			135
	Total current liabilities	1,999			1,476
	Accumulated deferred income taxes	1,978			1,905
	Long-term debt, less amounts due currently	4,997			5,381
	Other noncurrent liabilities and deferred credits	2,245			1,822
	Total liabilities	$	11,219		$	10,584

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	The components of EFIH's income tax expense (benefit) are as follows:
		Year Ended December 31,
		2014			2013			2012
	Current:
	US Federal	$	(104	)	$	(115	)	$	25
	State	—			1			4
	Deferred:
	US Federal	(52		)	(55		)	(2		)
	State	1			—			—
	Total income tax expense (benefit)	$	(155	)	$	(169	)	$	27
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Reconciliation of income taxes computed at the US federal statutory rate to income tax expense (benefit) recorded:
		Year Ended December 31,
		2014			2013			2012
	Income (loss) before income taxes and equity in earnings of unconsolidated subsidiaries	$	(858	)	$	(606	)	$	72
	Income taxes at the US federal statutory rate of 35%	(300		)	(212		)	25
	Nondeductible reserve for tax receivable from EFH Corp.	43			38			—
	Nondeductible debt restructuring costs	28			—			—
	Valuation allowance	72			—			—
	Other	2			5			2
	Income tax expense (benefit)	$	(155	)	$	(169	)	$	27
	Effective rate	18.1		%	27.9		%	37.5		%
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	Deferred income taxes provided for temporary differences based on tax laws in effect at December 31, 2014 and 2013 are as follows:
		December 31,
		2014									2013
		Total			Current			Noncurrent			Total		Current		Noncurrent
	Deferred Income Tax Assets:
	Accrued interest	$	—		$	—		$	—		$	3	$	—	$	3
	Net operating loss (NOL) carryforwards	232			—			232			—		—		—
	Debt extinguishment gains (Note 8)	30			—			30			49		—		49
	Other	2			—			2			1		—		1
	Total	264			—			264			53		—		53
	Deferred Income Tax Liabilities:
	Debt extinguishment gains related to pushed down debt of EFH Corp. (Note 8)	80			26			54			103		26		77
	Accrued interest	106			—			106			—		—		—
	Debt fair value discount	6			—			6			—		—		—
	Total	192			26			166			103		26		77
	Valuation Allowance	72			—			72			—		—		—
	Net Accumulated Deferred Income Tax (Asset) Liability	$	—		$	26		$	(26	)	$	50	$	26	$	24

Interest_Expense_and_Related_C1

Interest Expense and Related Charges (Tables)	12 Months Ended
	Dec. 31, 2014
Interest Expense and Related Charges [Abstract]
Schedule of Interest Expense and Related Charges [Table Text Block]
		Year Ended December 31,
		2014			2013			2012
	Interest expense on debtor-in-possession financing	$	125		$	—		$	—
	Interest expense on pre-petition debt	267			630			434
	Interest expense related to pushed down debt	1			6			75
	Interest expense on pre-petition toggle notes payable in additional principal (Note 8)	65			176			12
	Amortization of debt exchange premiums	(24		)	(80		)	(8		)
	Amortization of debt exchange discounts and issuance costs	7			28			13
	Total interest expense and related charges	$	441		$	760		$	526

Reorganization_Items_Tables

Reorganization Items (Tables)	12 Months Ended
	Dec. 31, 2014
Reorganization Items [Abstract]
Reorganization Items [Table Text Block]	Expenses and income directly associated with the Chapter 11 Cases are reported separately in the condensed statements of consolidated income (loss) as reorganization items as required by ASC 852, Reorganizations. Reorganization items also include adjustments to reflect the carrying value of liabilities subject to compromise (LSTC) at their estimated allowed claim amounts, as such adjustments are determined. The following table presents reorganization items incurred since the Petition Date as reported in the statements of consolidated income (loss):
		Post-Petition Period Through
		31-Dec-14
	Loss on exchange and settlement of EFIH First Lien Notes (Note 6)	$	108
	Fees associated with completion of EFIH DIP Facility	94
	Expenses related to legal advisory and representation services	50
	Expenses related to other professional consulting and advisory services	15
	Total reorganization items	$	267

Debt_Tables

Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Schedule of Liabilities Subject to Compromise	The following table presents LSTC as reported in the consolidated balance sheets at December 31, 2014:
		December 31,
		2014
	Notes, loans and other debt per the following table	$	3,843
	Accrued interest on notes, loans and other debt	138
	Advances and other payables to affiliates	7
	Total liabilities subject to compromise	$	3,988
Schedule of Long-term Debt Instruments	Amounts reported below as of December 31, 2014 represent principal amounts of pre-petition notes, loans and other debt reported as liabilities subject to compromise. Amounts reported below as of December 31, 2013 represent notes, loans and other debt reported as current liabilities in EFIH's consolidated balance sheets. All pre-petition notes, loans and other debt outstanding as of December 31, 2014 are classified as LSTC.
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, December 31, 2013 and December 31, 2014, respectively.
			31-Dec-12
	Securities Guaranteed (principal amounts)		Held by EFIH		Subject to Push Down		Not Merger-Related		Total Guaranteed		Debt Cancelled in 2013 (c)		Total Guaranteed December 31, 2013 and 2014 (d)
	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 12.
	(c)	See Note 8 for discussion of debt distributions and cancellations.
	(d)	These amounts are subject to push down.

Membership_Interests_Tables

Membership Interests (Tables)	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Available-for-sale Securities	:
			Principal Amount			Carrying Value
	EFH Corp. 5.55% Fixed Senior Notes Series P due November 15, 2014		$	281		$	185
	EFH Corp. 6.50% Fixed Senior Notes Series Q due November 15, 2024		545			249
	EFH Corp. 6.55% Fixed Senior Notes Series R due November 15, 2034		456			194
	TCEH 10.25% Fixed Senior Notes due November 1, 2015 (both periods include $48 million principal amount of Series B Notes)		79			7
	Balance reported as reduction in membership interests		$	1,361		$	635
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents the changes to accumulated other comprehensive income (loss) for the year ended December 31, 2013.
		Dedesignated Cash Flow Hedges - Oncor			Changes in Fair Values of Investment in Debt Securities of Affiliates			Pension and Other Postretirement Employee Benefit Liabilities Adjustments - Oncor			Total Accumulated Other Comprehensive Income (Loss)
	Balance at December 31, 2012	$	(23	)	$	185		$	(2	)	$	160
	Other comprehensive loss before reclassifications (after tax)	—			—			(16		)	(16		)
	Amounts reclassified from accumulated other comprehensive income (loss) and reported in:
	Interest income	—			(284		)	—			(284		)
	Equity in earnings of unconsolidated subsidiaries	2			—			—			2
	Income tax benefit	—			99			—			99
	Total amount reclassified from accumulated other comprehensive income (loss) during the period	2			(185		)	—			(183		)
	Total change during the period	2			(185		)	(16		)	(199		)
	Balance at December 31, 2013	$	(21	)	$	—		$	(18	)	$	(39	)

Supplementary_Financial_Inform1

Supplementary Financial Information (Tables)	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Schedule of Fair Value of Debt	Fair Value of Debt
			December 31, 2014						31-Dec-13
	Debt:		Carrying Amount			Fair			Carrying Amount		Fair
						Value					Value
	Borrowings under debtor-in-possession credit facilities (Note 6)		$	5,400		$	5,400		$	—	$	—
	Pre-petition notes, loans and other debt reported as liabilities subject to compromise (Note 8)		3,876			4,336			—		—
	Pre-petition notes, loans and other debt (Note 8)		—			—			7,877		7,849
Schedule of Investment Income
		Year Ended December 31,
		2014			2013			2012
	Available-for-sale securities:
	Interest received/accrued	$	—		$	—		$	232
	Accretion of purchase discount	—			—			92
	PIK interest received/accrued related to EFH Corp. Toggle Notes	—			—			288
	Mark-to-market gain reclassified from AOCI	—			284			—
	Impairments related to issuer credit	—			—			(14		)
	Total interest	$	—		$	284		$	598
Schedule of cash flow, supplemental disclosures	Supplemental Cash Flow Information
		Year Ended December 31,
		2014			2013			2012
	Cash payments (receipts) related to:
	Interest paid	$	376		$	619		$	352
	Interest received on investments in debt of affiliates (net of tax) (a)	—			—			(184		)
	Income taxes	—			(5		)	180
	Reorganization items (b)	38			—			—
	Noncash investing and financing activities:
	Receipt of additional EFH Corp. Toggle Notes in lieu of cash interest	—			—			344
	Principal amount of toggle notes issued in lieu of cash interest (Note 8)	—			173			—
	Parent's payment of interest on pushed-down debt accounted for as a contribution of capital (net of tax) (Note 8) (c)	—			23			22
	Reduction of debt pushed down from EFH Corp. (Note 8) (d)	—			(420		)	(282		)
	Debt exchange transactions (e)	(85		)	14			457
	Distribution to EFH Corp. of debt held as an investment (Note 11)	—			(5,778		)	160
	Income tax on interest received on holdings of affiliate debt (Note 11)	—			(88		)	—
	____________
	(a)	Interest received in 2012 reported as an increase in membership interests (See Note 11).
	(b)	Represents cash payments for legal and other professional services reported in reorganization items (See Note 7).
	(c)	Reflects noncash settlement of certain income taxes payable arising as a result of the sale of noncontrolling interests in Oncor.
	(d)	For the year ended December 31, 2013, represents $838 million principal amount of EFH Corp. debt exchanged (at 50%). For the year ended December 31, 2012, represents $564 million principal amount of EFH Corp. debt exchanged (at 50%). See Note 8.
	(e)	For the year ended December 31, 2014, represents $1.836 billion principal amount of loans issued under the EFIH DIP Facility in excess of the $1.673 billion principal amount of EFIH First Lien Notes exchanged and $78 million of related accrued interest. For the year ended December 31, 2013 represents, $1.302 billion of EFIH debt issued in exchange for $1.310 billion of EFH Corp. and EFIH debt and $89 million of EFIH debt issued in exchange for $95 million of EFH Corp. debt. For the year ended December 31, 2012, represents $1.304 billion of EFIH debt issued in exchange for $1.761 billion of EFH Corp. debt. See Note 8.

Business_And_Significant_Accou1

Business And Significant Accounting Policies (Details) (Oncor [Member])	Dec. 31, 2014	Nov. 30, 2008
Oncor [Member]
Business and Significant Accounting Policies
Equity method investment, ownership (as a percent)	80.00%
Sale of equity ownership interest (as a percent)		19.75%

Details

(Details) (Subsequent Event [Member])	Mar. 31, 2015
Subsequent Event [Member]
Restructuring Cost and Reserve [Line Items]
Bankruptcy Claims, Number of Claims under Review by Management	10,000
Bankruptcy Claims, Number of Claims Expunged by Bankruptcy Court	2,450

Investment_In_Oncor_Holdings_O

Investment In Oncor Holdings (Oncor Holdings and Distributions from Oncor Holdings) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2008	Sep. 30, 2008	Apr. 29, 2014
					Cash_commitments
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated subsidiary	$6,050	$5,950
Distributions of earnings from unconsolidated subsidiaries	202	213	147
Oncor [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership (as a percent)	80.00%
Oncor Holdings [Member]
Schedule of Equity Method Investments [Line Items]
Distributions of earnings from unconsolidated subsidiaries	202	213	147
Eligible distributions after accounting for regulatory restrictions	184
Eligible distribution under regulatory matters, directly related to ownership interest	146
Equity Method Investment Goodwill Impairment Charge Removal				860
Number of cash commitments					2
PUCT required regulatory capitalization, ratio of debt to equity, debt (as a percent)	60.00%
PUCT required regulatory capitalization, ratio of debt to equity, equity (as a percent)	40.00%
PUCT required regulatory capitalization ratio of debt to equity, debt (as a percent)	58.80%
PUCT required regulatory capitalization ratio of debt to equity, equity (as a percent)	41.20%
Oncor Holdings [Member] | Refunds to customers [Member]
Schedule of Equity Method Investments [Line Items]
Public Utilities, One-time Cash Commitment Refund Before Tax					72
Public Utilities, One-time Cash Commitment Refund After Tax					46
Public Utilities, Number of customer refunds					1
Oncor Holdings [Member] | Commitment for additional energy efficiency initiatives [Member]
Schedule of Equity Method Investments [Line Items]
Public Utilities, Total Commitment For Additional Energy Efficiency Initiatives, Period to Spend Funds		5 years
Public Utilities, Total Commitment For Additional Energy Efficiency Initiatives		100
Texas Competitive Electric Holdings Company LLC [Member]
Schedule of Equity Method Investments [Line Items]
Accounts Receivable, Related Parties						$109

Investment_In_Oncor_Holdings_O1

Investment In Oncor Holdings (Oncor Holdings Financial Statements) (Details) (Variable Interest Entity, Primary Beneficiary [Member], Oncor Holdings [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Variable Interest Entity, Primary Beneficiary [Member] | Oncor Holdings [Member]
Schedule of Equity Method Investments [Line Items]
Operating revenues	$3,822	$3,552	$3,328
Operation and maintenance expenses	-1,453	-1,269	-1,171
Depreciation and amortization	-851	-814	-771
Taxes other than income taxes	-438	-424	-415
Other income	13	18	26
Other deductions	-15	-15	-64
Interest income	3	4	24
Interest expense and related charges	-353	-371	-374
Income before income taxes	728	681	583
Income tax expense	-289	-259	-243
Net income	439	422	340
Net income attributable to noncontrolling interests	-90	-87	-70
Net income attributable to Oncor Holdings	349	335	270
Current assets:
Cash and cash equivalents	5	28
Restricted cash	56	52
Trade accounts receivable b net	407	385
Trade accounts and other receivables from affiliates	118	135
Income taxes receivable from EFH Corp.	144	16
Inventories	73	65
Accumulated deferred income taxes	10	32
Prepayments and other current assets	91	82
Total current assets	904	795
Restricted cash	16	16
Other investments	97	91
Property, plant and equipment b net	12,463	11,902
Goodwill	4,064	4,064
Regulatory assets b net	1,429	1,324
Other noncurrent assets	67	71
Total assets	19,040	18,263
Current liabilities:
Short-term borrowings	711	745
Long-term debt due currently	639	131
Trade accounts payable b nonaffiliates	202	178
Income taxes payable to EFH Corp.	24	23
Accrued taxes other than income	174	169
Accrued interest	93	95
Other current liabilities	156	135
Total current liabilities	1,999	1,476
Accumulated deferred income taxes	1,978	1,905
Long-term debt, less amounts due currently	4,997	5,381
Other noncurrent liabilities and deferred credits	2,245	1,822
Total liabilities	$11,219	$10,584

Income_Taxes_The_components_of

Income Taxes The components of EFIH's income tax (benefit) expense (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Abstract]
Current Federal Tax Expense (Benefit)	($104)	($115)	$25
Current State and Local Tax Expense (Benefit)	0	1	4
Deferred Federal Income Tax Expense (Benefit)	-52	-55	-2
Deferred State and Local Income Tax Expense (Benefit)	1	0	0
Income tax expense (benefit)	($155)	($169)	$27

Income_Taxes_Reconciliation_of

Income Taxes Reconciliation of income taxes computed at the US federal statutory rate (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Income (loss) before income taxes and equity in earnings of unconsolidated subsidiaries	($858)	($606)	$72
Income taxes at the US federal statutory rate of 35%	-300	-212	25
Federal Statutory Rate	35.00%	35.00%	35.00%
Nondeductible reserve for tax receivable from EFH Corp.	43	38	0
Effective Income Tax Rate Reconciliation, Nondeductible Debt Restructuring Costs	28	0	0
Valuation allowance	72	0	0
Other	2	5	2
Income tax expense (benefit)	($155)	($169)	$27
Effective rate	18.10%	27.90%	37.50%

Income_Taxes_Summary_of_Deferr

Income Taxes Summary of Deferred Income Taxes (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Income Tax Disclosure [Abstract]
Accrued interest	$0	$3
Accrued interest, Current	0	0
Accrued interest, Noncurrent	0	3
Deferred Tax Assets, Operating Loss Carryforwards	232	0
Deferred Tax Assets, Operating Loss Carryforwards, Current	0	0
Deferred Tax Assets, Operating Loss Carryforwards, Noncurrent	232	0
Debt extinguishment gains	30	49
Debt extinguishment gains, Current	0	0
Debt extinguishment gains, Noncurrent	30	49
Deferred Tax Assets, Other	2	1
Deferred Tax Assets, Other, Current	0	0
Deferred Tax Assets, Other, Noncurrent	2	1
Total	264	53
Total, Current	0	0
Total, Noncurrent	264	53
Debt extinguishment gains related to pushed down debt of EFH Corp. (Note 6)	80	103
Debt extinguishment gains related to pushed down debt of EFH Corp., Current	26	26
Debt extinguishment gains related to pushed down debt of EFH Corp., Noncurrent	54	77
Deferred Tax Liability, Accrued Interest	106	0
Deferred Tax Liability, Accrued Interest, Current	0	0
Deferred Tax Liability, Accrued Interest, Noncurrent	106	0
Debt fair value discount	6	0
Debt fair value discount, Current	0	0
Debt fair value discount, Noncurrent	6	0
Total	192	103
Total, Current	26	26
Total, Noncurrent	166	77
Deferred Tax Assets, Valuation Allowance	72	0
Deferred Tax Assets, Valuation Allowance, Current	0	0
Deferred Tax Assets, Valuation Allowance, Noncurrent	72	0
Net Deferred Income Tax Liability	0	50
Deferred Tax Liabilities, Net, Current	26	26
Deferred Tax Assets, Net, Noncurrent	-26
Deferred Tax Liabilities, Net, Noncurrent	$0	$24

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Valuation Allowance	$72	$0
Income Taxes Receivable, Current	125	110
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	663
Internal Revenue Service (IRS) [Member] | Tax Year 2013 [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards		328
EFH Corp. [Member] | Federal and State Income Tax Allocation Agreement [Member]
Operating Loss Carryforwards [Line Items]
Income Taxes Receivable, Current	$125	$110

Other_Deductions_Details

Other Deductions (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Income Tax Disclosure [Abstract]
Income Taxes Receivable, Current	$125	$110
Reserve for Affiliate Receivable	$3

DebtorinPossession_Facility_De

Debtor-in-Possession Facility (Details) (USD $)	8 Months Ended	12 Months Ended			1 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Jan. 31, 2013
Line of Credit Facility [Line Items]
Debtor-in-Possession Financing, Borrowings Outstanding	$5,400,000,000	$5,400,000,000	$0
Debtor Reorganization Items, Gain (Loss) On Exchange And Settlement Of Debt Instruments	108,000,000	108,000,000	0	0
First-Lien Debtor-in-Possession Facility [Member] | Energy Future Intermediate Holding CO LLC [Member]
Line of Credit Facility [Line Items]
Debtor-In-Possession Financing, Extension Fee, Twenty-Fifth Through Thirtieth Month		0.25%
Debtor-In-Possession Financing, Incremental Junior Lien Debt Allowed, Maximum		3,000,000,000
First-Lien Debtor-in-Possession Facility [Member] | Senior Secured Super-Priority First Lien Term Loan [Member] | Energy Future Intermediate Holding CO LLC [Member]
Line of Credit Facility [Line Items]
Debtor In Possession Financing, Liquidity Covenant, Unrestricted Cash Balance, Minimum	150,000,000	150,000,000
Debtor-in-Possession Financing, Borrowings Outstanding	5,400,000,000	5,400,000,000
Debtor-in-Possession Financing, Interest Rate on Borrowings Outstanding	4.25%	4.25%
Debtor-In-Possession Financing, Borrowings Used to Repay Pre-Petition Debt					2,438,000,000
Debtor-in-Possession Financing, Amount Arranged	5,400,000,000	5,400,000,000
Debtor-In-Possession Financing, Borrowings Used In Exchange Transaction For Pre-Petition Debt					1,836,000,000
Debtor-In-Possession Financing, Borrowings Issued And Held As Cash					1,038,000,000
Debtor Reorganization Items, Gain (Loss) On Exchange And Settlement Of Debt Instruments		108,000,000
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum		1.00%
Debt Instrument, Basis Spread on Variable Rate		3.25%
Secured Debt [Member]
Line of Credit Facility [Line Items]
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction						1,310,000,000
Secured Debt [Member] | Fixed Senior Secured First Lien 6.875% Notes and Fixed Senior Secured First Lien 10% Notes [Member] | Energy Future Intermediate Holding CO LLC [Member]
Line of Credit Facility [Line Items]
Principal Amount Of Affiliate Debt Repurchased					2,312,000,000
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction					1,673,000,000
RSA First Lien Note Parties And Qualifying Holders of EFIH First Lien Notes Tendered By Participation Date [Member] | First-Lien Debtor-in-Possession Facility [Member] | Debtor-in-Possession Financing, First Lien Debt Facility Agreement [Member] | Energy Future Intermediate Holding CO LLC [Member]
Line of Credit Facility [Line Items]
Debtor-in-Possession Financing, Debt Settlement, Settlement Price, Percentage of Principal and Percentage of Accrued and Unpaid Interest, Percentage of Accrued and Unpaid Interest					101.00%
Debtor-in-Possession Financing, Debt Settlement, Settlement Price, Percentage of Principal and Percentage of Accrued and Unpaid Interest, Percentage of Principal					105.00%
RSA First Lien Note Parties And Qualifying Holders of EFIH First Lien Notes Tendered By Participation Date [Member] | Secured Debt [Member] | Fixed Senior Secured First Lien 6.875% Notes and Fixed Senior Secured First Lien 10% Notes [Member] | Energy Future Intermediate Holding CO LLC [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Increase, Accrued Interest					78,000,000
Non-Settling Holders Of EFIH First Lien Notes [Member] | Secured Debt [Member] | Fixed Senior Secured First Lien 6.875% Notes and Fixed Senior Secured First Lien 10% Notes [Member] | Energy Future Intermediate Holding CO LLC [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Increase, Accrued Interest					$128,000,000

Interest_Expense_and_Related_C2

Interest Expense and Related Charges (Interest Expense and Related Charges) (Details) (USD $)	8 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Expense and Related Charges [Line Items]
Interest expense on debtor-in-possession financing		$125	$0	$0
Interest expense on pre-petition debt		267	630	434
Interest expense related to pushed down debt		1	6	75
Interest expense on pre-petition toggle notes payable in additional principal		65	176	12
Amortization of debt exchange premiums		-24	-80	-8
Amortization of debt exchange discounts and issuance costs		7	28	13
Total interest expense and related charges	54	441	760	526
Energy Future Intermediate Holding CO LLC [Member]
Interest Expense and Related Charges [Line Items]
Interest Expense On Prepetition Liabilities	363
Amount of Interest Expense On Prepetition Liabilities in Excess of Actual Interest	$309

Reorganization_Items_Details

Reorganization Items (Details) (USD $)	8 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reorganization Items [Abstract]
Loss on exchange and settlement of EFIH First Lien Notes	$108	$108	$0	$0
Fees associated with completion of EFIH DIP Facility	94	94	0	0
Expenses related to legal advisory and representation services	50
Expenses related to other professional consulting and advisory services	15
Total reorganization items	$267	$267	$0	$0

Debt_Debt_Details

Debt (Debt) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Debt Instrument [Line Items]
Total debt	$0		$7,877
Total debt	3,843
Percentage of securities guaranteed by and push down debt	50.00%
Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			7,847
Unamortized premium			284
Unamortized discount			-146
Secured Debt [Member] | 6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			503	[1]
Total debt	0	[1]
Stated interest rate (as a percent)	6.88%
Secured Debt [Member] | 10% Fixed Senior Secured First Lien Notes due December 1, 2020 [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			3,482	[1]
Total debt	0	[1]
Secured Debt [Member] | 11% Senior Secured Second Lien Notes due October 1, 2021 [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			406
Total debt	406
Stated interest rate (as a percent)	11.00%
Secured Debt [Member] | 11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			1,750
Total debt	1,750
Stated interest rate (as a percent)	11.75%
Secured Debt [Member] | 11.25%/12.25% Senior Toggle Notes due December 1, 2018 [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			1,566
Total debt	1,566
Secured Debt [Member] | 9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			2
Total debt	2
Stated interest rate (as a percent)	9.75%
Push Down Debt [Member]
Debt Instrument [Line Items]
Total debt			30	[2]
Total debt	30	[2]
Push Down Debt [Member] | 9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member]
Debt Instrument [Line Items]
Stated interest rate (as a percent)	9.75%
Push Down Debt [Member] | 10% EFH Corp. Fixed Senior Secured Notes due January 15, 2020 [Member]
Debt Instrument [Line Items]
Effective interest rate (as a percent)	10.00%
Push Down Debt [Member] | 10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			17	[2]
Total debt	17	[2]
Stated interest rate (as a percent)	10.88%
Push Down Debt [Member] | 11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			13	[2]
Total debt	13	[2]
Deferred Debt Issuance And Extension Costs [Member]
Debt Instrument [Line Items]
Total debt	-33	[3]
Minimum [Member] | Push Down Debt [Member] | 11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member]
Debt Instrument [Line Items]
Effective interest rate (as a percent)	11.25%
Maximum [Member] | Push Down Debt [Member] | 11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member]
Debt Instrument [Line Items]
Effective interest rate (as a percent)	12.00%
Energy Future Intermediate Holding CO LLC [Member]
Debt Instrument [Line Items]
Total debt	3,846
Energy Future Intermediate Holding CO LLC [Member] | Unamortized Discount [Member]
Debt Instrument [Line Items]
Total debt	-121
Energy Future Intermediate Holding CO LLC [Member] | Unamortized Premium [Member]
Debt Instrument [Line Items]
Total debt	243
Energy Future Intermediate Holding CO LLC [Member] | Minimum [Member] | Senior Notes [Member] | 11.25%/12.25% Senior Toggle Notes due December 1, 2018 [Member]
Debt Instrument [Line Items]
Effective interest rate (as a percent)	11.25%
Energy Future Intermediate Holding CO LLC [Member] | Maximum [Member] | Senior Notes [Member] | 11.25%/12.25% Senior Toggle Notes due December 1, 2018 [Member]
Debt Instrument [Line Items]
Effective interest rate (as a percent)	12.25%
Reported Value Measurement [Member]
Debt Instrument [Line Items]
Deferred debt issuance costs			$0
[1]	(a)The EFIH First Lien Notes were exchanged or settled in June 2014 (see Note 6).
[2]	(b)Represents 50% of the amount of these EFH Corp. securities guaranteed by EFIH and pushed down per the discussion below under "Guarantees and Push Down of EFH Corp. Debt."
[3]	(c)Deferred debt issuance costs were reported in other noncurrent assets at DecemberB 31, 2013.

Debt_Debt_Related_Activity_Det

Debt (Debt Related Activity) (Details) (USD $)

1 Months Ended

12 Months Ended

3 Months Ended

1 Months Ended

In Millions, unless otherwise specified

Jan. 31, 2013

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Mar. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Oct. 31, 2012

Feb. 29, 2012

Mar. 31, 2015

Debt Instrument [Line Items]

Liabilities Subject To Compromise, Debt

$3,843

Long Term Debt And Capital Leases Issued, Principal Amount

1,564

Debt Instrument Principal Amount Of Subsidiaries Still Held By Affiliate

1,361

Deferred tax assets, deferred income gain relating to membership interests transactions

21

Cash Dividends Paid to Parent Company

680

Parent's payment of interest on pushed-down debt accounted for as a contribution of capital (net of tax) (Note 6) (a)

0

23

53

Secured Debt [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

1,310

Debt Instrument, Unamortized Premium

284

Debt Instrument, Unamortized Discount

146

Senior Notes [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

160

Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled

1,235

Push Down Debt [Member]

Debt Instrument [Line Items]

Liabilities Subject To Compromise, Debt

30

[1]

Debt and Capital Lease Obligations

30

Push Down Debt [Member] | Energy Future Holdings Corp. [Member]

Debt Instrument [Line Items]

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

50.00%

50.00%

Energy Future Holdings Corp. [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

95

10% Fixed Senior Secured First Lien Notes due December 1, 2020 [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

1,058

Energy Future Intermediate Holding CO LLC [Member]

Debt Instrument [Line Items]

Liabilities Subject To Compromise, Debt

3,846

Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member] | Related Party Transactions, Returned Debt as Dividend [Member]

Debt Instrument [Line Items]

Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled

6,360

158

Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

1,761

Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries

60

Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member] | Financial Guarantee [Member]

Debt Instrument [Line Items]

Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries

60

[2]

6,426

6,426

6,426

Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member] | Financial Guarantee [Member] | Subject to Push Down [Member]

Debt Instrument [Line Items]

Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries

900

900

900

Series B [Member] | TCEH Corp. [Member]

Debt Instrument [Line Items]

Notes Payable, Current

48

48

10% Senior Secured Notes Due 2020 [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled

1,058

11.25%/12.25% Senior Toggle Notes due December 1, 2018 [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Liabilities Subject To Compromise, Debt

1,566

11.25%/12.25% Senior Toggle Notes due December 1, 2018 [Member] | Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Long Term Debt And Capital Leases Issued, Principal Amount

1,304

9.75 Senior Secured Notes Due 2019 [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

139

9.75 Senior Secured Notes Due 2019 [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled

113

9.75 Senior Secured Notes Due 2019 [Member] | Energy Future Holdings Corp. [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

113

6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Liabilities Subject To Compromise, Debt

0

[3]

Pledged Ownership Membership Interest Percentage

100.00%

6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 [Member] | Secured Debt [Member] | Oncor Holdings [Member]

Debt Instrument [Line Items]

Pledged Ownership Membership Interest Percentage

100.00%

6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 [Member] | Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Long Term Debt And Capital Leases Issued, Principal Amount

253

10.875% Senior Notes due 2017 [Member] | Energy Future Holdings Corp. [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

31

11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Push Down Debt [Member]

Debt Instrument [Line Items]

Liabilities Subject To Compromise, Debt

13

[1]

11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Energy Future Holdings Corp. [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

33

11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member] | Financial Guarantee [Member]

Debt Instrument [Line Items]

Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries

27

[2]

3,501

3,501

3,501

11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member] | Financial Guarantee [Member] | Subject to Push Down [Member]

Debt Instrument [Line Items]

Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries

27

60

60

60

Fixed Series P 5.55% Senior Notes due November 15, 2014 [Member] | Energy Future Holdings Corp. [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

2

Fixed Series Q 6.50% Senior Notes due November 15, 2024 [Member] | Energy Future Holdings Corp. [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

29

Toggle Notes [Member]

Debt Instrument [Line Items]

Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled

3,474

119

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

Debt Instrument [Line Items]

Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled

1,715

10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Push Down Debt [Member]

Debt Instrument [Line Items]

Liabilities Subject To Compromise, Debt

17

[1]

10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member]

Debt Instrument [Line Items]

Principal Amount Of Affiliate Debt Acquired In Exchange Transaction

39

10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member] | Financial Guarantee [Member]

Debt Instrument [Line Items]

Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled

1,715

[4]

Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries

33

[2]

1,749

1,749

1,749

10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member] | Financial Guarantee [Member] | Subject to Push Down [Member]

Debt Instrument [Line Items]

Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries

33

64

64

64

11% Senior Secured Second Lien Notes due October 1, 2021 [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Liabilities Subject To Compromise, Debt

406

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

Debt Instrument [Line Items]

Long Term Debt And Capital Leases Issued, Principal Amount

89

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

Debt Instrument [Line Items]

Long Term Debt Issued, Principal Amount, PIK Interest Election

173

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

Debt Instrument [Line Items]

Liabilities Subject To Compromise, Debt

1,750

11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member] | Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Cash Dividends Paid to Parent Company

950

Subsequent Event [Member] | Fixed Senior Secured Second Lien 11% Notes and Fixed Senior Secured Second Lien 11.75% Notes [Member] [Member] | Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Repayments of Long-term Debt

735

Debt Repurchase Fees And Expenses

15

Percent Of Lenders Consenting To Debt Repurchase Transaction

97.00%

Consent Fee Related To Debt Repurchase Transaction

13

Subsequent Event [Member] | 11% Senior Secured Second Lien Notes due October 1, 2021 [Member] | Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Liabilities Subject To Compromise, Debt

322

Subsequent Event [Member] | 11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member] | Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member]

Debt Instrument [Line Items]

Liabilities Subject To Compromise, Debt

$1,388

[1]

(b)Represents 50% of the amount of these EFH Corp. securities guaranteed by EFIH and pushed down per the discussion below under "Guarantees and Push Down of EFH Corp. Debt."

[2]

These amounts are subject to push down.

[3]

(a)The EFIH First Lien Notes were exchanged or settled in June 2014 (see Note 6).

[4]

(c)See Note 8 for discussion of debt distributions and cancellations.

Debt_Guarantees_and_Push_Down_

Debt (Guarantees and Push Down of EFH Corp. Debt) (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2013		Dec. 31, 2014		Dec. 31, 2012
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt				$3,843
Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled	1,235
Push Down Debt [Member]
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt				30	[1]
9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member] | Push Down Debt [Member]
Debt Instrument [Line Items]
Stated interest rate (as a percent)				9.75%
10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled	1,715
10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Push Down Debt [Member]
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt				17	[1]
Debt Instrument [Line Items]
Stated interest rate (as a percent)				10.88%
11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Push Down Debt [Member]
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt				13	[1]
10% EFH Corp. Fixed Senior Secured Notes due January 15, 2020 [Member] | Push Down Debt [Member]
Debt Instrument [Line Items]
Effective interest rate (as a percent)				10.00%
Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries				60
Energy Future Intermediate Holding CO LLC [Member] | Financial Guarantee [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries				60	[2]	6,426
Energy Future Intermediate Holding CO LLC [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Held By Energy Future Intermediate Holding CO LLC [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						5,126
Energy Future Intermediate Holding CO LLC [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Subject to Push Down [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						900
Energy Future Intermediate Holding CO LLC [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Not Merger-Related [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						400
Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled		6,360	[3]
Energy Future Intermediate Holding CO LLC [Member] | Financial Guarantee [Member] | Senior Notes And Demand Notes Payable [Member]
Debt Instrument [Line Items]
Total		7,124		60	[2]
Energy Future Intermediate Holding CO LLC [Member] | 9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member] | Financial Guarantee [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries				0	[2],[4]	115	[4]
Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled		113	[3],[4]
Energy Future Intermediate Holding CO LLC [Member] | 9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Held By Energy Future Intermediate Holding CO LLC [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						0	[4]
Energy Future Intermediate Holding CO LLC [Member] | 9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Subject to Push Down [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						115	[4]
Energy Future Intermediate Holding CO LLC [Member] | 9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Not Merger-Related [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						0	[4]
Energy Future Intermediate Holding CO LLC [Member] | 10% Fixed Senior Secured First Lien Notes due December 1, 2020 [Member] | Financial Guarantee [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries				0	[2],[4]	1,061	[4]
Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled		1,058	[3],[4]
Energy Future Intermediate Holding CO LLC [Member] | 10% Fixed Senior Secured First Lien Notes due December 1, 2020 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Held By Energy Future Intermediate Holding CO LLC [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						0	[4]
Energy Future Intermediate Holding CO LLC [Member] | 10% Fixed Senior Secured First Lien Notes due December 1, 2020 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Subject to Push Down [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						661	[4]
Energy Future Intermediate Holding CO LLC [Member] | 10% Fixed Senior Secured First Lien Notes due December 1, 2020 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Not Merger-Related [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						400	[4]
Energy Future Intermediate Holding CO LLC [Member] | 10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate (as a percent)						10.88%
Energy Future Intermediate Holding CO LLC [Member] | 10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Financial Guarantee [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries				33	[2]	1,749
Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled		1,715	[3]
Energy Future Intermediate Holding CO LLC [Member] | 10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Held By Energy Future Intermediate Holding CO LLC [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						1,685
Energy Future Intermediate Holding CO LLC [Member] | 10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Subject to Push Down [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries				33		64
Energy Future Intermediate Holding CO LLC [Member] | 10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Not Merger-Related [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						0
Energy Future Intermediate Holding CO LLC [Member] | 11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Financial Guarantee [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries				27	[2]	3,501
Energy Future Intermediate Holding CO LLC [Member] | 11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Held By Energy Future Intermediate Holding CO LLC [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries						3,441
Energy Future Intermediate Holding CO LLC [Member] | 11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Subject to Push Down [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries				27		60
Energy Future Intermediate Holding CO LLC [Member] | 11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Financial Guarantee [Member] | Senior Notes [Member] | Not Merger-Related [Member]
Debt Instrument [Line Items]
Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled		3,474	[3]
Energy Future Intermediate Holding CO LLC [Member] | TCEH Demand Notes (Note 6) [Member] | Financial Guarantee [Member] | Demand Notes Payable [Member]
Debt Instrument [Line Items]
Intercompany payables		$698	[5]	$0	[2],[5]
[1]	(b)Represents 50% of the amount of these EFH Corp. securities guaranteed by EFIH and pushed down per the discussion below under "Guarantees and Push Down of EFH Corp. Debt."
[2]	These amounts are subject to push down.
[3]	(c)See Note 8 for discussion of debt distributions and cancellations.
[4]	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.
[5]	The TCEH Demand Notes were settled in January 2013. See Note 12.

Debt_Issuances_of_EFIH_6875_Se

Debt (Issuances of EFIH 6.875% Senior Secured Notes) (Details) (Secured Debt [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Long-term Debt, Current Maturities		$7,847
6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities		$503	[1]
Pledged Ownership Membership Interest Percentage	100.00%
Energy Future Intermediate Holding CO LLC [Member] | 6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Registration Default, if not filed and declared effective after original issue date, variable interest rate increase for first ninety days	0.25%
Debt Instrument, Registration Default, if not filed and declared effective after original issue date, total variable interest rate increase after first ninety day period	0.25%
Debt Instrument Registration Default If Not Fled And Declared Effective After Original Issue Date, Total Interest Rate Percentage For First Ninety Days	7.13%
Debt Instrument Registration Default If Not Registered Within One Year Of Original Issue Date, Total Interest Rate Percentage After First Ninety Days	7.38%
[1]	(a)The EFIH First Lien Notes were exchanged or settled in June 2014 (see Note 6).

Debt_EFIH_10_Senior_Secured_De

Debt (EFIH 10% Senior Secured Debt) (Details) (USD $)	12 Months Ended		1 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013		Jan. 31, 2013	Dec. 31, 2014
Debt Instrument [Line Items]
Long Term Debt And Capital Leases Issued, Principal Amount	$1,564
Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	7,847
Secured Debt [Member] | 10% Fixed Senior Secured First Lien Notes due December 1, 2020 [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	3,482	[1]
Long Term Debt And Capital Leases Issued, Principal Amount			1,302
Secured Debt [Member] | 11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities	$1,750
Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member] | 10% Fixed Senior Secured First Lien Notes due December 1, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Registration Default, if not filed and declared effective after original issue date, variable interest rate increase for first ninety days				0.25%
Debt Instrument, Registration Default, if not filed and declared effective after original issue date, total variable interest rate increase after first ninety day period				0.25%
Debt Instrument Registration Default If Not Fled And Declared Effective After Original Issue Date, Total Interest Rate Percentage For First Ninety Days				10.25%
Debt Instrument Registration Default If Not Registered Within One Year Of Original Issue Date, Total Interest Rate Percentage After First Ninety Days				10.50%
Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member] | 11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Registration Default, if not filed and declared effective after original issue date, variable interest rate increase for first ninety days				0.25%
Debt Instrument Registration Default If Not Fled And Declared Effective After Original Issue Date, Total Interest Rate Percentage For First Ninety Days				12.00%
Debt Instrument Registration Default If Not Registered Within One Year Of Original Issue Date, Total Interest Rate Percentage After First Ninety Days				12.50%
Debt instrument registration default if not filed and declared effective after original issue date, incremental variable interest rate increase after first ninety day period				0.25%
[1]	(a)The EFIH First Lien Notes were exchanged or settled in June 2014 (see Note 6).

Debt_EFIH_11_Senior_Secured_Se

Debt (EFIH 11% Senior Secured Second Lien Notes) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt	$3,843
Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities		7,847
Secured Debt [Member] | 11% Senior Secured Second Lien Notes due October 1, 2021 [Member]
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt	406
Debt Instrument [Line Items]
Long-term Debt, Current Maturities		$406

Debt_Issuance_of_EFIH_1175_Sen

Debt (Issuance of EFIH 11.75% Senior Secured Second Lien Notes and Toggle Notes) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt	3,843
Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			7,847
Secured Debt [Member] | 6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 [Member]
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt	0	[1]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			503	[1]
Secured Debt [Member] | 10% Fixed Senior Secured First Lien Notes due December 1, 2020 [Member]
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt	0	[1]
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			3,482	[1]
Secured Debt [Member] | 11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member]
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt	1,750
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			1,750
Secured Debt [Member] | 11.25%/12.25% Senior Toggle Notes due December 1, 2018 [Member]
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt	1,566
Debt Instrument [Line Items]
Long-term Debt, Current Maturities			1,566
Until June 1, 2016 [Member] | Senior Notes [Member] | 11.25%/12.25% Senior Toggle Notes due December 1, 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Options to Pay Interest, Percentage Allowed in Cash	50.00%
Debt Instrument, Options to Pay Interest, Percentage Allowed in PIK Interest	50.00%
Energy Future Intermediate Holding CO LLC [Member]
Debt Disclosure [Abstract]
Liabilities Subject To Compromise, Debt	3,846
Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member] | 6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Registration Default, if not filed and declared effective after original issue date, variable interest rate increase for first ninety days	0.25%
Debt Instrument, Registration Default, if not filed and declared effective after original issue date, total variable interest rate increase after first ninety day period	0.25%
Debt Instrument Registration Default If Not Fled And Declared Effective After Original Issue Date, Total Interest Rate Percentage For First Ninety Days	7.13%
Debt Instrument Registration Default If Not Registered Within One Year Of Original Issue Date, Total Interest Rate Percentage After First Ninety Days	7.38%
Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member] | 10% Fixed Senior Secured First Lien Notes due December 1, 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Registration Default, if not filed and declared effective after original issue date, variable interest rate increase for first ninety days	0.25%
Debt Instrument, Registration Default, if not filed and declared effective after original issue date, total variable interest rate increase after first ninety day period	0.25%
Debt Instrument Registration Default If Not Fled And Declared Effective After Original Issue Date, Total Interest Rate Percentage For First Ninety Days	10.25%
Debt Instrument Registration Default If Not Registered Within One Year Of Original Issue Date, Total Interest Rate Percentage After First Ninety Days	10.50%
Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member] | 11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Registration Default, if not filed and declared effective after original issue date, variable interest rate increase for first ninety days	0.25%
Debt instrument registration default if not filed and declared effective after original issue date, incremental variable interest rate increase after first ninety day period	0.25%
Debt Instrument Registration Default If Not Fled And Declared Effective After Original Issue Date, Total Interest Rate Percentage For First Ninety Days	12.00%
Debt Instrument Registration Default If Not Registered Within One Year Of Original Issue Date, Total Interest Rate Percentage After First Ninety Days	12.50%
Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member] | 11.25%/12.25% Senior Toggle Notes due December 1, 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Registration Default, if not filed and declared effective after original issue date, variable interest rate increase for first ninety days	0.25%
Debt instrument registration default if not filed and declared effective after original issue date, incremental variable interest rate increase after first ninety day period	0.25%
Debt Instrument Registration Default If Not Fled And Declared Effective After Original Issue Date, Total Interest Rate Percentage For First Ninety Days	11.50%
Debt Instrument Registration Default If Not Registered Within One Year Of Original Issue Date, Total Interest Rate Percentage After First Ninety Days	11.75%
[1]	(a)The EFIH First Lien Notes were exchanged or settled in June 2014 (see Note 6).

Debt_Schedule_of_Liabilities_S

Debt (Schedule of Liabilities Subject to Compromise) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Debt Instrument [Line Items]
Liabilities Subject To Compromise, Debt	$3,843
Liabilities Subject To Compromise, Accrued Interest	138
Liabilities Subject To Compromise, Advances And Other Payables To Affiliates	7
Liabilities Subject to Compromise	$3,988	$0

Commitments_And_Contingencies_

Commitments And Contingencies (Narrative) (Details) (Pending Litigation [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Relief Sought Under First Lien Notes [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	$432
Relief Sought Under Second Lien Notes [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	591
EFIH PIK Notes Makewhole Claim [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	$100

Membership_Interests_Narrative

Membership Interests (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended				3 Months Ended	1 Months Ended
In Millions, unless otherwise specified	Jan. 31, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2012	Feb. 29, 2012
Distribution Restrictions [Line Items]
Cash Dividends Paid to Parent Company	$680
Debt Instrument, Principal Amounts Cancelled	1,235					5,125
Interest received on holdings of affiliate debt			0	-252		0
Debt Instrument Principal Amount Of Subsidiaries Still Held By Affiliate		1,361
Mark-to-market gain reclassified from AOCI		284
Texas Competitive Holdings Company LLC and Energy Future Holdings [Member]
Distribution Restrictions [Line Items]
Interest Income, Related Party				252
Texas Competitive Electric Holdings Company LLC [Member] | Interest Income [Member]
Distribution Restrictions [Line Items]
Other than Temporary Impairment Losses, Investments						14
Capital Accounts [Member]
Distribution Restrictions [Line Items]
Interest received on holdings of affiliate debt				252	[1]
Secured Debt [Member]
Distribution Restrictions [Line Items]
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction	1,310
Senior Notes [Member]
Distribution Restrictions [Line Items]
Debt Instrument, Fair Value Disclosure		5,778
Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled		1,235
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction							160
Senior Notes [Member] | Related Party Transactions, Returned Debt as Dividend [Member]
Distribution Restrictions [Line Items]
Debt Instrument, Principal Amounts Cancelled		6,360
10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member]
Distribution Restrictions [Line Items]
Debt Instrument, Principal Amounts Cancelled		1,715
11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member]
Distribution Restrictions [Line Items]
Debt Instrument, Principal Amounts Cancelled		3,474
10% Senior Secured Notes Due 2020 [Member]
Distribution Restrictions [Line Items]
Debt Instrument, Principal Amounts Cancelled		1,058
9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member]
Distribution Restrictions [Line Items]
Debt Instrument, Principal Amounts Cancelled		113
Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member] | Related Party Transactions, Returned Debt as Dividend [Member]
Distribution Restrictions [Line Items]
Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled		6,360					158
Parent Company [Member]
Distribution Restrictions [Line Items]
Equity Method Investment, Ownership Percentage			80.03%
Parent Company [Member] | Senior Notes [Member]
Distribution Restrictions [Line Items]
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction								1,761
Oncor [Member] | Management and Board of Directors [Member]
Distribution Restrictions [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			0.22%
Texas Transmission [Member]
Distribution Restrictions [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners			19.75%
Energy Future Holdings Corp. [Member] | Secured Debt [Member]
Distribution Restrictions [Line Items]
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction	95
Energy Future Holdings Corp. [Member] | Senior Notes [Member] | Related Party Transactions, Returned Debt as Dividend [Member]
Distribution Restrictions [Line Items]
Debt Instrument, Principal Amounts Cancelled	1,266
11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member] | Secured Debt [Member]
Distribution Restrictions [Line Items]
Stated interest rate (as a percent)			11.75%
11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member] | Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member]
Distribution Restrictions [Line Items]
Cash Dividends Paid to Parent Company									950
Toggle Notes [Member]
Distribution Restrictions [Line Items]
Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled		3,474					119
10% EFH Corp. Fixed Senior Secured Notes due January 15, 2020 [Member] | Push Down Debt [Member]
Distribution Restrictions [Line Items]
Effective interest rate (as a percent)			10.00%
9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member] | Secured Debt [Member]
Distribution Restrictions [Line Items]
Stated interest rate (as a percent)			9.75%
9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member] | Push Down Debt [Member]
Distribution Restrictions [Line Items]
Stated interest rate (as a percent)			9.75%
10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member]
Distribution Restrictions [Line Items]
Debt Instrument, Principal Amounts Returned as Dividend to Parent and Cancelled		1,715
10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Push Down Debt [Member]
Distribution Restrictions [Line Items]
Stated interest rate (as a percent)			10.88%
10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Parent Company [Member] | Senior Notes [Member]
Distribution Restrictions [Line Items]
Stated interest rate (as a percent)						10.88%	10.88%	10.88%
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction							$39
[1]	Includes $244 million related to EFH Corp. debt held and $8 million related to TCEH debt held. Income tax effect of $88 million on cash interest received reported as a capital transaction.

Membership_Interests_Principal

Membership Interests (Principal Amounts, Coupon Rates, Maturities and Carrying Value) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Stockholders' Equity [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	($2,203)	($1,822)
Long-Term Debt of Affiliate Held by EFIH [Member]
Stockholders' Equity [Line Items]
Available-for-Sale Securities, Debt Securities, Principal Amount Outstanding	1,361	1,361
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	635	635
Fixed 10.25% Senior Notes due November 1, 2015, Series B [Member] | Senior Notes [Member]
Stockholders' Equity [Line Items]
Stated interest rate (as a percent)	10.25%
Fixed Series R 6.55% Senior Notes due November 15, 2034 [Member]
Stockholders' Equity [Line Items]
Available-for-Sale Securities, Debt Securities, Principal Amount Outstanding	456	456
Available-for-sale Securities, Fair Value Disclosure	194	194
Fixed Series R 6.55% Senior Notes due November 15, 2034 [Member] | Senior Notes [Member]
Stockholders' Equity [Line Items]
Stated interest rate (as a percent)	6.55%
Fixed Series Q 6.50% Senior Notes due November 15, 2024 [Member]
Stockholders' Equity [Line Items]
Available-for-Sale Securities, Debt Securities, Principal Amount Outstanding	545	545
Available-for-sale Securities, Fair Value Disclosure	249	249
Fixed Series Q 6.50% Senior Notes due November 15, 2024 [Member] | Senior Notes [Member]
Stockholders' Equity [Line Items]
Stated interest rate (as a percent)	6.50%
Fixed Series P 5.55% Senior Notes due November 15, 2014 [Member]
Stockholders' Equity [Line Items]
Available-for-Sale Securities, Debt Securities, Principal Amount Outstanding	281	281
Available-for-sale Securities, Fair Value Disclosure	185	185
Fixed Series P 5.55% Senior Notes due November 15, 2014 [Member] | Senior Notes [Member]
Stockholders' Equity [Line Items]
Stated interest rate (as a percent)	5.55%
10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Push Down Debt [Member]
Stockholders' Equity [Line Items]
Stated interest rate (as a percent)	10.88%
Fixed 10.25% Senior Notes due November 1, 2015 [Member]
Stockholders' Equity [Line Items]
Available-for-Sale Securities, Debt Securities, Principal Amount Outstanding	79	79
Available-for-sale Securities, Fair Value Disclosure	7	7
Minimum [Member] | 11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Push Down Debt [Member]
Stockholders' Equity [Line Items]
Effective interest rate (as a percent)	11.25%
Maximum [Member] | 11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Push Down Debt [Member]
Stockholders' Equity [Line Items]
Effective interest rate (as a percent)	12.00%
TCEH Corp. [Member] | Series B [Member]
Stockholders' Equity [Line Items]
Principal amount	$48	$48

Membership_Interests_Membershi

Membership Interests (Membership Interests) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Amounts reclassified from accumulated other comprehensive income (loss) and reported in:
Balance at December 31, 2013	($39)
Equity in earnings of unconsolidated subsidiaries	349	335	270
Income tax benefit	155	169	-27
Total amount reclassified from accumulated other comprehensive income (loss) during the period	-47	-199	147
Balance at December 31, 2014	-86	-39
Reclassification out of Accumulated Other Comprehensive Income [Member]
Amounts reclassified from accumulated other comprehensive income (loss) and reported in:
Balance at December 31, 2013	-39	160
Other comprehensive loss before reclassifications (after tax)	-49	-16
Interest income		-284
Equity in earnings of unconsolidated subsidiaries	2	2
Income tax benefit		99
Total amount reclassified from accumulated other comprehensive income (loss) during the period	2	-183
Total change during the period	-47	-199
Balance at December 31, 2014	-86	-39
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Amounts reclassified from accumulated other comprehensive income (loss) and reported in:
Balance at December 31, 2013	-21	-23
Other comprehensive loss before reclassifications (after tax)	0	0
Interest income		0
Equity in earnings of unconsolidated subsidiaries	2	2
Income tax benefit		0
Total amount reclassified from accumulated other comprehensive income (loss) during the period	2	2
Total change during the period	2	2
Balance at December 31, 2014	-19	-21
Reclassification out of Accumulated Other Comprehensive Income [Member] | Changes in Fair Values of Investment in Debt Securities of Affiliates [Member]
Amounts reclassified from accumulated other comprehensive income (loss) and reported in:
Balance at December 31, 2013	0	185
Other comprehensive loss before reclassifications (after tax)	0	0
Interest income		-284
Equity in earnings of unconsolidated subsidiaries	0	0
Income tax benefit		99
Total amount reclassified from accumulated other comprehensive income (loss) during the period	0	-185
Total change during the period	0	-185
Balance at December 31, 2014	0	0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment [Member]
Amounts reclassified from accumulated other comprehensive income (loss) and reported in:
Balance at December 31, 2013	-18	-2
Other comprehensive loss before reclassifications (after tax)	-49	-16
Interest income		0
Equity in earnings of unconsolidated subsidiaries	0	0
Income tax benefit		0
Total amount reclassified from accumulated other comprehensive income (loss) during the period	0	0
Total change during the period	-49	-16
Balance at December 31, 2014	($67)	($18)

RelatedParty_Transactions_Narr

Related-Party Transactions (Narrative) (Details) (USD $)	1 Months Ended	12 Months Ended	1 Months Ended				12 Months Ended
In Millions, unless otherwise specified	Aug. 31, 2012	Dec. 31, 2013	Jul. 31, 2014	Jan. 31, 2013	Feb. 29, 2012	Oct. 31, 2012	Dec. 31, 2014	Dec. 31, 2012	Mar. 31, 2014
	Agreement_settled
Related Party Transaction [Line Items]
Deferred Tax Assets, Valuation Allowance		$110					$125
Long Term Debt And Capital Leases Issued, Principal Amount		1,564
Number of Agreements Related to Securitization (Transition) Bonds Settled	2
Oncor [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage							80.00%
Secured Debt [Member] | 9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member]
Related Party Transaction [Line Items]
Stated interest rate (as a percent)							9.75%
Secured Debt [Member] | 11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member]
Related Party Transaction [Line Items]
Stated interest rate (as a percent)							11.75%
Secured Debt [Member] | 6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 [Member]
Related Party Transaction [Line Items]
Stated interest rate (as a percent)							6.88%
Push Down Debt [Member] | 9.75% Fixed Senior Secured First Lien Notes due October 15, 2019 [Member]
Related Party Transaction [Line Items]
Stated interest rate (as a percent)							9.75%
Push Down Debt [Member] | 10% EFH Corp. Fixed Senior Secured Notes due January 15, 2020 [Member]
Related Party Transaction [Line Items]
Effective interest rate (as a percent)							10.00%
Push Down Debt [Member] | 10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member]
Related Party Transaction [Line Items]
Stated interest rate (as a percent)							10.88%
Energy Future Holdings Corp. [Member] | Other Postretirement Benefit Plan [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Reimbursement Due to Parent			1
Energy Future Holdings Corp. [Member] | Receivable attributable to income taxes [Member]
Related Party Transaction [Line Items]
Due from Affiliate, Current		18
Energy Future Holdings Corp. [Member] | Payable Attributable To Income Taxes [Member] | State and Local Jurisdiction [Member]
Related Party Transaction [Line Items]
Due to Affiliate, Current		23					24
Goldman, Sachs & Co. [Member]
Related Party Transaction [Line Items]
Debt Issuance Cost				2
Goldman, Sachs & Co. [Member] | Secured Debt [Member] | 11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member]
Related Party Transaction [Line Items]
Debt Issuance Cost	3				7
Affiliates of KKR and TPG Management, L.P. [Member] | Secured Debt [Member] | 11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction						4
Oncor [Member]
Related Party Transaction [Line Items]
Related Party Tax Expense, Due to Affiliates, Current		90					237	3
Oncor [Member] | Internal Revenue Service (IRS) [Member] | Audit Years 1997 Through 2002 [Member]
Related Party Transaction [Line Items]
Related Party Tax Expense, Due from Affiliates, Current							33
Oncor Holdings [Member]
Related Party Transaction [Line Items]
Related Party Tax Expense, Due to Affiliates, Current		34					24	35
Oncor Holdings [Member] | Federal Tax Refund [Member]
Related Party Transaction [Line Items]
Related Party Tax Expense, Due to Affiliates, Current								21
Oncor [Member] | Texas Competitive Electric Holdings Company LLC [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction		967					971	962
Due from Affiliates		135					118
Related Party, Remaining Interest To Be Paid	53
Interest Expense, Related Party								16
Public Utilities, Delivery Fee Surcharge Remitted To Related Party		16					17	16
Related Party, Event of Credit Rating Downgrade, Letter of Credit Required to be Posted to Secure Payment Obligations							170
Related Party, Event of Credit Rating Downgrade, Minimum Number of Rating Agencies Downgrade Below Investment Grade							2
Oncor [Member] | Texas Competitive Electric Holdings Company LLC [Member] | Related Party Transactions, Agreement Between Parties to Settle Obligations Under The Note [Member] | Noninterest bearing note payable maturing in 2016 [Member]
Related Party Transaction [Line Items]
Repayments of Related Party Debt								20
Oncor [Member] | Texas Competitive Electric Holdings Company LLC [Member] | Collateral posted [Member]
Related Party Transaction [Line Items]
Related Party, Letter of Credit Posted as Collateral		9					9
Oncor [Member] | Energy Future Holdings Corp. [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party		32					34	35
Oncor [Member] | Energy Future Holdings Corp. [Member] | Texas Comptroller Of Public Accounts [Member] | Audit Years 1997 Through 2001 [Member]
Related Party Transaction [Line Items]
Related Party Tax Expense, Due to Affiliates, Current							10
Oncor [Member] | Energy Future Holdings Corp. [Member] | Receivable attributable to income taxes [Member]
Related Party Transaction [Line Items]
Due from Affiliate, Current							144
Due from Affiliate, Noncurrent							64
Oncor [Member] | Energy Future Holdings Corp. [Member] | Payable Attributable To Income Taxes [Member]
Related Party Transaction [Line Items]
Due to Affiliate, Current		5
Energy Future Intermediate Holding CO LLC [Member] | Secured Debt [Member] | 6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 [Member]
Related Party Transaction [Line Items]
Long Term Debt And Capital Leases Issued, Principal Amount						253
Energy Future Intermediate Holding CO LLC [Member] | Energy Future Holdings Corp. [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party		0					4	0
Energy Future Intermediate Holding CO LLC [Member] | Energy Future Holdings Corp. [Member] | Sponsor Fees Allocated [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses From Transactions With Related Party, Allocated To Subsidiary		0					3	0
Energy Future Intermediate Holding CO LLC [Member] | Energy Future Holdings Corp. [Member] | Legal And Consulting Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Selling, General and Administrative Expenses From Transactions With Related Party, Allocated To Subsidiary		12					4	0
Energy Future Intermediate Holding CO LLC [Member] | Oncor [Member] | Related Party Transactions, Agreement Between Parties To Settle Future Reimbursements [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Decrease in Member Interest, After Tax								2
Related Party Transaction, Decrease in Investment in Unconsolidated Subsidiary, Offsetting Decrease in Equity								1
Energy Future Intermediate Holding CO LLC [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage							80.03%
Energy Future Intermediate Holding CO LLC [Member] | Texas Competitive Electric Holdings Company LLC [Member] | Related Party Transactions, Agreement Between Parties To Settle Future Reimbursements [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	159
Energy Future Intermediate Holding CO LLC [Member] | Energy Future Holdings Corp. [Member] | Income tax payments [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party							0	180
Related Party Tax Expense, Due from Affiliates, Current		5
Energy Future Intermediate Holding CO LLC [Member] | TCEH to EFH [Member] | Indirect Guarantee of Indebtedness [Member] | Line of Credit [Member]
Related Party Transaction [Line Items]
Long-term debt, gross								698
Energy Future Intermediate Holding CO LLC [Member] | Goldman, Sachs & Co. [Member] | Secured Debt [Member] | Senior 11 Point 750 Percent Secured Second Lien Notes and 6 Point 875 Percent Senior Secured Notes [Member]
Related Party Transaction [Line Items]
Debt Issuance Cost								10
Energy Future Intermediate Holding CO LLC [Member] | Goldman, Sachs & Co. [Member] | Secured Debt [Member] | 11.75% Senior Secured Second Lien Notes due March 1, 2022 [Member]
Related Party Transaction [Line Items]
Debt Instrument, Face Amount	600				1,150
Energy Future Intermediate Holding CO LLC [Member] | Goldman, Sachs & Co. [Member] | Secured Debt [Member] | 6.875% Fixed Senior Secured First Lien Notes due August 15, 2017 [Member]
Related Party Transaction [Line Items]
Debt Instrument, Face Amount	250
Related Party Transaction, Amounts of Transaction						1
Energy Future Intermediate Holding CO LLC [Member] | Oncor [Member] | Related Party Transactions, Agreement Between Parties To Settle Future Reimbursements [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage		80.00%
Oncor Holdings [Member] | Oncor [Member]
Related Party Transaction [Line Items]
Percentage Of Equity Method Investment Consolidated Revenues Related To Services Provided To Entity		27.00%					25.00%	29.00%
Oncor Holdings [Member] | Energy Future Holdings Corp. [Member] | Receivable attributable to income taxes [Member]
Related Party Transaction [Line Items]
Due from Affiliate, Current							120
Oncor Holdings [Member] | Energy Future Holdings Corp. [Member] | Payable Attributable To Income Taxes [Member]
Related Party Transaction [Line Items]
Due to Affiliate, Current							7
Oncor Holdings [Member] | TCEH to EFH [Member]
Related Party Transaction [Line Items]
Multiemployer Plans, Collective-Bargaining Arrangement, Liability of Nonrecoverable Portion of Unfunded Obligation									$20

Supplementary_Financial_Inform2

Supplementary Financial Information (Schedule of Fair Value of Debt) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Reported Value Measurement [Member] | Debtor-In-Possession Facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$5,400	$0
Reported Value Measurement [Member] | Pre-Petition Notes, Loans And Other Debt (Reported As Liabilities Subject To Compromise) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	3,876	0
Reported Value Measurement [Member] | Pre-Petition Notes, Loans And Other Debt (Excluding Capital Leases) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	0	7,877
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Debtor-In-Possession Facility [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	5,400	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Pre-Petition Notes, Loans And Other Debt (Reported As Liabilities Subject To Compromise) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	4,336	0
Fair Value, Inputs, Level 2 [Member] | Estimate of Fair Value Measurement [Member] | Pre-Petition Notes, Loans And Other Debt (Excluding Capital Leases) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$0	$7,849

Supplementary_Financial_Inform3

Supplementary Financial Information (Interest Income Recorded on Securities) (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Open Option Contracts Written [Line Items]
Accretion of purchase discount		$0	$0	$92
Mark-to-market gain reclassified from AOCI	284
Impairments related to issuer credit		0	0	-14
Total interest		0	284	598
Available-for-sale Securities [Member]
Open Option Contracts Written [Line Items]
Interest received/accrued		0	0	232
Accretion of purchase discount		0	0	92
PIK interest received/accrued related to EFH Corp. Toggle Notes		0	0	288
Mark-to-market gain reclassified from AOCI		0	284	0
Impairments related to issuer credit		0	0	-14
Total interest		$0	$284	$598

Supplementary_Financial_Inform4

Supplementary Financial Information (Supplementary Cash Flow Information) (Details) (USD $)	12 Months Ended						1 Months Ended	3 Months Ended	1 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Jan. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Dec. 31, 2012
Cash payments (receipts) related to:
Interest paid	$376		$619		$352
Interest received on investments in debt of affiliates (net of tax) (a)	0		0		-184	[1]
Income taxes	0		-5		180
Reorganization Items	38	[2]	0		0
Noncash investing and financing activities:
Receipt of additional EFH Corp. Toggle Notes in lieu of cash interest	0		0		344
Principal amount of toggle notes issued in lieu of cash interest	0		173		0
Parent's payment of interest on pushed-down debt accounted for as a contribution of capital (net of tax)	0		23	[3]	22	[3]
Reduction of debt pushed down from EFH Corp.	0		-420	[4]	-282	[4]
Debt exchange transactions	-85	[5]	14	[5]	457	[5]
Distribution to EFH Corp. of debt held as an investment	0		-5,778		160
Income tax on interest received on holdings of affiliate debt	0		-88		0
Principal Amount Of Affiliate Debt Given In Exchange Transaction	838		564
Long Term Debt And Capital Leases Issued, Principal Amount			1,564
Secured Debt [Member]
Noncash investing and financing activities:
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction							1,310
Senior Notes [Member]
Noncash investing and financing activities:
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction								160
Energy Future Holdings Corp. [Member] | Push Down Debt [Member]
Noncash investing and financing activities:
Debt Instrument, Percentage of principal plus unamortized premium of Parent Merger-related debt guaranteed by subsidiary	50.00%		50.00%
10% Fixed Senior Secured First Lien Notes due December 1, 2020 [Member] | Secured Debt [Member]
Noncash investing and financing activities:
Long Term Debt And Capital Leases Issued, Principal Amount							1,302
9.75 Senior Secured Notes Due 2019 [Member] | Secured Debt [Member]
Noncash investing and financing activities:
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction							139
11.25%/ 12.25% Senior Toggle Notes Due 2018 [Member] | Secured Debt [Member]
Noncash investing and financing activities:
Long Term Debt And Capital Leases Issued, Principal Amount							89
Energy Future Intermediate Holding CO LLC [Member] | Senior Secured Super-Priority First Lien Term Loan [Member] | First-Lien Debtor-in-Possession Facility [Member]
Noncash investing and financing activities:
Debtor-In-Possession Financing, Borrowings Used In Exchange Transaction For Pre-Petition Debt									1,836
Energy Future Intermediate Holding CO LLC [Member] | Fixed Senior Secured First Lien 6.875% Notes and Fixed Senior Secured First Lien 10% Notes [Member] | Secured Debt [Member]
Noncash investing and financing activities:
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction									1,673
Energy Future Intermediate Holding CO LLC [Member] | 11.25%/12.25% Senior Toggle Notes due December 1, 2018 [Member] | Senior Notes [Member]
Noncash investing and financing activities:
Long Term Debt And Capital Leases Issued, Principal Amount										1,304
Energy Future Intermediate Holding CO LLC [Member] | Senior Notes [Member]
Noncash investing and financing activities:
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction										1,761
Energy Future Intermediate Holding CO LLC [Member] | 10.875% EFH Corp. Fixed Senior Notes due November 1, 2017 [Member] | Senior Notes [Member]
Noncash investing and financing activities:
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction								39
Energy Future Holdings Corp. [Member] | Secured Debt [Member]
Noncash investing and financing activities:
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction							95
Energy Future Holdings Corp. [Member] | 9.75 Senior Secured Notes Due 2019 [Member] | Secured Debt [Member]
Noncash investing and financing activities:
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction							113
Energy Future Holdings Corp. [Member] | 11.25/12.00% EFH Corp. Senior Toggle Notes due November 1, 2017 [Member] | Senior Notes [Member]
Noncash investing and financing activities:
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction							33
Energy Future Holdings Corp. [Member] | 10.875% Senior Notes due 2017 [Member] | Senior Notes [Member]
Noncash investing and financing activities:
Principal Amount Of Affiliate Debt Acquired In Exchange Transaction							31
RSA First Lien Note Parties And Qualifying Holders of EFIH First Lien Notes Tendered By Participation Date [Member] | Energy Future Intermediate Holding CO LLC [Member] | Fixed Senior Secured First Lien 6.875% Notes and Fixed Senior Secured First Lien 10% Notes [Member] | Secured Debt [Member]
Noncash investing and financing activities:
Debt Instrument, Increase, Accrued Interest									$78
[1]	(a)Interest received in 2012 reported as an increase in membership interests (See Note 11).
[2]	(b)Represents cash payments for legal and other professional services reported in reorganization items (See Note 7).
[3]	(c)Reflects noncash settlement of certain income taxes payable arising as a result of the sale of noncontrolling interests in Oncor.
[4]	(d)For the year ended December 31, 2013, represents $838 million principal amount of EFH Corp. debt exchanged (at 50%). For the year ended December 31, 2012, represents $564 million principal amount of EFH Corp. debt exchanged (at 50%). See Note 8.
[5]	(e)For the year ended December 31, 2014, represents $1.836 billion principal amount of loans issued under the EFIH DIP Facility in excess of the $1.673 billion principal amount of EFIH First Lien Notes exchanged and $78 million of related accrued interest. For the year ended DecemberB 31, 2013 represents, $1.302 billion of EFIH debt issued in exchange for $1.310 billion of EFH Corp. and EFIH debt and $89 million of EFIH debt issued in exchange for $95 million of EFH Corp. debt. For the year ended DecemberB 31, 2012, represents $1.304 billion of EFIH debt issued in exchange for $1.761 billion of EFH Corp. debt. See Note 8.