Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Direct Effects of a Change in Accounting Principle

-URI http://asc.fasb.org/extlink&oid=6510796

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 250

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28359718&loc=d3e22580-107794

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Indirect Effects of a Change in Accounting Principle

-URI http://asc.fasb.org/extlink&oid=6515603

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accounting Change

-URI http://asc.fasb.org/extlink&oid=6503790

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Retrospective Application

-URI http://asc.fasb.org/extlink&oid=6523989

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 250

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=28359718&loc=d3e22499-107794

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 250

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=28359718&loc=d3e22583-107794

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Change in Accounting Principle

-URI http://asc.fasb.org/extlink&oid=6507316

Name:	us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Description Of Business And Significant Accounting Policies (Details) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Nov. 30, 2008	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015 entity	Jun. 30, 2014	Dec. 15, 2015 USD ($)	Dec. 31, 2002 USD ($)
Description of Business [Line Items]
Number of entities that would possibly be bankrupt \| entity				1
Principal amount of transition bonds issued							$ 1,300
Percentage of equity interest sold in the event of bankruptcy	19.75%
Scenario, Forecast [Member]
Description of Business [Line Items]
Expected decrease to other noncurrent assets and long-term debt						$ (40)
Sales [Member] \| TCEH [Member]
Description of Business [Line Items]
Concentration Risk Percentage		24.00%	25.00%	24.00%	25.00%
Oncor
Description of Business [Line Items]
Percentage of membership interest owned by company				80.03%
Texas Transmission [Member]
Description of Business [Line Items]
Percentage of membership interest owned by non-controlling owners		19.75%		19.75%