Liabilities Subject To Compromise (Guarantees and Push Down of EFH Corp. Pre-Petition Debt) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Liabilities Subject To Compromise, Debt	$ 31,192,000,000	$ 31,192,000,000
Payment of Interest on Pushed-down Debt Accounted for as a Contribution of Capital (net of tax)	0
Push Down Debt [Member]
Debt Instrument [Line Items]
Liabilities Subject To Compromise, Debt		30,000,000
Energy Future Competitive Holdings Company [Member]
Debt Instrument [Line Items]
Liabilities Subject To Compromise, Debt	8,000,000	$ 8,000,000
Energy Future Competitive Holdings Company [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries	60,000,000
Subject to Push Down [Member] | Financial guarantee [Member] | Energy Future Competitive Holdings Company [Member] | Senior Notes [Member] | 10.875% Fixed Senior Notes due November 1, 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries	33,000,000
Subject to Push Down [Member] | Financial guarantee [Member] | Energy Future Competitive Holdings Company [Member] | Senior Notes [Member] | 11.25 / 12.00% Senior Toggle Notes due November 1, 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument Principal Amount Guarantee Obligations Of Subsidiaries	$ 27,000,000
Energy Future Holdings Corp. [Member] | Push Down Debt [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%