Reorganization Items (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		5 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013
Schedule of Reorganization Costs [Line Items]
Loss on exchange and settlement of EFIH First Lien Notes (Notes 5 and 6)	$ 0		$ 108	$ 108	$ 0
Debtor Reorganization Items, Debtor-in-Possession Facility Financing Costs	0		93
Debtor Reorganization Items, Legal Fees	5		22
Debtor Reorganization Items, Consulting and Advisory Professional Fees	2		12
Reorganization Items	7	0	235	235	0
First-Lien Debtor-in-Possession Facility [Member] | Senior Secured Super-Priority First Lien Term Loan [Member] | Energy Future Intermediate Holding CO LLC [Member]
Schedule of Reorganization Costs [Line Items]
Loss on exchange and settlement of EFIH First Lien Notes (Notes 5 and 6)				$ 108