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