Document and Entity Information Document	9 Months Ended
	Sep. 30, 2013	Nov. 01, 2013
Entity Information
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Trading Symbol	RGP
Entity Registrant Name	Regency Energy Partners LP
Entity Central Index Key	0001338613
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		210,714,852