Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2012	Jun. 30, 2012	Mar. 05, 2013 Class B Units [Member]	Mar. 05, 2013 Class C Convertible Preferred [Member]	Mar. 05, 2013 Limited Partners-Affiliated - Common [Member]	Mar. 05, 2013 General Partner [Member]
Entity Information [Line Items]
Entity Registrant Name	QR Energy, LP
Entity Central Index Key	0001502012
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Trading Symbol	qre
Entity Public Float		$ 618,965,686
Entity Common Stock, Shares Outstanding			6,133,558	16,666,667	58,443,978	51,036
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2012