Document and Entity Information	3 Months Ended
	Feb. 28, 2013
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Feb. 28, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Trading Symbol	JEF
Entity Registrant Name	JEFFERIES GROUP LLC
Entity Central Index Key	0001084580
Current Fiscal Year End Date	--11-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	0