Document and Entity Information Document and Entity Information - USD ($)	12 Months Ended
	Nov. 28, 2015	Jan. 19, 2016	May. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	CLARCOR INC.
Entity Central Index Key	0000020740
Current Fiscal Year End Date	--11-28
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Nov. 28, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		48,747,796
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 3,070,453,750