Document and Entity Information	6 Months Ended
	Jun. 02, 2012	Jun. 18, 2012
Entity Information [Line Items]
Entity Registrant Name	CLARCOR INC.
Entity Central Index Key	0000020740
Current Fiscal Year End Date	--12-01
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 02, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		50,122,382