Document And Entity Information	3 Months Ended
	Sep. 01, 2012	Sep. 27, 2012 Common Stock [Member]	Sep. 27, 2012 Class A Common Stock [Member]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 01, 2012
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Entity Registrant Name	CAL MAINE FOODS INC
Entity Central Index Key	0000016160
Current Fiscal Year End Date	--06-01
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		21,521,291	2,400,000