Document And Entity Information (USD $)	12 Months Ended
	May 31, 2014	Nov. 29, 2013	Jul. 25, 2014 Common Stock [Member]	Jul. 25, 2014 Class A Common Stock [Member]
Document Type	10-K
Amendment Flag	false
Document Period End Date	May 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Entity Registrant Name	CAL-MAINE FOODS INC
Entity Central Index Key	0000016160
Current Fiscal Year End Date	--05-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding			21,790,827	2,400,000
Entity Public Float		$ 825,325,152
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes