Document And Entity Information - USD ($)	12 Months Ended
	May 28, 2016	Jul. 15, 2016	Nov. 28, 2015
Document Type	10-K
Amendment Flag	false
Document Period End Date	May 28, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	FY
Entity Registrant Name	CAL-MAINE FOODS INC
Entity Central Index Key	0000016160
Current Fiscal Year End Date	--05-28
Entity Filer Category	Large Accelerated Filer
Trading Symbol	calm
Entity Public Float			$ 1,702,922,791
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Common Stock [Member]
Entity Common Stock, Shares Outstanding		43,734,955
Class A Common Stock [Member]
Entity Common Stock, Shares Outstanding		4,800,000