Document And Entity Information - shares	3 Months Ended
	Aug. 27, 2016	Sep. 23, 2016
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Aug. 27, 2016
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Entity Registrant Name	CAL-MAINE FOODS INC
Entity Central Index Key	0000016160
Current Fiscal Year End Date	--05-27
Entity Filer Category	Large Accelerated Filer
Trading Symbol	calm
Common Stock [Member]
Entity Common Stock, Shares Outstanding		43,730,931
Class A Common Stock [Member]
Entity Common Stock, Shares Outstanding		4,800,000