Document And Entity Information	9 Months Ended
	Feb. 28, 2015	Mar. 27, 2015
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Feb. 28, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Entity Registrant Name	CAL-MAINE FOODS INC
Entity Central Index Key	0000016160
Current Fiscal Year End Date	--05-30
Entity Filer Category	Large Accelerated Filer
Trading Symbol	calm
Common Stock [Member]
Entity Common Stock, Shares Outstanding		43,671,844
Class A Common Stock [Member]
Entity Common Stock, Shares Outstanding		4,800,000