Document and Entity Information - shares	9 Months Ended
	Mar. 03, 2018	Mar. 29, 2018
Document Period End Date	Mar. 03, 2018
Entity Registrant Name	CAL-MAINE FOODS INC
Entity Central Index Key	0000016160
Current Fiscal Year End Date	--06-02
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Trading Symbol	calm
Common Stock
Entity Common Stock, Shares Outstanding		43,832,291
Class A Common Stock
Entity Common Stock, Shares Outstanding		4,800,000