Document and Entity Information - shares	9 Months Ended
	Mar. 02, 2019	Mar. 28, 2019
Document Period End Date	Mar. 02, 2019
Entity Registrant Name	CAL-MAINE FOODS INC
Entity Central Index Key	0000016160
Current Fiscal Year End Date	--06-01
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Document Type	10-Q
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Trading Symbol	calm
Common Stock
Entity Common Stock, Shares Outstanding		43,894,478
Class A Common Stock
Entity Common Stock, Shares Outstanding		4,800,000