Document and Entity Information - shares	9 Months Ended
	Feb. 25, 2017	Mar. 24, 2017
Document Period End Date	Feb. 25, 2017
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
Document Type	10-Q
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Amendment Flag	false
Trading Symbol	calm
Common Stock
Entity Common Stock, Shares Outstanding		43,776,551
Class A Common Stock
Entity Common Stock, Shares Outstanding		4,800,000