Accrued Dividends Payable And Dividends Per Common Share (Schedule Of Dividends Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 28, 2015	Nov. 29, 2014	Nov. 28, 2015	Nov. 29, 2014	May. 30, 2015
Dividends Payable [Line Items]
Net income attributable to Cal-Maine Foods, Inc.	$ 109,230	$ 36,603	$ 252,253	$ 64,258
1/3 of net income attributable to Cal-Maine Foods, Inc. available and accrued for dividend	$ 36,410	$ 12,201	$ 84,084	$ 21,419
Common stock outstanding (shares)	48,495	48,382	48,495	48,382
Dividends per common share	$ 0.751	$ 0.252	$ 1.734	$ 0.443
Percentage of net income attributable to Cal-Maine Foods, Inc.			33.33%
Common Stock [Member]
Dividends Payable [Line Items]
Common stock outstanding (shares)	43,695	43,582	43,695	43,582	43,698
Class A Common Stock [Member]
Dividends Payable [Line Items]
Common stock outstanding (shares)	4,800	4,800	4,800	4,800	4,800