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
	Aug. 29, 2015	Aug. 30, 2014	May. 30, 2015
Dividends Payable [Line Items]
Net income attributable to Cal-Maine Foods, Inc.	$ 143,023	$ 27,655
1/3 of net income attributable to Cal-Maine Foods, Inc. available and accrued for dividend	$ 47,674	$ 9,218
Common stock outstanding (shares)	48,498	48,382
Dividends per common share	$ 0.983	$ 0.191
Percentage of net income attributable to Cal-Maine Foods, Inc.	33.33%
Common Stock [Member]
Dividends Payable [Line Items]
Common stock outstanding (shares)	43,698	43,582	43,698
Class A Common Stock [Member]
Dividends Payable [Line Items]
Common stock outstanding (shares)	4,800	4,800	4,800