Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	May. 30, 2015	Feb. 28, 2015	Nov. 29, 2014	Aug. 30, 2014	May. 31, 2014	Mar. 01, 2014	Nov. 30, 2013	Aug. 31, 2013	May. 30, 2015	May. 31, 2014	Jun. 01, 2013
Quarterly Financial Data [Abstract]
Net sales	$ 403,011	$ 437,556	$ 378,617	$ 356,944	$ 371,582	$ 395,522	$ 354,275	$ 319,528	$ 1,576,128	$ 1,440,907	$ 1,288,104
Gross profit	109,394	112,517	92,709	81,101	91,291	91,895	74,667	44,911	395,721	302,764	214,549
Net income attributable to Cal-Maine Foods, Inc.	$ 46,114	$ 50,882	$ 36,603	$ 27,655	$ 31,492	$ 42,853	$ 26,106	$ 8,756	$ 161,254	$ 109,207	$ 50,423
Net income per share:
Basic	$ 0.96	$ 1.06	$ 0.76	$ 0.57	$ 0.66	$ 0.89	$ 0.54	$ 0.18	$ 3.35	$ 2.27	$ 1.05
Diluted	$ 0.95	$ 1.05	$ 0.76	$ 0.57	$ 0.65	$ 0.89	$ 0.54	$ 0.18	$ 3.33	$ 2.26	$ 1.05