Significant Accounting Policies (Schedule Of Computations Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ 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
Significant Accounting Policies [Abstract]
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
Basic weighted-average common shares (including Class A)									48,136	48,095	47,967
Effect of dilutive securities: Common stock options and restricted stock									301	202	121
Dilutive potential common shares									48,437	48,297	48,088
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