Quarterly Financial Data (Schedule of Quarterly Financial Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 03, 2017	Feb. 25, 2017	Nov. 26, 2016	Aug. 27, 2016	May 28, 2016	Feb. 27, 2016	Nov. 28, 2015	Aug. 29, 2015	Jun. 03, 2017	May 28, 2016	May 30, 2015
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 274,584	$ 306,540	$ 253,544	$ 239,845	$ 303,020	$ 449,760	$ 545,975	$ 609,895	$ 1,074,513	$ 1,908,650	$ 1,576,128
Gross profit	12,006	39,165	3,948	(9,569)	40,680	132,726	211,597	263,071	45,550	648,074	395,721
Net income (loss) attributable to Cal-Maine Foods, Inc.	$ (24,471)	$ 4,139	$ (23,010)	$ (30,936)	$ (376)	$ 64,164	$ 109,230	$ 143,023	$ (74,278)	$ 316,041	$ 161,254
Net income (loss) per share:
Basic (in dollars per share)	$ (0.51)	$ 0.09	$ (0.48)	$ (0.64)	$ (0.01)	$ 1.33	$ 2.27	$ 2.97	$ (1.54)	$ 6.56	$ 3.35
Diluted (in dollars per share)	$ (0.51)	$ 0.09	$ (0.48)	$ (0.64)	$ (0.01)	$ 1.33	$ 2.26	$ 2.95	$ (1.54)	$ 6.53	$ 3.33
Domestic manufacturers deduction									$ 4,095	$ (13,332)	$ (7,308)