Quarterly Financial Data (Schedule of Quarterly Financial Data) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
	Dec. 29, 2017	Jun. 02, 2018	Mar. 03, 2018	Dec. 02, 2017	Sep. 02, 2017	Jun. 03, 2017	Feb. 25, 2017	Nov. 26, 2016	Aug. 27, 2016	Jun. 02, 2018	Jun. 03, 2017	May 28, 2016
Quarterly Financial Information Disclosure [Abstract]
Net sales		$ 443,095	$ 435,820	$ 361,172	$ 262,845	$ 274,584	$ 306,540	$ 253,544	$ 239,845	$ 1,502,932	$ 1,074,513	$ 1,908,650
Gross profit		141,216	120,098	82,396	17,336	12,006	39,165	3,948	(9,569)	361,046	45,550	648,074
Net income (loss) attributable to Cal-Maine Foods, Inc.		$ 71,767	$ 96,294	$ (26,136)	$ (15,993)	$ (24,471)	$ 4,139	$ (23,010)	$ (30,936)	$ 125,932	$ (74,278)	$ 316,041
Net income (loss) per share:
Basic (in dollars per share)		$ 1.48	$ 1.99	$ (0.54)	$ (0.33)	$ (0.51)	$ 0.09	$ (0.48)	$ (0.64)	$ 2.60	$ (1.54)	$ 6.56
Diluted (in dollars per share)		$ 1.48	$ 1.99	$ (0.54)	$ (0.33)	$ (0.51)	$ 0.09	$ (0.48)	$ (0.64)	$ 2.60	$ (1.54)	$ 6.53
Amount of settlement	$ 80,800			$ 80,800
Tax benefit recorded from tax reform, provisional				$ 35,000
Tax benefit recorded from tax reform		$ 8,000								$ 43,000
Domestic manufacturers deduction						$ (4,100)				$ (2,545)	$ 4,095	$ (13,332)