Net Income (Loss) per Common Share (Computation of Basic and Diluted Net Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 26, 2022	Nov. 27, 2021	Nov. 26, 2022	Nov. 27, 2021
Net Income (Loss) per Common Share [Abstract]
Net income (loss)	$ 198,294	$ 1,145	$ 323,428	$ (16,881)
Less: Loss attributable to noncontrolling interest	(293)	(28)	(446)	(28)
Net income (loss) attributable to Cal-Maine Foods, Inc.	$ 198,587	$ 1,173	$ 323,874	$ (16,853)
Denominator
Weighted-average common shares outstanding, basic (in shares)	48,624	48,857	48,624	48,859
Effect of dilutive restricted shares (in shares)	216	159	203	0
Weighted-average common shares outstanding, diluted (in shares)	48,840	49,016	48,827	48,859
Net income (loss) per common share attributable to Cal-Maine Foods, Inc.
Basic (in dollars per share)	$ 4.08	$ 0.02	$ 6.66	$ (0.34)
Diluted (in dollars per share)	$ 4.07	$ 0.02	$ 6.63	$ (0.34)