Net Income 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		12 Months Ended
	May 28, 2022	May 29, 2021	May 28, 2022	May 29, 2021	May 30, 2020
Net Income per Common Share [Abstract]
Net income (loss)			$ 132,441	$ 2,060	$ 18,328
Less: Net loss attributable to noncontrolling interest			(209)	0	(63)
Net income attributable to Cal-Maine Foods, Inc.	$ 109,986	$ (4,244)	$ 132,650	$ 2,060	$ 18,391
Denominator
Weighted-average common shares outstanding, basic (in shares)			48,581	48,522	48,467
Effect of dilutive restricted shares (in shares)			153	134	117
Weighted-average common shares outstanding, diluted (in shares)			48,734	48,656	48,584
Net income per common share attributable to Cal-Maine Foods, Inc.
Basic (in dollars per share)			$ 2.73	$ 0.04	$ 0.38
Diluted (in dollars per share)			$ 2.72	$ 0.04	$ 0.38