Accrued Dividends Payable And Dividends per Common Share (Schedule of Dividends) (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
Class of Stock [Line Items]
Net income (loss) attributable to Cal-Maine Foods, Inc.	$ 109,986	$ (4,244)	$ 132,650	$ 2,060	$ 18,391
Cumulative losses to be recovered prior to payment of divided at beginning of period	0	0	4,244	1,370
Net income available for dividend	109,986	0	$ 0	$ 0
1/3 of net income attributable to Cal-Maine Foods, Inc. available for dividend	$ 36,662	$ 0
Common stock outstanding (shares)	48,940	48,858	48,940	48,858
Dividends per common share (in dollars per share)	$ 0.749	$ 0	$ 0.874	$ 0.034
Percentage of net income loss used to compute accrued dividends			33.33%
Common Stock [Member]
Class of Stock [Line Items]
Common stock outstanding (shares)	44,140	44,058	44,140	44,058
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock outstanding (shares)	4,800	4,800	4,800	4,800