Accrued Dividends Payable And Dividends per Common Share (Schedule of Dividends) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended			6 Months Ended
	Nov. 27, 2021	Nov. 28, 2020	Aug. 29, 2020	Nov. 27, 2021	Nov. 28, 2020
Class of Stock [Line Items]
Net Income (Loss)	$ 1,173	$ 12,155		$ (16,853)	$ (7,244)
Cumulative losses to be recovered prior to payment of divided at beginning of period	(22,270)	$ (20,769)		(4,244)	(1,370)
Net income available for dividend	0		$ 0	$ 0	$ 0
1/3 of net income attributable to Cal-Maine Foods, Inc. available for dividend	$ 0
Common stock outstanding (shares)	48,857			48,857
Common Stock [Member]
Class of Stock [Line Items]
Common stock outstanding (shares)	44,057			44,057
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock outstanding (shares)	4,800			4,800