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 30, 2020	Feb. 29, 2020	Nov. 30, 2019	Aug. 31, 2019	Jun. 01, 2019	Mar. 02, 2019	Dec. 01, 2018	Sep. 01, 2018	May 30, 2020	Jun. 01, 2019	Jun. 02, 2018
Class of Stock [Line Items]
Net income (loss) attributable to Cal-Maine Foods, Inc.	$ 60,463	$ 13,749	$ (10,061)	$ (45,760)	$ (19,761)	$ 39,777	$ 21,807	$ 12,406	$ 18,391	$ 54,229	$ 125,932
Cumulative losses to be recovered prior to payment of divided at beginning of period	(61,833)				0				(19,761)	0
Net income (loss) attributable to Cal-Maine Foods, Inc. available for dividend	0				$ 0				$ 0	$ 54,229
1/3 of net income attributable to Cal-Maine Foods, Inc. available for dividend	$ 0
Common stock, shares outstanding (in shares)	48,774								48,774
Dividends per common share (in dollars per share)	$ 0				$ 0				$ 0	$ 0.506
Percentage of net income loss used to compute accrued dividends									33.00%
Common Stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)	43,974				43,894				43,974	43,894
Class A Convertible Common Stock
Class of Stock [Line Items]
Common stock, shares outstanding (in shares)	4,800				4,800				4,800	4,800