Significant Accounting Policies (Schedule Of Computations Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 01, 2019	Mar. 02, 2019	Dec. 01, 2018	Sep. 01, 2018	Jun. 02, 2018	Mar. 03, 2018	Dec. 02, 2017	Sep. 02, 2017	Jun. 01, 2019	Jun. 02, 2018	Jun. 03, 2017
Accounting Policies [Abstract]
Net income (loss) attributable to Cal-Maine Foods, Inc.	$ (19,761)	$ 39,777	$ 21,807	$ 12,406	$ 71,767	$ 96,294	$ (26,136)	$ (15,993)	$ 54,229	$ 125,932	$ (74,278)
Basic weighted-average common shares (including Class A) (in shares)									48,467	48,353	48,362
Effect of dilutive securities:
Common stock options and restricted stock (in shares)									122	115	0
Dilutive potential common shares (in shares)									48,589	48,468	48,362
Net income (loss) per common share:
Basic (in dollars per share)	$ (0.41)	$ 0.82	$ 0.45	$ 0.26	$ 1.48	$ 1.99	$ (0.54)	$ (0.33)	$ 1.12	$ 2.60	$ (1.54)
Diluted (in dollars per share)	$ (0.41)	$ 0.82	$ 0.45	$ 0.26	$ 1.48	$ 1.99	$ (0.54)	$ (0.33)	$ 1.12	$ 2.60	$ (1.54)