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. 02, 2018	Mar. 03, 2018	Dec. 02, 2017	Sep. 02, 2017	Jun. 03, 2017	Feb. 25, 2017	Nov. 26, 2016	Aug. 27, 2016	Jun. 02, 2018	Jun. 03, 2017	May 28, 2016
Accounting Policies [Abstract]
Net income (loss) attributable to Cal-Maine Foods, Inc.	$ 71,767	$ 96,294	$ (26,136)	$ (15,993)	$ (24,471)	$ 4,139	$ (23,010)	$ (30,936)	$ 125,932	$ (74,278)	$ 316,041
Basic weighted-average common shares (including Class A) (in shares)									48,353	48,362	48,195
Effect of dilutive securities:
Common stock options and restricted stock (in shares)									115	0	170
Dilutive potential common shares (in shares)									48,468	48,362	48,365
Net income (loss) per common share:
Basic (in dollars per share)	$ 1.48	$ 1.99	$ (0.54)	$ (0.33)	$ (0.51)	$ 0.09	$ (0.48)	$ (0.64)	$ 2.60	$ (1.54)	$ 6.56
Diluted (in dollars per share)	$ 1.48	$ 1.99	$ (0.54)	$ (0.33)	$ (0.51)	$ 0.09	$ (0.48)	$ (0.64)	$ 2.60	$ (1.54)	$ 6.53