Net Income per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 02, 2019	Mar. 03, 2018	Mar. 02, 2019	Mar. 03, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income attributable to Cal-Maine Foods, Inc.	$ 39,777	$ 96,294	$ 73,989	$ 54,165
Basic weighted-average common shares (in shares)	48,417	48,361	48,416	48,340
Dilutive potential common shares (in shares)	48,533	48,476	48,545	48,460
Earnings Per Share, Basic and Diluted [Abstract]
Basic (in dollars per share)	$ 0.82	$ 1.99	$ 1.53	$ 1.12
Diluted (in dollars per share)	$ 0.82	$ 1.99	$ 1.52	$ 1.12
Restricted Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of dilutive securities (in shares)	116	115	129	120