Net Loss per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Dec. 02, 2017	Nov. 26, 2016	Dec. 02, 2017	Nov. 26, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net loss attributable to Cal-Maine Foods, Inc.	$ (26,136)	$ (23,010)	$ (42,129)	$ (53,946)
Basic weighted-average common shares (in shares)	48,330	48,250	48,330	48,249
Dilutive potential common shares (in shares)	48,330	48,250	48,330	48,249
Earnings Per Share, Basic and Diluted [Abstract]
Basic (in dollars per share)	$ (0.54)	$ (0.48)	$ (0.87)	$ (1.12)
Diluted (in dollars per share)	$ (0.54)	$ (0.48)	$ (0.87)	$ (1.12)
Restricted Shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from calculation of earnings per share	138	155	127	148

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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