Net Income Per Common Share (Computation Of Basic And Diluted Net Income Per Share Attributable To The Company) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Nov. 29, 2014	Nov. 30, 2013	Jun. 01, 2013	Nov. 29, 2014	Nov. 30, 2013
Net Income Per Common Share [Abstract]
Net income attributable to Cal-Maine Foods, Inc.	$ 36,603us-gaap_NetIncomeLoss	$ 26,106us-gaap_NetIncomeLoss	$ (3,833)us-gaap_NetIncomeLoss	$ 64,258us-gaap_NetIncomeLoss	$ 34,862us-gaap_NetIncomeLoss
Basic weighted-average common shares	48,136	48,091		48,133	48,084
Restricted shares	245	126		245	126
Common stock options	23	58		22	58
Dilutive potential common shares	48,404	48,275		48,400	48,268
Basic	$ 0.76us-gaap_EarningsPerShareBasic	$ 0.54us-gaap_EarningsPerShareBasic		$ 1.34us-gaap_EarningsPerShareBasic	$ 0.73us-gaap_EarningsPerShareBasic
Diluted	$ 0.76us-gaap_EarningsPerShareDiluted	$ 0.54us-gaap_EarningsPerShareDiluted		$ 1.33us-gaap_EarningsPerShareDiluted	$ 0.72us-gaap_EarningsPerShareDiluted

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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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