Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Feb. 28, 2015	Mar. 01, 2014	Feb. 28, 2015	Mar. 01, 2014
Condensed Consolidated Statements Of Comprehensive Income [Abstract]
Net income including noncontrolling interests	$ 50,959us-gaap_ProfitLoss	$ 42,956us-gaap_ProfitLoss	$ 116,005us-gaap_ProfitLoss	$ 78,101us-gaap_ProfitLoss
Other comprehensive income (loss), before tax:
Unrealized holding gain (loss) on available-for-sale securities, net of reclassification adjustments	(42)	97	(115)	325
Income tax (expense) benefit related to items of other comprehensive income	17	(37)	45	(126)
Other comprehensive income (loss), net of tax	(25)	60	(70)	199
Comprehensive income	50,934	43,016	115,935	78,300
Less: comprehensive income attributable to the noncontrolling interest	77	103	865	386
Comprehensive income attributable to Cal-Maine Foods, Inc.	$ 50,857us-gaap_ComprehensiveIncomeNetOfTax	$ 42,913us-gaap_ComprehensiveIncomeNetOfTax	$ 115,070us-gaap_ComprehensiveIncomeNetOfTax	$ 77,914us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount before tax, after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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