Condensed Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, 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 Income [Abstract]
Net sales	$ 437,556		$ 395,522		$ 1,173,117		$ 1,069,325
Cost of sales	325,039		303,627		886,790		857,852
Gross profit	112,517		91,895		286,327		211,473
Selling, general and administrative expense	40,492		45,299		117,542		112,949
Operating income	72,025		46,596		168,785		98,524
Other income (expense):
Interest expense, net	(351)		(563)		(1,362)		(2,049)
Royalty income	331		1,037		2,355		3,449
Patronage dividends	4,336		5,841		4,581		6,093
Equity in income of affiliates	817		1,530		1,462		2,484
Other, net	(84)		4,158		549		4,795
Nonoperating income (expense), total	5,049		12,003		7,585		14,772
Income before income taxes and noncontrolling interest	77,074		58,599		176,370		113,296
Income tax expense	26,115		15,643		60,365		35,195
Net income before noncontrolling interest	50,959		42,956		116,005		78,101
Less: Net income attributable to noncontrolling interest	77		103		865		386
Net income attributable to Cal-Maine Foods, Inc.	$ 50,882		$ 42,853		$ 115,140		$ 77,715
Net income per common share attributable to Cal-Maine Foods, Inc.:
Basic	$ 1.06		$ 0.89		$ 2.39		$ 1.61
Diluted	$ 1.05		$ 0.89		$ 2.38		$ 1.61
Dividends per common share	$ 0.350	[1]	$ 0.295	[1]	$ 0.793	[1]	$ 0.510	[1]
Weighted average shares outstanding:
Basic	48,137		48,095		48,134		48,122
Diluted	48,447		48,324		48,416		48,309

[1] Dividends per common share = 1/3 of net income attributable to Cal-Maine Foods, Inc. available for dividend ÷ Total common stock outstanding (shares). Per share amounts for the thirteen and thirty-nine weeks ended February 28, 2015 are estimated based on outstanding shares as of the end of the period; actual per share amounts will be determined as of the dividend record date.