Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 27, 2021	Feb. 29, 2020	Feb. 27, 2021	Feb. 29, 2020
Condensed Consolidated Statements of Operations [Abstract]
Net sales	$ 359,080	$ 345,588	$ 999,189	$ 898,276
Cost of sales	311,563	295,760	876,457	840,198
Gross profit	47,517	49,828	122,732	58,078
Selling, general and administrative	47,656	44,231	135,494	132,434
Loss on disposal of fixed assets	354	385	476	467
Operating income (loss)	(493)	5,212	(13,238)	(74,823)
Other income (expense):
Interest income, net	591	803	2,181	3,628
Royalty income	321	414	906	1,173
Patronage dividends	9,004	10,096	9,004	10,096
Equity income of unconsolidated entities	1,872	1,445	1,886	537
Other, net	537	79	1,485	1,897
Total other income, net	12,325	12,837	15,462	17,331
Income (loss) before income taxes	11,832	18,049	2,224	(57,492)
Income tax (benefit) expense	(1,716)	4,278	(4,080)	(15,356)
Net income (loss)	13,548	13,771	6,304	(42,136)
Less: Income (loss) attributable to noncontrolling interest	0	22	0	(64)
Net income (loss) attributable to Cal-Maine Foods, Inc.	$ 13,548	$ 13,749	$ 6,304	$ (42,072)
Net income (loss) per common share attributable to Cal-Maine Foods, Inc.:
Basic (in dollars per share)	$ 0.28	$ 0.28	$ 0.13	$ (0.87)
Diluted (in dollars per share)	$ 0.28	$ 0.28	$ 0.13	$ (0.87)
Weighted average shares outstanding:
Basic	48,530	48,473	48,511	48,455
Diluted	48,659	48,588	48,649	48,455