Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	May 28, 2022	May 29, 2021	May 30, 2020
Consolidated Statements of Comprehensive Income [Abstract]
Net income (loss)	$ 132,441	$ 2,060	$ 18,328
Other comprehensive loss, before tax:
Unrealized holding gain (loss) available-for-sale securities, net of reclassification adjustments	(1,398)	(736)	59
Increase in accumulated post-retirement benefits obligation, net of reclassification adjustments	(9)	(137)	(445)
Other comprehensive loss, before tax	(1,407)	(873)	(386)
Income tax expense (benefit) related to items of other comprehensive income (loss)	(369)	(236)	(110)
Other comprehensive loss, net of tax	(1,038)	(637)	(276)
Comprehensive income	131,403	1,423	18,052
Less: comprehensive loss attributable to the noncontrolling interest	(209)	0	(63)
Comprehensive income attributable to Cal-Maine Foods, Inc.	$ 131,612	$ 1,423	$ 18,115