Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	May 29, 2021	May 30, 2020	Jun. 01, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 2,060	$ 18,328	$ 55,062
Other comprehensive income (loss), before tax:
Unrealized holding gain (loss) available-for-sale securities, net of reclassification adjustments	(736)	59	1,719
Increase in accumulated post-retirement benefits obligation, net of reclassification adjustments	(137)	(445)	(349)
Other comprehensive income (loss), before tax	(873)	(386)	1,370
Income tax expense (benefit) related to items of other comprehensive income (loss)	(236)	(110)	322
Other comprehensive income (loss), net of tax	(637)	(276)	1,048
Comprehensive income	1,423	18,052	56,110
Less: comprehensive income (loss) attributable to the noncontrolling interest	0	(63)	833
Comprehensive income attributable to Cal-Maine Foods, Inc.	$ 1,423	$ 18,115	$ 55,277