Equity (Loss) Earnings of Joint Ventures - Summarized Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 28, 2020	Jun. 30, 2019
Summarized statements of operations
STRATTEC’s equity (loss) earnings of VAST LLC	$ (209)	$ 2,783
VAST LLC
Summarized statements of operations
Net sales	153,006	161,660
Cost of goods sold	125,012	128,375
Gross profit	27,994	33,285
Engineering, selling and administrative expense	28,812	27,624
Impairment charge	2,000
(Loss) income from operations	(2,818)	5,661
Other income, net	1,556	3,559
(Loss) income before provision for income taxes	(1,262)	9,220
Provision for income taxes	466	1,292
Net (loss) income	(1,728)	7,928
STRATTEC’s share of VAST LLC Net (loss) Income	(576)	2,643
Intercompany profit eliminations	11	12
STRATTEC’s equity (loss) earnings of VAST LLC	$ (565)	$ 2,655