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Equity Earnings (Loss) of Joint Ventures (Parenthetical) (Details 2) - SAL LLC - Equity Method Investee - USD ($)	Jul. 01, 2018	Jul. 02, 2017
Schedule Of Equity Method Investments [Line Items]
Outstanding loan due from SAL LLC to STRATTEC	$ 2,600,000	$ 2,600,000
Accounts receivable balances due from SAL LLC to STRATTEC	$ 82,000	$ 185,000

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