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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
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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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