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Commitments and Contingencies (Details) £ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2017 USD ($) | Oct. 01, 2016 USD ($) | Jul. 01, 2017 USD ($) | Jul. 02, 2016 USD ($) | Jul. 02, 2016 GBP (£)
Loss Contingencies [Line Items] |  |  |  |  |
Guarantee liabilities | $ 0 |  | $ 0 |  |
Standby letters of credit | $ 11,600,000 |  |  |  |
Product Warranties |  |  |  |  |
Warranty Term for most products | 3 years |  |  |  |
Changes in warranty reserve |  |  |  |  |
Balance as of beginning of period | $ 5,800,000 | $ 4,900,000 |  |  |
Provision for warranty | 500,000 | 1,600,000 |  |  |
Utilization of reserve | (900,000) | (1,100,000) |  |  |
Adjustments related to pre-existing warranties (including changes in estimates) | 700,000 | (200,000) |  |  |
Acquisition of Trilithic | 300,000 | 0 |  |  |
Balance as of end of period | 6,400,000 | $ 5,200,000 |  |  |
Performance bond |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Guarantee liabilities | $ 2,100,000 |  |  |  |
Judicial ruling | Case related to amendment of pension for foreign subsidiary |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency accrual |  |  |  | $ 7,600,000 | £ 5.7

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