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Commitments and Contingencies (Details) £ in Millions	3 Months Ended
Commitments and Contingencies (Details) £ in Millions	Oct. 03, 2020 USD ($)	Sep. 28, 2019 USD ($)	Oct. 03, 2020 GBP (£)	Jun. 27, 2020 USD ($)	Jul. 02, 2016 GBP (£)	Jun. 30, 2016 GBP (£)
Loss Contingencies [Line Items]
Guarantee liabilities	$ 0			$ 0
Standby letters of credit	$ 7,500,000
Product Warranties
Warranty Term for most products	3 years
Changes in warranty reserve
Balance as of beginning of period	$ 9,400,000	$ 8,700,000
Provision for warranty	400,000	400,000
Utilization of reserve	(200,000)	(1,000,000.0)
Adjustments to pre-existing warranties (includes changes in estimates)	0	700,000
Balance as of end of period	9,600,000	$ 8,800,000
Performance bond
Loss Contingencies [Line Items]
Guarantee liabilities	900,000
Judicial ruling \| Case related to amendment of pension for foreign subsidiary
Loss Contingencies [Line Items]
Loss contingency accrual	$ 8,400,000		£ 6.5
Minimum \| Judicial ruling \| Case related to amendment of pension for foreign subsidiary
Loss Contingencies [Line Items]
Estimated liability (in pounds) \| £						£ 5.7
Loss contingency accrual \| £					£ 5.7
Maximum \| Judicial ruling \| Case related to amendment of pension for foreign subsidiary
Loss Contingencies [Line Items]
Estimated liability (in pounds) \| £						£ 8.4