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Commitments and Contingencies - Guarantees and Outstanding Letters of Credit and Performance Bonds (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 29, 2018	Jul. 03, 2021	Jun. 27, 2020	Jun. 29, 2019
Loss Contingencies [Line Items]
Guarantee liabilities		$ 0	$ 0
Charge to discontinued operations		0	$ 0	$ 2,400,000
Standby letters of credit
Loss Contingencies [Line Items]
Contingency		7,800,000
Performance bonds
Loss Contingencies [Line Items]
Contingency		$ 2,800,000
Spinoff \| Lumentum
Loss Contingencies [Line Items]
Charge to discontinued operations	$ 2,400,000

Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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