Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended
	Sep. 28, 2024	Sep. 30, 2023
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	$ 681,600,000	$ 690,800,000
Other comprehensive income before reclassification	30,300,000
Amounts reclassified out of accumulated other comprehensive loss	100,000
Net change in accumulated other comprehensive loss	30,400,000	(20,500,000)
Balance at the end of the period	702,100,000	675,200,000
Tax impact of amortization of actuarial gains (losses)	0
Total
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(144,000,000.0)	(136,000,000.0)
Net change in accumulated other comprehensive loss	30,400,000	(20,500,000)
Balance at the end of the period	(113,600,000)	$ (156,500,000)
Unrealized losses on available-for sale investments
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(5,300,000)
Other comprehensive income before reclassification	0
Amounts reclassified out of accumulated other comprehensive loss	0
Net change in accumulated other comprehensive loss	0
Balance at the end of the period	(5,300,000)
Foreign  currency translation adjustments
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(131,400,000)
Other comprehensive income before reclassification	30,300,000
Amounts reclassified out of accumulated other comprehensive loss	0
Net change in accumulated other comprehensive loss	30,300,000
Balance at the end of the period	(101,100,000)
Change in unrealized components of defined benefit obligations
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(7,300,000)
Other comprehensive income before reclassification	0
Amounts reclassified out of accumulated other comprehensive loss	100,000
Net change in accumulated other comprehensive loss	100,000
Balance at the end of the period	$ (7,200,000)