Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended
	Sep. 29, 2018	Sep. 30, 2017
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	$ 734,900,000
Other comprehensive income (loss) before reclassification	(13,000,000)
Amounts reclassified to accumulated other comprehensive loss	800,000
Net change in accumulated other comprehensive (loss) income	(12,200,000)	$ 10,700,000
Balance at the end of the period	709,600,000
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	(102,900,000)
Balance at the end of the period	(115,100,000)
Unrealized losses on available-for sale investments
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(5,800,000)
Other comprehensive income (loss) before reclassification	100,000
Amounts reclassified to accumulated other comprehensive loss	200,000
Net change in accumulated other comprehensive (loss) income	300,000
Balance at the end of the period	(5,500,000)
Foreign currency translation adjustments
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(74,000,000)
Other comprehensive income (loss) before reclassification	(13,100,000)
Amounts reclassified to accumulated other comprehensive loss	0
Net change in accumulated other comprehensive (loss) income	(13,100,000)
Balance at the end of the period	(87,100,000)
Change in unrealized components of defined benefit obligations
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(23,100,000)
Other comprehensive income (loss) before reclassification	0
Amounts reclassified to accumulated other comprehensive loss	600,000
Net change in accumulated other comprehensive (loss) income	600,000
Balance at the end of the period	$ (22,500,000)