Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	$ 764,300,000	$ 710,100,000	$ 725,800,000	$ 734,900,000
Other comprehensive loss before reclassification			(33,200,000)
Amounts reclassified to accumulated other comprehensive loss			2,200,000
Net change in accumulated other comprehensive (loss) income	(33,100,000)	12,200,000	(31,000,000.0)	(12,300,000)
Balance at the end of the period	676,900,000	728,300,000	676,900,000	728,300,000
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	(132,500,000)	(127,400,000)	(134,600,000)	(102,900,000)
Net change in accumulated other comprehensive (loss) income	(33,100,000)	12,200,000	(31,000,000.0)	(12,300,000)
Balance at the end of the period	(165,600,000)	$ (115,200,000)	(165,600,000)	$ (115,200,000)
Unrealized losses on available-for sale investments
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			(5,000,000.0)
Other comprehensive loss before reclassification			(100,000)
Amounts reclassified to accumulated other comprehensive loss			0
Net change in accumulated other comprehensive (loss) income			(100,000)
Balance at the end of the period	(5,100,000)		(5,100,000)
Foreign currency translation adjustments
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			(101,000,000.0)
Other comprehensive loss before reclassification			(33,100,000)
Amounts reclassified to accumulated other comprehensive loss			0
Net change in accumulated other comprehensive (loss) income			(33,100,000)
Balance at the end of the period	(134,100,000)		(134,100,000)
Change in unrealized components of defined benefit obligations
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period			(28,600,000)
Other comprehensive loss before reclassification			0
Amounts reclassified to accumulated other comprehensive loss			2,200,000
Net change in accumulated other comprehensive (loss) income			2,200,000
Balance at the end of the period	$ (26,400,000)		$ (26,400,000)