Accumulated Other Comprehensive Loss (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	$ 710,100,000	$ 770,300,000	$ 734,900,000	$ 803,500,000
Other comprehensive income (loss) before reclassification			(14,200,000)
Amounts reclassified to accumulated other comprehensive loss			1,900,000
Net change in accumulated other comprehensive income (loss)	12,200,000	19,700,000	(12,300,000)	37,400,000
Balance at the end of the period	728,300,000	776,100,000	728,300,000	776,100,000
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	(127,400,000)	(74,800,000)	(102,900,000)	(92,500,000)
Net change in accumulated other comprehensive income (loss)	12,200,000	19,700,000	(12,300,000)	37,400,000
Balance at the end of the period	(115,200,000)	$ (55,100,000)	(115,200,000)	$ (55,100,000)
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			300,000
Amounts reclassified to accumulated other comprehensive loss			400,000
Net change in accumulated other comprehensive income (loss)			700,000
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			(74,000,000)
Other comprehensive income (loss) before reclassification			(14,500,000)
Amounts reclassified to accumulated other comprehensive loss			0
Net change in accumulated other comprehensive income (loss)			(14,500,000)
Balance at the end of the period	(88,500,000)		(88,500,000)
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			1,500,000
Net change in accumulated other comprehensive income (loss)			1,500,000
Balance at the end of the period	$ (21,600,000)		$ (21,600,000)