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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jun. 29, 2019
Changes in accumulated other comprehensive income (loss) by component
Beginning balance	$ 711.4	$ 725.8	$ 734.9
Other comprehensive income before reclassification	65.6
Amounts reclassified from accumulated other comprehensive income	3.1
Net change in accumulated other comprehensive income (loss)	68.7	(31.3)	(31.7)
Ending balance	774.8	711.4	725.8
Unrealized actuarial gain	6.3
Income tax effect	2.2
Total
Changes in accumulated other comprehensive income (loss) by component
Beginning balance	(165.9)	(134.6)	(102.9)
Net change in accumulated other comprehensive income (loss)	68.7	(31.3)	(31.7)
Ending balance	(97.2)	(165.9)	$ (134.6)
Unrealized gains (losses) on available-for-sale investments
Changes in accumulated other comprehensive income (loss) by component
Beginning balance	(5.1)
Other comprehensive income before reclassification	0.0
Amounts reclassified from accumulated other comprehensive income	0.0
Net change in accumulated other comprehensive income (loss)	0.0
Ending balance	(5.1)	(5.1)
Foreign currency translation adjustments
Changes in accumulated other comprehensive income (loss) by component
Beginning balance	(129.6)
Other comprehensive income before reclassification	61.5
Amounts reclassified from accumulated other comprehensive income	0.0
Net change in accumulated other comprehensive income (loss)	61.5
Ending balance	(68.1)	(129.6)
Change in unrealized components of defined benefit obligations, net of tax
Changes in accumulated other comprehensive income (loss) by component
Beginning balance	(31.2)
Other comprehensive income before reclassification	4.1
Amounts reclassified from accumulated other comprehensive income	3.1
Net change in accumulated other comprehensive income (loss)	7.2
Ending balance	$ (24.0)	$ (31.2)

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