Cash, Cash Equivalents and Short-term Investments - Summary of Components of Other Income (Expense) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Jul. 03, 2021	Apr. 03, 2021	Dec. 26, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jul. 03, 2021	Jun. 27, 2020	Jun. 29, 2019
Cash and Cash Equivalents [Abstract]
Foreign exchange losses, net									$ (4.4)	$ (1.4)	$ (0.6)
Interest and investment income									5.7	15.8	13.9
Other income, net									1.5	17.0	2.5
Total other income (expense), net	$ 0.7	$ 2.4	$ (0.9)	$ 0.6	$ 3.5	$ 21.7	$ 1.2	$ 5.0	$ 2.8	$ 31.4	$ 15.8