Balance Sheet and Other Details - Contract Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 27, 2020	Jun. 29, 2019
Capitalized Contract Cost [Line Items]
Contract asset	$ 3.8	$ 11.5
Change in Contract with Customer, Liability (Roll Forward)
Balance at beginning of period	68.5
Revenue deferrals for new contracts	107.5
Revenue recognized during the period	(101.4)
Balance at end of period	74.6
Short-term deferred revenue	54.6	55.3
Long-term deferred revenue	$ 20.0	$ 13.2
Minimum
Capitalized Contract Cost [Line Items]
Payment period from invoice date	30 days
Maximum
Capitalized Contract Cost [Line Items]
Payment period from invoice date	90 days