Revenue (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Dec. 28, 2019	Dec. 28, 2019	Jun. 29, 2019
Disaggregation of Revenue [Line Items]
Unbilled receivables	$ 5.4	$ 5.4	$ 11.5
Change in Contract with Customer, Liability (Roll Forward)
Balance at beginning of period	64.4	68.5
Revenue deferrals for new contracts	33.6	52.5
Revenue recognized during the period	(26.1)	(49.1)
Balance at end of period	71.9	71.9
Short-term deferred revenue	53.2	53.2	55.3
Long-term deferred revenue	$ 18.7	$ 18.7	$ 13.2
Minimum
Disaggregation of Revenue [Line Items]
Payment period from invoice date		30 days
Maximum
Disaggregation of Revenue [Line Items]
Payment period from invoice date		90 days