Revenue (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 28, 2020	Mar. 28, 2020	Jun. 29, 2019
Disaggregation of Revenue [Line Items]
Unbilled receivables	$ 3.6	$ 3.6	$ 11.5
Deferred revenue:
Balance at beginning of period	71.9	68.5
Revenue deferrals for new contracts	26.2	78.7
Revenue recognized during the period	(24.2)	(73.3)
Balance at end of period	73.9	73.9
Short-term deferred revenue	55.2	55.2	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