Leases - Lease Costs, Term, and Discount Rate (Details) $ in Millions	12 Months Ended
	Jun. 27, 2020 USD ($)
Leases [Abstract]
Finance lease cost, Amortization of right-of-use assets	$ 16.3
Finance lease cost, Interest	0.1
Operating lease cost	15.5
Variable lease cost	1.8
Short-term lease cost	2.6
Sublease income	(2.6)
Total lease cost	$ 33.7
Weighted average remaining lease term (in years):
Operating leases (in years)	8 years 7 months 6 days
Finance leases (in years)	1 year
Weighted average discount rate:
Operating leases (percentage)	3.50%
Finance leases (percentage)	4.40%