Leases, Commitments and Contingencies - Schedule of Components of Leases (Detail) - USD ($) $ in Millions	Jun. 26, 2021	Jun. 27, 2020
Leases Commitments And Contingencies [Abstract]
Operating lease right-of-use assets	$ 31.7	$ 21.0
Operating Lease, Liability, Current		Operating lease liabilities
Operating lease liabilities	9.3	$ 6.5
Operating Lease, Liability, Noncurrent		Operating lease liabilities, long-term
Operating lease liabilities, long-term	$ 24.0	$ 14.6
Operating Lease, Liability	Total operating lease liabilities	Total operating lease liabilities
Total operating lease liabilities	$ 33.3	$ 21.1