Share-Based Compensation - Cash Received and Aggregate Intrinsic Value of Stock Options Exercised (Detail) - USD ($) $ in Millions	12 Months Ended
Jun. 26, 2021	Jun. 27, 2020	Jun. 29, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Cash received	$ 23.9	$ 23.9	$ 5.2
Aggregate intrinsic value	$ 8.6	$ 10.8	$ 2.4

Amount of cash inflow from exercise of option under share-based payment arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration