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Basis of Presentation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 26, 2020	Dec. 28, 2019	Jun. 27, 2020
Basis Of Presentation [Line Items]
Carrying value of bank deposit	$ 0.9		$ 0.9
Net gain (loss) on foreign currency transactions	$ (1.1)	$ (0.4)	$ (1.0)	$ 0.1
Money Market Funds [Member]
Basis Of Presentation [Line Items]
Available-for-sale securities, debt securities					$ 521.1

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Basis of presentation.

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- Definition

Foreign currency transaction realized and unrealized gain (loss) net of tax.

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement.

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