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Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Non-Operating Expense (Income), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 29, 2025	Jun. 30, 2024	Jun. 25, 2023
Accounting Policies [Abstract]
Interest income	$ (67.6)	$ (135.0)	$ (58.2)
Loss (gain) on legal proceedings	0.0	0.0	(50.3)
Unrealized gain on equity investment	(22.6)	(18.5)	0.0
Loss on Wafer Supply Agreement	9.2	25.3	13.6
Loss on customs matter	0.0	7.7	0.0
Write-off of deferred financing costs	54.7	0.0	0.0
Other expense, net	0.8	1.4	0.3
Non-operating income, net	$ (25.5)	$ (119.1)	$ (94.6)

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Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

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Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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