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Income Taxes - Schedule of Tax Effects of Temporary Differences that Give Rise to Significant Portions of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 29, 2025	Jun. 30, 2024
Deferred tax assets:
Compensation	$ 8.3	$ 5.4
Inventories	45.3	45.4
Sales return reserve and allowance for bad debts	8.1	11.2
Federal and state net operating loss carryforwards	691.0	506.8
Federal income tax credits	77.0	69.7
State income tax credits	0.7	0.7
48C investment tax credits	35.7	35.7
Investments	0.6	2.3
Stock-based compensation	9.0	10.7
Deferred revenue	25.0	35.0
Lease liabilities	35.1	28.7
Capitalized research and development	120.1	101.6
Convertible notes	58.5	62.6
Nondeductible interest carryforward	95.3	27.7
Other	14.1	3.0
Total gross deferred assets	1,223.8	946.5
Less valuation allowance	(1,041.4)	(734.1)
Deferred tax assets, net	182.4	212.4
Deferred tax liabilities:
Property and equipment	(122.4)	(123.8)
Intangible assets	(5.0)	(58.6)
Other long-term investments	(9.0)	(4.0)
Prepaid taxes	(0.5)	(0.5)
Foreign earnings recapture	(4.2)	(4.2)
Taxes on unremitted foreign earnings	(7.0)	(6.9)
Lease assets	(29.1)	(23.8)
Other	(4.6)	(0.3)
Total gross deferred liability	(181.8)	(222.1)
Deferred tax assets, net	$ 0.6
Deferred tax liability, net		$ (9.7)

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