Income Taxes - Tax Effects of Temporary Differences that Give Rise to Significant Portions of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 28, 2020	Jun. 30, 2019
Deferred tax assets:
Compensation	$ 4.4	$ 9.6
Inventories	7.9	3.8
Sales return reserve and allowance for bad debts	2.6	3.2
Federal and state net operating loss carryforwards	180.1	137.1
Federal credits	30.3	20.0
State credits	1.9	2.9
48C investment tax credits	37.5	25.9
Stock-based compensation	8.3	11.3
Deferred revenue	23.1	22.6
Lease liabilities	6.5	0.0
Other	5.0	4.5
Total gross deferred assets	307.6	240.9
Less valuation allowance	(208.5)	(185.2)
Deferred tax assets, net	99.1	55.7
Deferred tax liabilities:
Property and equipment	(27.8)	(13.9)
Intangible assets	(19.2)	(16.9)
Investments	(1.6)	(0.9)
Prepaid taxes and other	(0.7)	0.0
Foreign earnings recapture	(2.0)	(2.0)
Taxes on unremitted foreign earnings	0.0	(2.4)
Lease assets	(6.3)	0.0
Convertible notes	(42.1)	(20.7)
Total gross deferred liability	(99.7)	(56.8)
Deferred tax liability, net	$ (0.6)	$ (1.1)

Deferred Tax Assets, Lease Liabilities

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Earnings of controlled foreign corporations resulting in a deemed dividend that is in excess of their respective earnings and profits. Such earnings will be taxed at the domestic federal statutory income tax rate, rather than at the respective foreign jurisdictional rate, when adequate earnings and profits are generated in the respective jurisdiction.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from estimated returns and sales allowances.

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Amount of deferred tax liability attributable to taxable temporary differences from investments (excludes investments in subsidiaries and equity method investments).

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Amount of deferred tax liability attributable to taxable temporary differences from leasing arrangements.

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Amount of deferred tax consequences attributable to taxable temporary differences derived from prepaid expenses.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiary and other recognized entity not within country of domicile. Includes, but is not limited to, other basis differences.

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