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Income Taxes - Effective Income Tax Rate and Amount Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 26, 2022	Jun. 27, 2021	Jun. 28, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Federal income tax provision at statutory rate	$ (60.1)	$ (71.4)	$ (43.2)
State tax provision, net of federal benefit	(2.5)	(1.9)	(1.9)
Tax exempt interest	(0.2)	(0.1)	(0.5)
(Decrease) increase in tax reserve	(0.2)	0.0	(0.3)
Research and development credits	(5.4)	(4.3)	(3.3)
Foreign tax credit	(0.3)	(0.4)	(0.3)
Increase (decrease) in valuation allowance	(51.6)	75.0	50.3
Extinguishment of convertible notes	(4.5)	0.0	(6.0)
Stock-based compensation	(3.3)	(2.8)	2.1
Statutory rate differences	0.0	1.1	1.2
Tax on distributable foreign earnings	6.8	2.7	0.3
Other foreign adjustments	0.0	(0.1)	0.3
Net operating loss carryback	0.0	0.0	(7.2)
Provision to return adjustments	0.3	(0.2)	(1.3)
Impact of rate changes	0.5	2.7	0.8
Expiration of state credits	0.1	0.7	0.9
Corporate restructuring adjustment	129.1	0.0	0.0
Other	0.3	0.1	0.1
Income tax expense (benefit)	$ 9.0	$ 1.1	$ (8.0)
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal income tax provision at statutory rate	21.00%	21.00%	21.00%
State tax provision, net of federal benefit	1.00%	1.00%	1.00%
Tax exempt interest	0.00%	0.00%	0.00%
(Decrease) increase in tax reserve	0.00%	0.00%	0.00%
Research and development credits	2.00%	1.00%	2.00%
Foreign tax credit	0.00%	0.00%	0.00%
Increase (decrease) in valuation allowance	18.00%	(22.00%)	(25.00%)
Extinguishment of convertible notes	2.00%	0.00%	3.00%
Stock-based compensation	1.00%	1.00%	(1.00%)
Statutory rate differences	0.00%	0.00%	(1.00%)
Tax on distributable foreign earnings	(2.00%)	(1.00%)	0.00%
Other foreign adjustments	0.00%	0.00%	0.00%
Net operating loss carryback	0.00%	0.00%	4.00%
Provision to return adjustments	0.00%	0.00%	1.00%
Impact of rate changes	0.00%	(1.00%)	0.00%
Expiration of state credits	0.00%	0.00%	0.00%
Corporate restructuring adjustment	(45.00%)	0.00%	0.00%
Other	0.00%	0.00%	0.00%
Income tax expense (benefit)	(3.00%)	0.00%	4.00%

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