CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Jun. 30, 2024	Jun. 25, 2023	Jun. 26, 2022
Income Statement [Abstract]
Revenue, net	$ 807.2	$ 758.5	$ 572.1
Cost of revenue, net	729.8	515.6	364.0
Gross profit	77.4	242.9	208.1
Operating expenses:
Research and development	201.9	165.7	142.6
Sales, general and administrative	246.4	214.3	183.0
Factory start-up costs	53.8	160.2	70.0
Amortization of acquisition-related intangibles	1.1	1.7	2.2
Loss (gain) on disposal or impairment of other assets	1.2	2.0	(0.3)
Other operating expense	18.3	10.8	13.7
Operating loss	(445.3)	(311.8)	(203.1)
Non-operating expense (income), net	127.2	(52.0)	38.8
Loss before income taxes	(572.5)	(259.8)	(241.9)
Income tax expense	1.1	0.7	8.2
Net loss from continuing operations	(573.6)	(260.5)	(250.1)
Net (loss) income from discontinued operations	(290.6)	(69.4)	49.2
Net loss	$ (864.2)	$ (329.9)	$ (200.9)
Basic and diluted loss per share
Continuing operations- basic (USD per share)	$ (4.56)	$ (2.09)	$ (2.08)
Continuing operations - diluted (USD per share)	(4.56)	(2.09)	(2.08)
Net loss - basic (USD per share)	(6.88)	(2.65)	(1.67)
Net loss - diluted (USD per share)	$ (6.88)	$ (2.65)	$ (1.67)
Weighted average shares - basic (shares)	125,693	124,374	120,120
Weighted average shares - diluted (shares)	125,693	124,374	120,120