Income Taxes - Components of Income Tax Expense from Continuing Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 25, 2023	Jun. 26, 2022	Jun. 27, 2021
Current:
Federal	$ 0.3	$ 0.3	$ 0.1
Foreign	0.5	8.0	0.1
State	0.1	0.1	0.2
Total current	0.9	8.4	0.4
Deferred:
Federal	0.7	0.7	0.7
Foreign	(0.2)	(0.1)	0.0
State	0.0	0.0	0.0
Total deferred	0.5	0.6	0.7
Income tax expense	$ 1.4	$ 9.0	$ 1.1