CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 27, 2025	Dec. 28, 2024	Dec. 27, 2025	Dec. 28, 2024
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 78.2	$ (60.9)	$ 82.4	$ (143.3)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	0.0	(0.3)	(0.3)	(0.3)
Net change in unrealized gain on available-for-sale securities	0.3	(1.1)	0.7	1.2
Other comprehensive income (loss), net of tax	0.3	(1.4)	0.4	0.9
Comprehensive income (loss), net of tax	$ 78.5	$ (62.3)	$ 82.8	$ (142.4)