CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 30, 2024	Apr. 01, 2023	Mar. 30, 2024	Apr. 01, 2023
Statement of Comprehensive Income [Abstract]
Net loss	$ (127.0)	$ (39.3)	$ (294.0)	$ (71.4)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(0.1)	0.3	(0.1)	0.3
Net change in unrealized gain on available-for-sale securities	(0.3)	3.4	4.8	6.4
Other comprehensive income (loss), net of tax	(0.4)	3.7	4.7	6.7
Comprehensive loss, net of tax	$ (127.4)	$ (35.6)	$ (289.3)	$ (64.7)