Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2023	Oct. 01, 2022
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	$ 1,355.8	$ 1,875.0
Other comprehensive gain (loss), net	1.1	(0.6)
Balance at the end of the period	1,310.8	1,526.4
Total
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	4.1	0.4
Other comprehensive gain (loss), net	1.1	(0.6)
Balance at the end of the period	5.2	(0.2)
Foreign Currency Translation Adjustments, Net Of Tax
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	10.4	9.7
Other comprehensive gain (loss), net	(0.2)	0.0
Balance at the end of the period	10.2	9.7
Defined Benefit Obligations, Net Of Tax
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(0.4)	1.0
Other comprehensive gain (loss), net	0.0	0.0
Balance at the end of the period	(0.4)	1.0
Unrealized Gain (Loss) On Available-for-sale Securities, Net Of Tax
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	(5.9)	(10.3)
Other comprehensive gain (loss), net	1.3	(0.6)
Balance at the end of the period	$ (4.6)	$ (10.9)