Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 28, 2025	Mar. 29, 2024	Mar. 28, 2025	Mar. 29, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 68.7	$ 183.3	$ 230.7	$ 414.6
Other comprehensive income (loss), net of tax:
Fair value of investments	0.0	0.0	(0.1)	0.1
Pension adjustments	0.0	0.0	0.0	(0.2)
Comprehensive income	$ 68.7	$ 183.3	$ 230.6	$ 414.5