Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 29, 2024	Mar. 31, 2023	Mar. 29, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 183.3	$ 232.8	$ 414.6	$ 542.2
Other comprehensive income (loss), net of tax:
Fair value of investments	0.0	0.0	0.1	0.0
Pension adjustments	0.0	0.0	(0.2)	(0.8)
Comprehensive income	$ 183.3	$ 232.8	$ 414.5	$ 541.4