Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jul. 01, 2022	Jun. 30, 2023	Jul. 01, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 195.8	$ 267.3	$ 738.0	$ 973.0
Other comprehensive income (loss), net of tax:
Fair value of investments	0.0	0.2	0.0	(0.2)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	0.0	0.0	(0.8)	3.3
Comprehensive income	$ 195.8	$ 267.5	$ 737.2	$ 976.1