Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 309.4	$ 399.9
Other comprehensive income (loss), net of tax:
Fair value of investments	0.0	(0.1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	(0.8)	(3.3)
Comprehensive income	$ 308.6	$ 403.1