Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 01, 2022	Apr. 02, 2021	Apr. 01, 2022	Apr. 02, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 305.8	$ 325.0	$ 705.7	$ 834.3
Other comprehensive income (loss), net of tax:
Fair value of investments	(0.3)	(0.1)	(0.4)	(0.3)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	0.0	0.0	(3.3)	(0.3)
Comprehensive income	$ 305.5	$ 324.9	$ 708.6	$ 834.3