Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 02, 2021	Jun. 26, 2020	Jul. 02, 2021	Jun. 26, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 337.8	$ 129.7	$ 1,172.0	$ 567.9
Other comprehensive income, net of tax
Fair value of investments	(0.2)	(0.1)	(0.5)	0.3
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	0.0	0.0	0.3	0.0
Comprehensive income	$ 337.6	$ 129.6	$ 1,171.8	$ 568.2