Income Taxes - Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Federal:
Current	$ 250.6	$ 298.6	$ 453.6
Deferred	(72.1)	(129.8)	(45.6)
Federal, Total	178.5	168.8	408.0
State:
Current	45.9	54.8	84.7
Deferred	(9.4)	(9.5)	(11.9)
State, Total	36.5	45.3	72.8
Foreign:
Current	32.7	99.0	23.2
Deferred	(27.6)	(26.9)	(12.6)
Foreign, Total	5.1	72.1	10.6
Provision for income taxes	$ 220.1	$ 286.2	$ 491.4