Income Taxes - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 30, 2023	Sep. 28, 2024	Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Income Taxes [Line Items]
Income tax benefit		$ (75.6)	$ (220.1)	$ (286.2)
Diluted (in dollars per share)		$ 3.32	$ 1.83	$ 5.13
Valuation allowance, increase (decrease)		$ (28.4)
Net operating losses		134.2
State net operating loss expected to be expired unutilized		107.7
Foreign net operating loss expected to be expired unutilized		208.6
Unrecognized tax benefit that would impact effective tax rate		213.9	$ 240.5	$ 231.6
Interest on income taxes		20.3	15.8	0.7
Interest accrued on unrecognized tax benefits		50.4	30.1
Increase to income tax expense adoption of ASU 2016-16			77.2
Decrease in deferred tax liabilities due to ASU 2016-16			90.8
Increase to Net Income resulted from adoption of ASU 2016-16			$ 13.6
Increase to Earnings per Share resulted from adoption of ASU 2016-16			$ 0.05
state loss carryforward expected to unutilize		438.9
Gross state loss carryforwards		438.9
Gross foreign loss carryforwards		134.2
Unrecognized Tax Benefits		273.2	$ 256.5	$ 247.6	$ 212.8
Change in gross unrecognized tax benefits		16.7	8.9
Net Operating Losses Carryforwards
Income Taxes [Line Items]
Amount with unlimited carry forward periods		97.5
Tax Credit Carryforward
Income Taxes [Line Items]
Amount with unlimited carry forward periods		4.2
Maximum
Income Taxes [Line Items]
Decrease in unrecognized tax benefits is reasonably possible		8.3
Domestic Tax Authority
Income Taxes [Line Items]
Net operating losses		22.5
Credit carry forwards		4.6
State and Local Jurisdiction
Income Taxes [Line Items]
Net operating losses		172.1
Credit carry forwards		2.1
Foreign Tax Authority
Income Taxes [Line Items]
Income tax benefit	$ 107.2
Net operating losses		275.2
Foreign Tax Authority | Costa Rica
Income Taxes [Line Items]
Income tax savings		$ 79.8	$ 45.5
Diluted (in dollars per share)		$ 0.34	$ 0.18