Income Taxes - Summary of Valuation Allowance (Details) - USD ($) $ in Billions	12 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Oct. 01, 2022
Valuation Allowance [Line Items]
Roll Forward, Deferred Tax Assets, Valuation Allowance	$ 3.2	$ 2.9	$ 2.8
Increases (Decreases) to Tax Expense	(0.3)	0.2	0.4
Other Changes	0.1	0.1	(0.3)
Roll Forward, Deferred Tax Assets, Valuation Allowance	$ 3.0	$ 3.2	$ 2.9