Income Taxes - Summary of Valuation Allowance (Details) - USD ($) $ in Billions	12 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Oct. 02, 2021
Valuation Allowance [Line Items]
Roll Forward, Deferred Tax Assets, Valuation Allowance	$ 2.9	$ 2.8	$ 2.4
Charges to Tax Expense	0.2	0.4	0.4
Other Changes	0.1	(0.3)	0.0
Roll Forward, Deferred Tax Assets, Valuation Allowance	$ 3.2	$ 2.9	$ 2.8