Leases (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Apr. 02, 2022	Apr. 02, 2022	Apr. 03, 2021	Oct. 02, 2021
Operating Leases [Abstract]
Operating lease right-of-use assets	$ 536	$ 536		$ 562
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Operating lease right-of-use assets	Operating lease right-of-use assets		Operating lease right-of-use assets
Current operating lease liabilities	$ 110	$ 110		$ 113
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Liabilities, Current	Other Liabilities, Current		Other Liabilities, Current
Noncurrent operating lease liabilities	$ 443	$ 443		$ 466
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Noncurrent operating lease liabilities	Noncurrent operating lease liabilities		Noncurrent operating lease liabilities
Finance Leases [Abstract]
Finance lease right-of-use assets	$ 47	$ 47		$ 57
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net		Property, Plant and Equipment, Net
Current finance lease liability	$ 13	$ 13		$ 14
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Long-term Debt and Lease Obligation, Current	Long-term Debt and Lease Obligation, Current		Long-term Debt and Lease Obligation, Current
Noncurrent finance lease liabilities	$ 30	$ 30		$ 38
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-term debt, less current portion	Long-term debt, less current portion		Long-term debt, less current portion
Lease Cash Flow and Lease Expense [Abstract]
Operating cash flows from operating leases		$ 62	$ 57
Operating cash flows from finance leases		1	1
Financing cash flows from finance leases		9	16
Amortization of right-of-use assets from finance leases		5	$ 7
Right-of-use assets obtained in exchange for operating lease liabilities	$ 9	$ 21