Leases - Lease Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 28, 2025	Sep. 28, 2024
Leases [Abstract]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Operating lease right-of-use assets	Operating lease right-of-use assets
Operating lease right-of-use assets	$ 65	$ 49
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses	Accrued expenses
Current operating lease liabilities	$ 19	$ 11
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Noncurrent operating lease liabilities	Noncurrent operating lease liabilities
Noncurrent operating lease liabilities	$ 48	$ 39
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, plant and equipment	Property, plant and equipment
Finance lease right-of-use assets	$ 0	$ 6