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Pensions And Other Postretirement Benefits (Amounts Recognized In The Consolidated Balance Sheets) (Details) - USD ($)
$ in Millions
Sep. 27, 2025
Sep. 28, 2024
Other Postretirement Benefits Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Assets for Plan Benefits, Defined Benefit Plan $ 0 $ 0
Liability, Defined Benefit Plan, Current (8) (7)
Liability, Defined Benefit Plan, Noncurrent (23) (27)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position (31) (34)
Defined Benefit Plan, Funded Plan | Qualified Plan | Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Assets for Plan Benefits, Defined Benefit Plan 10 9
Liability, Defined Benefit Plan, Current 0 0
Liability, Defined Benefit Plan, Noncurrent 0 0
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position 10 9
Defined Benefit Plan, Unfunded Plan | Nonqualified Plan | Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Assets for Plan Benefits, Defined Benefit Plan 0 0
Liability, Defined Benefit Plan, Current (14) (14)
Liability, Defined Benefit Plan, Noncurrent (142) (153)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position $ (156) $ (167)