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Pensions And Other Postretirement Benefits (Amounts Recognized in Other Comprehensive Income) (Details) - USD ($)
$ in Millions
Sep. 27, 2025
Sep. 28, 2024
Other Postretirement Benefits Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax $ 0 $ 4
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax 0 (4)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax 0 0
Qualified Plan | Defined Benefit Plan, Funded Plan | Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax 1 2
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax 0 0
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax 1 2
Nonqualified Plan | Defined Benefit Plan, Unfunded Plan | Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax (3) 1
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax 0 0
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax $ (3) $ 1