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Pensions And Other Postretirement Benefits (Plans With Accumulated Benefit Obligations In Excess Of Plan Assets) (Details) - Pension Plan [Member]
$ in Millions
 12 Months Ended
Sep. 27, 2025
USD ($)
plan
Sep. 28, 2024
USD ($)
plan
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Number of Plans | plan 3 3
Defined Benefit Plan, Funded Plan | Qualified Plan    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation $ 0 $ 0
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation 0 0
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets 0 0
Defined Benefit Plan, Unfunded Plan | Nonqualified Plan    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation 156 167
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation 156 167
Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets $ 0 $ 0