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Pensions And Other Postretirement Benefits (Reconciliation Of Changes In Plans' Benefit Obligations, Assets And Funded Status) (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 28, 2024
Sep. 30, 2023
Oct. 01, 2022
Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 14 $ 13 $ 13
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation 34 50 55
Defined Benefit Plan, Plan Assets, Amount 0 0 0
Defined Benefit Plan, Funded (Unfunded) Status of Plan, Total (34) (50)  
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 0 0  
Defined Benefit Plan, Plan Assets, Contributions by Employer 3 3  
Defined Benefit Plan, Service Cost 2 2 1
Defined Benefit Plan, Interest Cost 1 1 1
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment (16) 0  
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) 0 (5)  
Defined Benefit Plan, Benefit Obligation, Benefits Paid (3) (3)  
Defined Benefit Plan, Plan Assets, Benefits Paid (3) (3)  
Defined Benefit Plan, Funded Plan | Qualified Plan | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation 21 18 17
Defined Benefit Plan, Plan Assets, Amount 30 27 24
Defined Benefit Plan, Funded (Unfunded) Status of Plan, Total 9 9  
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 4 4  
Defined Benefit Plan, Plan Assets, Contributions by Employer 0 0  
Defined Benefit Plan, Service Cost 0 0 0
Defined Benefit Plan, Interest Cost 1 1 1
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment 0 0  
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) 3 1  
Defined Benefit Plan, Benefit Obligation, Benefits Paid (1) (1)  
Defined Benefit Plan, Plan Assets, Benefits Paid (1) (1)  
Defined Benefit Plan, Unfunded Plan | Nonqualified Plan | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation 167 158 166
Defined Benefit Plan, Plan Assets, Amount 0 0 0
Defined Benefit Plan, Funded (Unfunded) Status of Plan, Total (167) (158)  
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 0 0  
Defined Benefit Plan, Plan Assets, Contributions by Employer 14 13  
Defined Benefit Plan, Service Cost 0 0 0
Defined Benefit Plan, Interest Cost 9 8 $ 6
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment 0 0  
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) 14 (3)  
Defined Benefit Plan, Benefit Obligation, Benefits Paid (14) (13)  
Defined Benefit Plan, Plan Assets, Benefits Paid $ (14) $ (13)