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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. 30, 2023
Oct. 01, 2022
Oct. 02, 2021
Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Plan Assets, Contributions by Employer $ 13 $ 13 $ 15
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation 50 55 65
Defined Benefit Plan, Plan Assets, Amount 0 0 0
Defined Benefit Plan, Funded (Unfunded) Status of Plan (50) (55)  
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 0 0  
Defined Benefit Plan, Plan Assets, Contributions by Employer 3 4  
Defined Benefit Plan, Service Cost 2 1 2
Defined Benefit Plan, Interest Cost 1 1 1
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) (5) (8)  
Defined Benefit Plan, Benefit Obligation, Benefits Paid (3) (4)  
Defined Benefit Plan, Plan Assets, Benefits Paid (3) (4)  
Defined Benefit Plan, Funded Plan | Qualified Plan | Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation 18 17 28
Defined Benefit Plan, Plan Assets, Amount 27 24 33
Defined Benefit Plan, Funded (Unfunded) Status of Plan 9 7  
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 4 (9)  
Defined Benefit Plan, Plan Assets, Contributions by Employer 0 1  
Defined Benefit Plan, Service Cost 0 0 0
Defined Benefit Plan, Interest Cost 1 1 0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) 1 (11)  
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 158 166 220
Defined Benefit Plan, Plan Assets, Amount 0 0 0
Defined Benefit Plan, Funded (Unfunded) Status of Plan (158) (166)  
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) 0 0  
Defined Benefit Plan, Plan Assets, Contributions by Employer 13 13  
Defined Benefit Plan, Service Cost 0 0 0
Defined Benefit Plan, Interest Cost 8 6 $ 6
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) (3) (47)  
Defined Benefit Plan, Benefit Obligation, Benefits Paid (13) (13)  
Defined Benefit Plan, Plan Assets, Benefits Paid $ (13) $ (13)