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Income Taxes (Activity Related To Gross Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 27, 2025
Sep. 28, 2024
Sep. 30, 2023
Oct. 01, 2022
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]        
Federal Income Tax Rate 21.00% 21.00% 21.00%  
State Income Taxes 4.70% 3.40% (0.70%)  
Effective Income Tax Reconciliation, Remeasurement of Deferred Income Taxes 0.00% (0.90%) 3.80%  
Effective Income Tax Rate Reconciliation, Tax Credit, Amount (2.10%) (1.90%) 3.40%  
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Percent (1.30%) (1.70%) 1.30%  
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent 1.90% 1.10% (0.60%)  
Goodwill (9.40%) (1.20%) 24.20%  
Other 1.10% 1.60% (0.30%)  
Effective Income Tax Rate 34.10% 24.80% 4.30%  
Unrecognized tax benefits $ 168 $ 151 $ 131 $ 152
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions 19 22 7  
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions 9 12 1  
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions (4) (2) (12)  
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities (1) 0 0  
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations $ (6) $ (12) $ (17)