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Income Taxes (Activity Related To Gross Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2023
Oct. 01, 2022
Oct. 02, 2021
Oct. 03, 2020
Income Tax Disclosure [Abstract]        
Unrecognized tax benefits $ 131 $ 152 $ 152 $ 165
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions 7 16 25  
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions 1 20 7  
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions (12) (13) (7)  
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities 0 (3) (1)  
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations $ (17) $ (20) $ (37)