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Goodwill And Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Oct. 03, 2015
Finite-Lived Intangible Assets, Net [Abstract]      
Amortization expense on intangible assets $ 107 $ 80 $ 92
Estimated amortization expense on intangible assets, 2018 194    
Estimated amortization expense on intangible assets, 2019 189    
Estimated amortization expense on intangible assets, 2020 185    
Estimated amortization expense on intangible assets, 2021 170    
Estimated amortization expense on intangible assets, 2022 $ 160