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Goodwill And Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Oct. 01, 2016
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization expense on intangible assets $ 210 $ 107 $ 80
Estimated amortization expense on intangible assets, 2019 241    
Estimated amortization expense on intangible assets, 2020 240    
Estimated amortization expense on intangible assets, 2021 222    
Estimated amortization expense on intangible assets, 2022 212    
Estimated amortization expense on intangible assets, 2023 $ 201