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Goodwill And Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization expense on intangible assets $ 267 $ 210 $ 107
Estimated amortization expense on intangible assets, 2019 276    
Estimated amortization expense on intangible assets, 2020 258    
Estimated amortization expense on intangible assets, 2021 244    
Estimated amortization expense on intangible assets, 2022 225    
Estimated amortization expense on intangible assets, 2023 $ 221