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Stock-Based Compensation (Summary Of Stock Options) (Details) - Stock Options [Member] - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Oct. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Shares Under Option - Outstanding, September 30, 2017 7,547,518    
Shares Under Option - Exercised (2,615,963)    
Shares Under Option - Forfeited or expired (120,897)    
Shares Under Option - Granted 1,183,490    
Shares Under Option - Outstanding, September 29, 2018 5,994,148 7,547,518  
Weighted Average Exercise Price Per Share - Outstanding, September 30, 2017 $ 40.54    
Weighted Average Exercise Price Per Share - Exercised 38.67    
Weighted Average Exercise Price Per Share - Forfeited or expired 60.80    
Weighted Average Exercise Price Per Share - Granted 78.16    
Weighted Average Exercise Price Per Share - Outstanding, September 29, 2018 $ 48.37 $ 40.54  
Weighted Average Remaining Contractual Life (in Years) - Outstanding, September 29, 2018 6 years 8 months    
Aggregate Intrinsic Value - Outstanding, September 29, 2018 $ 88    
Shares Under Option - Exercisable, September 29, 2018 3,793,715    
Weighted Average Exercise Price Per Share - Exercisable at September 29, 2018 $ 37.63    
Weighted Average Remaining Contractual Life (in Years) - Exercisable, September 29, 2018 5 years 7 months    
Aggregate Intrinsic Value - Exercisable, September 29, 2018 $ 84    
Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 1.50% 1.40% 2.60%