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Share-Based Employee Compensation (Schedule of Weighted-Average Assumptions) (Details) - Stock options - $ / shares
12 Months Ended
Sep. 27, 2020
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk-free interest rate 1.70% 2.40%
Expected dividends yield 2.10% 1.80%
Expected stock price volatility 28.10% 28.80%
Expected life of options (in years) 3 years 5 months 19 days 3 years 4 months 24 days
Weighted-average grant date fair value $ 13.97 $ 18.49