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Share-Based Employee Compensation (Summary of Stock Equivalent Activity) (Details)
12 Months Ended
Sep. 29, 2019
$ / shares
shares
Sep. 30, 2018
$ / shares
shares
Oct. 01, 2017
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Deferred Compensation Arrangement with Individual, Common Stock Reserved for Future Issuance 0 0 0
Deferred Compensation for Non Management Directors      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Stock awards outstanding, Beginning balance, Shares 94,390    
Deferred directors’ compensation, Shares 3,277    
Stock awards outstanding, Ending balance, Shares 100,005 94,390  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Stock awards outstanding, Weighted-Average Grant Date Fair Value, Beginning balance (in usd per share) | $ / shares $ 36.35    
Deferred directors' compensation, Weighted-Average Grant Date Fair Value (in usd per share) | $ / shares 79.95    
Stock awards outstanding, Weighted-Average Grant Date Fair Value, Ending balance (in usd per share) | $ / shares $ 38.87 $ 36.35  
Deferred Compensation for Non Management Directors      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Dividend equivalents, Shares 2,338    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Dividend equivalents, Weighted- Average Grant Date Fair Value (in usd per share) | $ / shares 82.87