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Share-Based Employee Compensation (Summary Of Stock Equivalent Activity) (Details)
12 Months Ended
Sep. 30, 2018
$ / shares
shares
Oct. 02, 2016
shares
Sep. 27, 2015
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
Stock Issued During Period, Shares, Employee Stock Purchase Plans   0  
Deferred Compensation for Non Management Directors [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 0    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Stock awards outstanding, Beginning balance, Shares 88,515    
Deferred Directors' Compensation in Current Period, Shares 3,953    
Stock awards outstanding, Ending balance, Shares 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 (usd per share) | $ / shares $ 32.85    
Deferred directors' compensation, Weighted-Average Grant Date Fair Value | $ / shares 88.53    
Stock awards outstanding, Weighted-Average Grant Date Fair Value, Ending balance (usd per share) | $ / shares $ 36.35    
Deferred Compensation For Non Management Directors Member      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Shares issued under stock plans including tax benefit 1,922    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]      
Stock distribution weighted average grant date fair value | $ / shares 90.01