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Share-Based Employee Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Sep. 30, 2018
Oct. 01, 2017
Oct. 02, 2016
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost related to stock options granted $ 6.8    
Weighted-average period for unrecognized compensation cost, (in years) 2 years 4 months 24 days    
Weighted-average grant-date fair value of RSUs granted (usd per share) $ 94.93 $ 102.42 $ 72.06
Total fair value of awards vested $ 4.4 $ 4.4 $ 4.5
Awards outstanding 288,098 304,232  
Performance share awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Total unrecognized compensation cost related to stock options granted $ 0.8    
Weighted-average period for unrecognized compensation cost, (in years) 1 year 3 months    
Weighted-average grant-date fair value of options granted (usd per share)   $ 95.33 $ 75.25
Weighted-average grant-date fair value of RSUs granted (usd per share) $ 97.02    
Total fair value of awards vested $ 1.6 $ 3.2 $ 3.5
Awards outstanding 52,479.000 92,135  
Nonvested stock awards and units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Total unrecognized compensation cost related to stock options granted $ 1.6    
Weighted-average period for unrecognized compensation cost, (in years) 1 year 7 months 6 days    
Weighted-average grant-date fair value of options granted (usd per share) $ 18.49 $ 20.92 $ 16.21
Total intrinsic value of stock options exercised $ 2.3 $ 6.9 $ 18.6
Nonvested Stock Awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards outstanding 33,243    
Deferred Compensation for Non Management Directors [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards outstanding 94,390 88,515  
Minimum [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 4 years    
Restricted stock units vested, percentage 50.00%    
Minimum [Member] | Performance share awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 0.00%    
Maximum [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 5 years    
Restricted stock units vested, percentage 100.00%    
Maximum [Member] | Performance share awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 150.00%    
Management [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Awards outstanding 46,899    
Non-Management Directors [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 12 months    
Awards outstanding 59,386    
Two Thousand Four Stock Incentive Plan Member      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized 11,600,000    
Shares of common stock available for future issuance 1,880,708    
Deferred Compensation Plan for Non-Management Directors [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized 350,000    
Shares of common stock available for future issuance 143,122    
Prior to fiscal 2011 [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards outstanding 60,272    
Since fiscal 2011 [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards outstanding 121,541