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Stock-Based Compensation (Narrative) (Details) - $ / shares
9 Months Ended 12 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Oct. 01, 2016
Sep. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options granted (in shares) 288,000 316,000    
Stock options vesting period 3 years      
Weighted average per share fair value of the stock options granted (in dollars per share) $ 8.91 $ 11.71    
Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options expiration period 5 years      
Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options expiration period 7 years      
Restricted stock units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted issued (in shares) 118,000 74,000    
Weighted average per share fair value of the stock options granted (in dollars per share) $ 45.00 $ 57.73    
Employee stock option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted issued (in shares) 35,000      
Performance shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Weighted average per share fair value of the stock options granted (in dollars per share) $ 45.00 $ 57.73    
2011 Stock incentive plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Increase in shares issued (in shares)     1,500,000  
Shares available for grant (in shares) 0      
Aggregate number of shares reserved for issuance (in shares)     3,800,000  
2017 Stock incentive plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant (in shares) 1,513,000      
Aggregate number of shares reserved for issuance (in shares) 1,500,000      
Expiration date Jun. 06, 2027      
2012 Employee stock purchase plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant (in shares) 639,000      
Expiration date Dec. 31, 2021      
Officers and employees | Employee stock option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted issued (in shares)   21,000    
Directors | Restricted stock units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting period 1 year     3 years
Stock option vesting description vest one year from the date of the grant, provided the director continues to serve on the Board of Directors      
Key employees | Restricted stock units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting period 3 years      
Key employees | Performance shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option vesting description based on attainment of return on invested capital performance targets at the end of one, two and three year performance periods