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Stock-Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Sep. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for future grant 24,293,913    
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Expiration period 10 years    
Grant-date fair value of options granted $ 11.51 $ 10.83 $ 6.44
Stock-based compensation expense, net of income taxes $ 27 $ 20 $ 14
Related tax benefit $ 17 $ 13 $ 9
Options vested (in shares) 3,800,000 4,800,000 3,900,000
Grant date fair value of options vested $ 32 $ 30 $ 22
Cash received from exercise of stock options 84 67 123
Tax benefit related to stock options exercised 30 33 35
Total intrinsic value of options exercised 79 87 90
Amount realized, related to excess tax deductions 19 24 18
Total unrecognized compensation cost related to stock option plans $ 45    
Total unrecognized compensation cost, time frame for recognition, weighted average number of years 1 year 5 months    
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense, net of income taxes $ 9 6 5
Related tax benefit $ 6 $ 4 $ 3
Number of Shares - Vested (520,964) (600,000) (1,400,000)
Total unrecognized compensation cost, time frame for recognition, weighted average number of years 2 years 1 month    
Total unrecognized compensation cost related to share-based awards other than options $ 24    
Restricted stock awards, grant date fair value of shares vested $ 10 $ 11 $ 20
Performance Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Stock-based compensation expense, net of income taxes $ 5 4 2
Related tax benefit $ 3 $ 2 $ 2
Number of Shares - Vested (25,922)    
Total unrecognized compensation cost, time frame for recognition, weighted average number of years 1 year 8 months    
Total unrecognized compensation cost related to share-based awards other than options $ 11    
Performance Shares [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting rights, performance criteria 0.00%    
Performance Shares [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting rights, performance criteria 200.00%