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Equity-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Oct. 01, 2016
Oct. 03, 2015
Sep. 27, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 10 years    
Restricted stock units granted, number of shares [1] 4.0    
Restricted stock units granted, unvested number of shares 10.0 [2] 12.0  
Weighted average grant-date fair values of options granted $ 30.93 $ 22.65 $ 19.21
Stock options exercised and RSUs vested, total intrinsic value $ 981 $ 1,332 $ 1,257
Aggregate intrinsic values of stock options vested 603    
Cash received from option exercises 259 329 404
Tax benefits realized from tax deductions associated with option exercises and RSU activity 342 $ 457 $ 431
Expected to Vest      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Aggregate intrinsic values of stock options vested $ 127    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum extension period of stock options after grant date 15 years    
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Ratable vesting term of stock options from grant date 4 years    
Number of shares authorized to be awarded as grants 77.0    
Unrecognized compensation costs $ 129    
Weighted-average period to recognize compensation costs 1 year 9 months    
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Ratable vesting term of stock options from grant date 4 years    
Number of shares authorized to be awarded as grants 39.0    
Unrecognized compensation costs $ 469    
Weighted-average period to recognize compensation costs 1 year 7 months    
Performance Based Restricted Stock      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Ratable vesting term of stock options from grant date 3 years    
Restricted stock units granted, number of shares 0.2    
Restricted stock units granted, unvested number of shares 0.7    
[1] Includes 0.2 million Performance RSUs.
[2] Includes 0.7 million Performance RSUs.