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Equity-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Oct. 03, 2020
Sep. 28, 2019
Sep. 29, 2018
Mar. 20, 2019
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] 6.0      
Restricted stock units granted, unvested number of shares 12.0 [2],[3] 12.0    
Weighted average grant-date fair values of options granted $ 36.19 $ 28.76 $ 28.01  
Stock options exercised and RSUs vested, total intrinsic value $ 989 $ 646 $ 585  
Aggregate intrinsic values of stock options vested 514      
Proceeds from exercise of stock options 305 318 210  
Tax benefits realized from tax deductions associated with option exercises and RSU activity 220 $ 145 $ 160  
Expected to Vest        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Aggregate intrinsic values of stock options vested $ 63      
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 160.0      
Unrecognized compensation costs $ 140      
Weighted-average period to recognize compensation costs 1 year 7 months 6 days      
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 77.0      
Unrecognized compensation costs $ 850      
Weighted-average period to recognize compensation costs 1 year 10 months 24 days      
Restricted Stock Units | TFCF        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation costs       $ 219
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 1.4      
Performance Shares, Vesting Subject to CEO Discretion        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Restricted stock units granted, number of shares 0.1      
[1] Includes 0.2 million Performance RSUs.
[2] Excludes Performance RSUs issued in September 2018 and December 2019, for which vesting is subject to service conditions and the number of units vesting is subject to the discretion of the CEO. At October 3, 2020, the maximum number of these Performance RSUs that could be issued upon vesting is 0.1 million.
[3] Includes 1.4 million Performance RSUs.