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Equity-Based Compensation - Additional Information (Detail) (USD $)
In Millions, except Per Share data, unless otherwise specified
1 Months Ended 12 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Sep. 28, 2013
Sep. 29, 2012
Oct. 01, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Increase in number of shares authorized to be awarded as grants 15 64      
Restricted stock units granted, number of shares     7.0 [1]    
Restricted stock units granted, unvested number of shares     21.0 [2] 27.0  
Weighted average grant-date fair values of options granted     $ 12.38 $ 10.65 $ 10.96
Stock options exercised and RSUs vested, total intrinsic value     $ 1,162 $ 1,033 $ 969
Aggregate intrinsic values of stock options vested     635    
Aggregate intrinsic values of stock options expected to vest     459    
Cash received from option exercises     587 1,008 1,128
Tax benefits realized from tax deductions associated with option exercises and RSU activity     398 360 342
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     113    
Unrecognized compensation costs     147    
Weighted-average period to recognize compensation costs     1 year 7 months 9 days    
Restricted Stock Units
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized to be awarded as grants     57    
Unrecognized compensation costs     $ 520    
Weighted-average period to recognize compensation costs     1 year 7 months 9 days    
Performance Based Restricted Stock
         
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Restricted stock units granted, number of shares     0.4    
Restricted stock units granted, unvested number of shares     1.3    
[1] RSU grants include 0.4 million shares of Performance RSUs.
[2] 1.3 million of the unvested RSUs are Performance RSUs.