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Long-Term Debt - Additional Information (Detail) (USD $)
12 Months Ended
Sep. 28, 2013
Debt Disclosure [Line Items]  
Debt instrument aggregate principal amount $ 17,000,000,000
Interest expense 136,000,000
Aggregate unamortized discount 40,000,000
Floating-rate notes, due 2016
 
Debt Disclosure [Line Items]  
Debt instrument maturity year 2016
Debt instrument LIBOR rate 0.05%
Floating-rate notes, due 2018
 
Debt Disclosure [Line Items]  
Debt instrument maturity year 2018
Debt instrument LIBOR rate 0.25%
Cash flow hedges | Interest Rate Swap
 
Debt Disclosure [Line Items]  
Notional amount 3,000,000,000
Level 2
 
Debt Disclosure [Line Items]  
Debt instrument fair value $ 15,900,000,000