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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Debt - Additional Information (Detail) $ in Millions, ¥ in Billions, AUD in Billions	3 Months Ended		9 Months Ended
	Jun. 25, 2016 USD ($)	Jun. 27, 2015 USD ($)	Jun. 25, 2016 USD ($)	Jun. 27, 2015 USD ($)	Jun. 25, 2016 JPY (¥)	Jun. 25, 2016 AUD	Mar. 26, 2016 USD ($)	Sep. 26, 2015 USD ($)
Debt Instrument [Line Items]
Commercial paper	$ 12,496		$ 12,496					$ 8,499
Commercial paper, weighted-average interest rate	0.42%		0.42%		0.42%	0.42%		0.14%
Debt instrument aggregate principal amount	$ 71,565		$ 71,565					$ 55,701
Interest expense	393	$ 197	975	$ 486
Level 2
Debt Instrument [Line Items]
Debt instrument fair value	74,100		74,100					54,900
Currency Swaps
Debt Instrument [Line Items]
Derivative, notional amount	1,000		1,000				$ 5,000
Third quarter 2016 debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount	1,400		1,400
Third quarter 2016 Australian dollar denominated debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount \| AUD						AUD 1.4
Second quarter 2016 debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount	15,500		15,500				$ 15,500
Third quarter 2015 yen-denominated debt issuance \| Net investment hedges
Debt Instrument [Line Items]
Debt instrument, face amount \| ¥					¥ 191.0
Debt instrument, senior notes	$ 1,800		$ 1,800					$ 2,100
Maximum
Debt Instrument [Line Items]
Commercial paper, maturity period			9 months