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Debt - Additional Information (Detail) £ in Millions, AUD in Millions, $ in Millions, € in Billions, ¥ in Billions	12 Months Ended
	Sep. 26, 2015 USD ($)	Sep. 27, 2014 USD ($)	Sep. 28, 2013 USD ($)	Sep. 26, 2015 JPY (¥)	Sep. 26, 2015 EUR (€)	Sep. 26, 2015 GBP (£)	Sep. 26, 2015 AUD	Jun. 27, 2015 USD ($)	Mar. 28, 2015 USD ($)	Dec. 27, 2014 USD ($)
Debt Instrument [Line Items]
Commercial paper	$ 8,499	$ 6,308
Debt instrument aggregate principal amount	55,701	29,000
Interest expense	722	$ 381	$ 136
First quarter 2015 euro-denominated debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount | €					€ 2.8
Fourth quarter 2015 British pound-denominated debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount | £						£ 1,250
Fourth quarter 2015 Australian dollar-denominated debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount | AUD							AUD 2,250
Fourth quarter 2015 euro-denominated debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount | €					€ 2.0
Second quarter 2015 debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount	6,500
Third quarter 2015 debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount	8,000
Third quarter 2015 Japanese yen-denominated debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount | ¥				¥ 250.0
Net investment hedges | Third quarter 2015 Japanese yen-denominated debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount | ¥				¥ 250.0
Debt instrument, senior notes	2,100
Currency Swaps | First quarter 2015 euro-denominated debt issuance
Debt Instrument [Line Items]
Notional Amount										$ 3,500
Currency Swaps | Fourth quarter 2015 British pound-denominated debt issuance
Debt Instrument [Line Items]
Notional Amount	1,900
Currency Swaps | Fourth quarter 2015 Australian dollar-denominated debt issuance
Debt Instrument [Line Items]
Notional Amount	1,600
Currency Swaps | Fourth quarter 2015 euro-denominated debt issuance
Debt Instrument [Line Items]
Notional Amount	$ 2,200
Interest Rate Swaps | Second quarter 2015 debt issuance
Debt Instrument [Line Items]
Notional Amount									$ 2,500
Interest Rate Swaps | Third quarter 2015 debt issuance
Debt Instrument [Line Items]
Notional Amount								$ 4,300
Commercial paper
Debt Instrument [Line Items]
Commercial paper, weighted-average interest rate	0.14%	0.12%		0.14%	0.14%	0.14%	0.14%
Commercial paper | Maximum
Debt Instrument [Line Items]
Commercial paper, maturity period	9 months
Level 2
Debt Instrument [Line Items]
Debt instrument fair value	$ 54,900	$ 28,500

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Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

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