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Debt - Additional Information (Detail) $ in Millions, ¥ in Billions	3 Months Ended		9 Months Ended
	Jun. 27, 2015 USD ($)	Jun. 28, 2014 USD ($)	Jun. 27, 2015 USD ($)	Jun. 28, 2014 USD ($)	Jun. 27, 2015 JPY (¥)	Mar. 28, 2015 USD ($)	Dec. 27, 2014 USD ($)	Sep. 27, 2014 USD ($)
Debt Instrument [Line Items]
Commercial paper	$ 4,499		$ 4,499					$ 6,308
Commercial paper, weighted-average interest rate	0.10%		0.10%		0.10%			0.12%
Debt instrument aggregate principal amount	$ 49,992		$ 49,992					$ 29,000
Interest expense	197	$ 100	486	$ 268
Third quarter 2015 yen-denominated debt issuance
Debt Instrument [Line Items]
Debt instrument, face amount | ¥					¥ 250.0
Third quarter 2015 yen-denominated debt issuance | Net investment hedges
Debt Instrument [Line Items]
Debt instrument, face amount | ¥					¥ 212.4
Third quarter 2015 yen-denominated debt issuance | Fixed-rate 0.35% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	2,016		2,016					0
Third quarter 2015 yen-denominated debt issuance | Fixed-rate 0.35% notes | Net investment hedges
Debt Instrument [Line Items]
Debt instrument, senior notes	1,700		1,700
Currency Swaps
Debt Instrument [Line Items]
Notional Amount							$ 3,500
Interest Rate Swaps
Debt Instrument [Line Items]
Notional Amount	4,300		$ 4,300			$ 2,500
Maximum
Debt Instrument [Line Items]
Commercial paper, maturity period			9 months
Level 2
Debt Instrument [Line Items]
Debt instrument fair value	$ 48,700		$ 48,700					$ 28,500

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

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