Summary of Long-Term Debt (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Jun. 27, 2015	Sep. 27, 2014
Debt Instrument [Line Items]
Total borrowings	$ 49,992	$ 29,000
Unamortized discount	(97)	(52)
Hedge accounting fair value adjustments	24	39
Less: Current portion of long-term debt	(2,500)	0
Total long-term debt	47,419	28,987
2013 debt issuance \| Floating-rate notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 3,000	$ 3,000
Debt instrument maturity year, start	2016	2016
Debt instrument maturity year, end	2018	2018
Debt instrument effective interest rate, minimum	0.51%	0.51%
Debt instrument effective interest rate, maximum	1.10%	1.10%
2013 debt issuance \| Fixed-rate 0.45% - 3.85% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 14,000	$ 14,000
Debt instrument maturity year, start	2016	2016
Debt instrument maturity year, end	2043	2043
Debt instrument effective interest rate, minimum	0.51%	0.51%
Debt instrument effective interest rate, maximum	3.91%	3.91%
2014 debt issuance \| Floating-rate notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 2,000	$ 2,000
Debt instrument maturity year, start	2017	2017
Debt instrument maturity year, end	2019	2019
Debt instrument effective interest rate, minimum	0.35%	0.31%
Debt instrument effective interest rate, maximum	0.58%	0.54%
2014 debt issuance \| Fixed-rate 1.05% - 4.45% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 10,000	$ 10,000
Debt instrument maturity year, start	2017	2017
Debt instrument maturity year, end	2044	2044
Debt instrument effective interest rate, minimum	0.34%	0.30%
Debt instrument effective interest rate, maximum	4.48%	4.48%
First quarter 2015 euro-denominated debt issuance \| Fixed-rate 1.00% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 1,567	$ 0
Debt instrument maturity year	2022	2022
Debt instrument effective interest rate	2.94%	0.00%
First quarter 2015 euro-denominated debt issuance \| Fixed-rate 1.63% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 1,567	$ 0
Debt instrument maturity year	2026	2026
Debt instrument effective interest rate	3.45%	0.00%
Second quarter 2015 debt issuance \| Floating-rate notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 500	$ 0
Debt instrument maturity year	2020	2020
Debt instrument effective interest rate	0.53%	0.00%
Second quarter 2015 debt issuance \| Fixed-rate 1.55% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 1,250	$ 0
Debt instrument maturity year	2020	2020
Debt instrument effective interest rate	0.53%	0.00%
Second quarter 2015 debt issuance \| Fixed-rate 2.15% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 1,250	$ 0
Debt instrument maturity year	2022	2022
Debt instrument effective interest rate	0.84%	0.00%
Second quarter 2015 debt issuance \| Fixed-rate 2.50% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 1,500	$ 0
Debt instrument maturity year	2025	2025
Debt instrument effective interest rate	2.60%	0.00%
Second quarter 2015 debt issuance \| Fixed-rate 3.45% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 2,000	$ 0
Debt instrument maturity year	2045	2045
Debt instrument effective interest rate	3.58%	0.00%
Second quarter 2015 Swiss franc-denominated debt issuance \| Fixed-rate 0.38% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 939	$ 0
Debt instrument maturity year	2024	2024
Debt instrument effective interest rate	0.28%	0.00%
Second quarter 2015 Swiss franc-denominated debt issuance \| Fixed-rate 0.75% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 403	$ 0
Debt instrument maturity year	2030	2030
Debt instrument effective interest rate	0.74%	0.00%
Third quarter 2015 debt issuance \| Floating-rate notes due 2017
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 250	$ 0
Debt instrument maturity year	2017	2017
Debt instrument effective interest rate	0.33%	0.00%
Third quarter 2015 debt issuance \| Floating-rate notes due 2020
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 500	$ 0
Debt instrument maturity year	2020	2020
Debt instrument effective interest rate	0.58%	0.00%
Third quarter 2015 debt issuance \| Fixed-rate 0.90% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 750	$ 0
Debt instrument maturity year	2017	2017
Debt instrument effective interest rate	0.32%	0.00%
Third quarter 2015 debt issuance \| Fixed-rate 2.00% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 1,250	$ 0
Debt instrument maturity year	2020	2020
Debt instrument effective interest rate	0.57%	0.00%
Third quarter 2015 debt issuance \| Fixed-rate 2.70% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 1,250	$ 0
Debt instrument maturity year	2022	2022
Debt instrument effective interest rate	0.95%	0.00%
Third quarter 2015 debt issuance \| Fixed-rate 3.20% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 2,000	$ 0
Debt instrument maturity year	2025	2025
Debt instrument effective interest rate	1.18%	0.00%
Third quarter 2015 debt issuance \| Fixed-rate 4.38% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 2,000	$ 0
Debt instrument maturity year	2045	2045
Debt instrument effective interest rate	4.40%	0.00%
Third quarter 2015 yen-denominated debt issuance \| Fixed-rate 0.35% notes
Debt Instrument [Line Items]
Debt instrument, senior notes	$ 2,016	$ 0
Debt instrument maturity year	2020	2020
Debt instrument effective interest rate	0.35%	0.00%

Year when the debt instrument is scheduled to be fully repaid.

No definition available.

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- Definition

Latest year the outstanding debt instruments are required to be repaid.

+ References

No definition available.

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- Definition

Earliest year the outstanding debt instruments are required to be repaid.

+ References

No definition available.

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- Definition

Amount as of the balance sheet date of the adjustment to the carrying value of an interest bearing hedged item made under an interest rate fair value hedge.

+ References

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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- Definition

When presenting a range of interest rates, the highest effective rate for funds borrowed under the debt agreement as of the balance sheet date.

+ References

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- Definition

When presenting a range of interest rates, the lowest effective rate for funds borrowed under the debt agreement as of the balance sheet date.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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-SubTopic 30

-Section 55

-Paragraph 8

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- Definition

Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

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-Name Accounting Standards Codification

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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