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Debt - Summary of Term Debt (Detail) | 12 Months Ended |
--- | --- | ---
Sep. 24, 2016 USD ($) | Sep. 26, 2015 USD ($) | Sep. 24, 2016 AUD
Debt Instrument [Line Items] |  |  |
Total term debt | $ 78,384,000,000 | $ 55,701,000,000 |
Unamortized premium/(discount) and issuance costs, net | (174,000,000) | (248,000,000) |
Hedge accounting fair value adjustments | 717,000,000 | 376,000,000 |
Less: Current portion of long-term debt | (3,500,000,000) | (2,500,000,000) |
Total long-term debt | 75,427,000,000 | 53,329,000,000 |
2013 debt issuance |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, face amount | 17,000,000,000 |  |
2013 debt issuance | Floating-rate notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, senior notes | $ 2,000,000,000 | $ 3,000,000,000 |
Debt instrument maturity year, start | 2018 |  |
Debt instrument maturity year, end | 2018 |  |
Debt instrument effective interest rate, minimum | 1.10% | 0.51% |
Debt instrument effective interest rate, maximum | 1.10% | 1.10% |
2013 debt issuance | Fixed-rate 1.000% - 3.850% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, senior notes | $ 12,500,000,000 | $ 14,000,000,000 |
Debt instrument maturity year, start | 2018 |  |
Debt instrument maturity year, end | 2043 |  |
Debt instrument effective interest rate, minimum | 1.08% | 0.51% |
Debt instrument effective interest rate, maximum | 3.91% | 3.91% |
Debt instrument interest rate, minimum | 1.00% |  |
Debt instrument interest rate, maximum | 3.85% |  |
2014 debt issuance |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, face amount | $ 12,000,000,000 |  |
2014 debt issuance | Floating-rate notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, senior notes | $ 2,000,000,000 | $ 2,000,000,000 |
Debt instrument maturity year, start | 2017 |  |
Debt instrument maturity year, end | 2019 |  |
Debt instrument effective interest rate, minimum | 0.86% | 0.37% |
Debt instrument effective interest rate, maximum | 1.09% | 0.60% |
2014 debt issuance | Fixed-rate 1.050% - 4.450% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, senior notes | $ 10,000,000,000 | $ 10,000,000,000 |
Debt instrument maturity year, start | 2017 |  |
Debt instrument maturity year, end | 2044 |  |
Debt instrument effective interest rate, minimum | 0.85% | 0.37% |
Debt instrument effective interest rate, maximum | 4.48% | 4.48% |
Debt instrument interest rate, minimum | 1.05% |  |
Debt instrument interest rate, maximum | 4.45% |  |
2015 debt issuance |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, face amount | $ 27,300,000,000 |  |
2015 debt issuance | Floating-rate notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, senior notes | $ 1,781,000,000 | $ 1,743,000,000 |
Debt instrument maturity year, start | 2017 |  |
Debt instrument maturity year, end | 2020 |  |
Debt instrument effective interest rate, minimum | 0.87% | 0.36% |
Debt instrument effective interest rate, maximum | 1.87% | 1.87% |
2015 debt issuance | Fixed-rate 0.350% - 4.375% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, senior notes | $ 25,144,000,000 | $ 24,958,000,000 |
Debt instrument maturity year, start | 2017 |  |
Debt instrument maturity year, end | 2045 |  |
Debt instrument effective interest rate, minimum | 0.28% | 0.28% |
Debt instrument effective interest rate, maximum | 4.51% | 4.51% |
Debt instrument interest rate, minimum | 0.35% |  |
Debt instrument interest rate, maximum | 4.375% |  |
Second quarter 2016 debt issuance |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, face amount | $ 15,500,000,000 |  |
Second quarter 2016 debt issuance | Floating Rate Notes Due 2019 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2019 |  |
Debt instrument, senior notes | $ 500,000,000 |  |
Debt instrument effective interest rate | 1.64% |  | 1.64%
Second quarter 2016 debt issuance | Floating Rate Notes Due 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2021 |  |
Debt instrument, senior notes | $ 500,000,000 |  |
Debt instrument effective interest rate | 1.95% |  | 1.95%
Second quarter 2016 debt issuance | Fixed-rate 1.300% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2018 |  |
Debt instrument, senior notes | $ 500,000,000 |  |
Debt instrument effective interest rate | 1.32% |  | 1.32%
Debt instrument interest rate | 1.30% |  | 1.30%
Second quarter 2016 debt issuance | Fixed-rate 1.700% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2019 |  |
Debt instrument, senior notes | $ 1,000,000,000 |  |
Debt instrument effective interest rate | 1.71% |  | 1.71%
Debt instrument interest rate | 1.70% |  | 1.70%
Second quarter 2016 debt issuance | Fixed-rate 2.250% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2021 |  |
Debt instrument, senior notes | $ 3,000,000,000 |  |
Debt instrument effective interest rate | 1.91% |  | 1.91%
Debt instrument interest rate | 2.25% |  | 2.25%
Second quarter 2016 debt issuance | Fixed-rate 2.850% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2023 |  |
Debt instrument, senior notes | $ 1,500,000,000 |  |
Debt instrument effective interest rate | 2.58% |  | 2.58%
Debt instrument interest rate | 2.85% |  | 2.85%
Second quarter 2016 debt issuance | Fixed-rate 3.250% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2026 |  |
Debt instrument, senior notes | $ 3,250,000,000 |  |
Debt instrument effective interest rate | 2.51% |  | 2.51%
Debt instrument interest rate | 3.25% |  | 3.25%
Second quarter 2016 debt issuance | Fixed-rate 4.500% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2036 |  |
Debt instrument, senior notes | $ 1,250,000,000 |  |
Debt instrument effective interest rate | 4.54% |  | 4.54%
Debt instrument interest rate | 4.50% |  | 4.50%
Second quarter 2016 debt issuance | Fixed-rate 4.650% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2046 |  |
Debt instrument, senior notes | $ 4,000,000,000 |  |
Debt instrument effective interest rate | 4.58% |  | 4.58%
Debt instrument interest rate | 4.65% |  | 4.65%
Third quarter 2016 Australian dollar denominated debt issuance |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, face amount | AUD |  |  | AUD 1,400,000,000
Third quarter 2016 Australian dollar denominated debt issuance | Fixed-rate 2.650% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2020 |  |
Debt instrument, senior notes | $ 493,000,000 |  |
Debt instrument effective interest rate | 1.92% |  | 1.92%
Debt instrument interest rate | 2.65% |  | 2.65%
Third quarter 2016 Australian dollar denominated debt issuance | Fixed-rate 3.350% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2024 |  |
Debt instrument, senior notes | $ 342,000,000 |  |
Debt instrument effective interest rate | 2.61% |  | 2.61%
Debt instrument interest rate | 3.35% |  | 3.35%
Third quarter 2016 Australian dollar denominated debt issuance | Fixed-rate 3.600% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2026 |  |
Debt instrument, senior notes | $ 247,000,000 |  |
Debt instrument effective interest rate | 2.84% |  | 2.84%
Debt instrument interest rate | 3.60% |  | 3.60%
Third quarter 2016 debt issuance | Fixed-rate 4.150% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2046 |  |
Debt instrument, senior notes | $ 1,377,000,000 |  |
Debt instrument effective interest rate | 4.15% |  | 4.15%
Debt instrument, face amount | $ 1,400,000,000 |  |
Debt instrument interest rate | 4.15% |  | 4.15%
Fourth quarter 2016 debt issuance |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, face amount | $ 7,000,000,000 |  |
Fourth quarter 2016 debt issuance | Floating-rate notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2019 |  |
Debt instrument, senior notes | $ 350,000,000 |  |
Debt instrument effective interest rate | 0.91% |  | 0.91%
Fourth quarter 2016 debt issuance | Fixed-rate 1.100% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2019 |  |
Debt instrument, senior notes | $ 1,150,000,000 |  |
Debt instrument effective interest rate | 1.13% |  | 1.13%
Debt instrument interest rate | 1.10% |  | 1.10%
Fourth quarter 2016 debt issuance | Fixed-rate 1.550% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2021 |  |
Debt instrument, senior notes | $ 1,250,000,000 |  |
Debt instrument effective interest rate | 1.40% |  | 1.40%
Debt instrument interest rate | 1.55% |  | 1.55%
Fourth quarter 2016 debt issuance | Fixed-rate 2.450% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2026 |  |
Debt instrument, senior notes | $ 2,250,000,000 |  |
Debt instrument effective interest rate | 2.15% |  | 2.15%
Debt instrument interest rate | 2.45% |  | 2.45%
Fourth quarter 2016 debt issuance | Fixed-rate 3.850% notes |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity year | 2046 |  |
Debt instrument, senior notes | $ 2,000,000,000 |  |
Debt instrument effective interest rate | 3.86% |  | 3.86%
Debt instrument interest rate | 3.85% |  | 3.85%

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