Summary of Term Debt (Detail) - USD ($) $ in Millions | 12 Months Ended |
Sep. 26, 2015 | Sep. 27, 2014 |
Debt Instrument [Line Items] | | |
Total term debt | $ 55,701 | $ 29,000 |
Unamortized discount | (114) | (52) |
Hedge accounting fair value adjustments | 376 | 39 |
Less: Current portion of long-term debt | (2,500) | 0 |
Total long-term debt | 53,463 | 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 | 2,016 | 2,016 |
Debt instrument maturity year, end | 2,018 | 2,018 |
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 | 2,016 | 2,016 |
Debt instrument maturity year, end | 2,043 | 2,043 |
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 | 2,017 | 2,017 |
Debt instrument maturity year, end | 2,019 | 2,019 |
Debt instrument effective interest rate, minimum | 0.37% | 0.31% |
Debt instrument effective interest rate, maximum | 0.60% | 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 | 2,017 | 2,017 |
Debt instrument maturity year, end | 2,044 | 2,044 |
Debt instrument effective interest rate, minimum | 0.37% | 0.30% |
Debt instrument effective interest rate, maximum | 4.48% | 4.48% |
First quarter 2015 euro-denominated debt issuance | Fixed-rate 1.000% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 1,558 | $ 0 |
Debt instrument maturity year | 2,022 | 2,022 |
Debt instrument effective interest rate | 2.94% | 0.00% |
First quarter 2015 euro-denominated debt issuance | Fixed-rate 1.625% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 1,558 | $ 0 |
Debt instrument maturity year | 2,026 | 2,026 |
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 | 2,020 | 2,020 |
Debt instrument effective interest rate | 0.56% | 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 | 2,020 | 2,020 |
Debt instrument effective interest rate | 0.56% | 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 | 2,022 | 2,022 |
Debt instrument effective interest rate | 0.87% | 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 | 2,025 | 2,025 |
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 | 2,045 | 2,045 |
Debt instrument effective interest rate | 3.58% | 0.00% |
Second quarter 2015 Swiss franc-denominated debt issuance | Fixed-rate 0.375% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 895 | $ 0 |
Debt instrument maturity year | 2,024 | 2,024 |
Debt instrument effective interest rate | 0.28% | 0.00% |
Second quarter 2015 Swiss franc-denominated debt issuance | Fixed-rate 0.750% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 384 | $ 0 |
Debt instrument maturity year | 2,030 | 2,030 |
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 | 2,017 | 2,017 |
Debt instrument effective interest rate | 0.36% | 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 | 2,020 | 2,020 |
Debt instrument effective interest rate | 0.61% | 0.00% |
Third quarter 2015 debt issuance | Fixed-rate 0.900% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 750 | $ 0 |
Debt instrument maturity year | 2,017 | 2,017 |
Debt instrument effective interest rate | 0.35% | 0.00% |
Third quarter 2015 debt issuance | Fixed-rate 2.000% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 1,250 | $ 0 |
Debt instrument maturity year | 2,020 | 2,020 |
Debt instrument effective interest rate | 0.61% | 0.00% |
Third quarter 2015 debt issuance | Fixed-rate 2.700% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 1,250 | $ 0 |
Debt instrument maturity year | 2,022 | 2,022 |
Debt instrument effective interest rate | 0.99% | 0.00% |
Third quarter 2015 debt issuance | Fixed-rate 3.200% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 2,000 | $ 0 |
Debt instrument maturity year | 2,025 | 2,025 |
Debt instrument effective interest rate | 1.22% | 0.00% |
Third quarter 2015 debt issuance | Fixed-rate 4.375% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 2,000 | $ 0 |
Debt instrument maturity year | 2,045 | 2,045 |
Debt instrument effective interest rate | 4.40% | 0.00% |
Third quarter 2015 Japanese yen-denominated debt issuance | Fixed-rate 0.35% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 2,081 | $ 0 |
Debt instrument maturity year | 2,020 | 2,020 |
Debt instrument effective interest rate | 0.35% | 0.00% |
Fourth quarter 2015 British pound-denominated debt issuance | Fixed-rate 3.05% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 1,148 | $ 0 |
Debt instrument maturity year | 2,029 | 2,029 |
Debt instrument effective interest rate | 3.79% | 0.00% |
Fourth quarter 2015 British pound-denominated debt issuance | Fixed-rate 3.60% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 766 | $ 0 |
Debt instrument maturity year | 2,042 | 2,042 |
Debt instrument effective interest rate | 4.51% | 0.00% |
Fourth quarter 2015 Australian dollar-denominated debt issuance | Floating-rate notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 493 | $ 0 |
Debt instrument maturity year | 2,019 | 2,019 |
Debt instrument effective interest rate | 1.87% | 0.00% |
Fourth quarter 2015 Australian dollar-denominated debt issuance | Fixed-rate 2.85% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 282 | $ 0 |
Debt instrument maturity year | 2,019 | 2,019 |
Debt instrument effective interest rate | 1.89% | 0.00% |
Fourth quarter 2015 Australian dollar-denominated debt issuance | Fixed-rate 3.70% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 810 | $ 0 |
Debt instrument maturity year | 2,022 | 2,022 |
Debt instrument effective interest rate | 2.79% | 0.00% |
Fourth quarter 2015 euro-denominated debt issuance | Fixed-rate 1.375% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 1,113 | $ 0 |
Debt instrument maturity year | 2,024 | 2,024 |
Debt instrument effective interest rate | 3.30% | 0.00% |
Fourth quarter 2015 euro-denominated debt issuance | Fixed-rate 2.000% notes | | |
Debt Instrument [Line Items] | | |
Debt instrument, senior notes | $ 1,113 | $ 0 |
Debt instrument maturity year | 2,027 | 2,027 |
Debt instrument effective interest rate | 3.85% | 0.00% |