Benefit Plans - Summary of Share-Based Compensation Expense (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Sep. 24, 2016 |
Sep. 26, 2015 |
Sep. 27, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | |||
| Share-based compensation expense | $ 4,210 | $ 3,586 | $ 2,863 |
| Cost of sales | |||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | |||
| Share-based compensation expense | 769 | 575 | 450 |
| Research and Development | |||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | |||
| Share-based compensation expense | 1,889 | 1,536 | 1,216 |
| Selling, General and Administrative | |||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | |||
| Share-based compensation expense | $ 1,552 | $ 1,475 | $ 1,197 |