Summary of Share-Based Compensation Expense (Detail) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Dec. 26, 2015 |
Dec. 27, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Share-based compensation expense | $ 1,078 | $ 888 |
| Cost of sales | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Share-based compensation expense | 204 | 140 |
| Research and Development | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Share-based compensation expense | 466 | 374 |
| Selling, General and Administrative | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Share-based compensation expense | $ 408 | $ 374 |