Reconciliation of Segment Operating Income to Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Dec. 26, 2015 |
Dec. 27, 2014 |
|
| Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] | ||
| Operating income | $ 24,171 | $ 24,246 |
| Research and development expense | (2,404) | (1,895) |
| Operating Segments | ||
| Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] | ||
| Operating income | 27,645 | 27,286 |
| Segment Reconciling Items | ||
| Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] | ||
| Research and development expense | (2,404) | (1,895) |
| Corporate Non-Segment | ||
| Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] | ||
| Other corporate expenses, net | $ (1,070) | $ (1,145) |