Commitments and Contingencies - Changes in Accrued Warranties and Related Costs (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Sep. 24, 2016 |
Sep. 26, 2015 |
Sep. 27, 2014 |
|
| Movement in Standard Product Warranty Accrual [Roll Forward] | |||
| Beginning accrued warranty and related costs | $ 4,780 | $ 4,159 | $ 2,967 |
| Cost of warranty claims | (4,663) | (4,401) | (3,760) |
| Accruals for product warranty | 3,585 | 5,022 | 4,952 |
| Ending accrued warranty and related costs | $ 3,702 | $ 4,780 | $ 4,159 |