Shareholders' Equity - Additional Information (Detail) - USD ($) |
Mar. 26, 2016 |
Sep. 26, 2015 |
|---|---|---|
| Stockholders Equity Note Disclosure [Line Items] | ||
| Maximum amount authorized for repurchase of common stock | $ 140,000,000,000 | |
| Share repurchase program, utilized amount | $ 117,000,000,000 |