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Shareholders' Equity - Additional Information (Detail) (USD $)
In Billions, unless otherwise specified |
Dec. 27, 2014
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Sep. 27, 2014
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|---|---|---|
| Stockholders Equity Note Disclosure [Line Items] | ||
| Maximum amount authorized for repurchase of common stock | $ 90 | |
| Share repurchase program, utilized amount | $ 72.9 |