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Shareholders' Equity - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended | ||||||||||||
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Sep. 27, 2014
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Jun. 28, 2014
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Mar. 29, 2014
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Dec. 28, 2013
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Sep. 28, 2013
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Jun. 29, 2013
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Mar. 30, 2013
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Dec. 29, 2012
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Sep. 29, 2012
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Sep. 27, 2014
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Sep. 28, 2013
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Sep. 29, 2012
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Apr. 30, 2014
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Apr. 30, 2013
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| Stockholders Equity Note Disclosure [Line Items] | ||||||||||||||
| Common stock, par value | $ 0.00001 | $ 0.00001 | $ 0.00000 | $ 0.00001 | $ 0.00000 | |||||||||
| Dividends paid | $ 2,807,000,000 | $ 2,830,000,000 | $ 2,655,000,000 | $ 2,739,000,000 | $ 2,763,000,000 | $ 2,789,000,000 | $ 2,490,000,000 | $ 2,486,000,000 | $ 2,500,000,000 | $ 11,031,000,000 | $ 10,528,000,000 | |||
| Quarterly dividends per share declared | $ 0.47 | $ 0.47 | $ 0.44 | $ 0.44 | $ 0.44 | $ 0.44 | $ 0.38 | $ 0.38 | $ 0.38 | $ 1.82 | $ 1.64 | $ 0.38 | ||
| Maximum amount authorized for repurchase of common stock | 10,000,000,000 | 10,000,000,000 | 90,000,000,000 | 60,000,000,000 | ||||||||||
| Share repurchase program, utilized amount | $ 67,900,000,000 | $ 67,900,000,000 | ||||||||||||