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Debt - Additional Information (Detail) (USD $)
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12 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
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Sep. 27, 2014
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Sep. 28, 2013
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Jun. 28, 2014
2014 Debt Issuance
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Jun. 29, 2013
2013 Debt Issuance
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Jun. 28, 2014
Interest Rate Swap
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Jun. 29, 2013
Interest Rate Swap
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Sep. 27, 2014
Maximum
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Sep. 27, 2014
Level 2
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Sep. 28, 2013
Level 2
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| Debt Instrument [Line Items] | |||||||||
| Commercial paper | $ 6,308,000,000 | $ 0 | |||||||
| Commercial paper, weighted-average interest rate | 0.12% | ||||||||
| Commercial paper, maturity period | 9 months | ||||||||
| Debt instrument aggregate principal amount | 29,000,000,000 | 17,000,000,000 | 12,000,000,000 | 17,000,000,000 | |||||
| Notional Amount | 9,000,000,000 | 3,000,000,000 | |||||||
| Interest expense | 381,000,000 | 136,000,000 | |||||||
| Debt instrument fair value | $ 28,500,000,000 | $ 15,900,000,000 | |||||||