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Borrowings - Additional Information (Detail) (USD $)
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3 Months Ended | |
|---|---|---|
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Oct. 26, 2013
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Jul. 27, 2013
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| Debt Instrument [Line Items] | ||
| ST debt financing program- Commercial paper notes | $ 3,000,000,000 | |
| Commercial Paper Outstanding | 0 | 0 |
| Notional amount of derivatives | 12,800,000,000 | 12,992,000,000 |
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Unsecured Debt [Member]
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| Debt Instrument [Line Items] | ||
| Unsecured Revolving Credit Facility | 3,000,000,000 | |
| Unsecured revolving credit facility maturity date | Feb. 17, 2017 | |
| Line of Credit Facility, Interest Rate Description | either (i) the higher of the Federal Funds rate plus 0.50%, Bank of America's “prime rate” as announced from time to time, or one-month LIBOR plus 1.00%, or (ii) LIBOR plus a margin that is based on the Company's senior debt credit ratings | |
| Interest Rate- Federal Funds rate plus 0.5% | 0.50% | |
| Interest Rate- One-month LIBOR plus 1.00% | 1.00% | |
| Available increases under the credit facility | 2,000,000,000 | |
| Additional unsecured revolving credit facility maturity date | Feb. 17, 2019 | |
|
Designated as Hedging Instrument [Member] | Interest Rate Derivatives [Member]
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| Debt Instrument [Line Items] | ||
| Notional amount of derivatives | $ 5,750,000,000 | $ 5,250,000,000 |