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Derivative Instruments (Effect Of Derivative Instruments Not Designated As Hedges On Consolidated Statement Of Operations Summary) (Detail) (Derivatives Not Designated As Hedging Instruments, USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Jul. 28, 2012
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Jul. 30, 2011
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Jul. 31, 2010
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| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gains (losses) recognized in income | $ (193) | $ 322 | $ (70) |
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Foreign Currency Derivatives | Other income, net
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| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gains (losses) recognized in income | (206) | 264 | (100) |
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Total return swaps-deferred compensation | Cost Of Sales-Product
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| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gains (losses) recognized in income | 4 | ||
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Total return swaps-deferred compensation | Operating Expenses
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| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gains (losses) recognized in income | 3 | 33 | 18 |
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Equity Derivatives | Other income, net
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| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Gains (losses) recognized in income | $ 6 | $ 25 | $ 12 |