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Derivative Instruments (Effect Of Derivative Instruments Designated As Cash Flow Hedges On Other Comprehensive Income And Consolidated Statements Of Operations Summary) (Detail) (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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Cash Flow Hedging
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| Derivative [Line Items] | |||
| Gains (losses) recognized in OCI on derivatives (effective portion) | $ (131) | $ 87 | $ 56 |
| Gains (losses) reclassified from AOCI into income (effective portion) | (72) | 108 | (1) |
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Cash Flow Hedging | Foreign Currency Derivatives
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| Derivative [Line Items] | |||
| Gains (losses) recognized in OCI on derivatives (effective portion) | (131) | 87 | 33 |
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Cash Flow Hedging | Interest Rate Derivatives
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| Derivative [Line Items] | |||
| Gains (losses) recognized in OCI on derivatives (effective portion) | 23 | ||
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Cash Flow Hedging | Operating Expenses | Foreign Currency Derivatives
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| Derivative [Line Items] | |||
| Gains (losses) reclassified from AOCI into income (effective portion) | (59) | 89 | (1) |
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Cash Flow Hedging | Cost Of Sales-Service
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| Derivative [Line Items] | |||
| Gains (losses) reclassified from AOCI into income (effective portion) | (14) | 17 | |
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Cash Flow Hedging | Interest Expense | Interest Rate Derivatives
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| Derivative [Line Items] | |||
| Gains (losses) reclassified from AOCI into income (effective portion) | 1 | 2 | |
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Net Investment Hedging | Foreign Currency Derivatives
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| Derivative [Line Items] | |||
| Gains (losses) recognized in OCI on derivatives (effective portion) | $ 23 | $ (10) | $ (2) |