v2.4.0.6

Fair Value (Assets and Liabilities Measured At Fair Value On Recurring Basis) (Detail) (USD $) In Millions, unless otherwise specified | Jul. 28, 2012 | Jul. 30, 2011
--- | --- | ---
Level 1 |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | $ 4,126 | $ 7,213
Level 2 |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 37,560 | 35,662
Liabilities, Fair Value Disclosure | 42 | 24
Level 2 | Derivative Assets |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 263 | 220
Level 2 | Derivative Liabilities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities, Fair Value Disclosure | 42 | 24
Level 3 |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 1 | 123
Level 3 | Derivative Assets |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 1 | 2
Total |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 41,687 | 42,998
Liabilities, Fair Value Disclosure | 42 | 24
Total | Derivative Assets |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 264 | 222
Total | Derivative Liabilities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities, Fair Value Disclosure | 42 | 24
Cash Equivalents | Level 1 | Money market funds |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 2,506 | 5,852
Cash Equivalents | Level 2 | U.S. Government Agency Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements |  | 1
Cash Equivalents | Total | Money market funds |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 2,506 | 5,852
Cash Equivalents | Total | U.S. Government Agency Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements |  | 1
Available-For-Sale Investments | Level 1 | Publicly Traded Equity Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 1,620 | 1,361
Available-For-Sale Investments | Level 2 | U.S. Government Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 24,241 | 19,139
Available-For-Sale Investments | Level 2 | U.S. Government Agency Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 5,388 | 8,776
Available-For-Sale Investments | Level 2 | Non-U.S. Government And Agency Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 1,638 | 3,132
Available-For-Sale Investments | Level 2 | Corporate Debt Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 6,030 | 4,394
Available-For-Sale Investments | Level 3 | Asset-Backed Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements |  | 121
Available-For-Sale Investments | Total | U.S. Government Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 24,241 | 19,139
Available-For-Sale Investments | Total | U.S. Government Agency Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 5,388 | 8,776
Available-For-Sale Investments | Total | Non-U.S. Government And Agency Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 1,638 | 3,132
Available-For-Sale Investments | Total | Corporate Debt Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | 6,030 | 4,394
Available-For-Sale Investments | Total | Asset-Backed Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements |  | 121
Available-For-Sale Investments | Total | Publicly Traded Equity Securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets, fair value measurements | $ 1,620 | $ 1,361

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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- Definition This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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