v3.5.0.2

Fair Value (Assets and Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Millions | Oct. 29, 2016 | Jul. 30, 2016
--- | --- | ---
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | $ 69,426 | $ 64,602
Derivative assets |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 292 | 385
Derivative liabilities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities | 85 | 54
Cash equivalents: | Money market funds |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 6,749 | 6,049
Cash equivalents: | Corporate debt securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 43
Available-for-sale investments: | Corporate debt securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 29,163 | 24,292
Available-for-sale investments: | U.S. government securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 25,896 | 26,544
Available-for-sale investments: | U.S. government agency securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 2,622 | 2,817
Available-for-sale investments: | Non-U.S. government and agency securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 1,104 | 1,100
Available-for-sale investments: | U.S. agency mortgage-backed securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 2,083 | 1,868
Available-for-sale investments: | Publicly traded equity securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 1,517 | 1,504
Level 1 |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 8,266 | 7,553
Level 1 | Derivative assets |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 1 | Derivative liabilities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities | 0 | 0
Level 1 | Cash equivalents: | Money market funds |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 6,749 | 6,049
Level 1 | Cash equivalents: | Corporate debt securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 1 | Available-for-sale investments: | Corporate debt securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 1 | Available-for-sale investments: | U.S. government securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 1 | Available-for-sale investments: | U.S. government agency securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 1 | Available-for-sale investments: | Non-U.S. government and agency securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 1 | Available-for-sale investments: | U.S. agency mortgage-backed securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 1 | Available-for-sale investments: | Publicly traded equity securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 1,517 | 1,504
Level 2 |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 61,160 | 57,048
Level 2 | Derivative assets |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 292 | 384
Level 2 | Derivative liabilities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities | 85 | 54
Level 2 | Cash equivalents: | Money market funds |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 2 | Cash equivalents: | Corporate debt securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 43
Level 2 | Available-for-sale investments: | Corporate debt securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 29,163 | 24,292
Level 2 | Available-for-sale investments: | U.S. government securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 25,896 | 26,544
Level 2 | Available-for-sale investments: | U.S. government agency securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 2,622 | 2,817
Level 2 | Available-for-sale investments: | Non-U.S. government and agency securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 1,104 | 1,100
Level 2 | Available-for-sale investments: | U.S. agency mortgage-backed securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 2,083 | 1,868
Level 2 | Available-for-sale investments: | Publicly traded equity securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 3 |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 1
Level 3 | Derivative assets |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 1
Level 3 | Derivative liabilities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities | 0 | 0
Level 3 | Cash equivalents: | Money market funds |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 3 | Cash equivalents: | Corporate debt securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 3 | Available-for-sale investments: | Corporate debt securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 3 | Available-for-sale investments: | U.S. government securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 3 | Available-for-sale investments: | U.S. government agency securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 3 | Available-for-sale investments: | Non-U.S. government and agency securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 3 | Available-for-sale investments: | U.S. agency mortgage-backed securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | 0 | 0
Level 3 | Available-for-sale investments: | Publicly traded equity securities |  |
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets | $ 0 | $ 0

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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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