v3.5.0.2

Fair Value (Fair Value, Nonrecurring Measurement) (Details) - Level 3 - USD ($) $ in Millions | 3 Months Ended
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Oct. 29, 2016 | Oct. 24, 2015
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] |  |
Gains (losses) for assets measured on a nonrecurring basis | $ (89) | $ (17)
Investments in privately held companies (impaired) | Other Income (loss), net |  |
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] |  |
Gains (losses) for assets measured on a nonrecurring basis | (47) | (17)
Purchased intangible assets (impaired) | Cost of Sales and Operating Expenses |  |
Fair Value Assets And Liabilities Measured On Nonrecurring Basis [Line Items] |  |
Gains (losses) for assets measured on a nonrecurring basis | $ (42) | $ 0

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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