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Derivative Instruments - Effect of Derivative Instruments Not Designated as Hedges on Consolidated Statement of Operations Summary (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions | 12 Months Ended
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Jul. 27, 2019 | Jul. 28, 2018 | Jul. 29, 2017
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
GAINS (LOSSES) FOR THE YEARS ENDED | $ (52) | $ 15 | $ 82
Foreign currency derivatives | Other income (loss), net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
GAINS (LOSSES) FOR THE YEARS ENDED | (60) | (24) | 13
Total return swaps—deferred compensation | Other income (loss), net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
GAINS (LOSSES) FOR THE YEARS ENDED | (16) | (11) | 0
Total return swaps—deferred compensation | Operating expenses |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
GAINS (LOSSES) FOR THE YEARS ENDED | 19 | 50 | 53
Total return swaps—deferred compensation | Cost of sales |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
GAINS (LOSSES) FOR THE YEARS ENDED | 2 | 4 | 5
Equity derivatives | Other income (loss), net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
GAINS (LOSSES) FOR THE YEARS ENDED | $ 3 | $ (4) | $ 11

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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