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Derivative Instruments - Effect of Derivative Instruments Not Designated as Hedges on Consolidated Statement of Operations (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions | 12 Months Ended
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Jul. 31, 2021 | Jul. 25, 2020 | Jul. 27, 2019
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
GAINS (LOSSES) FOR THE YEARS ENDED | $ 179 | $ 19 | $ (52)
Foreign currency derivatives | Other income (loss), net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
GAINS (LOSSES) FOR THE YEARS ENDED | 2 | (5) | (60)
Total return swaps—deferred compensation | Operating expenses and other |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
GAINS (LOSSES) FOR THE YEARS ENDED | 157 | 15 | 5
Equity derivatives | Other income (loss), net |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
GAINS (LOSSES) FOR THE YEARS ENDED | $ 20 | $ 9 | $ 3

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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=125515794&loc=SL5618551-113959 + Details
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