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Derivative Instruments - Effect of Derivative Instruments Not Designated as Hedges on Consolidated Statements of Operations (Details) - Derivatives not designated as hedging instruments: - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jan. 29, 2022 | Jan. 23, 2021 | Jan. 29, 2022 | Jan. 23, 2021
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Total gains (losses) | $ (80) | $ 118 | $ (75) | $ 160
Foreign currency derivatives | Other income (loss), net |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Total gains (losses) | (36) | 33 | (56) | 47
Total return swaps—deferred compensation | Operating expenses and other |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Total gains (losses) | (41) | 76 | (20) | 99
Equity derivatives | Other income (loss), net |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Total gains (losses) | $ (3) | $ 9 | $ 1 | $ 14

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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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