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Derivative Instruments - Schedule of Notional Amounts of Derivatives Outstanding (Details) - USD ($) $ in Millions | Oct. 24, 2020 | Jul. 25, 2020
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Derivative [Line Items] |  |
Derivatives | $ 7,459 | $ 7,395
Foreign currency derivatives |  |
Derivative [Line Items] |  |
Derivatives | 4,338 | 4,315
Interest rate derivatives |  |
Derivative [Line Items] |  |
Derivatives | 2,500 | 2,500
Total return swaps—deferred compensation |  |
Derivative [Line Items] |  |
Derivatives | $ 621 | $ 580

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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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