Derivative Instruments - Effect of Derivative Instruments Designated as Fair Value Hedges (Details) - Interest and other income (loss), net - Interest rate derivatives - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Apr. 30, 2022	May 01, 2021	Apr. 30, 2022	May 01, 2021
Derivative [Line Items]
Hedged items	$ 54	$ 25	$ 112	$ 58
Derivatives designated as hedging instruments	(55)	(25)	(114)	(59)
Total	$ (1)	$ 0	$ (2)	$ (1)

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=121577467&loc=d3e76258-113986

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- Definition

Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

+ References

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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

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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.

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